Merge tag 'iio-for-6.18a' of ssh://gitolite.kernel.org/pub/scm/linux/kernel/git/jic23/iio into char-misc-next

Jonathan writes:

IIO: New device support, features and cleanup for 6.18

New device support
==================

ad,ade9000
- New driver for this complex energy and power monitoring ADC.
infineon,tlv493d
- New driver for this 3D magnetic sensor.
intel,dollar
- New driver for this TI PMIC (part number unknown)
marvel,88pm886
- Driver for this PMIC ADC.
microchip,mcp9600
- Add explicit support for the mcp9601 which has some additional features
over the mcp9600.
rohm,bd79112
- New driver for this ADC / GPIO Chip.

Features
========
Core
- New helper to multiply data expressed in IIO types.
- Add KUnit tests.
- New IIO_ALTCURRENT type, similar to existing IIO_ALTVOLTAGE
- Add some channel modifiers related to energy and power, such as
reactive.
adi,ad7124
- Support external clocks sources and output of the internal clocks.
- Filter control.
adi,ad7173
- Add filter support. Some fiddly interactions with other parameters on this
device.
adi,ad7779
- Add backend support which required control of the number of lanes used.
liteon,ltr390
- Add runtime PM support.
microchip,mcp9600
- Add support for different thermocouple types.

Cleanup and minor fixes
=======================

core
- Switch info_mask fields to be unsigned. Not clear why they were ever
signed.
- Fix handling of negative channel scale in iio_convert_raw_to_processed()
- Fix offset handling for channels without a scale attribute.
- Improve the precision of scaling slightly.
- Drop apparent handling of IIO_CHAN_INFO_PROCESSED for devices that don't
have any such channels.
various
- Drop many pm_runtime_mark_last_busy() calls now
pm_runtime_put_autosuspend() calls it internally.
- Drop dev_err_probe() calls where the error code is hard coded as -ENOMEM
as they don't do anything.
- Drop dev_err() calls where the error code is -ENOMEM. This will reduce
error prints, but memory failures generate a lot of messages anyway
so unlikely we need these prints.
current-sense-amplifier
- Add #io-channels property this channel to be used by a consumer driver.
adi,ad7124
- Fix incorrect clocks dt-binding property.
- Make the mclk clock optional in DT - this is internal to the ADC so should
never have been in he binding.
- Fix up sample rate to comply with ABI.
- Use read_avail() callback rather than opencoding similar.
- Deploy guard() to clean up some lock handling.
adi,ad7768
- Use devm_regulator_get_enable_read_voltage() to replace similar code.
adi,ad7816
- Drop an unnecessary dev_set_drvdata() call as nothing uses the data.
ad,adxl345
- Fix missing blank line before bullet list in documentation.
arm,scmi
- Use devm_kcalloc() for an array allocation rather than devm_kzalloc().
bosch,bmi270
- Match an ACPI ID seen in the wild. It is not spec compliant but we can't
do much about that.
bosch,bmp280
- Drop overly noisy dev_info()
- Allow for sleeping gpio controllers.
gogle,cros-ec
- Drop unused location attribute that has been replaced by label.
invense,icm42600
- Simplify the power management.
- Use guard() to simplify some locking.
maxim,max1238
- Add io-channel-cells property to dt-binding as there is an in tree
consumer.
microchip,mcp9600
- Specify a default value in dt-binding for the thermocouple type
- General whitespace cleanup.
samsung,exynos
- Drop support for the S3C2410 including bindings, and touchscreen support
as nothing else uses that.
- Drop platform ID based binding as not used.
st,vl53l0x
- Fix returning the wrong variable in an error path.
ti,pac1934
- Replace open coded devm_mutex_init().
xilinx,ams
- Update maintainers entry.

* tag 'iio-for-6.18a' of ssh://gitolite.kernel.org/pub/scm/linux/kernel/git/jic23/iio: (178 commits)
MAINTAINERS: Support ROHM BD79112 ADC
iio: adc: Support ROHM BD79112 ADC/GPIO
dt-bindings: iio: adc: ROHM BD79112 ADC/GPIO
iio: pressure: bmp280: Use gpiod_set_value_cansleep()
iio: pressure: bmp280: Remove noisy dev_info()
iio: ABI: add filter types for ad7173
iio: adc: ad7173: support changing filter type
iio: adc: ad7173: rename odr field
iio: adc: ad7173: rename ad7173_chan_spec_ext_info
iio: adc: Add driver for Marvell 88PM886 PMIC ADC
dt-bindings: mfd: 88pm886: Add #io-channel-cells
iio: ABI: document "sinc4+rej60" filter_type
iio: adc: ad7124: add filter support
iio: adc: ad7124: support fractional sampling_frequency
iio: adc: ad7124: use guard(mutex) to simplify return paths
iio: adc: ad7124: use read_avail() for scale_available
iio: adc: ad7124: use clamp()
iio: adc: ad7124: fix sample rate for multi-channel use
Documentation: ABI: iio: add sinc4+lp
docs: iio: add documentation for ade9000 driver
...

Documentation/ABI/testing/sysfs-bus-iio

···
 		is required is a consistent labeling.  Units after application
 		of scale and offset are millivolts.
 
+What:		/sys/bus/iio/devices/iio:deviceX/in_altvoltageY_rms_raw
+KernelVersion:	6.18
+Contact:	[e-mail]
+Description:
+		Raw (unscaled) Root Mean Square (RMS) voltage measurement from
+		channel Y. Units after application of scale and offset are
+		millivolts.
+
 What:		/sys/bus/iio/devices/iio:deviceX/in_powerY_raw
+What:		/sys/bus/iio/devices/iio:deviceX/in_powerY_active_raw
+What:		/sys/bus/iio/devices/iio:deviceX/in_powerY_reactive_raw
+What:		/sys/bus/iio/devices/iio:deviceX/in_powerY_apparent_raw
 KernelVersion:	4.5
 Contact:	[e-mail]
 Description:
···
 		channel Y. The number must always be specified and
 		unique to allow association with event codes. Units after
 		application of scale and offset are milliwatts.
+
+What:		/sys/bus/iio/devices/iio:deviceX/in_powerY_powerfactor
+KernelVersion:	6.18
+Contact:	[e-mail]
+Description:
+		Power factor measurement from channel Y. Power factor is the
+		ratio of active power to apparent power. The value is unitless.
 
 What:		/sys/bus/iio/devices/iio:deviceX/in_capacitanceY_raw
 KernelVersion:	3.2
···
 
 What:		/sys/.../iio:deviceX/in_energy_input
 What:		/sys/.../iio:deviceX/in_energy_raw
+What:		/sys/.../iio:deviceX/in_energyY_active_raw
+What:		/sys/.../iio:deviceX/in_energyY_reactive_raw
+What:		/sys/.../iio:deviceX/in_energyY_apparent_raw
 KernelVersion:	4.0
 Contact:	[e-mail]
 Description:
···
 		channels refer to the same signal. The 'i' channel contains the in-phase
 		component of the signal while the 'q' channel contains the quadrature
 		component.
+
+What:		/sys/bus/iio/devices/iio:deviceX/in_altcurrentY_rms_raw
+KernelVersion:	6.18
+Contact:	[e-mail]
+Description:
+		Raw (unscaled no bias removal etc.) Root Mean Square (RMS) current
+		measurement from channel Y. Units after application of scale and
+		offset are milliamps.
 
 What:		/sys/.../iio:deviceX/in_energy_en
 What:		/sys/.../iio:deviceX/in_distance_en
···
 		  conversion time. Poor noise performance.
 		* "sinc3" - The digital sinc3 filter. Moderate 1st
 		  conversion time. Good noise performance.
-		* "sinc4" - Sinc 4. Excellent noise performance. Long
-		  1st conversion time.
-		* "sinc5" - The digital sinc5 filter. Excellent noise
-		  performance
-		* "sinc4+sinc1" - Sinc4 + averaging by 8. Low 1st conversion
-		  time.
-		* "sinc3+rej60" - Sinc3 + 60Hz rejection.
-		* "sinc3+sinc1" - Sinc3 + averaging by 8. Low 1st conversion
-		  time.
 		* "sinc3+pf1" - Sinc3 + device specific Post Filter 1.
 		* "sinc3+pf2" - Sinc3 + device specific Post Filter 2.
 		* "sinc3+pf3" - Sinc3 + device specific Post Filter 3.
 		* "sinc3+pf4" - Sinc3 + device specific Post Filter 4.
-		* "sinc5+pf1" - Sinc5 + device specific Post Filter 1.
+		* "sinc3+rej60" - Sinc3 + 60Hz rejection.
+		* "sinc3+sinc1" - Sinc3 + averaging by 8. Low 1st conversion
+		  time.
+		* "sinc4" - Sinc 4. Excellent noise performance. Long
+		  1st conversion time.
+		* "sinc4+lp" - Sinc4 + Low Pass Filter.
+		* "sinc4+sinc1" - Sinc4 + averaging by 8. Low 1st conversion
+		  time.
+		* "sinc4+rej60" - Sinc4 + 60Hz rejection.
+		* "sinc5" - The digital sinc5 filter. Excellent noise
+		  performance
 		* "sinc5+avg" - Sinc5 + averaging by 4.
+		* "sinc5+pf1" - Sinc5 + device specific Post Filter 1.
+		* "sinc5+sinc1" - Sinc5 + Sinc1.
+		* "sinc5+sinc1+pf1" - Sinc5 + Sinc1 + device specific Post Filter 1.
+		* "sinc5+sinc1+pf2" - Sinc5 + Sinc1 + device specific Post Filter 2.
+		* "sinc5+sinc1+pf3" - Sinc5 + Sinc1 + device specific Post Filter 3.
+		* "sinc5+sinc1+pf4" - Sinc5 + Sinc1 + device specific Post Filter 4.
 		* "wideband" - filter with wideband low ripple passband
 		  and sharp transition band.
 

Documentation/ABI/testing/sysfs-bus-iio-cros-ec

···
                 corresponding calibration offsets can be read from `*_calibbias`
                 entries.
 
-What:		/sys/bus/iio/devices/iio:deviceX/location
-Date:		July 2015
-KernelVersion:	4.7
-Contact:	[e-mail]
-Description:
-		This attribute returns a string with the physical location where
-                the motion sensor is placed. For example, in a laptop a motion
-                sensor can be located on the base or on the lid. Current valid
-		values are 'base' and 'lid'.
-
 What:		/sys/bus/iio/devices/iio:deviceX/id
 Date:		September 2017
 KernelVersion:	4.14

Documentation/devicetree/bindings/iio/accel/adi,adis16240.yaml

···
 title: ADIS16240 Programmable Impact Sensor and Recorder driver
 
 maintainers:
-  - Alexandru Tachici <[e-mail]>
+  - Marcelo Schmitt <[e-mail]>
+  - Nuno Sá <[e-mail]>
 
 description: |
   ADIS16240 Programmable Impact Sensor and Recorder driver that supports
···
 
 examples:
   - |
-    #include <dt-bindings/gpio/gpio.h>
     #include <dt-bindings/interrupt-controller/irq.h>
     spi {
         #address-cells = <1>;

Documentation/devicetree/bindings/iio/accel/adi,adxl313.yaml

···
 
 examples:
   - |
-    #include <dt-bindings/gpio/gpio.h>
     #include <dt-bindings/interrupt-controller/irq.h>
     i2c {
         #address-cells = <1>;
···
         };
     };
   - |
-    #include <dt-bindings/gpio/gpio.h>
     #include <dt-bindings/interrupt-controller/irq.h>
     spi {
         #address-cells = <1>;

Documentation/devicetree/bindings/iio/accel/adi,adxl345.yaml

···
 
 examples:
   - |
-    #include <dt-bindings/gpio/gpio.h>
     #include <dt-bindings/interrupt-controller/irq.h>
     i2c {
         #address-cells = <1>;
···
         };
     };
   - |
-    #include <dt-bindings/gpio/gpio.h>
     #include <dt-bindings/interrupt-controller/irq.h>
     spi {
         #address-cells = <1>;

Documentation/devicetree/bindings/iio/accel/adi,adxl355.yaml

···
 
 examples:
   - |
-    #include <dt-bindings/gpio/gpio.h>
     #include <dt-bindings/interrupt-controller/irq.h>
     i2c {
         #address-cells = <1>;
···
         };
     };
   - |
-    #include <dt-bindings/gpio/gpio.h>
     #include <dt-bindings/interrupt-controller/irq.h>
     spi {
         #address-cells = <1>;

Documentation/devicetree/bindings/iio/accel/adi,adxl372.yaml

···
 title: Analog Devices ADXL372 3-Axis, +/-(200g) Digital Accelerometer
 
 maintainers:
-  - Stefan Popa <[e-mail]>
+  - Marcelo Schmitt <[e-mail]>
+  - Nuno Sá <[e-mail]>
 
 description: |
   Analog Devices ADXL372 3-Axis, +/-(200g) Digital Accelerometer that supports
···
 
 examples:
   - |
-    #include <dt-bindings/gpio/gpio.h>
     #include <dt-bindings/interrupt-controller/irq.h>
     i2c {
         #address-cells = <1>;
···
         };
     };
   - |
-    #include <dt-bindings/gpio/gpio.h>
     #include <dt-bindings/interrupt-controller/irq.h>
     spi {
         #address-cells = <1>;

Documentation/devicetree/bindings/iio/accel/bosch,bma255.yaml

···
         };
     };
   - |
-    # include <dt-bindings/interrupt-controller/irq.h>
     spi {
         #address-cells = <1>;
         #size-cells = <0>;

Documentation/devicetree/bindings/iio/accel/bosch,bma400.yaml

···
 
 examples:
   - |
-    #include <dt-bindings/gpio/gpio.h>
     #include <dt-bindings/interrupt-controller/irq.h>
     i2c {
       #address-cells = <1>;

Documentation/devicetree/bindings/iio/accel/kionix,kxsd9.yaml

···
         };
     };
   - |
-    # include <dt-bindings/interrupt-controller/irq.h>
     spi {
         #address-cells = <1>;
         #size-cells = <0>;

Documentation/devicetree/bindings/iio/adc/adi,ad7091r5.yaml

···
 
 examples:
   - |
-    #include <dt-bindings/gpio/gpio.h>
     #include <dt-bindings/interrupt-controller/irq.h>
     i2c {
         #address-cells = <1>;

Documentation/devicetree/bindings/iio/adc/adi,ad7124.yaml

···
 title: Analog Devices AD7124 ADC device driver
 
 maintainers:
-  - Stefan Popa <[e-mail]>
+  - Marcelo Schmitt <[e-mail]>
+  - Nuno Sá <[e-mail]>
 
 description: |
   Bindings for the Analog Devices AD7124 ADC device. Datasheet can be
···
 
   clocks:
     maxItems: 1
-    description: phandle to the master clock (mclk)
+    description: Optional external clock connected to the CLK pin.
 
   clock-names:
+    deprecated: true
+    description:
+      MCLK is an internal counter in the ADC. Do not use this property.
     items:
       - const: mclk
+
+  '#clock-cells':
+    description:
+      The CLK pin can be used as an output. When that is the case, include
+      this property.
+    const: 0
 
   interrupts:
     description: IRQ line for the ADC
···
 required:
   - compatible
   - reg
-  - clocks
-  - clock-names
   - interrupts
+
+# Can't have both clock input and output at the same time.
+not:
+  required:
+    - '#clock-cells'
+    - clocks
 
 patternProperties:
   "^channel@([0-9]|1[0-5])$":
···
         interrupt-parent = <&gpio>;
         rdy-gpios = <&gpio 25 GPIO_ACTIVE_LOW>;
         refin1-supply = <&adc_vref>;
-        clocks = <&ad7124_mclk>;
-        clock-names = "mclk";
 
         #address-cells = <1>;
         #size-cells = <0>;

Documentation/devicetree/bindings/iio/adc/adi,ad7173.yaml

···
 examples:
   # Example AD7173-8 with external reference connected to REF+/REF-:
   - |
-    #include <dt-bindings/gpio/gpio.h>
     #include <dt-bindings/interrupt-controller/irq.h>
 
     spi {

Documentation/devicetree/bindings/iio/adc/adi,ad7476.yaml

···
               - adi,ad7910
               - adi,ad7920
               - adi,ad7940
+              - rohm,bd79105
               - ti,adc081s
               - ti,adc101s
               - ti,adc121s
···
           - const: ti,ads7866
 
   reg:
+    maxItems: 1
+
+  interrupts:
+    description:
+      The data-ready interrupt. Provided via DOUT pin.
     maxItems: 1
 
   vcc-supply:
···
     description: A GPIO used to trigger the start of a conversion
     maxItems: 1
 
+  rdy-gpios:
+    description: A GPIO for detecting the data-ready.
+    maxItems: 1
+
 required:
   - compatible
   - reg
 
 allOf:
   - $ref: /schemas/spi/spi-peripheral-props.yaml#
+
+# Devices with an IRQ
+  - if:
+      properties:
+        compatible:
+          contains:
+            enum:
+              - rohm,bd79105
+    then:
+      properties:
+        interrupts: true
+    else:
+      properties:
+        interrupts: false
 
   # Devices where reference is vcc
   - if:
···
         - vcc-supply
   # Devices with a vref
   - if:
-      properties:
-        compatible:
-          contains:
-            enum:
-              - adi,ad7091r
-              - adi,ad7273
-              - adi,ad7274
-              - adi,ad7475
-              - lltc,ltc2314-14
+      not:
+        properties:
+          compatible:
+            contains:
+              enum:
+                - adi,ad7091r
+                - adi,ad7273
+                - adi,ad7274
+                - adi,ad7475
+                - lltc,ltc2314-14
+                - rohm,bd79105
     then:
-      properties:
-        vref-supply: true
-    else:
       properties:
         vref-supply: false
   # Devices with a vref where it is not optional
···
               - adi,ad7274
               - adi,ad7475
               - lltc,ltc2314-14
+              - rohm,bd79105
     then:
       required:
         - vref-supply
   - if:
-      properties:
-        compatible:
-          contains:
-            enum:
-              - adi,ad7475
-              - adi,ad7495
+      not:
+        properties:
+          compatible:
+            contains:
+              enum:
+                - adi,ad7475
+                - adi,ad7495
+                - rohm,bd79105
     then:
       properties:
-        vdrive-supply: true
-    else:
-      properties:
         vdrive-supply: false
+
+  # Devices which support polling the data-ready via GPIO
+  - if:
+      not:
+        properties:
+          compatible:
+            contains:
+              enum:
+                - rohm,bd79105
+    then:
+      properties:
+        rdy-gpios: false
+
+  - if:
+      not:
+        properties:
+          compatible:
+            contains:
+              enum:
+                - adi,ad7091
+                - adi,ad7091r
+                - rohm,bd79105
+    then:
+      properties:
+        adi,conversion-start-gpios: false
+
+  # Devices with a convstart GPIO where it is not optional
   - if:
       properties:
         compatible:
           contains:
             enum:
-              - adi,ad7091
-              - adi,ad7091r
+              - rohm,bd79105
     then:
-      properties:
-        adi,conversion-start-gpios: true
-    else:
-      properties:
-        adi,conversion-start-gpios: false
+      required:
+        - adi,conversion-start-gpios
 
 unevaluatedProperties: false
 

Documentation/devicetree/bindings/iio/adc/adi,ad7779.yaml

···
   reset-gpios:
     maxItems: 1
 
+  io-backends:
+    maxItems: 1
+
+  adi,num-lanes:
+    description:
+      Number of lanes on which the data is sent on the output when the data
+      output interface is used.
+    $ref: /schemas/types.yaml#/definitions/uint32
+    enum: [1, 2, 4]
+    default: 4
+
 required:
   - compatible
   - reg
   - clocks
-  - interrupts
+
+allOf:
+  - if:
+      not:
+        required:
+          - io-backends
+    then:
+      properties:
+        adi,num-lanes: false
+
+oneOf:
+  - required:
+      - interrupts
+  - required:
+      - io-backends
 
 unevaluatedProperties: false
 
···
           interrupts = <0 56 IRQ_TYPE_LEVEL_HIGH>;
           interrupt-names = "adc_rdy";
           clocks = <&adc_clk>;
+        };
+    };
+
+  - |
+    #include <dt-bindings/gpio/gpio.h>
+    spi {
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        adc@0 {
+          compatible = "adi,ad7779";
+          reg = <0>;
+          start-gpios = <&gpio0 87 GPIO_ACTIVE_LOW>;
+          reset-gpios = <&gpio0 93 GPIO_ACTIVE_LOW>;
+          clocks = <&adc_clk>;
+          io-backends = <&iio_backend>;
+          adi,num-lanes = <4>;
         };
     };
 ...

Documentation/devicetree/bindings/iio/adc/adi,ade9000.yaml

···
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+# Copyright 2025 Analog Devices Inc.
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/iio/adc/adi,ade9000.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Analog Devices ADE9000 High Performance, Polyphase Energy Metering
+
+maintainers:
+  - Antoniu Miclaus <[e-mail]>
+
+description: |
+  The ADE9000 is a highly accurate, fully integrated, multiphase energy and power
+  quality monitoring device. Superior analog performance and a digital signal
+  processing (DSP) core enable accurate energy monitoring over a wide dynamic
+  range. An integrated high end reference ensures low drift over temperature
+  with a combined drift of less than ±25 ppm/°C maximum for the entire channel
+  including a programmable gain amplifier (PGA) and an analog-to-digital
+  converter (ADC).
+
+  https://www.analog.com/media/en/technical-documentation/data-sheets/ADE9000.pdf
+
+$ref: /schemas/spi/spi-peripheral-props.yaml#
+
+properties:
+  compatible:
+    enum:
+      - adi,ade9000
+
+  reg:
+    maxItems: 1
+
+  spi-max-frequency:
+    maximum: 20000000
+
+  interrupts:
+    maxItems: 3
+
+  interrupt-names:
+    items:
+      enum: [irq0, irq1, dready]
+    minItems: 1
+    maxItems: 3
+
+  reset-gpios:
+    description:
+      Must be the device tree identifier of the RESET pin. As the line is
+      active low, it should be marked GPIO_ACTIVE_LOW.
+    maxItems: 1
+
+  vdd-supply: true
+
+  vref-supply: true
+
+  clocks:
+    description: External clock source when not using crystal
+    maxItems: 1
+
+
+  "#clock-cells":
+    description:
+      ADE9000 can provide clock output via CLKOUT pin with external buffer.
+    const: 0
+
+required:
+  - compatible
+  - reg
+  - vdd-supply
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/gpio/gpio.h>
+    #include <dt-bindings/interrupt-controller/irq.h>
+
+    spi {
+      #address-cells = <1>;
+      #size-cells = <0>;
+
+      adc@0 {
+          compatible = "adi,ade9000";
+          reg = <0>;
+          spi-max-frequency = <7000000>;
+
+          #clock-cells = <0>;
+          reset-gpios = <&gpio 4 GPIO_ACTIVE_LOW>;
+          interrupts = <2 IRQ_TYPE_EDGE_FALLING>, <3 IRQ_TYPE_EDGE_FALLING>, <4 IRQ_TYPE_EDGE_FALLING>;
+          interrupt-names = "irq0", "irq1", "dready";
+          interrupt-parent = <&gpio>;
+          clocks = <&ext_clock_24576khz>;
+          vdd-supply = <&vdd_reg>;
+      };
+    };

Documentation/devicetree/bindings/iio/adc/lltc,ltc2496.yaml

···
 maintainers:
   - Lars-Peter Clausen <[e-mail]>
   - Michael Hennerich <[e-mail]>
-  - Stefan Popa <[e-mail]>
 
 properties:
   compatible:

Documentation/devicetree/bindings/iio/adc/maxim,max1238.yaml

···
   reg:
     maxItems: 1
 
+  "#io-channel-cells":
+    const: 1
+
   vcc-supply: true
   vref-supply:
     description: Optional external reference.  If not supplied, internal

Documentation/devicetree/bindings/iio/adc/maxim,max1241.yaml

···
             vdd-supply = <&adc_vdd>;
             vref-supply = <&adc_vref>;
             spi-max-frequency = <1000000>;
-            shutdown-gpios = <&gpio 26 1>;
+            shutdown-gpios = <&gpio 26 GPIO_ACTIVE_LOW>;
         };
     };

Documentation/devicetree/bindings/iio/adc/qcom,spmi-vadc.yaml

···
   - |
     #include <dt-bindings/iio/qcom,spmi-adc7-pmk8350.h>
     #include <dt-bindings/iio/qcom,spmi-adc7-pm8350.h>
-    #include <dt-bindings/interrupt-controller/irq.h>
 
     pmic {
         #address-cells = <1>;

Documentation/devicetree/bindings/iio/adc/rockchip-saradc.yaml

···
       - const: saradc
       - const: apb_pclk
 
+  power-domains:
+    maxItems: 1
+
   resets:
     maxItems: 1
 

Documentation/devicetree/bindings/iio/adc/rohm,bd79104.yaml

···
 
 properties:
   compatible:
-    const: rohm,bd79104
+    oneOf:
+      - enum:
+          - rohm,bd79100
+          - rohm,bd79101
+          - rohm,bd79102
+          - rohm,bd79104
+      - items:
+          - const: rohm,bd79103
+          - const: rohm,bd79104
 
   reg:
     maxItems: 1
···
 
 examples:
   - |
-    #include <dt-bindings/interrupt-controller/irq.h>
     spi {
         #address-cells = <1>;
         #size-cells = <0>;

Documentation/devicetree/bindings/iio/adc/rohm,bd79112.yaml

···
+# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/iio/adc/rohm,bd79112.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: ROHM BD79112 ADC/GPO
+
+maintainers:
+  - Matti Vaittinen <[e-mail]>
+
+description: |
+  The ROHM BD79112 is a 12-bit, 32-channel, SAR ADC. ADC input pins can be
+  also configured as general purpose inputs/outputs. SPI should use MODE 3.
+
+properties:
+  compatible:
+    const: rohm,bd79112
+
+  reg:
+    maxItems: 1
+
+  spi-cpha: true
+  spi-cpol: true
+
+  gpio-controller: true
+  "#gpio-cells":
+    const: 2
+
+  vdd-supply: true
+
+  iovdd-supply: true
+
+  "#address-cells":
+    const: 1
+
+  "#size-cells":
+    const: 0
+
+patternProperties:
+  "^channel@([0-9]|[12][0-9]|3[01])$":
+    type: object
+    $ref: /schemas/iio/adc/adc.yaml#
+    description: Represents ADC channel. Omitted channels' inputs are GPIOs.
+
+    properties:
+      reg:
+        description: AIN pin number
+        minimum: 0
+        maximum: 31
+
+    required:
+      - reg
+
+    additionalProperties: false
+
+required:
+  - compatible
+  - reg
+  - iovdd-supply
+  - vdd-supply
+  - spi-cpha
+  - spi-cpol
+
+additionalProperties: false
+
+examples:
+  - |
+    spi {
+        #address-cells = <1>;
+        #size-cells = <0>;
+        adc: adc@0 {
+            compatible = "rohm,bd79112";
+            reg = <0x0>;
+
+            spi-cpha;
+            spi-cpol;
+
+            vdd-supply = <&dummyreg>;
+            iovdd-supply = <&dummyreg>;
+
+            #address-cells = <1>;
+            #size-cells = <0>;
+
+            gpio-controller;
+            #gpio-cells = <2>;
+
+            channel@0 {
+                reg = <0>;
+            };
+            channel@1 {
+                reg = <1>;
+            };
+            channel@2 {
+                reg = <2>;
+            };
+            channel@16 {
+                reg = <16>;
+            };
+            channel@20 {
+                reg = <20>;
+            };
+        };
+    };

Documentation/devicetree/bindings/iio/adc/rohm,bd79124.yaml

···
             reg = <0x10>;
 
             interrupt-parent = <&gpio1>;
-            interrupts = <29 8>;
+            interrupts = <29 IRQ_TYPE_LEVEL_LOW>;
 
             vdd-supply = <&dummyreg>;
             iovdd-supply = <&dummyreg>;

Documentation/devicetree/bindings/iio/adc/samsung,exynos-adc.yaml

···
           - samsung,exynos3250-adc
           - samsung,exynos4212-adc                # Exynos4212 and Exynos4412
           - samsung,exynos7-adc
-          - samsung,s3c2410-adc
-          - samsung,s3c2416-adc
-          - samsung,s3c2440-adc
-          - samsung,s3c2443-adc
           - samsung,s3c6410-adc
           - samsung,s5pv210-adc
       - items:
···
     maxItems: 2
 
   interrupts:
-    description:
-      ADC interrupt followed by optional touchscreen interrupt.
     minItems: 1
     maxItems: 2
 
···
     description:
       Phandle to the PMU system controller node (to access the ADC_PHY
       register on Exynos3250/4x12/5250/5420/5800).
-
-  has-touchscreen:
-    description:
-      If present, indicates that a touchscreen is connected and usable.
-    type: boolean
 
 required:
   - compatible
···
             - const: adc
 
   - if:
-      required:
-        - has-touchscreen
+      properties:
+        compatible:
+          contains:
+            const: samsung,s5pv210-adc
     then:
       properties:
         interrupts:
-          minItems: 2
-          maxItems: 2
+          items:
+            - description: main (ADC)
+            - description: pending (PENDN)
+    else:
+      properties:
+        interrupts:
+          maxItems: 1
 
 examples:
   - |
+    #include <dt-bindings/interrupt-controller/arm-gic.h>
+
     adc: adc@12d10000 {
         compatible = "samsung,exynos-adc-v1";
         reg = <0x12d10000 0x100>;
-        interrupts = <0 106 0>;
+        interrupts = <GIC_SPI 106 IRQ_TYPE_LEVEL_HIGH>;
         #io-channel-cells = <1>;
 
         clocks = <&clock 303>;
···
 
   - |
     #include <dt-bindings/clock/exynos3250.h>
+    #include <dt-bindings/interrupt-controller/arm-gic.h>
 
     adc@126c0000 {
         compatible = "samsung,exynos3250-adc";
         reg = <0x126c0000 0x100>;
-        interrupts = <0 137 0>;
+        interrupts = <GIC_SPI 137 IRQ_TYPE_LEVEL_HIGH>;
         #io-channel-cells = <1>;
 
         clocks = <&cmu CLK_TSADC>,

Documentation/devicetree/bindings/iio/adc/ti,adc128s052.yaml

···
 
 examples:
   - |
-    #include <dt-bindings/interrupt-controller/irq.h>
     spi {
         #address-cells = <1>;
         #size-cells = <0>;

Documentation/devicetree/bindings/iio/adc/ti,ads1298.yaml

···
 
 examples:
   - |
-    #include <dt-bindings/gpio/gpio.h>
     #include <dt-bindings/interrupt-controller/irq.h>
     spi {
         #address-cells = <1>;

Documentation/devicetree/bindings/iio/adc/xlnx,zynqmp-ams.yaml

···
 title: Xilinx Zynq Ultrascale AMS controller
 
 maintainers:
-  - Anand Ashok Dumbre <[e-mail]>
+  - Salih Erim <[e-mail]>
+  - Conall O'Griofa <[e-mail]>
 
 description: |
   The AMS (Analog Monitoring System) includes an ADC as well as on-chip sensors

Documentation/devicetree/bindings/iio/afe/current-sense-amplifier.yaml

···
     description: |
       Channel node of a voltage io-channel.
 
+  "#io-channel-cells":
+    const: 0
+
   sense-resistor-micro-ohms:
     description: The sense resistance.
 
···
   - |
     sysi {
         compatible = "current-sense-amplifier";
+        #io-channel-cells = <0>;
         io-channels = <&tiadc 0>;
 
         sense-resistor-micro-ohms = <20000>;

Documentation/devicetree/bindings/iio/dac/adi,ad5770r.yaml

···
 title: Analog Devices AD5770R DAC device driver
 
 maintainers:
-  - Alexandru Tachici <[e-mail]>
+  - Marcelo Schmitt <[e-mail]>
+  - Nuno Sá <[e-mail]>
 
 description: |
   Bindings for the Analog Devices AD5770R current DAC device. Datasheet can be

Documentation/devicetree/bindings/iio/dac/adi,ltc2664.yaml

···
 
             channel@1 {
                 reg = <1>;
-                output-range-microvolt= <0 10000000>;
+                output-range-microvolt = <0 10000000>;
             };
         };
     };

Documentation/devicetree/bindings/iio/frequency/adf4371.yaml

···
 title: Analog Devices ADF4371/ADF4372 Wideband Synthesizers
 
 maintainers:
-  - Popa Stefan <[e-mail]>
+  - Marcelo Schmitt <[e-mail]>
+  - Nuno Sá <[e-mail]>
 
 description: |
   Analog Devices ADF4371/ADF4372 SPI Wideband Synthesizers

Documentation/devicetree/bindings/iio/imu/adi,adis16460.yaml

···
 
 examples:
   - |
-    #include <dt-bindings/gpio/gpio.h>
     #include <dt-bindings/interrupt-controller/irq.h>
     spi {
         #address-cells = <1>;

Documentation/devicetree/bindings/iio/imu/adi,adis16480.yaml

···
 title: Analog Devices ADIS16480 and similar IMUs
 
 maintainers:
-  - Alexandru Tachici <[e-mail]>
+  - Marcelo Schmitt <[e-mail]>
+  - Nuno Sá <[e-mail]>
 
 properties:
   compatible:

Documentation/devicetree/bindings/iio/imu/invensense,icm42600.yaml

···
 
 examples:
   - |
-    #include <dt-bindings/gpio/gpio.h>
     #include <dt-bindings/interrupt-controller/irq.h>
     i2c {
         #address-cells = <1>;
···
         };
     };
   - |
-    #include <dt-bindings/gpio/gpio.h>
     #include <dt-bindings/interrupt-controller/irq.h>
     spi {
         #address-cells = <1>;

Documentation/devicetree/bindings/iio/imu/nxp,fxos8700.yaml

···
 
 examples:
   - |
-    #include <dt-bindings/gpio/gpio.h>
     #include <dt-bindings/interrupt-controller/irq.h>
     i2c {
         #address-cells = <1>;
···
         };
     };
   - |
-    #include <dt-bindings/gpio/gpio.h>
     #include <dt-bindings/interrupt-controller/irq.h>
     spi {
         #address-cells = <1>;

Documentation/devicetree/bindings/iio/light/dynaimage,al3010.yaml

···
             compatible = "dynaimage,al3010";
             reg = <0x1c>;
             vdd-supply = <&vdd_reg>;
-            interrupts = <0 99 4>;
+            interrupts = <99 IRQ_TYPE_LEVEL_HIGH>;
         };
     };

Documentation/devicetree/bindings/iio/light/dynaimage,al3320a.yaml

···
             compatible = "dynaimage,al3320a";
             reg = <0x1c>;
             vdd-supply = <&vdd_reg>;
-            interrupts = <0 99 4>;
+            interrupts = <99 IRQ_TYPE_LEVEL_HIGH>;
         };
     };

Documentation/devicetree/bindings/iio/light/st,vl6180.yaml

···
 
 examples:
   - |
-    #include <dt-bindings/interrupt-controller/irq.h>
     i2c {
         #address-cells = <1>;
         #size-cells = <0>;

Documentation/devicetree/bindings/iio/light/vishay,veml6046x00.yaml

···
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/iio/light/vishay,veml6046x00.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Vishay VEML6046X00 High accuracy RGBIR color sensor
+
+maintainers:
+  - Andreas Klinger <[e-mail]>
+
+description:
+  VEML6046X00 datasheet at https://www.vishay.com/docs/80173/veml6046x00.pdf
+
+properties:
+  compatible:
+    enum:
+      - vishay,veml6046x00
+
+  reg:
+    maxItems: 1
+
+  vdd-supply: true
+
+  interrupts:
+    maxItems: 1
+
+required:
+  - compatible
+  - reg
+  - vdd-supply
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/interrupt-controller/irq.h>
+
+    i2c {
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        color-sensor@29 {
+            compatible = "vishay,veml6046x00";
+            reg = <0x29>;
+            vdd-supply = <&vdd_reg>;
+            interrupt-parent = <&gpio2>;
+            interrupts = <3 IRQ_TYPE_EDGE_FALLING>;
+        };
+    };
+...

Documentation/devicetree/bindings/iio/magnetometer/infineon,tlv493d-a1b6.yaml

···
+# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/iio/magnetometer/infineon,tlv493d-a1b6.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Infineon Technologies TLV493D Low-Power 3D Magnetic Sensor
+
+maintainers:
+  - Dixit Parmar <[e-mail]>
+
+properties:
+  $nodename:
+    pattern: '^magnetometer@[0-9a-f]+$'
+
+  compatible:
+    const: infineon,tlv493d-a1b6
+
+  reg:
+    maxItems: 1
+
+  vdd-supply:
+    description: 2.8V to 3.5V VDD supply
+
+  interrupts:
+    maxItems: 1
+
+required:
+  - compatible
+  - reg
+  - vdd-supply
+
+additionalProperties: false
+
+examples:
+  - |
+    i2c {
+      #address-cells = <1>;
+      #size-cells = <0>;
+      magnetometer@5e {
+        compatible = "infineon,tlv493d-a1b6";
+        reg = <0x5e>;
+        vdd-supply = <&hall_vcc>;
+      };
+    };

Documentation/devicetree/bindings/iio/magnetometer/voltafield,af8133j.yaml

···
 
 examples:
   - |
-    #include <dt-bindings/interrupt-controller/irq.h>
     #include <dt-bindings/gpio/gpio.h>
     i2c {
         #address-cells = <1>;

Documentation/devicetree/bindings/iio/pressure/bmp085.yaml

···
     };
   - |
     # include <dt-bindings/gpio/gpio.h>
-    # include <dt-bindings/interrupt-controller/irq.h>
     spi {
         #address-cells = <1>;
         #size-cells = <0>;

Documentation/devicetree/bindings/iio/pressure/invensense,icp10100.yaml

···
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/iio/pressure/invensense,icp10100.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: InvenSense ICP-101xx Barometric Pressure Sensors
+
+maintainers:
+  - Jean-Baptiste Maneyrol <[e-mail]>
+
+description: |
+  Support for ICP-101xx family: ICP-10100, ICP-10101, ICP-10110, ICP-10111.
+  Those devices uses a simple I2C communication bus, measuring the pressure
+  in a ultra-low noise at the lowest power.
+  Datasheet: https://product.tdk.com/system/files/dam/doc/product/sensor/pressure/capacitive-pressure/data_sheet/ds-000186-icp-101xx.pdf
+
+properties:
+  compatible:
+    oneOf:
+      - items:
+          - enum:
+              - invensense,icp10101
+              - invensense,icp10110
+              - invensense,icp10111
+          - const: invensense,icp10100
+      - const: invensense,icp10100
+
+  reg:
+    maxItems: 1
+
+  vdd-supply: true
+
+required:
+  - compatible
+  - reg
+  - vdd-supply
+
+additionalProperties: false
+
+examples:
+  - |
+    i2c {
+        #address-cells = <1>;
+        #size-cells = <0>;
+        pressure@63 {
+            compatible = "invensense,icp10101", "invensense,icp10100";
+            reg = <0x63>;
+            vdd-supply = <&vdd_1v8>;
+        };
+    };
+...

Documentation/devicetree/bindings/iio/temperature/microchip,mcp9600.yaml

···
 $id: http://devicetree.org/schemas/iio/temperature/microchip,mcp9600.yaml#
 $schema: http://devicetree.org/meta-schemas/core.yaml#
 
-title: Microchip MCP9600 thermocouple EMF converter
+title: Microchip MCP9600 and similar thermocouple EMF converters
 
 maintainers:
   - Andrew Hepp <[e-mail]>
···
 
 properties:
   compatible:
-    const: microchip,mcp9600
+    oneOf:
+      - const: microchip,mcp9600
+      - items:
+          - const: microchip,mcp9601
+          - const: microchip,mcp9600
 
   reg:
     maxItems: 1
···
 
   thermocouple-type:
     $ref: /schemas/types.yaml#/definitions/uint32
+    default: 3
     description:
       Type of thermocouple (THERMOCOUPLE_TYPE_K if omitted).
       Use defines in dt-bindings/iio/temperature/thermocouple.h.
       Supported types are B, E, J, K, N, R, S, T.
 
+  microchip,vsense:
+    type: boolean
+    description:
+      This flag indicates that the chip has been wired with VSENSE to
+      enable open and short circuit detect.
+
   vdd-supply: true
+
+allOf:
+  - if:
+      properties:
+        compatible:
+          not:
+            contains:
+              const: microchip,mcp9601
+    then:
+      properties:
+        interrupts:
+          minItems: 1
+          maxItems: 4
+        interrupt-names:
+          minItems: 1
+          maxItems: 4
+          items:
+            enum:
+              - alert1
+              - alert2
+              - alert3
+              - alert4
+        microchip,vsense: false
 
 required:
   - compatible
···
             reg = <0x60>;
             interrupt-parent = <&gpio>;
             interrupts = <25 IRQ_TYPE_EDGE_RISING>;
-            interrupt-names = "open-circuit";
+            interrupt-names = "alert1";
             thermocouple-type = <THERMOCOUPLE_TYPE_K>;
             vdd-supply = <&vdd>;
+        };
+    };
+  - |
+    #include <dt-bindings/interrupt-controller/irq.h>
+    i2c {
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        temperature-sensor@62 {
+            compatible = "microchip,mcp9601", "microchip,mcp9600";
+            reg = <0x62>;
+            interrupt-parent = <&gpio>;
+            interrupts = <22 IRQ_TYPE_EDGE_RISING>, <23 IRQ_TYPE_EDGE_RISING>;
+            interrupt-names = "open-circuit", "short-circuit";
+            vdd-supply = <&vdd>;
+            microchip,vsense;
         };
     };

Documentation/devicetree/bindings/mfd/marvell,88pm886-a1.yaml

···
         description: LDO or buck regulator.
         unevaluatedProperties: false
 
+  '#io-channel-cells':
+    const: 1
+
 required:
   - compatible
   - reg
···
         reg = <0x30>;
         interrupts = <0 4 IRQ_TYPE_LEVEL_HIGH>;
         interrupt-parent = <&gic>;
+        #io-channel-cells = <1>;
         wakeup-source;
 
         regulators {

Documentation/devicetree/bindings/trivial-devices.yaml

···
           - infineon,ir36021
             # Infineon IRPS5401 Voltage Regulator (PMIC)
           - infineon,irps5401
-            # Infineon TLV493D-A1B6 I2C 3D Magnetic Sensor
-          - infineon,tlv493d-a1b6
             # Infineon Hot-swap controller xdp710
           - infineon,xdp710
             # Infineon Multi-phase Digital VR Controller xdpe11280

Documentation/iio/ad3552r.rst

···
 Usage examples
 --------------
 
-. code-block:: bash
+.. code-block:: bash
+
 	root:/sys/bus/iio/devices/iio:device0# cat data_source
 	normal
 	root:/sys/bus/iio/devices/iio:device0# echo -n ramp-16bit > data_source

Documentation/iio/ade9000.rst

···
+.. SPDX-License-Identifier: GPL-2.0
+
+===============
+ADE9000 driver
+===============
+
+This driver supports Analog Device's ADE9000 energy measurement IC on SPI bus.
+
+1. Supported devices
+====================
+
+* `ADE9000 <https://www.analog.com/media/en/technical-documentation/data-sheets/ADE9000.pdf>`_
+
+The ADE9000 is a highly accurate, fully integrated, multiphase energy and power
+quality monitoring device. Superior analog performance and a digital signal
+processing (DSP) core enable accurate energy monitoring over a wide dynamic
+range. An integrated high end reference ensures low drift over temperature
+with a combined drift of less than ±25 ppm/°C maximum for the entire channel
+including a programmable gain amplifier (PGA) and an analog-to-digital
+converter (ADC).
+
+2. Device attributes
+====================
+
+Power and energy measurements are provided for voltage, current, active power,
+reactive power, apparent power, and power factor across three phases.
+
+Each IIO device has a device folder under ``/sys/bus/iio/devices/iio:deviceX``,
+where X is the IIO index of the device. Under these folders reside a set of
+device files, depending on the characteristics and features of the hardware
+device in question. These files are consistently generalized and documented in
+the IIO ABI documentation.
+
+The following tables show the ADE9000 related device files, found in the
+specific device folder path ``/sys/bus/iio/devices/iio:deviceX``.
+
++---------------------------------------------------+----------------------------------------------------------+
+| Current measurement related device files          | Description                                              |
++---------------------------------------------------+----------------------------------------------------------+
+| in_current[0-2]_raw                               | Raw current measurement for phases A, B, C.              |
++---------------------------------------------------+----------------------------------------------------------+
+| in_current[0-2]_scale                             | Scale for current channels.                              |
++---------------------------------------------------+----------------------------------------------------------+
+| in_current[0-2]_calibscale                        | Calibration gain for current channels (AIGAIN reg).      |
++---------------------------------------------------+----------------------------------------------------------+
+| in_altcurrent[0-2]_rms_raw                        | RMS current measurement for phases A, B, C.              |
++---------------------------------------------------+----------------------------------------------------------+
+| in_altcurrent[0-2]_rms_scale                      | Scale for RMS current channels.                          |
++---------------------------------------------------+----------------------------------------------------------+
+| in_altcurrent[0-2]_rms_calibbias                  | RMS offset correction for current channels (IRMSOS reg). |
++---------------------------------------------------+----------------------------------------------------------+
+
++---------------------------------------------------+----------------------------------------------------------+
+| Voltage measurement related device files          | Description                                              |
++---------------------------------------------------+----------------------------------------------------------+
+| in_voltage[0-2]_raw                               | Raw voltage measurement for phases A, B, C.              |
++---------------------------------------------------+----------------------------------------------------------+
+| in_voltage[0-2]_scale                             | Scale for voltage channels.                              |
++---------------------------------------------------+----------------------------------------------------------+
+| in_voltage[0-2]_calibscale                        | Calibration gain for voltage channels (AVGAIN reg).      |
++---------------------------------------------------+----------------------------------------------------------+
+| in_voltage[0-2]_frequency                         | Measured line frequency from instantaneous voltage.      |
++---------------------------------------------------+----------------------------------------------------------+
+| in_altvoltage[0-2]_rms_raw                        | RMS voltage measurement for phases A, B, C.              |
++---------------------------------------------------+----------------------------------------------------------+
+| in_altvoltage[0-2]_rms_scale                      | Scale for RMS voltage channels.                          |
++---------------------------------------------------+----------------------------------------------------------+
+| in_altvoltage[0-2]_rms_calibbias                  | RMS offset correction for voltage channels (VRMSOS reg). |
++---------------------------------------------------+----------------------------------------------------------+
+
++---------------------------------------------------+----------------------------------------------------------+
+| Power measurement related device files            | Description                                              |
++---------------------------------------------------+----------------------------------------------------------+
+| in_power[0-2]_active_raw                          | Active power measurement for phases A, B, C.             |
++---------------------------------------------------+----------------------------------------------------------+
+| in_power[0-2]_active_scale                        | Scale for active power channels.                         |
++---------------------------------------------------+----------------------------------------------------------+
+| in_power[0-2]_active_calibbias                    | Calibration offset for active power (xWATTOS regs).      |
++---------------------------------------------------+----------------------------------------------------------+
+| in_power[0-2]_active_calibscale                   | Calibration gain for active power (APGAIN reg).          |
++---------------------------------------------------+----------------------------------------------------------+
+| in_power[0-2]_reactive_raw                        | Reactive power measurement for phases A, B, C.           |
++---------------------------------------------------+----------------------------------------------------------+
+| in_power[0-2]_reactive_scale                      | Scale for reactive power channels.                       |
++---------------------------------------------------+----------------------------------------------------------+
+| in_power[0-2]_reactive_calibbias                  | Calibration offset for reactive power (xVAROS regs).     |
++---------------------------------------------------+----------------------------------------------------------+
+| in_power[0-2]_apparent_raw                        | Apparent power measurement for phases A, B, C.           |
++---------------------------------------------------+----------------------------------------------------------+
+| in_power[0-2]_apparent_scale                      | Scale for apparent power channels.                       |
++---------------------------------------------------+----------------------------------------------------------+
+| in_power[0-2]_powerfactor                         | Power factor for phases A, B, C.                         |
++---------------------------------------------------+----------------------------------------------------------+
+
++---------------------------------------------------+----------------------------------------------------------+
+| Energy measurement related device files           | Description                                              |
++---------------------------------------------------+----------------------------------------------------------+
+| in_energy[0-2]_active_raw                         | Active energy measurement for phases A, B, C.            |
++---------------------------------------------------+----------------------------------------------------------+
+| in_energy[0-2]_reactive_raw                       | Reactive energy measurement for phases A, B, C.          |
++---------------------------------------------------+----------------------------------------------------------+
+| in_energy[0-2]_apparent_raw                       | Apparent energy measurement for phases A, B, C.          |
++---------------------------------------------------+----------------------------------------------------------+
+
++------------------------------+------------------------------------------------------------------+
+| Shared device attributes     | Description                                                      |
++------------------------------+------------------------------------------------------------------+
+| name                         | Name of the IIO device.                                          |
++------------------------------+------------------------------------------------------------------+
+| filter_type                  | Waveform buffer filter type (sinc4, sinc4+lp).                   |
++------------------------------+------------------------------------------------------------------+
+| filter_type_available        | Available filter types for waveform buffer.                      |
++------------------------------+------------------------------------------------------------------+
+
+3. Calibration and scaling
+===========================
+
+The ADE9000 provides multiple levels of gain and offset correction:
+
+**Calibration Gain (per-channel)**
+  Fine-tuning calibration gains applied in the digital domain for each channel type.
+  Controlled via ``calibscale`` attributes (AIGAIN, AVGAIN, APGAIN registers).
+
+**Calibration Bias (per-channel)**
+  Hardware calibration offsets applied by the device internally:
+
+  - Power measurements: Controlled via ``calibbias`` attributes for power channels (xWATTOS, xVAROS registers).
+  - RMS measurements: Controlled via ``calibbias`` attributes for RMS channels (IRMSOS, VRMSOS registers).
+
+  These are internal chip calibrations, not userspace-applied offsets.
+
+4. Event attributes
+===================
+
+The ADE9000 provides various interrupts that are mapped to IIO events.
+Event functionality is only available if the corresponding interrupts are
+connected in the device tree.
+
++---------------------------------------------------+----------------------------------------------------------+
+| IIO Event Attribute                               | ADE9000 Datasheet Equivalent                             |
++---------------------------------------------------+----------------------------------------------------------+
+| in_voltage[0-2]_thresh_either_en                  | Zero crossing detection interrupt (ZXVx)                 |
++---------------------------------------------------+----------------------------------------------------------+
+| in_altvoltage[0-2]_rms_thresh_rising_en           | RMS swell detection interrupt (SWELLx)                   |
++---------------------------------------------------+----------------------------------------------------------+
+| in_altvoltage[0-2]_rms_thresh_rising_value        | RMS swell threshold (SWELL_LVL register)                 |
++---------------------------------------------------+----------------------------------------------------------+
+| in_altvoltage[0-2]_rms_thresh_falling_en          | RMS sag/dip detection interrupt (DIPx)                   |
++---------------------------------------------------+----------------------------------------------------------+
+| in_altvoltage[0-2]_rms_thresh_falling_value       | RMS sag/dip threshold (DIP_LVL register)                 |
++---------------------------------------------------+----------------------------------------------------------+
+| in_current[0-2]_thresh_either_en                  | Current zero crossing detection interrupt (ZXIx)         |
++---------------------------------------------------+----------------------------------------------------------+
+
+Event directions:
+
+- ``rising``: Upper threshold crossing (swell detection)
+- ``falling``: Lower threshold crossing (sag/dip detection)
+- ``either``: Any threshold crossing (zero crossing detection)
+- ``none``: Timeout or non-directional events
+
+**Note**: Event attributes are only available if the corresponding interrupts
+(irq0, irq1, dready) are specified in the device tree. The driver works without
+interrupts but with reduced functionality.
+
+5. Device buffers
+=================
+
+This driver supports IIO buffers for waveform capture. Buffer functionality
+requires the dready interrupt to be connected.
+
+The device supports capturing voltage and current waveforms for power quality
+analysis. The waveform buffer can be configured to capture data from different
+channel combinations.
+
+Supported channel combinations for buffered capture:
+
+- Phase A: voltage and current (IA + VA)
+- Phase B: voltage and current (IB + VB)
+- Phase C: voltage and current (IC + VC)
+- All phases: all voltage and current channels
+- Individual channels: IA, VA, IB, VB, IC, VC
+
+Usage examples
+--------------
+
+Enable waveform capture for Phase A:
+
+.. code-block:: bash
+
+        root:/sys/bus/iio/devices/iio:device0> echo 1 > scan_elements/in_current0_en
+        root:/sys/bus/iio/devices/iio:device0> echo 1 > scan_elements/in_voltage0_en
+
+Set buffer length and enable:
+
+.. code-block:: bash
+
+        root:/sys/bus/iio/devices/iio:device0> echo 100 > buffer/length
+        root:/sys/bus/iio/devices/iio:device0> echo 1 > buffer/enable
+
+6. Clock output
+===============
+
+The ADE9000 can provide a clock output via the CLKOUT pin when using an external
+crystal/clock source. This feature is enabled by specifying ``#clock-cells = <0>``
+in the device tree. The output clock will be registered as "clkout" and can be
+referenced by other devices.
+
+7. Usage examples
+=================
+
+Show device name:
+
+.. code-block:: bash
+
+	root:/sys/bus/iio/devices/iio:device0> cat name
+        ade9000
+
+Read voltage measurements:
+
+.. code-block:: bash
+
+        root:/sys/bus/iio/devices/iio:device0> cat in_voltage0_raw
+        12345
+        root:/sys/bus/iio/devices/iio:device0> cat in_voltage0_scale
+        0.000030517
+
+- Phase A voltage = in_voltage0_raw * in_voltage0_scale = 0.3769 V
+
+Read power measurements:
+
+.. code-block:: bash
+
+        root:/sys/bus/iio/devices/iio:device0> cat in_power0_active_raw
+        5678
+        root:/sys/bus/iio/devices/iio:device0> cat in_power0_scale
+        0.000244140
+
+- Phase A active power = in_power0_active_raw * in_power0_scale = 1.386 W
+
+Configure calibration gains:
+
+.. code-block:: bash
+
+        # Set current channel 0 calibration gain
+        root:/sys/bus/iio/devices/iio:device0> echo 0x800000 > in_current0_calibscale
+        # Set voltage channel 0 calibration gain
+        root:/sys/bus/iio/devices/iio:device0> echo 0x7FFFFF > in_voltage0_calibscale
+
+Configure RMS voltage event thresholds (requires interrupts):
+
+.. code-block:: bash
+
+        # Set RMS sag detection threshold
+        root:/sys/bus/iio/devices/iio:device0> echo 180000 > events/in_altvoltage0_rms_thresh_falling_value
+        # Enable RMS sag detection
+        root:/sys/bus/iio/devices/iio:device0> echo 1 > events/in_altvoltage0_rms_thresh_falling_en
+
+        # Set RMS swell detection threshold
+        root:/sys/bus/iio/devices/iio:device0> echo 260000 > events/in_altvoltage0_rms_thresh_rising_value
+        # Enable RMS swell detection
+        root:/sys/bus/iio/devices/iio:device0> echo 1 > events/in_altvoltage0_rms_thresh_rising_en
+
+8. IIO Interfacing Tools
+========================
+
+See ``Documentation/iio/iio_tools.rst`` for the description of the available IIO
+interfacing tools.

Documentation/iio/adxl345.rst

···
+.. SPDX-License-Identifier: GPL-2.0
+
+===============
+ADXL345 driver
+===============
+
+This driver supports Analog Device's ADXL345/375 on SPI/I2C bus.
+
+1. Supported Devices
+====================
+
+* `ADXL345 <https://www.analog.com/ADXL345>`_
+* `ADXL375 <https://www.analog.com/ADXL375>`_
+
+The ADXL345 is a generic purpose low power, 3-axis accelerometer with selectable
+measurement ranges. The ADXL345 supports the ±2 g, ±4 g, ±8 g, and ±16 g ranges.
+
+2. Device Attributes
+====================
+
+Each IIO device, has a device folder under ``/sys/bus/iio/devices/iio:deviceX``,
+where X is the IIO index of the device. Under these folders reside a set of
+device files, depending on the characteristics and features of the hardware
+device in questions. These files are consistently generalized and documented in
+the IIO ABI documentation.
+
+The following table shows the ADXL345 related device files, found in the
+specific device folder path ``/sys/bus/iio/devices/iio:deviceX``.
+
++-------------------------------------------+----------------------------------------------------------+
+| 3-Axis Accelerometer related device files | Description                                              |
++-------------------------------------------+----------------------------------------------------------+
+| in_accel_sampling_frequency               | Currently selected sample rate.                          |
++-------------------------------------------+----------------------------------------------------------+
+| in_accel_sampling_frequency_available     | Available sampling frequency configurations.             |
++-------------------------------------------+----------------------------------------------------------+
+| in_accel_scale                            | Scale/range for the accelerometer channels.              |
++-------------------------------------------+----------------------------------------------------------+
+| in_accel_scale_available                  | Available scale ranges for the accelerometer channel.    |
++-------------------------------------------+----------------------------------------------------------+
+| in_accel_x_calibbias                      | Calibration offset for the X-axis accelerometer channel. |
++-------------------------------------------+----------------------------------------------------------+
+| in_accel_x_raw                            | Raw X-axis accelerometer channel value.                  |
++-------------------------------------------+----------------------------------------------------------+
+| in_accel_y_calibbias                      | y-axis acceleration offset correction                    |
++-------------------------------------------+----------------------------------------------------------+
+| in_accel_y_raw                            | Raw Y-axis accelerometer channel value.                  |
++-------------------------------------------+----------------------------------------------------------+
+| in_accel_z_calibbias                      | Calibration offset for the Z-axis accelerometer channel. |
++-------------------------------------------+----------------------------------------------------------+
+| in_accel_z_raw                            | Raw Z-axis accelerometer channel value.                  |
++-------------------------------------------+----------------------------------------------------------+
+
+Channel Processed Values
+-------------------------
+
+A channel value can be read from its _raw attribute. The value returned is the
+raw value as reported by the devices. To get the processed value of the channel,
+apply the following formula:
+
+.. code-block:: bash
+
+        processed value = (_raw + _offset) * _scale
+
+Where _offset and _scale are device attributes. If no _offset attribute is
+present, simply assume its value is 0.
+
++-------------------------------------+---------------------------+
+| Channel type                        | Measurement unit          |
++-------------------------------------+---------------------------+
+| Acceleration on X, Y, and Z axis    | Meters per second squared |
++-------------------------------------+---------------------------+
+
+Sensor Events
+-------------
+
+Specific IIO events are triggered by their corresponding interrupts. The sensor
+driver supports either none or a single active interrupt (INT) line, selectable
+from the two available options: INT1 or INT2. The active INT line should be
+specified in the device tree. If no INT line is configured, the sensor defaults
+to FIFO bypass mode, where event detection is disabled and only X, Y, and Z axis
+measurements are available.
+
+The table below lists the ADXL345-related device files located in the
+device-specific path: ``/sys/bus/iio/devices/iio:deviceX/events``.
+Note that activity and inactivity detection are DC-coupled by default;
+therefore, only the AC-coupled activity and inactivity events are explicitly
+listed.
+
++---------------------------------------------+---------------------------------------------+
+| Event handle                                | Description                                 |
++---------------------------------------------+---------------------------------------------+
+| in_accel_gesture_doubletap_en               | Enable double tap detection on all axis     |
++---------------------------------------------+---------------------------------------------+
+| in_accel_gesture_doubletap_reset_timeout    | Double tap window in [us]                   |
++---------------------------------------------+---------------------------------------------+
+| in_accel_gesture_doubletap_tap2_min_delay   | Double tap latent in [us]                   |
++---------------------------------------------+---------------------------------------------+
+| in_accel_gesture_singletap_timeout          | Single tap duration in [us]                 |
++---------------------------------------------+---------------------------------------------+
+| in_accel_gesture_singletap_value            | Single tap threshold value in 62.5/LSB      |
++---------------------------------------------+---------------------------------------------+
+| in_accel_mag_falling_period                 | Inactivity time in seconds                  |
++---------------------------------------------+---------------------------------------------+
+| in_accel_mag_falling_value                  | Inactivity threshold value in 62.5/LSB      |
++---------------------------------------------+---------------------------------------------+
+| in_accel_mag_adaptive_rising_en             | Enable AC coupled activity on X axis        |
++---------------------------------------------+---------------------------------------------+
+| in_accel_mag_adaptive_falling_period        | AC coupled inactivity time in seconds       |
++---------------------------------------------+---------------------------------------------+
+| in_accel_mag_adaptive_falling_value         | AC coupled inactivity threshold in 62.5/LSB |
++---------------------------------------------+---------------------------------------------+
+| in_accel_mag_adaptive_rising_value          | AC coupled activity threshold in 62.5/LSB   |
++---------------------------------------------+---------------------------------------------+
+| in_accel_mag_rising_en                      | Enable activity detection on X axis         |
++---------------------------------------------+---------------------------------------------+
+| in_accel_mag_rising_value                   | Activity threshold value in 62.5/LSB        |
++---------------------------------------------+---------------------------------------------+
+| in_accel_x_gesture_singletap_en             | Enable single tap detection on X axis       |
++---------------------------------------------+---------------------------------------------+
+| in_accel_x&y&z_mag_falling_en               | Enable inactivity detection on all axis     |
++---------------------------------------------+---------------------------------------------+
+| in_accel_x&y&z_mag_adaptive_falling_en      | Enable AC coupled inactivity on all axis    |
++---------------------------------------------+---------------------------------------------+
+| in_accel_y_gesture_singletap_en             | Enable single tap detection on Y axis       |
++---------------------------------------------+---------------------------------------------+
+| in_accel_z_gesture_singletap_en             | Enable single tap detection on Z axis       |
++---------------------------------------------+---------------------------------------------+
+
+Please refer to the sensor's datasheet for a detailed description of this
+functionality.
+
+Manually setting the **ODR** will cause the driver to estimate default values
+for inactivity detection timing, where higher ODR values correspond to longer
+default wait times, and lower ODR values to shorter ones. If these defaults do
+not meet your application’s needs, you can explicitly configure the inactivity
+wait time. Setting this value to 0 will revert to the default behavior.
+
+When changing the **g range** configuration, the driver attempts to estimate
+appropriate activity and inactivity thresholds by scaling the default values
+based on the ratio of the previous range to the new one. The resulting threshold
+will never be zero and will always fall between 1 and 255, corresponding to up
+to 62.5 g/LSB as specified in the datasheet. However, you can override these
+estimated thresholds by setting explicit values.
+
+When **activity** and **inactivity** events are enabled, the driver
+automatically manages hysteresis behavior by setting the **link** and
+**auto-sleep** bits. The link bit connects the activity and inactivity
+functions, so that one follows the other. The auto-sleep function puts the
+sensor into sleep mode when inactivity is detected, reducing power consumption
+to the sub-12.5 Hz rate.
+
+The inactivity time is configurable between 1 and 255 seconds. In addition to
+inactivity detection, the sensor also supports free-fall detection, which, from
+the IIO perspective, is treated as a fall in magnitude across all axes. In
+sensor terms, free-fall is defined using an inactivity period ranging from 0.000
+to 1.000 seconds.
+
+The driver behaves as follows:
+
+* If the configured inactivity period is 1 second or more, the driver uses the
+  sensor's inactivity register. This allows the event to be linked with
+  activity detection, use auto-sleep, and be either AC- or DC-coupled.
+
+* If the inactivity period is less than 1 second, the event is treated as plain
+  inactivity or free-fall detection. In this case, auto-sleep and coupling
+  (AC/DC) are not applied.
+
+* If an inactivity time of 0 seconds is configured, the driver selects a
+  heuristically determined default period (greater than 1 second) to optimize
+  power consumption. This also uses the inactivity register.
+
+Note: According to the datasheet, the optimal ODR for detecting activity,
+or inactivity (or when operating with the free-fall register) should fall within
+the range of 12.5 Hz to 400 Hz. The recommended free-fall threshold is between
+300 mg and 600 mg (register values 0x05 to 0x09).
+
+In DC-coupled mode, the current acceleration magnitude is directly compared to
+the values in the THRESH_ACT and THRESH_INACT registers to determine activity or
+inactivity. In contrast, AC-coupled activity detection uses the acceleration
+value at the start of detection as a reference point, and subsequent samples are
+compared against this reference. While DC-coupling is the default mode-comparing
+live values to fixed thresholds-AC-coupling relies on an internal filter
+relative to the configured threshold.
+
+AC and DC coupling modes are configured separately for activity and inactivity
+detection, but only one mode can be active at a time for each. For example, if
+AC-coupled activity detection is enabled and then DC-coupled mode is set, only
+DC-coupled activity detection will be active. In other words, only the most
+recent configuration is applied.
+
+**Single tap** detection can be configured per the datasheet by setting the
+threshold and duration parameters. When only single tap detection is enabled,
+the single tap interrupt triggers as soon as the acceleration exceeds the
+threshold (marking the start of the duration) and then falls below it, provided
+the duration limit is not exceeded. If both single tap and double tap detections
+are enabled, the single tap interrupt is triggered only after the double tap
+event has been either confirmed or dismissed.
+
+To configure **double tap** detection, you must also set the window and latency
+parameters in microseconds (µs). The latency period begins once the single tap
+signal drops below the threshold and acts as a waiting time during which any
+spikes are ignored for double tap detection. After the latency period ends, the
+detection window starts. If the acceleration rises above the threshold and then
+falls below it again within this window, a double tap event is triggered upon
+the fall below the threshold.
+
+Double tap event detection is thoroughly explained in the datasheet. After a
+single tap event is detected, a double tap event may follow, provided the signal
+meets certain criteria. However, double tap detection can be invalidated for
+three reasons:
+
+* If the **suppress bit** is set, any acceleration spike above the tap
+  threshold during the tap latency period immediately invalidates the double tap
+  detection. In other words, no spikes are allowed during latency when the
+  suppress bit is active.
+
+* The double tap event is invalid if the acceleration is above the threshold at
+  the start of the double tap window.
+
+* Double tap detection is also invalidated if the acceleration duration exceeds
+  the limit set by the duration register.
+
+For double tap detection, the same duration applies as for single tap: the
+acceleration must rise above the threshold and then fall below it within the
+specified duration. Note that the suppress bit is typically enabled when double
+tap detection is active.
+
+Usage Examples
+--------------
+
+Show device name:
+
+.. code-block:: bash
+
+        root:/sys/bus/iio/devices/iio:device0> cat name
+        adxl345
+
+Show accelerometer channels value:
+
+.. code-block:: bash
+
+        root:/sys/bus/iio/devices/iio:device0> cat in_accel_x_raw
+        -1
+        root:/sys/bus/iio/devices/iio:device0> cat in_accel_y_raw
+        2
+        root:/sys/bus/iio/devices/iio:device0> cat in_accel_z_raw
+        -253
+
+Set calibration offset for accelerometer channels:
+
+.. code-block:: bash
+
+        root:/sys/bus/iio/devices/iio:device0> cat in_accel_x_calibbias
+        0
+
+        root:/sys/bus/iio/devices/iio:device0> echo 50 > in_accel_x_calibbias
+        root:/sys/bus/iio/devices/iio:device0> cat in_accel_x_calibbias
+        50
+
+Given the 13-bit full resolution, the available ranges are calculated by the
+following formula:
+
+.. code-block:: bash
+
+        (g * 2 * 9.80665) / (2^(resolution) - 1) * 100; for g := 2|4|8|16
+
+Scale range configuration:
+
+.. code-block:: bash
+
+        root:/sys/bus/iio/devices/iio:device0> cat ./in_accel_scale
+        0.478899
+        root:/sys/bus/iio/devices/iio:device0> cat ./in_accel_scale_available
+        0.478899 0.957798 1.915595 3.831190
+
+        root:/sys/bus/iio/devices/iio:device0> echo 1.915595 > ./in_accel_scale
+        root:/sys/bus/iio/devices/iio:device0> cat ./in_accel_scale
+        1.915595
+
+Set output data rate (ODR):
+
+.. code-block:: bash
+
+        root:/sys/bus/iio/devices/iio:device0> cat ./in_accel_sampling_frequency
+        200.000000
+
+        root:/sys/bus/iio/devices/iio:device0> cat ./in_accel_sampling_frequency_available
+        0.097000 0.195000 0.390000 0.781000 1.562000 3.125000 6.250000 12.500000 25.000000 50.000000 100.000000 200.000000 400.000000 800.000000 1600.000000 3200.000000
+
+        root:/sys/bus/iio/devices/iio:device0> echo 1.562000 > ./in_accel_sampling_frequency
+        root:/sys/bus/iio/devices/iio:device0> cat ./in_accel_sampling_frequency
+        1.562000
+
+Configure one or several events:
+
+.. code-block:: bash
+
+        root:> cd /sys/bus/iio/devices/iio:device0
+
+        root:/sys/bus/iio/devices/iio:device0> echo 1 > ./buffer0/in_accel_x_en
+        root:/sys/bus/iio/devices/iio:device0> echo 1 > ./buffer0/in_accel_y_en
+        root:/sys/bus/iio/devices/iio:device0> echo 1 > ./buffer0/in_accel_z_en
+
+        root:/sys/bus/iio/devices/iio:device0> echo 1 > ./scan_elements/in_accel_x_en
+        root:/sys/bus/iio/devices/iio:device0> echo 1 > ./scan_elements/in_accel_y_en
+        root:/sys/bus/iio/devices/iio:device0> echo 1 > ./scan_elements/in_accel_z_en
+
+        root:/sys/bus/iio/devices/iio:device0> echo 14   > ./in_accel_x_calibbias
+        root:/sys/bus/iio/devices/iio:device0> echo 2    > ./in_accel_y_calibbias
+        root:/sys/bus/iio/devices/iio:device0> echo -250 > ./in_accel_z_calibbias
+
+        root:/sys/bus/iio/devices/iio:device0> echo 24 > ./buffer0/length
+
+        ## AC coupled activity, threshold [62.5/LSB]
+        root:/sys/bus/iio/devices/iio:device0> echo 6 > ./events/in_accel_mag_adaptive_rising_value
+
+        ## AC coupled inactivity, threshold, [62.5/LSB]
+        root:/sys/bus/iio/devices/iio:device0> echo 4 > ./events/in_accel_mag_adaptive_falling_value
+
+        ## AC coupled inactivity, time [s]
+        root:/sys/bus/iio/devices/iio:device0> echo 3 > ./events/in_accel_mag_adaptive_falling_period
+
+        ## singletap, threshold
+        root:/sys/bus/iio/devices/iio:device0> echo 35 > ./events/in_accel_gesture_singletap_value
+
+        ## singletap, duration [us]
+        root:/sys/bus/iio/devices/iio:device0> echo 0.001875  > ./events/in_accel_gesture_singletap_timeout
+
+        ## doubletap, window [us]
+        root:/sys/bus/iio/devices/iio:device0> echo 0.025 > ./events/in_accel_gesture_doubletap_reset_timeout
+
+        ## doubletap, latent [us]
+        root:/sys/bus/iio/devices/iio:device0> echo 0.025 > ./events/in_accel_gesture_doubletap_tap2_min_delay
+
+        ## AC coupled activity, enable
+        root:/sys/bus/iio/devices/iio:device0> echo 1 > ./events/in_accel_mag_adaptive_rising_en
+
+        ## AC coupled inactivity, enable
+        root:/sys/bus/iio/devices/iio:device0> echo 1 > ./events/in_accel_x\&y\&z_mag_adaptive_falling_en
+
+        ## singletap, enable
+        root:/sys/bus/iio/devices/iio:device0> echo 1 > ./events/in_accel_x_gesture_singletap_en
+        root:/sys/bus/iio/devices/iio:device0> echo 1 > ./events/in_accel_y_gesture_singletap_en
+        root:/sys/bus/iio/devices/iio:device0> echo 1 > ./events/in_accel_z_gesture_singletap_en
+
+        ## doubletap, enable
+        root:/sys/bus/iio/devices/iio:device0> echo 1 > ./events/in_accel_gesture_doubletap_en
+
+Verify incoming events:
+
+.. code-block:: bash
+
+        root:# iio_event_monitor adxl345
+        Found IIO device with name adxl345 with device number 0
+        Event: time: 1739063415957073383, type: accel(z), channel: 0, evtype: mag, direction: rising
+        Event: time: 1739063415963770218, type: accel(z), channel: 0, evtype: mag, direction: rising
+        Event: time: 1739063416002563061, type: accel(z), channel: 0, evtype: gesture, direction: singletap
+        Event: time: 1739063426271128739, type: accel(x&y&z), channel: 0, evtype: mag, direction: falling
+        Event: time: 1739063436539080713, type: accel(x&y&z), channel: 0, evtype: mag, direction: falling
+        Event: time: 1739063438357970381, type: accel(z), channel: 0, evtype: mag, direction: rising
+        Event: time: 1739063446726161586, type: accel(z), channel: 0, evtype: mag, direction: rising
+        Event: time: 1739063446727892670, type: accel(z), channel: 0, evtype: mag, direction: rising
+        Event: time: 1739063446743019768, type: accel(z), channel: 0, evtype: mag, direction: rising
+        Event: time: 1739063446744650696, type: accel(z), channel: 0, evtype: mag, direction: rising
+        Event: time: 1739063446763559386, type: accel(z), channel: 0, evtype: gesture, direction: singletap
+        Event: time: 1739063448818126480, type: accel(x&y&z), channel: 0, evtype: mag, direction: falling
+        ...
+
+Activity and inactivity belong together and indicate state changes as follows
+
+.. code-block:: bash
+
+        root:# iio_event_monitor adxl345
+        Found IIO device with name adxl345 with device number 0
+        Event: time: 1744648001133946293, type: accel(x), channel: 0, evtype: mag, direction: rising
+          <after inactivity time elapsed>
+        Event: time: 1744648057724775499, type: accel(x&y&z), channel: 0, evtype: mag, direction: falling
+        ...
+
+3. Device Buffers
+=================
+
+This driver supports IIO buffers.
+
+All devices support retrieving the raw acceleration and temperature measurements
+using buffers.
+
+Usage examples
+--------------
+
+Select channels for buffer read:
+
+.. code-block:: bash
+
+        root:/sys/bus/iio/devices/iio:device0> echo 1 > scan_elements/in_accel_x_en
+        root:/sys/bus/iio/devices/iio:device0> echo 1 > scan_elements/in_accel_y_en
+        root:/sys/bus/iio/devices/iio:device0> echo 1 > scan_elements/in_accel_z_en
+
+Set the number of samples to be stored in the buffer:
+
+.. code-block:: bash
+
+        root:/sys/bus/iio/devices/iio:device0> echo 10 > buffer/length
+
+Enable buffer readings:
+
+.. code-block:: bash
+
+        root:/sys/bus/iio/devices/iio:device0> echo 1 > buffer/enable
+
+Obtain buffered data:
+
+.. code-block:: bash
+
+        root:> iio_readdev -b 16 -s 1024 adxl345 | hexdump -d
+        WARNING: High-speed mode not enabled
+        0000000   00003   00012   00013   00005   00010   00011   00005   00011
+        0000010   00013   00004   00012   00011   00003   00012   00014   00007
+        0000020   00011   00013   00004   00013   00014   00003   00012   00013
+        0000030   00004   00012   00013   00005   00011   00011   00005   00012
+        0000040   00014   00005   00012   00014   00004   00010   00012   00004
+        0000050   00013   00011   00003   00011   00012   00005   00011   00013
+        0000060   00003   00012   00012   00003   00012   00012   00004   00012
+        0000070   00012   00003   00013   00013   00003   00013   00012   00005
+        0000080   00012   00013   00003   00011   00012   00005   00012   00013
+        0000090   00003   00013   00011   00005   00013   00014   00003   00012
+        00000a0   00012   00003   00012   00013   00004   00012   00015   00004
+        00000b0   00014   00011   00003   00014   00013   00004   00012   00011
+        00000c0   00004   00012   00013   00004   00014   00011   00004   00013
+        00000d0   00012   00002   00014   00012   00005   00012   00013   00005
+        00000e0   00013   00013   00003   00013   00013   00005   00012   00013
+        00000f0   00004   00014   00015   00005   00012   00011   00005   00012
+        ...
+
+See ``Documentation/iio/iio_devbuf.rst`` for more information about how buffered
+data is structured.
+
+4. IIO Interfacing Tools
+========================
+
+See ``Documentation/iio/iio_tools.rst`` for the description of the available IIO
+interfacing tools.

Documentation/iio/bno055.rst

···
 
 This driver supports Bosch BNO055 IMUs (on both serial and I2C busses).
 
-Accelerometer, magnetometer and gyroscope measures are always provided.
+Accelerometer, magnetometer and gyroscope measurements are always available.
 When "fusion_enable" sysfs attribute is set to 1, orientation (both Euler
 angles and quaternion), linear velocity and gravity vector are also
 provided, but some sensor settings (e.g. low pass filtering and range)
-became locked (the IMU firmware controls them).
+become locked (the IMU firmware controls them).
 
 This driver supports also IIO buffers.
 
···
 operating in fusion mode. The magnetometer autocalibration can however be
 disabled by writing 0 in the sysfs in_magn_calibration_fast_enable attribute.
 
-The driver provides access to autocalibration flags (i.e. you can known if
-the IMU has successfully autocalibrated) and to the calibration data blob.
+The driver provides access to autocalibration flags (i.e. you can determine
+if the IMU has successfully autocalibrated) and to the calibration data blob.
 
 The user can save this blob in a firmware file (i.e. in /lib/firmware) that
 the driver looks for at probe time. If found, then the IMU is initialized
 with this calibration data. This saves the user from performing the
-calibration procedure every time (which consist of moving the IMU in
-various way).
+calibration procedure every time (which consists of moving the IMU in
+various ways).
 
 The driver looks for calibration data file using two different names: first
 a file whose name is suffixed with the IMU unique ID (exposed in sysfs as

Documentation/iio/index.rst

···
    ad7606
    ad7625
    ad7944
+   ade9000
    adis16475
    adis16480
    adis16550
    adxl313
    adxl380
+   adxl345
    bno055
    ep93xx_adc
    opt4060

MAINTAINERS

···
 F:	Documentation/iio/ad7380.rst
 F:	drivers/iio/adc/ad7380.c
 
+AD7476 ADC DRIVER FOR VARIOUS SIMPLE 1-CHANNEL SPI ADCs
+M:	Matti Vaittinen <[e-mail]>
+S:	Maintained
+F:	drivers/iio/adc/ad7476.c
+
 AD7877 TOUCHSCREEN DRIVER
 M:	Michael Hennerich <[e-mail]>
 S:	Supported
···
 F:	Documentation/devicetree/bindings/sound/infineon,peb2466.yaml
 F:	sound/soc/codecs/peb2466.c
 
+INFINEON TLV493D Driver
+M:	Dixit Parmar <[e-mail]>
+L:	[e-mail]
+S:	Maintained
+W:	https://www.infineon.com/part/TLV493D-A1B6
+F:	Documentation/devicetree/bindings/iio/magnetometer/infineon,tlv493d-a1b6.yaml
+F:	drivers/iio/magnetometer/tlv493d.c
+
 INFINIBAND SUBSYSTEM
 M:	Jason Gunthorpe <[e-mail]>
 M:	Leon Romanovsky <[e-mail]>
···
 F:	drivers/rtc/rtc-88pm886.c
 F:	include/linux/mfd/88pm886.h
 
+MARVELL 88PM886 PMIC GPADC DRIVER
+M:	Duje Mihanović <[e-mail]>
+S:	Maintained
+F:	drivers/iio/adc/88pm886-gpadc.c
+
 MARVELL ARMADA 3700 PHY DRIVERS
 M:	Miquel Raynal <[e-mail]>
 S:	Maintained
···
 F:	drivers/regulator/max20086-regulator.c
 
 MAXIM MAX30208 TEMPERATURE SENSOR DRIVER
-M:	Rajat Khandelwal <[e-mail]>
+M:	Marcelo Schmitt <[e-mail]>
 L:	[e-mail]
-S:	Maintained
+S:	Supported
 F:	drivers/iio/temperature/max30208.c
 
 MAXIM MAX77650 PMIC MFD DRIVER
···
 F:	drivers/power/supply/bd99954-charger.c
 F:	drivers/power/supply/bd99954-charger.h
 
-ROHM BD79124 ADC / GPO IC
+ROHM BD791xx ADC / GPO IC
 M:	Matti Vaittinen <[e-mail]>
 S:	Supported
+F:	drivers/iio/adc/rohm-bd79112.c
 F:	drivers/iio/adc/rohm-bd79124.c
 
 ROHM BH1745 COLOUR SENSOR
···
 F:	Documentation/devicetree/bindings/iio/light/vishay,veml6030.yaml
 F:	drivers/iio/light/veml6030.c
 
+VISHAY VEML6046X00 RGBIR COLOR SENSOR DRIVER
+M:	Andreas Klinger <[e-mail]>
+S:	Maintained
+F:	Documentation/devicetree/bindings/iio/light/vishay,veml6046x00.yaml
+F:	drivers/iio/light/veml6046x00.c
+
 VISHAY VEML6075 UVA AND UVB LIGHT SENSOR DRIVER
 M:	Javier Carrasco <[e-mail]>
 S:	Maintained
···
 F:	include/uapi/linux/fsmap.h
 
 XILINX AMS DRIVER
-M:	Anand Ashok Dumbre <[e-mail]>
+M:	Salih Erim <[e-mail]>
+M:	Conall O'Griofa <[e-mail]>
 L:	[e-mail]
 S:	Maintained
 F:	Documentation/devicetree/bindings/iio/adc/xlnx,zynqmp-ams.yaml

drivers/iio/accel/adxl345_core.c

···
 #define ADXL345_REG_TAP_AXIS_MSK	GENMASK(2, 0)
 #define ADXL345_REG_TAP_SUPPRESS_MSK	BIT(3)
 #define ADXL345_REG_TAP_SUPPRESS	BIT(3)
+#define ADXL345_POWER_CTL_INACT_MSK	(ADXL345_POWER_CTL_AUTO_SLEEP | ADXL345_POWER_CTL_LINK)
 
 #define ADXL345_TAP_Z_EN		BIT(0)
 #define ADXL345_TAP_Y_EN		BIT(1)
 #define ADXL345_TAP_X_EN		BIT(2)
+#define ADXL345_REG_TAP_SUPPRESS	BIT(3)
+
+#define ADXL345_INACT_Z_EN		BIT(0)
+#define ADXL345_INACT_Y_EN		BIT(1)
+#define ADXL345_INACT_X_EN		BIT(2)
+#define ADXL345_REG_INACT_ACDC		BIT(3)
+#define ADXL345_ACT_INACT_NO_AXIS_EN	0x00
+#define ADXL345_INACT_XYZ_EN		(ADXL345_INACT_Z_EN | ADXL345_INACT_Y_EN | ADXL345_INACT_X_EN)
+
+#define ADXL345_ACT_Z_EN		BIT(4)
+#define ADXL345_ACT_Y_EN		BIT(5)
+#define ADXL345_ACT_X_EN		BIT(6)
+#define ADXL345_REG_ACT_ACDC		BIT(7)
+#define ADXL345_ACT_XYZ_EN		(ADXL345_ACT_Z_EN | ADXL345_ACT_Y_EN | ADXL345_ACT_X_EN)
+
+#define ADXL345_COUPLING_DC		0
+#define ADXL345_COUPLING_AC		1
+#define ADXL345_REG_NO_ACDC		0x00
 
 /* single/double tap */
 enum adxl345_tap_type {
···
 	[ADXL345_TAP_TIME_LATENT] = ADXL345_REG_LATENT,
 	[ADXL345_TAP_TIME_WINDOW] = ADXL345_REG_WINDOW,
 	[ADXL345_TAP_TIME_DUR] = ADXL345_REG_DUR,
+};
+
+/* activity/inactivity */
+enum adxl345_activity_type {
+	ADXL345_ACTIVITY,
+	ADXL345_INACTIVITY,
+	ADXL345_ACTIVITY_AC,
+	ADXL345_INACTIVITY_AC,
+	ADXL345_INACTIVITY_FF,
+};
+
+static const unsigned int adxl345_act_int_reg[] = {
+	[ADXL345_ACTIVITY] = ADXL345_INT_ACTIVITY,
+	[ADXL345_INACTIVITY] = ADXL345_INT_INACTIVITY,
+	[ADXL345_ACTIVITY_AC] = ADXL345_INT_ACTIVITY,
+	[ADXL345_INACTIVITY_AC] = ADXL345_INT_INACTIVITY,
+	[ADXL345_INACTIVITY_FF] = ADXL345_INT_FREE_FALL,
+};
+
+static const unsigned int adxl345_act_thresh_reg[] = {
+	[ADXL345_ACTIVITY] = ADXL345_REG_THRESH_ACT,
+	[ADXL345_INACTIVITY] = ADXL345_REG_THRESH_INACT,
+	[ADXL345_ACTIVITY_AC] = ADXL345_REG_THRESH_ACT,
+	[ADXL345_INACTIVITY_AC] = ADXL345_REG_THRESH_INACT,
+	[ADXL345_INACTIVITY_FF] = ADXL345_REG_THRESH_FF,
+};
+
+static const unsigned int adxl345_act_acdc_msk[] = {
+	[ADXL345_ACTIVITY] = ADXL345_REG_ACT_ACDC,
+	[ADXL345_INACTIVITY] = ADXL345_REG_INACT_ACDC,
+	[ADXL345_ACTIVITY_AC] = ADXL345_REG_ACT_ACDC,
+	[ADXL345_INACTIVITY_AC] = ADXL345_REG_INACT_ACDC,
+	[ADXL345_INACTIVITY_FF] = ADXL345_REG_NO_ACDC,
 };
 
 enum adxl345_odr {
···
 	[ADXL345_16G_RANGE] = { 0, 38312 },
 };
 
+/* scaling */
+static const int adxl345_range_factor_tbl[] = {
+	[ADXL345_2G_RANGE]  = 1,
+	[ADXL345_4G_RANGE]  = 2,
+	[ADXL345_8G_RANGE]  = 4,
+	[ADXL345_16G_RANGE] = 8,
+};
+
 struct adxl345_state {
 	const struct adxl345_chip_info *info;
 	struct regmap *regmap;
 	bool fifo_delay; /* delay: delay is needed for SPI */
 	u8 watermark;
 	u8 fifo_mode;
+
+	u8 inact_threshold;
+	u32 inact_time_ms;
 
 	u32 tap_duration_us;
 	u32 tap_latent_us;
···
 };
 
 static const struct iio_event_spec adxl345_events[] = {
+	{
+		/* activity */
+		.type = IIO_EV_TYPE_MAG,
+		.dir = IIO_EV_DIR_RISING,
+		.mask_shared_by_type =
+			BIT(IIO_EV_INFO_ENABLE) |
+			BIT(IIO_EV_INFO_VALUE),
+	},
+	{
+		/* activity, ac bit set */
+		.type = IIO_EV_TYPE_MAG_ADAPTIVE,
+		.dir = IIO_EV_DIR_RISING,
+		.mask_shared_by_type =
+			BIT(IIO_EV_INFO_ENABLE) |
+			BIT(IIO_EV_INFO_VALUE),
+	},
 	{
 		/* single tap */
 		.type = IIO_EV_TYPE_GESTURE,
···
 	chan_x, chan_y, chan_z,
 };
 
+static const struct iio_event_spec adxl345_fake_chan_events[] = {
+	{
+		/* inactivity */
+		.type = IIO_EV_TYPE_MAG,
+		.dir = IIO_EV_DIR_FALLING,
+		.mask_separate = BIT(IIO_EV_INFO_ENABLE),
+		.mask_shared_by_type =
+			BIT(IIO_EV_INFO_VALUE) |
+			BIT(IIO_EV_INFO_PERIOD),
+	},
+	{
+		/* inactivity, AC bit set */
+		.type = IIO_EV_TYPE_MAG_ADAPTIVE,
+		.dir = IIO_EV_DIR_FALLING,
+		.mask_separate = BIT(IIO_EV_INFO_ENABLE),
+		.mask_shared_by_type =
+			BIT(IIO_EV_INFO_VALUE) |
+			BIT(IIO_EV_INFO_PERIOD),
+	},
+};
+
 static const struct iio_chan_spec adxl345_channels[] = {
 	ADXL345_CHANNEL(0, chan_x, X),
 	ADXL345_CHANNEL(1, chan_y, Y),
 	ADXL345_CHANNEL(2, chan_z, Z),
+	{
+		.type = IIO_ACCEL,
+		.modified = 1,
+		.channel2 = IIO_MOD_X_AND_Y_AND_Z,
+		.scan_index = -1, /* Fake channel */
+		.event_spec = adxl345_fake_chan_events,
+		.num_event_specs = ARRAY_SIZE(adxl345_fake_chan_events),
+	},
 };
 
 static const unsigned long adxl345_scan_masks[] = {
···
 {
 	return regmap_assign_bits(st->regmap, ADXL345_REG_POWER_CTL,
 				  ADXL345_POWER_CTL_MEASURE, en);
+}
+
+/* activity / inactivity */
+
+static int adxl345_set_inact_threshold(struct adxl345_state *st,
+				       unsigned int threshold)
+{
+	int ret;
+
+	st->inact_threshold = min(U8_MAX, threshold);
+
+	ret = regmap_write(st->regmap,
+			   adxl345_act_thresh_reg[ADXL345_INACTIVITY],
+			   st->inact_threshold);
+	if (ret)
+		return ret;
+
+	return regmap_write(st->regmap,
+			    adxl345_act_thresh_reg[ADXL345_INACTIVITY_FF],
+			    st->inact_threshold);
+}
+
+static int adxl345_set_default_time(struct adxl345_state *st)
+{
+	int max_boundary = U8_MAX;
+	int min_boundary = 10;
+	enum adxl345_odr odr;
+	unsigned int regval;
+	unsigned int val;
+	int ret;
+
+	/* Generated inactivity time based on ODR */
+	ret = regmap_read(st->regmap, ADXL345_REG_BW_RATE, &regval);
+	if (ret)
+		return ret;
+
+	odr = FIELD_GET(ADXL345_BW_RATE_MSK, regval);
+	val = clamp(max_boundary - adxl345_odr_tbl[odr][0],
+		    min_boundary, max_boundary);
+	st->inact_time_ms = MILLI * val;
+
+	/* Inactivity time in s */
+	return regmap_write(st->regmap, ADXL345_REG_TIME_INACT, val);
+}
+
+static int adxl345_set_inactivity_time(struct adxl345_state *st, u32 val_int)
+{
+	st->inact_time_ms = MILLI * val_int;
+
+	return regmap_write(st->regmap, ADXL345_REG_TIME_INACT, val_int);
+}
+
+static int adxl345_set_freefall_time(struct adxl345_state *st, u32 val_fract)
+{
+	/*
+	 * Datasheet max. value is 255 * 5000 us = 1.275000 seconds.
+	 *
+	 * Recommended values between 100ms and 350ms (0x14 to 0x46)
+	 */
+	st->inact_time_ms = DIV_ROUND_UP(val_fract, MILLI);
+
+	return regmap_write(st->regmap, ADXL345_REG_TIME_FF,
+			    DIV_ROUND_CLOSEST(val_fract, 5));
+}
+
+/**
+ * adxl345_set_inact_time - Configure inactivity time explicitly or by ODR.
+ * @st: The sensor state instance.
+ * @val_int: The inactivity time, integer part.
+ * @val_fract: The inactivity time, fractional part when val_int is 0.
+ *
+ * Inactivity time can be configured between 1 and 255 seconds. If a user sets
+ * val_s to 0, a default inactivity time is calculated automatically (since 0 is
+ * also invalid and undefined by the sensor).
+ *
+ * In such cases, power consumption should be considered: the inactivity period
+ * should be shorter at higher sampling frequencies and longer at lower ones.
+ * Specifically, for frequencies above 255 Hz, the default is set to 10 seconds;
+ * for frequencies below 10 Hz, it defaults to 255 seconds.
+ *
+ * The calculation method subtracts the integer part of the configured sample
+ * frequency from 255 to estimate the inactivity time in seconds. Sub-Hertz
+ * values are ignored in this approximation. Since the recommended output data
+ * rates (ODRs) for features like activity/inactivity detection, sleep modes,
+ * and free fall range between 12.5 Hz and 400 Hz, frequencies outside this
+ * range will either use the defined boundary defaults or require explicit
+ * configuration via val_s.
+ *
+ * Return: 0 or error value.
+ */
+static int adxl345_set_inact_time(struct adxl345_state *st, u32 val_int,
+				  u32 val_fract)
+{
+	if (val_int > 0) {
+		/* Time >= 1s, inactivity */
+		return adxl345_set_inactivity_time(st, val_int);
+	} else if (val_int == 0) {
+		if (val_fract > 0) {
+			/* Time < 1s, free-fall */
+			return adxl345_set_freefall_time(st, val_fract);
+		} else if (val_fract == 0) {
+			/* Time == 0.0s */
+			return adxl345_set_default_time(st);
+		}
+	}
+
+	/* Do not support negative or wrong input. */
+	return -EINVAL;
+}
+
+/**
+ * adxl345_is_act_inact_ac() - Verify if AC or DC coupling is currently enabled.
+ *
+ * @st: The device data.
+ * @type: The activity or inactivity type.
+ *
+ * Given a type of activity / inactivity combined with either AC coupling set or
+ * default to DC, this function verifies if the combination is currently
+ * configured, hence enabled or not.
+ *
+ * Return: true if configured coupling matches the provided type, else a negative
+ *         error value.
+ */
+static int adxl345_is_act_inact_ac(struct adxl345_state *st,
+				   enum adxl345_activity_type type)
+{
+	unsigned int regval;
+	bool coupling;
+	int ret;
+
+	if (type == ADXL345_INACTIVITY_FF)
+		return true;
+
+	ret = regmap_read(st->regmap, ADXL345_REG_ACT_INACT_CTRL, &regval);
+	if (ret)
+		return ret;
+
+	coupling = adxl345_act_acdc_msk[type] & regval;
+
+	switch (type) {
+	case ADXL345_ACTIVITY:
+	case ADXL345_INACTIVITY:
+		return coupling == ADXL345_COUPLING_DC;
+	case ADXL345_ACTIVITY_AC:
+	case ADXL345_INACTIVITY_AC:
+		return coupling == ADXL345_COUPLING_AC;
+	default:
+		return -EINVAL;
+	}
+}
+
+/**
+ * adxl345_set_act_inact_ac() - Configure AC coupling or DC coupling.
+ *
+ * @st: The device data.
+ * @type: Provide a type of activity or inactivity.
+ * @cmd_en: enable or disable AC coupling.
+ *
+ * Enables AC coupling or DC coupling depending on the provided type argument.
+ * Note: Activity and inactivity can be either AC coupled or DC coupled not
+ * both at the same time.
+ *
+ * Return: 0 if successful, else error value.
+ */
+static int adxl345_set_act_inact_ac(struct adxl345_state *st,
+				    enum adxl345_activity_type type,
+				    bool cmd_en)
+{
+	unsigned int act_inact_ac;
+
+	if (type == ADXL345_ACTIVITY_AC || type == ADXL345_INACTIVITY_AC)
+		act_inact_ac = ADXL345_COUPLING_AC && cmd_en;
+	else
+		act_inact_ac = ADXL345_COUPLING_DC && cmd_en;
+
+	/*
+	 * A setting of false selects dc-coupled operation, and a setting of
+	 * true enables ac-coupled operation. In dc-coupled operation, the
+	 * current acceleration magnitude is compared directly with
+	 * ADXL345_REG_THRESH_ACT and ADXL345_REG_THRESH_INACT to determine
+	 * whether activity or inactivity is detected.
+	 *
+	 * In ac-coupled operation for activity detection, the acceleration
+	 * value at the start of activity detection is taken as a reference
+	 * value. New samples of acceleration are then compared to this
+	 * reference value, and if the magnitude of the difference exceeds the
+	 * ADXL345_REG_THRESH_ACT value, the device triggers an activity
+	 * interrupt.
+	 *
+	 * Similarly, in ac-coupled operation for inactivity detection, a
+	 * reference value is used for comparison and is updated whenever the
+	 * device exceeds the inactivity threshold. After the reference value
+	 * is selected, the device compares the magnitude of the difference
+	 * between the reference value and the current acceleration with
+	 * ADXL345_REG_THRESH_INACT. If the difference is less than the value in
+	 * ADXL345_REG_THRESH_INACT for the time in ADXL345_REG_TIME_INACT, the
+	 * device is considered inactive and the inactivity interrupt is
+	 * triggered. [quoted from p. 24, ADXL345 datasheet Rev. G]
+	 *
+	 * In a conclusion, the first acceleration snapshot sample which hit the
+	 * threshold in a particular direction is always taken as acceleration
+	 * reference value to that direction. Since for the hardware activity
+	 * and inactivity depend on the x/y/z axis, so do ac and dc coupling.
+	 * Note, this sw driver always enables or disables all three x/y/z axis
+	 * for detection via act_axis_ctrl and inact_axis_ctrl, respectively.
+	 * Where in dc-coupling samples are compared against the thresholds, in
+	 * ac-coupling measurement difference to the first acceleration
+	 * reference value are compared against the threshold. So, ac-coupling
+	 * allows for a bit more dynamic compensation depending on the initial
+	 * sample.
+	 */
+	return regmap_assign_bits(st->regmap, ADXL345_REG_ACT_INACT_CTRL,
+				  adxl345_act_acdc_msk[type], act_inact_ac);
+}
+
+static int adxl345_is_act_inact_en(struct adxl345_state *st,
+				   enum adxl345_activity_type type)
+{
+	unsigned int axis_ctrl;
+	unsigned int regval;
+	bool int_en, en;
+	int ret;
+
+	ret = regmap_read(st->regmap, ADXL345_REG_ACT_INACT_CTRL, &axis_ctrl);
+	if (ret)
+		return ret;
+
+	/* Check if axis for activity are enabled */
+	switch (type) {
+	case ADXL345_ACTIVITY:
+	case ADXL345_ACTIVITY_AC:
+		en = FIELD_GET(ADXL345_ACT_XYZ_EN, axis_ctrl);
+		if (!en)
+			return false;
+		break;
+	case ADXL345_INACTIVITY:
+	case ADXL345_INACTIVITY_AC:
+		en = FIELD_GET(ADXL345_INACT_XYZ_EN, axis_ctrl);
+		if (!en)
+			return false;
+		break;
+	case ADXL345_INACTIVITY_FF:
+		en = true;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	/* Check if specific interrupt is enabled */
+	ret = regmap_read(st->regmap, ADXL345_REG_INT_ENABLE, &regval);
+	if (ret)
+		return ret;
+
+	int_en = adxl345_act_int_reg[type] & regval;
+	if (!int_en)
+		return false;
+
+	/* Check if configured coupling matches provided type */
+	return adxl345_is_act_inact_ac(st, type);
+}
+
+static int adxl345_set_act_inact_linkbit(struct adxl345_state *st,
+					 enum adxl345_activity_type type,
+					 bool en)
+{
+	int act_ac_en, inact_ac_en;
+	int act_en, inact_en;
+
+	act_en = adxl345_is_act_inact_en(st, ADXL345_ACTIVITY);
+	if (act_en < 0)
+		return act_en;
+
+	act_ac_en = adxl345_is_act_inact_en(st, ADXL345_ACTIVITY_AC);
+	if (act_ac_en < 0)
+		return act_ac_en;
+
+	if (type == ADXL345_INACTIVITY_FF) {
+		inact_en = false;
+	} else {
+		inact_en = adxl345_is_act_inact_en(st, ADXL345_INACTIVITY);
+		if (inact_en < 0)
+			return inact_en;
+
+		inact_ac_en = adxl345_is_act_inact_en(st, ADXL345_INACTIVITY_AC);
+		if (inact_ac_en < 0)
+			return inact_ac_en;
+
+		inact_en = inact_en || inact_ac_en;
+	}
+
+	act_en = act_en || act_ac_en;
+
+	return regmap_assign_bits(st->regmap, ADXL345_REG_POWER_CTL,
+				  ADXL345_POWER_CTL_INACT_MSK,
+				  en && act_en && inact_en);
+}
+
+static int adxl345_set_act_inact_en(struct adxl345_state *st,
+				    enum adxl345_activity_type type,
+				    bool cmd_en)
+{
+	unsigned int axis_ctrl;
+	unsigned int threshold;
+	unsigned int period;
+	int ret;
+
+	if (cmd_en) {
+		/* When turning on, check if threshold is valid */
+		if (type == ADXL345_ACTIVITY || type == ADXL345_ACTIVITY_AC) {
+			ret = regmap_read(st->regmap,
+					  adxl345_act_thresh_reg[type],
+					  &threshold);
+			if (ret)
+				return ret;
+		} else {
+			threshold = st->inact_threshold;
+		}
+
+		if (!threshold) /* Just ignore the command if threshold is 0 */
+			return 0;
+
+		/* When turning on inactivity, check if inact time is valid */
+		if (type == ADXL345_INACTIVITY || type == ADXL345_INACTIVITY_AC) {
+			ret = regmap_read(st->regmap,
+					  ADXL345_REG_TIME_INACT,
+					  &period);
+			if (ret)
+				return ret;
+
+			if (!period)
+				return 0;
+		}
+	} else {
+		/*
+		 * When turning off an activity, ensure that the correct
+		 * coupling event is specified. This step helps prevent misuse -
+		 * for example, if an AC-coupled activity is active and the
+		 * current call attempts to turn off a DC-coupled activity, this
+		 * inconsistency should be detected here.
+		 */
+		if (adxl345_is_act_inact_ac(st, type) <= 0)
+			return 0;
+	}
+
+	/* Start modifying configuration registers */
+	ret = adxl345_set_measure_en(st, false);
+	if (ret)
+		return ret;
+
+	/* Enable axis according to the command */
+	switch (type) {
+	case ADXL345_ACTIVITY:
+	case ADXL345_ACTIVITY_AC:
+		axis_ctrl = ADXL345_ACT_XYZ_EN;
+		break;
+	case ADXL345_INACTIVITY:
+	case ADXL345_INACTIVITY_AC:
+		axis_ctrl = ADXL345_INACT_XYZ_EN;
+		break;
+	case ADXL345_INACTIVITY_FF:
+		axis_ctrl = ADXL345_ACT_INACT_NO_AXIS_EN;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	ret = regmap_assign_bits(st->regmap, ADXL345_REG_ACT_INACT_CTRL,
+				 axis_ctrl, cmd_en);
+	if (ret)
+		return ret;
+
+	/* Update AC/DC-coupling according to the command */
+	ret = adxl345_set_act_inact_ac(st, type, cmd_en);
+	if (ret)
+		return ret;
+
+	/* Enable the interrupt line, according to the command */
+	ret = regmap_assign_bits(st->regmap, ADXL345_REG_INT_ENABLE,
+				 adxl345_act_int_reg[type], cmd_en);
+	if (ret)
+		return ret;
+
+	/* Set link-bit and auto-sleep only when ACT and INACT are enabled */
+	ret = adxl345_set_act_inact_linkbit(st, type, cmd_en);
+	if (ret)
+		return ret;
+
+	return adxl345_set_measure_en(st, true);
 }
 
 /* tap */
···
 	 * Generally suppress detection of spikes during the latency period as
 	 * double taps here, this is fully optional for double tap detection
 	 */
-	ret = regmap_update_bits(st->regmap, ADXL345_REG_TAP_AXIS,
-				 ADXL345_REG_TAP_SUPPRESS_MSK,
-				 en ? ADXL345_REG_TAP_SUPPRESS : 0x00);
+	ret = regmap_assign_bits(st->regmap, ADXL345_REG_TAP_AXIS,
+				 ADXL345_REG_TAP_SUPPRESS, en);
 	if (ret)
 		return ret;
 
···
 
 static int adxl345_set_odr(struct adxl345_state *st, enum adxl345_odr odr)
 {
-	return regmap_update_bits(st->regmap, ADXL345_REG_BW_RATE,
+	int ret;
+
+	ret = regmap_update_bits(st->regmap, ADXL345_REG_BW_RATE,
 				 ADXL345_BW_RATE_MSK,
 				 FIELD_PREP(ADXL345_BW_RATE_MSK, odr));
+	if (ret)
+		return ret;
+
+	/* update inactivity time by ODR */
+	return adxl345_set_inact_time(st, 0, 0);
 }
 
 static int adxl345_find_range(struct adxl345_state *st, int val, int val2,
···
 
 static int adxl345_set_range(struct adxl345_state *st, enum adxl345_range range)
 {
-	return regmap_update_bits(st->regmap, ADXL345_REG_DATA_FORMAT,
+	unsigned int act_threshold, inact_threshold;
+	unsigned int range_old;
+	unsigned int regval;
+	int ret;
+
+	ret = regmap_read(st->regmap, ADXL345_REG_DATA_FORMAT, &regval);
+	if (ret)
+		return ret;
+	range_old = FIELD_GET(ADXL345_DATA_FORMAT_RANGE, regval);
+
+	ret = regmap_read(st->regmap,
+			  adxl345_act_thresh_reg[ADXL345_ACTIVITY],
+			  &act_threshold);
+	if (ret)
+		return ret;
+
+	ret = regmap_update_bits(st->regmap, ADXL345_REG_DATA_FORMAT,
 				 ADXL345_DATA_FORMAT_RANGE,
 				 FIELD_PREP(ADXL345_DATA_FORMAT_RANGE, range));
+	if (ret)
+		return ret;
+
+	act_threshold = act_threshold * adxl345_range_factor_tbl[range_old]
+		/ adxl345_range_factor_tbl[range];
+	act_threshold = min(U8_MAX, max(1, act_threshold));
+
+	inact_threshold = st->inact_threshold;
+	inact_threshold = inact_threshold * adxl345_range_factor_tbl[range_old]
+		/ adxl345_range_factor_tbl[range];
+	inact_threshold = min(U8_MAX, max(1, inact_threshold));
+
+	ret = regmap_write(st->regmap, adxl345_act_thresh_reg[ADXL345_ACTIVITY],
+			   act_threshold);
+	if (ret)
+		return ret;
+
+	return adxl345_set_inact_threshold(st, inact_threshold);
 }
 
 static int adxl345_read_avail(struct iio_dev *indio_dev,
···
 	return adxl345_set_measure_en(st, true);
 }
 
+static int adxl345_read_mag_config(struct adxl345_state *st,
+				   enum iio_event_direction dir,
+				   enum adxl345_activity_type type_act,
+				   enum adxl345_activity_type type_inact)
+{
+	switch (dir) {
+	case IIO_EV_DIR_RISING:
+		return !!adxl345_is_act_inact_en(st, type_act);
+	case IIO_EV_DIR_FALLING:
+		return !!adxl345_is_act_inact_en(st, type_inact);
+	default:
+		return -EINVAL;
+	}
+}
+
+static int adxl345_write_mag_config(struct adxl345_state *st,
+				    enum iio_event_direction dir,
+				    enum adxl345_activity_type type_act,
+				    enum adxl345_activity_type type_inact,
+				    bool state)
+{
+	switch (dir) {
+	case IIO_EV_DIR_RISING:
+		return adxl345_set_act_inact_en(st, type_act, state);
+	case IIO_EV_DIR_FALLING:
+		return adxl345_set_act_inact_en(st, type_inact, state);
+	default:
+		return -EINVAL;
+	}
+}
+
 static int adxl345_read_event_config(struct iio_dev *indio_dev,
 				     const struct iio_chan_spec *chan,
 				     enum iio_event_type type,
···
 	int ret;
 
 	switch (type) {
+	case IIO_EV_TYPE_MAG:
+		return adxl345_read_mag_config(st, dir,
+					       ADXL345_ACTIVITY,
+					       ADXL345_INACTIVITY);
+	case IIO_EV_TYPE_MAG_ADAPTIVE:
+		return adxl345_read_mag_config(st, dir,
+					       ADXL345_ACTIVITY_AC,
+					       ADXL345_INACTIVITY_AC);
 	case IIO_EV_TYPE_GESTURE:
 		switch (dir) {
 		case IIO_EV_DIR_SINGLETAP:
···
 	struct adxl345_state *st = iio_priv(indio_dev);
 
 	switch (type) {
+	case IIO_EV_TYPE_MAG:
+		return adxl345_write_mag_config(st, dir,
+						ADXL345_ACTIVITY,
+						ADXL345_INACTIVITY,
+						state);
+	case IIO_EV_TYPE_MAG_ADAPTIVE:
+		return adxl345_write_mag_config(st, dir,
+						ADXL345_ACTIVITY_AC,
+						ADXL345_INACTIVITY_AC,
+						state);
 	case IIO_EV_TYPE_GESTURE:
 		switch (dir) {
 		case IIO_EV_DIR_SINGLETAP:
···
 		default:
 			return -EINVAL;
 		}
+	default:
+		return -EINVAL;
+	}
+}
+
+static int adxl345_read_mag_value(struct adxl345_state *st,
+				  enum iio_event_direction dir,
+				  enum iio_event_info info,
+				  enum adxl345_activity_type type_act,
+				  enum adxl345_activity_type type_inact,
+				  int *val, int *val2)
+{
+	unsigned int threshold;
+	int ret;
+
+	switch (info) {
+	case IIO_EV_INFO_VALUE:
+		switch (dir) {
+		case IIO_EV_DIR_RISING:
+			ret = regmap_read(st->regmap,
+					  adxl345_act_thresh_reg[type_act],
+					  &threshold);
+			if (ret)
+				return ret;
+			*val = 62500 * threshold;
+			*val2 = MICRO;
+			return IIO_VAL_FRACTIONAL;
+		case IIO_EV_DIR_FALLING:
+			*val = 62500 * st->inact_threshold;
+			*val2 = MICRO;
+			return IIO_VAL_FRACTIONAL;
+		default:
+			return -EINVAL;
+		}
+	case IIO_EV_INFO_PERIOD:
+		*val = st->inact_time_ms;
+		*val2 = MILLI;
+		return IIO_VAL_FRACTIONAL;
+	default:
+		return -EINVAL;
+	}
+}
+
+static int adxl345_write_mag_value(struct adxl345_state *st,
+				   enum iio_event_direction dir,
+				   enum iio_event_info info,
+				   enum adxl345_activity_type type_act,
+				   enum adxl345_activity_type type_inact,
+				   int val, int val2)
+{
+	switch (info) {
+	case IIO_EV_INFO_VALUE:
+		/* Scaling factor 62.5mg/LSB, i.e. ~16g corresponds to 0xff */
+		val = DIV_ROUND_CLOSEST(val * MICRO + val2, 62500);
+		switch (dir) {
+		case IIO_EV_DIR_RISING:
+			return regmap_write(st->regmap,
+					    adxl345_act_thresh_reg[type_act],
+					    val);
+		case IIO_EV_DIR_FALLING:
+			return adxl345_set_inact_threshold(st, val);
+		default:
+			return -EINVAL;
+		}
+	case IIO_EV_INFO_PERIOD:
+		return adxl345_set_inact_time(st, val, val2);
 	default:
 		return -EINVAL;
 	}
···
 	int ret;
 
 	switch (type) {
+	case IIO_EV_TYPE_MAG:
+		return adxl345_read_mag_value(st, dir, info,
+					      ADXL345_ACTIVITY,
+					      ADXL345_INACTIVITY,
+					      val, val2);
+	case IIO_EV_TYPE_MAG_ADAPTIVE:
+		return adxl345_read_mag_value(st, dir, info,
+					      ADXL345_ACTIVITY_AC,
+					      ADXL345_INACTIVITY_AC,
+					      val, val2);
 	case IIO_EV_TYPE_GESTURE:
 		switch (info) {
 		case IIO_EV_INFO_VALUE:
···
 		return ret;
 
 	switch (type) {
+	case IIO_EV_TYPE_MAG:
+		ret = adxl345_write_mag_value(st, dir, info,
+					      ADXL345_ACTIVITY,
+					      ADXL345_INACTIVITY,
+					      val, val2);
+		if (ret)
+			return ret;
+		break;
+	case IIO_EV_TYPE_MAG_ADAPTIVE:
+		ret = adxl345_write_mag_value(st, dir, info,
+					      ADXL345_ACTIVITY_AC,
+					      ADXL345_INACTIVITY_AC,
+					      val, val2);
+		if (ret)
+			return ret;
+		break;
 	case IIO_EV_TYPE_GESTURE:
 		switch (info) {
 		case IIO_EV_INFO_VALUE:
···
 }
 
 static int adxl345_push_event(struct iio_dev *indio_dev, int int_stat,
+			      enum iio_modifier act_dir,
 			      enum iio_modifier tap_dir)
 {
 	s64 ts = iio_get_time_ns(indio_dev);
 	struct adxl345_state *st = iio_priv(indio_dev);
+	unsigned int regval;
 	int samples;
 	int ret = -ENOENT;
 
···
 				     IIO_MOD_EVENT_CODE(IIO_ACCEL, 0, tap_dir,
 							IIO_EV_TYPE_GESTURE,
 							IIO_EV_DIR_DOUBLETAP),
+				     ts);
+		if (ret)
+			return ret;
+	}
+
+	if (FIELD_GET(ADXL345_INT_ACTIVITY, int_stat)) {
+		ret = regmap_read(st->regmap, ADXL345_REG_ACT_INACT_CTRL, &regval);
+		if (ret)
+			return ret;
+
+		if (FIELD_GET(ADXL345_REG_ACT_ACDC, regval)) {
+			/* AC coupled */
+			ret = iio_push_event(indio_dev,
+					     IIO_MOD_EVENT_CODE(IIO_ACCEL, 0, act_dir,
+								IIO_EV_TYPE_MAG_ADAPTIVE,
+								IIO_EV_DIR_RISING),
+					     ts);
+
+		} else {
+			/* DC coupled, relying on THRESH */
+			ret = iio_push_event(indio_dev,
+					     IIO_MOD_EVENT_CODE(IIO_ACCEL, 0, act_dir,
+								IIO_EV_TYPE_MAG,
+								IIO_EV_DIR_RISING),
+					     ts);
+		}
+		if (ret)
+			return ret;
+	}
+
+	if (FIELD_GET(ADXL345_INT_INACTIVITY, int_stat)) {
+		ret = regmap_read(st->regmap, ADXL345_REG_ACT_INACT_CTRL, &regval);
+		if (ret)
+			return ret;
+
+		if (FIELD_GET(ADXL345_REG_INACT_ACDC, regval)) {
+			/* AC coupled */
+			ret = iio_push_event(indio_dev,
+					     IIO_MOD_EVENT_CODE(IIO_ACCEL, 0,
+								IIO_MOD_X_AND_Y_AND_Z,
+								IIO_EV_TYPE_MAG_ADAPTIVE,
+								IIO_EV_DIR_FALLING),
+					     ts);
+		} else {
+			/* DC coupled, relying on THRESH */
+			ret = iio_push_event(indio_dev,
+					     IIO_MOD_EVENT_CODE(IIO_ACCEL, 0,
+								IIO_MOD_X_AND_Y_AND_Z,
+								IIO_EV_TYPE_MAG,
+								IIO_EV_DIR_FALLING),
+					     ts);
+		}
+		if (ret)
+			return ret;
+	}
+
+	if (FIELD_GET(ADXL345_INT_FREE_FALL, int_stat)) {
+		ret = iio_push_event(indio_dev,
+				     IIO_MOD_EVENT_CODE(IIO_ACCEL, 0,
+							IIO_MOD_X_AND_Y_AND_Z,
+							IIO_EV_TYPE_MAG,
+							IIO_EV_DIR_FALLING),
 				     ts);
 		if (ret)
 			return ret;
···
 	struct adxl345_state *st = iio_priv(indio_dev);
 	unsigned int regval;
 	enum iio_modifier tap_dir = IIO_NO_MOD;
+	enum iio_modifier act_dir = IIO_NO_MOD;
 	u32 axis_ctrl;
 	int int_stat;
 	int ret;
···
 	if (ret)
 		return IRQ_NONE;
 
-	if (FIELD_GET(ADXL345_REG_TAP_AXIS_MSK, axis_ctrl)) {
+	if (FIELD_GET(ADXL345_REG_TAP_AXIS_MSK, axis_ctrl) ||
+	    FIELD_GET(ADXL345_ACT_XYZ_EN, axis_ctrl)) {
 		ret = regmap_read(st->regmap, ADXL345_REG_ACT_TAP_STATUS, &regval);
 		if (ret)
 			return IRQ_NONE;
···
 			tap_dir = IIO_MOD_Y;
 		else if (FIELD_GET(ADXL345_TAP_X_EN, regval))
 			tap_dir = IIO_MOD_X;
+
+		if (FIELD_GET(ADXL345_ACT_Z_EN, regval))
+			act_dir = IIO_MOD_Z;
+		else if (FIELD_GET(ADXL345_ACT_Y_EN, regval))
+			act_dir = IIO_MOD_Y;
+		else if (FIELD_GET(ADXL345_ACT_X_EN, regval))
+			act_dir = IIO_MOD_X;
 	}
 
 	if (regmap_read(st->regmap, ADXL345_REG_INT_SOURCE, &int_stat))
 		return IRQ_NONE;
 
-	if (adxl345_push_event(indio_dev, int_stat, tap_dir))
+	if (adxl345_push_event(indio_dev, int_stat, act_dir, tap_dir))
 		goto err;
 
 	if (FIELD_GET(ADXL345_INT_OVERRUN, int_stat))
···
 		 */
 		ret = regmap_assign_bits(st->regmap, ADXL345_REG_INT_MAP,
 					 U8_MAX, intio);
+		if (ret)
+			return ret;
+
+		/*
+		 * Initialized with sensible default values to streamline
+		 * sensor operation. These defaults are partly derived from
+		 * the previous input driver for the ADXL345 and partly
+		 * based on the recommendations provided in the datasheet.
+		 */
+		ret = regmap_write(st->regmap, ADXL345_REG_ACT_INACT_CTRL, 0);
+		if (ret)
+			return ret;
+
+		ret = regmap_write(st->regmap, ADXL345_REG_THRESH_ACT, 6);
+		if (ret)
+			return ret;
+
+		ret = adxl345_set_inact_threshold(st, 4);
 		if (ret)
 			return ret;
 

drivers/iio/accel/bma180.c

···
 	int scale;
 	int bw;
 	bool pmode;
-	/* Ensure timestamp is naturally aligned */
-	struct {
-		s16 chan[4];
-		aligned_s64 timestamp;
-	} scan;
 };
 
 enum bma180_chan {
···
 	struct bma180_data *data = iio_priv(indio_dev);
 	s64 time_ns = iio_get_time_ns(indio_dev);
 	int bit, ret, i = 0;
+	struct {
+		s16 chan[4];
+		aligned_s64 timestamp;
+	} scan = { };
 
 	mutex_lock(&data->mutex);
 
···
 			mutex_unlock(&data->mutex);
 			goto err;
 		}
-		data->scan.chan[i++] = ret;
+		scan.chan[i++] = ret;
 	}
 
 	mutex_unlock(&data->mutex);
 
-	iio_push_to_buffers_with_ts(indio_dev, &data->scan, sizeof(data->scan), time_ns);
+	iio_push_to_buffers_with_ts(indio_dev, &scan, sizeof(scan), time_ns);
 err:
 	iio_trigger_notify_done(indio_dev->trig);
 

drivers/iio/accel/bma220_spi.c

···
 	struct bma220_data *data;
 
 	indio_dev = devm_iio_device_alloc(&spi->dev, sizeof(*data));
-	if (!indio_dev) {
-		dev_err(&spi->dev, "iio allocation failed!\n");
+	if (!indio_dev)
 		return -ENOMEM;
-	}
 
 	data = iio_priv(indio_dev);
 	data->spi_device = spi;

drivers/iio/accel/bmc150-accel-core.c

···
 	struct device *dev = regmap_get_device(data->regmap);
 	int ret;
 
-	if (on) {
+	if (on)
 		ret = pm_runtime_resume_and_get(dev);
-	} else {
-		pm_runtime_mark_last_busy(dev);
+	else
 		ret = pm_runtime_put_autosuspend(dev);
-	}
-
 	if (ret < 0) {
 		dev_err(dev,
 			"Failed: %s for %d\n", __func__, on);

drivers/iio/accel/bmi088-accel-core.c

···
 	return -EINVAL;
 
 out_read_raw_pm_put:
-	pm_runtime_mark_last_busy(dev);
 	pm_runtime_put_autosuspend(dev);
 
 	return ret;
···
 			return ret;
 
 		ret = bmi088_accel_set_scale(data, val, val2);
-		pm_runtime_mark_last_busy(dev);
 		pm_runtime_put_autosuspend(dev);
 		return ret;
 	case IIO_CHAN_INFO_SAMP_FREQ:
···
 			return ret;
 
 		ret = bmi088_accel_set_sample_freq(data, val);
-		pm_runtime_mark_last_busy(dev);
 		pm_runtime_put_autosuspend(dev);
 		return ret;
 	default:

drivers/iio/accel/dmard06.c

···
 	}
 
 	indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*dmard06));
-	if (!indio_dev) {
-		dev_err(&client->dev, "Failed to allocate iio device\n");
+	if (!indio_dev)
 		return -ENOMEM;
-	}
 
 	dmard06 = iio_priv(indio_dev);
 	dmard06->client = client;

drivers/iio/accel/dmard09.c

···
 	struct dmard09_data *data;
 
 	indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data));
-	if (!indio_dev) {
-		dev_err(&client->dev, "iio allocation failed\n");
+	if (!indio_dev)
 		return -ENOMEM;
-	}
 
 	data = iio_priv(indio_dev);
 	data->client = client;

drivers/iio/accel/dmard10.c

···
 		return (ret < 0) ? ret : -ENODEV;
 
 	indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data));
-	if (!indio_dev) {
-		dev_err(&client->dev, "iio allocation failed!\n");
+	if (!indio_dev)
 		return -ENOMEM;
-	}
 
 	data = iio_priv(indio_dev);
 	data->client = client;

drivers/iio/accel/fxls8962af-core.c

···
 	struct device *dev = regmap_get_device(data->regmap);
 	int ret;
 
-	pm_runtime_mark_last_busy(dev);
 	ret = pm_runtime_put_autosuspend(dev);
 	if (ret)
 		dev_err(dev, "failed to power off\n");

drivers/iio/accel/kxcjk-1013.c

···
 
 	if (on)
 		ret = pm_runtime_resume_and_get(&data->client->dev);
-	else {
-		pm_runtime_mark_last_busy(&data->client->dev);
+	else
 		ret = pm_runtime_put_autosuspend(&data->client->dev);
-	}
 	if (ret < 0) {
 		dev_err(&data->client->dev,
 			"Failed: %s for %d\n", __func__, on);

drivers/iio/accel/kxsd9.c

···
 		ret = kxsd9_write_scale(indio_dev, val2);
 	}
 
-	pm_runtime_mark_last_busy(st->dev);
 	pm_runtime_put_autosuspend(st->dev);
 
 	return ret;
···
 	}
 
 error_ret:
-	pm_runtime_mark_last_busy(st->dev);
 	pm_runtime_put_autosuspend(st->dev);
 
 	return ret;
···
 {
 	struct kxsd9_state *st = iio_priv(indio_dev);
 
-	pm_runtime_mark_last_busy(st->dev);
 	pm_runtime_put_autosuspend(st->dev);
 
 	return 0;

drivers/iio/accel/mc3230.c

···
 	}
 
 	indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data));
-	if (!indio_dev) {
-		dev_err(&client->dev, "iio allocation failed!\n");
+	if (!indio_dev)
 		return -ENOMEM;
-	}
 
 	data = iio_priv(indio_dev);
 	data->chip_info = chip_info;

drivers/iio/accel/mma7660.c

···
 	struct mma7660_data *data;
 
 	indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data));
-	if (!indio_dev) {
-		dev_err(&client->dev, "iio allocation failed!\n");
+	if (!indio_dev)
 		return -ENOMEM;
-	}
 
 	data = iio_priv(indio_dev);
 	data->client = client;

drivers/iio/accel/mma8452.c

···
 #ifdef CONFIG_PM
 	int ret;
 
-	if (on) {
+	if (on)
 		ret = pm_runtime_resume_and_get(&client->dev);
-	} else {
-		pm_runtime_mark_last_busy(&client->dev);
+	else
 		ret = pm_runtime_put_autosuspend(&client->dev);
-	}
-
 	if (ret < 0) {
 		dev_err(&client->dev,
 			"failed to change power state to %d\n", on);

drivers/iio/accel/mma9551_core.c

···
 
 	if (on)
 		ret = pm_runtime_resume_and_get(&client->dev);
-	else {
-		pm_runtime_mark_last_busy(&client->dev);
+	else
 		ret = pm_runtime_put_autosuspend(&client->dev);
-	}
-
 	if (ret < 0) {
 		dev_err(&client->dev,
 			"failed to change power state to %d\n", on);

drivers/iio/accel/msa311.c

···
 	err = msa311_get_axis(msa311, chan, &axis);
 	mutex_unlock(&msa311->lock);
 
-	pm_runtime_mark_last_busy(dev);
 	pm_runtime_put_autosuspend(dev);
 
 	iio_device_release_direct(indio_dev);
···
 			break;
 		}
 
-	pm_runtime_mark_last_busy(dev);
 	pm_runtime_put_autosuspend(dev);
 
 	if (err)
···
 			break;
 		}
 
-	pm_runtime_mark_last_busy(dev);
 	pm_runtime_put_autosuspend(dev);
 
 	iio_device_release_direct(indio_dev);
···
 
 	mutex_unlock(&msa311->lock);
 
-	pm_runtime_mark_last_busy(dev);
 	pm_runtime_put_autosuspend(dev);
 
 	if (err)
···
 	struct msa311_priv *msa311 = iio_priv(indio_dev);
 	struct device *dev = msa311->dev;
 
-	pm_runtime_mark_last_busy(dev);
 	pm_runtime_put_autosuspend(dev);
 
 	return 0;
···
 	msa311->chip_name = devm_kasprintf(dev, GFP_KERNEL,
 					   "msa311-%02x", partid);
 	if (!msa311->chip_name)
-		return dev_err_probe(dev, -ENOMEM, "can't alloc chip name\n");
+		return -ENOMEM;
 
 	return 0;
 }
···
 
 	trig = devm_iio_trigger_alloc(dev, "%s-new-data", msa311->chip_name);
 	if (!trig)
-		return dev_err_probe(dev, -ENOMEM,
-				     "can't allocate newdata trigger\n");
+		return -ENOMEM;
 
 	msa311->new_data_trig = trig;
 	msa311->new_data_trig->ops = &msa311_new_data_trig_ops;
···
 
 	indio_dev = devm_iio_device_alloc(dev, sizeof(*msa311));
 	if (!indio_dev)
-		return dev_err_probe(dev, -ENOMEM,
-				     "IIO device allocation failed\n");
+		return -ENOMEM;
 
 	msa311 = iio_priv(indio_dev);
 	msa311->dev = dev;
···
 	 */
 	err = devm_add_action_or_reset(dev, msa311_powerdown, msa311);
 	if (err)
-		return dev_err_probe(dev, err, "can't add powerdown action\n");
+		return err;
 
 	err = pm_runtime_set_active(dev);
 	if (err)
···
 	if (err)
 		return err;
 
-	pm_runtime_mark_last_busy(dev);
 	pm_runtime_put_autosuspend(dev);
 
 	err = devm_iio_device_register(dev, indio_dev);

drivers/iio/accel/stk8312.c

···
 	struct stk8312_data *data;
 
 	indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data));
-	if (!indio_dev) {
-		dev_err(&client->dev, "iio allocation failed!\n");
+	if (!indio_dev)
 		return -ENOMEM;
-	}
 
 	data = iio_priv(indio_dev);
 	data->client = client;

drivers/iio/accel/stk8ba50.c

···
 	struct stk8ba50_data *data;
 
 	indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data));
-	if (!indio_dev) {
-		dev_err(&client->dev, "iio allocation failed!\n");
+	if (!indio_dev)
 		return -ENOMEM;
-	}
 
 	data = iio_priv(indio_dev);
 	data->client = client;

drivers/iio/adc/88pm886-gpadc.c

···
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright 2025, Duje Mihanović <[e-mail]>
+ */
+
+#include <linux/bits.h>
+#include <linux/bug.h>
+#include <linux/delay.h>
+#include <linux/device.h>
+#include <linux/err.h>
+#include <linux/i2c.h>
+#include <linux/math.h>
+#include <linux/mod_devicetable.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/pm_runtime.h>
+#include <linux/regmap.h>
+#include <linux/types.h>
+#include <linux/units.h>
+
+#include <asm/byteorder.h>
+
+#include <linux/iio/iio.h>
+#include <linux/iio/types.h>
+
+#include <linux/mfd/88pm886.h>
+
+struct pm886_gpadc {
+	struct regmap *map;
+};
+
+enum pm886_gpadc_channel {
+	VSC_CHAN,
+	VCHG_PWR_CHAN,
+	VCF_OUT_CHAN,
+	VBAT_CHAN,
+	VBAT_SLP_CHAN,
+	VBUS_CHAN,
+
+	GPADC0_CHAN,
+	GPADC1_CHAN,
+	GPADC2_CHAN,
+	GPADC3_CHAN,
+
+	GND_DET1_CHAN,
+	GND_DET2_CHAN,
+	MIC_DET_CHAN,
+
+	TINT_CHAN,
+};
+
+static const int pm886_gpadc_regs[] = {
+	[VSC_CHAN] = PM886_REG_GPADC_VSC,
+	[VCHG_PWR_CHAN] = PM886_REG_GPADC_VCHG_PWR,
+	[VCF_OUT_CHAN] = PM886_REG_GPADC_VCF_OUT,
+	[VBAT_CHAN] = PM886_REG_GPADC_VBAT,
+	[VBAT_SLP_CHAN] = PM886_REG_GPADC_VBAT_SLP,
+	[VBUS_CHAN] = PM886_REG_GPADC_VBUS,
+
+	[GPADC0_CHAN] = PM886_REG_GPADC_GPADC0,
+	[GPADC1_CHAN] = PM886_REG_GPADC_GPADC1,
+	[GPADC2_CHAN] = PM886_REG_GPADC_GPADC2,
+	[GPADC3_CHAN] = PM886_REG_GPADC_GPADC3,
+
+	[GND_DET1_CHAN] = PM886_REG_GPADC_GND_DET1,
+	[GND_DET2_CHAN] = PM886_REG_GPADC_GND_DET2,
+	[MIC_DET_CHAN] = PM886_REG_GPADC_MIC_DET,
+
+	[TINT_CHAN] = PM886_REG_GPADC_TINT,
+};
+
+#define ADC_CHANNEL_VOLTAGE(index, lsb, name)		\
+{							\
+	.type = IIO_VOLTAGE,				\
+	.indexed = 1,					\
+	.channel = index,				\
+	.address = lsb,					\
+	.info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |	\
+			      BIT(IIO_CHAN_INFO_SCALE),	\
+	.datasheet_name = name,				\
+}
+
+#define ADC_CHANNEL_RESISTANCE(index, lsb, name)		\
+{								\
+	.type = IIO_RESISTANCE,					\
+	.indexed = 1,						\
+	.channel = index,					\
+	.address = lsb,						\
+	.info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED),	\
+	.datasheet_name = name,					\
+}
+
+#define ADC_CHANNEL_TEMPERATURE(index, lsb, name)		\
+{								\
+	.type = IIO_TEMP,					\
+	.indexed = 1,						\
+	.channel = index,					\
+	.address = lsb,						\
+	.info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |		\
+			      BIT(IIO_CHAN_INFO_SCALE) |	\
+			      BIT(IIO_CHAN_INFO_OFFSET),	\
+	.datasheet_name = name,					\
+}
+
+static const struct iio_chan_spec pm886_gpadc_channels[] = {
+	ADC_CHANNEL_VOLTAGE(VSC_CHAN, 1367, "vsc"),
+	ADC_CHANNEL_VOLTAGE(VCHG_PWR_CHAN, 1709, "vchg_pwr"),
+	ADC_CHANNEL_VOLTAGE(VCF_OUT_CHAN, 1367, "vcf_out"),
+	ADC_CHANNEL_VOLTAGE(VBAT_CHAN, 1367, "vbat"),
+	ADC_CHANNEL_VOLTAGE(VBAT_SLP_CHAN, 1367, "vbat_slp"),
+	ADC_CHANNEL_VOLTAGE(VBUS_CHAN, 1709, "vbus"),
+
+	ADC_CHANNEL_RESISTANCE(GPADC0_CHAN, 342, "gpadc0"),
+	ADC_CHANNEL_RESISTANCE(GPADC1_CHAN, 342, "gpadc1"),
+	ADC_CHANNEL_RESISTANCE(GPADC2_CHAN, 342, "gpadc2"),
+	ADC_CHANNEL_RESISTANCE(GPADC3_CHAN, 342, "gpadc3"),
+
+	ADC_CHANNEL_VOLTAGE(GND_DET1_CHAN, 342, "gnddet1"),
+	ADC_CHANNEL_VOLTAGE(GND_DET2_CHAN, 342, "gnddet2"),
+	ADC_CHANNEL_VOLTAGE(MIC_DET_CHAN, 1367, "mic_det"),
+
+	ADC_CHANNEL_TEMPERATURE(TINT_CHAN, 104, "tint"),
+};
+
+static const struct regmap_config pm886_gpadc_regmap_config = {
+	.reg_bits = 8,
+	.val_bits = 8,
+	.max_register = PM886_GPADC_MAX_REGISTER,
+};
+
+static int gpadc_get_raw(struct iio_dev *iio, enum pm886_gpadc_channel chan)
+{
+	struct pm886_gpadc *gpadc = iio_priv(iio);
+	__be16 buf;
+	int ret;
+
+	ret = regmap_bulk_read(gpadc->map, pm886_gpadc_regs[chan], &buf, sizeof(buf));
+	if (ret)
+		return ret;
+
+	return be16_to_cpu(buf) >> 4;
+}
+
+static int
+gpadc_set_bias(struct pm886_gpadc *gpadc, enum pm886_gpadc_channel chan, bool on)
+{
+	unsigned int gpadc_num = chan - GPADC0_CHAN;
+	unsigned int bits = BIT(gpadc_num + 4) | BIT(gpadc_num);
+
+	return regmap_assign_bits(gpadc->map, PM886_REG_GPADC_CONFIG(0x14), bits, on);
+}
+
+static int
+gpadc_find_bias_current(struct iio_dev *iio, struct iio_chan_spec const *chan,
+			unsigned int *raw_uV, unsigned int *raw_uA)
+{
+	struct pm886_gpadc *gpadc = iio_priv(iio);
+	unsigned int gpadc_num = chan->channel - GPADC0_CHAN;
+	unsigned int reg = PM886_REG_GPADC_CONFIG(0xb + gpadc_num);
+	unsigned long lsb = chan->address;
+	int ret;
+
+	for (unsigned int i = 0; i < PM886_GPADC_BIAS_LEVELS; i++) {
+		ret = regmap_update_bits(gpadc->map, reg, GENMASK(3, 0), i);
+		if (ret)
+			return ret;
+
+		/* Wait for the new bias level to apply. */
+		fsleep(5 * USEC_PER_MSEC);
+
+		*raw_uA = PM886_GPADC_INDEX_TO_BIAS_uA(i);
+		*raw_uV = gpadc_get_raw(iio, chan->channel) * lsb;
+
+		/*
+		 * Vendor kernel errors out above 1.25 V, but testing shows
+		 * that the resistance of the battery detection channel (GPADC2
+		 * on coreprimevelte) reaches about 1.4 MΩ when the battery is
+		 * removed, which can't be measured with such a low upper
+		 * limit. Therefore, to be able to detect the battery without
+		 * ugly externs as used in the vendor fuel gauge driver,
+		 * increase this limit a bit.
+		 */
+		if (WARN_ON(*raw_uV > 1500 * (MICRO / MILLI)))
+			return -EIO;
+
+		/*
+		 * Vendor kernel errors out under 300 mV, but for the same
+		 * reason as above (except the channel hovers around 3.5 kΩ
+		 * with battery present) reduce this limit.
+		 */
+		if (*raw_uV < 200 * (MICRO / MILLI)) {
+			dev_dbg(&iio->dev, "bad bias for chan %d: %d uA @ %d uV\n",
+				chan->channel, *raw_uA, *raw_uV);
+			continue;
+		}
+
+		dev_dbg(&iio->dev, "good bias for chan %d: %d uA @ %d uV\n",
+			chan->channel, *raw_uA, *raw_uV);
+		return 0;
+	}
+
+	dev_err(&iio->dev, "failed to find good bias for chan %d\n", chan->channel);
+	return -EINVAL;
+}
+
+static int
+gpadc_get_resistance_ohm(struct iio_dev *iio, struct iio_chan_spec const *chan)
+{
+	struct pm886_gpadc *gpadc = iio_priv(iio);
+	unsigned int raw_uV, raw_uA;
+	int ret;
+
+	ret = gpadc_set_bias(gpadc, chan->channel, true);
+	if (ret)
+		goto out;
+
+	ret = gpadc_find_bias_current(iio, chan, &raw_uV, &raw_uA);
+	if (ret)
+		goto out;
+
+	ret = DIV_ROUND_CLOSEST(raw_uV, raw_uA);
+out:
+	gpadc_set_bias(gpadc, chan->channel, false);
+	return ret;
+}
+
+static int
+__pm886_gpadc_read_raw(struct iio_dev *iio, struct iio_chan_spec const *chan,
+		       int *val, int *val2, long mask)
+{
+	unsigned long lsb = chan->address;
+
+	switch (mask) {
+	case IIO_CHAN_INFO_RAW:
+		*val = gpadc_get_raw(iio, chan->channel);
+		if (*val < 0)
+			return *val;
+
+		return IIO_VAL_INT;
+	case IIO_CHAN_INFO_SCALE:
+		*val = lsb;
+
+		if (chan->type == IIO_VOLTAGE) {
+			*val2 = MILLI;
+			return IIO_VAL_FRACTIONAL;
+		} else {
+			return IIO_VAL_INT;
+		}
+	case IIO_CHAN_INFO_OFFSET:
+		/* Raw value is 104 millikelvin/LSB, convert it to 104 millicelsius/LSB */
+		*val = ABSOLUTE_ZERO_MILLICELSIUS;
+		*val2 = lsb;
+		return IIO_VAL_FRACTIONAL;
+	case IIO_CHAN_INFO_PROCESSED:
+		*val = gpadc_get_resistance_ohm(iio, chan);
+		if (*val < 0)
+			return *val;
+
+		return IIO_VAL_INT;
+	default:
+		return -EINVAL;
+	}
+}
+
+static int pm886_gpadc_read_raw(struct iio_dev *iio, struct iio_chan_spec const *chan,
+				int *val, int *val2, long mask)
+{
+	struct device *dev = iio->dev.parent;
+	int ret;
+
+	ret = pm_runtime_resume_and_get(dev);
+	if (ret)
+		return ret;
+
+	ret = __pm886_gpadc_read_raw(iio, chan, val, val2, mask);
+
+	pm_runtime_put_autosuspend(dev);
+	return ret;
+}
+
+static int pm886_gpadc_hw_enable(struct regmap *map)
+{
+	const u8 config[] = {
+		PM886_GPADC_CONFIG1_EN_ALL,
+		PM886_GPADC_CONFIG2_EN_ALL,
+		PM886_GPADC_GND_DET2_EN,
+	};
+	int ret;
+
+	/* Enable the ADC block. */
+	ret = regmap_set_bits(map, PM886_REG_GPADC_CONFIG(0x6), BIT(0));
+	if (ret)
+		return ret;
+
+	/* Enable all channels. */
+	return regmap_bulk_write(map, PM886_REG_GPADC_CONFIG(0x1), config, ARRAY_SIZE(config));
+}
+
+static int pm886_gpadc_hw_disable(struct regmap *map)
+{
+	return regmap_clear_bits(map, PM886_REG_GPADC_CONFIG(0x6), BIT(0));
+}
+
+static const struct iio_info pm886_gpadc_iio_info = {
+	.read_raw = pm886_gpadc_read_raw,
+};
+
+static int pm886_gpadc_probe(struct platform_device *pdev)
+{
+	struct device *dev = &pdev->dev;
+	struct pm886_chip *chip = dev_get_drvdata(dev->parent);
+	struct i2c_client *client = chip->client;
+	struct pm886_gpadc *gpadc;
+	struct i2c_client *page;
+	struct iio_dev *iio;
+	int ret;
+
+	iio = devm_iio_device_alloc(dev, sizeof(*gpadc));
+	if (!iio)
+		return -ENOMEM;
+
+	gpadc = iio_priv(iio);
+	dev_set_drvdata(dev, iio);
+
+	page = devm_i2c_new_dummy_device(dev, client->adapter,
+					 client->addr + PM886_PAGE_OFFSET_GPADC);
+	if (IS_ERR(page))
+		return dev_err_probe(dev, PTR_ERR(page), "Failed to initialize GPADC page\n");
+
+	gpadc->map = devm_regmap_init_i2c(page, &pm886_gpadc_regmap_config);
+	if (IS_ERR(gpadc->map))
+		return dev_err_probe(dev, PTR_ERR(gpadc->map),
+				     "Failed to initialize GPADC regmap\n");
+
+	iio->name = "88pm886-gpadc";
+	iio->modes = INDIO_DIRECT_MODE;
+	iio->info = &pm886_gpadc_iio_info;
+	iio->channels = pm886_gpadc_channels;
+	iio->num_channels = ARRAY_SIZE(pm886_gpadc_channels);
+	device_set_node(&iio->dev, dev_fwnode(dev->parent));
+
+	ret = devm_pm_runtime_enable(dev);
+	if (ret)
+		return dev_err_probe(dev, ret, "Failed to enable runtime PM\n");
+
+	pm_runtime_set_autosuspend_delay(dev, 50);
+	pm_runtime_use_autosuspend(dev);
+	ret = devm_iio_device_register(dev, iio);
+	if (ret)
+		return dev_err_probe(dev, ret, "Failed to register ADC\n");
+
+	return 0;
+}
+
+static int pm886_gpadc_runtime_resume(struct device *dev)
+{
+	struct iio_dev *iio = dev_get_drvdata(dev);
+	struct pm886_gpadc *gpadc = iio_priv(iio);
+
+	return pm886_gpadc_hw_enable(gpadc->map);
+}
+
+static int pm886_gpadc_runtime_suspend(struct device *dev)
+{
+	struct iio_dev *iio = dev_get_drvdata(dev);
+	struct pm886_gpadc *gpadc = iio_priv(iio);
+
+	return pm886_gpadc_hw_disable(gpadc->map);
+}
+
+static DEFINE_RUNTIME_DEV_PM_OPS(pm886_gpadc_pm_ops,
+				 pm886_gpadc_runtime_suspend,
+				 pm886_gpadc_runtime_resume, NULL);
+
+static const struct platform_device_id pm886_gpadc_id[] = {
+	{ "88pm886-gpadc" },
+	{ }
+};
+MODULE_DEVICE_TABLE(platform, pm886_gpadc_id);
+
+static struct platform_driver pm886_gpadc_driver = {
+	.driver = {
+		.name = "88pm886-gpadc",
+		.pm = pm_ptr(&pm886_gpadc_pm_ops),
+	},
+	.probe = pm886_gpadc_probe,
+	.id_table = pm886_gpadc_id,
+};
+module_platform_driver(pm886_gpadc_driver);
+
+MODULE_AUTHOR("Duje Mihanović <[e-mail]>");
+MODULE_DESCRIPTION("Marvell 88PM886 GPADC driver");
+MODULE_LICENSE("GPL");

drivers/iio/adc/Kconfig

···
 config IIO_ADC_HELPER
 	tristate
 
+config 88PM886_GPADC
+	tristate "Marvell 88PM886 GPADC driver"
+	depends on MFD_88PM886_PMIC
+	default MFD_88PM886_PMIC
+	help
+	  Say Y here to enable support for the GPADC (General Purpose ADC)
+	  found on the Marvell 88PM886 PMIC. The GPADC measures various
+	  internal voltages and temperatures, including (but not limited to)
+	  system, battery and USB Vbus.
+
+	  To compile this driver as a module, choose M here: the module will be
+	  called 88pm886-gpadc.
+
 config AB8500_GPADC
 	bool "ST-Ericsson AB8500 GPADC driver"
 	depends on AB8500_CORE && REGULATOR_AB8500
···
 	depends on SPI
 	select CRC8
 	select IIO_BUFFER
+	select IIO_BACKEND
 	help
 	  Say yes here to build support for Analog Devices AD777X family
 	  (AD7770, AD7771, AD7779) analog to digital converter (ADC).
···
 
 	  To compile this driver as a module, choose M here: the module will be
 	  called ad9467.
+
+config ADE9000
+	tristate "Analog Devices ADE9000 Multiphase Energy, and Power Quality Monitoring IC Driver"
+	depends on SPI
+	select REGMAP_SPI
+	select IIO_BUFFER
+	select IIO_KFIFO_BUF
+	help
+	  Say yes here to build support for the Analog Devices ADE9000,
+	  a highly accurate, multiphase energy and power quality monitoring
+	  integrated circuit.
+
+	  The device features high-precision analog-to-digital converters
+	  and digital signal processing to compute RMS values, power factor,
+	  frequency, and harmonic analysis. It supports SPI communication
+	  and provides buffered data output through the IIO framework.
+
+	  To compile this driver as a module, choose M here: the module will
+	  be called ade9000.
 
 config ADI_AXI_ADC
 	tristate "Analog Devices Generic AXI ADC IP core driver"
···
 
 	  This driver can also be built as a module. If so, the module will be
 	  called ingenic_adc.
+
+config INTEL_DC_TI_ADC
+	tristate "Intel Bay Trail / Cherry Trail Dollar Cove TI ADC driver"
+	depends on INTEL_SOC_PMIC_CHTDC_TI
+	help
+	  Say yes here to have support for the Dollar Cove TI PMIC ADC device.
+	  Depending on platform configuration, this general purpose ADC can be
+	  used for sensors such as battery voltage and thermal resistors.
+
+	  To compile this driver as a module, choose M here: the module will be
+	  called intel_dc_ti_adc.
 
 config INTEL_MRFLD_ADC
 	tristate "Intel Merrifield Basin Cove ADC driver"
···
 
 	  This driver can also be built as a module. If so, the module
 	  will be called rn5t618-adc.
+
+config ROHM_BD79112
+	tristate "Rohm BD79112 ADC driver"
+	depends on SPI && GPIOLIB
+	select REGMAP_SPI
+	select IIO_ADC_HELPER
+	help
+	  Say yes here to build support for the ROHM BD79112 ADC. The
+	  ROHM BD79112 is a 12-bit, 32-channel, SAR ADC. Analog inputs
+	  can also be used for GPIO.
 
 config ROHM_BD79124
 	tristate "Rohm BD79124 ADC driver"

drivers/iio/adc/Makefile

···
 obj-$(CONFIG_IIO_ADC_HELPER) += industrialio-adc.o
 
 # When adding new entries keep the list in alphabetical order
+obj-$(CONFIG_88PM886_GPADC) += 88pm886-gpadc.o
 obj-$(CONFIG_AB8500_GPADC) += ab8500-gpadc.o
 obj-$(CONFIG_AD_SIGMA_DELTA) += ad_sigma_delta.o
 obj-$(CONFIG_AD4000) += ad4000.o
···
 obj-$(CONFIG_AD7949) += ad7949.o
 obj-$(CONFIG_AD799X) += ad799x.o
 obj-$(CONFIG_AD9467) += ad9467.o
+obj-$(CONFIG_ADE9000) += ade9000.o
 obj-$(CONFIG_ADI_AXI_ADC) += adi-axi-adc.o
 obj-$(CONFIG_ASPEED_ADC) += aspeed_adc.o
 obj-$(CONFIG_AT91_ADC) += at91_adc.o
···
 obj-$(CONFIG_IMX93_ADC) += imx93_adc.o
 obj-$(CONFIG_INA2XX_ADC) += ina2xx-adc.o
 obj-$(CONFIG_INGENIC_ADC) += ingenic-adc.o
+obj-$(CONFIG_INTEL_DC_TI_ADC) += intel_dc_ti_adc.o
 obj-$(CONFIG_INTEL_MRFLD_ADC) += intel_mrfld_adc.o
 obj-$(CONFIG_LP8788_ADC) += lp8788_adc.o
 obj-$(CONFIG_LPC18XX_ADC) += lpc18xx_adc.o
···
 obj-$(CONFIG_RCAR_GYRO_ADC) += rcar-gyroadc.o
 obj-$(CONFIG_RICHTEK_RTQ6056) += rtq6056.o
 obj-$(CONFIG_RN5T618_ADC) += rn5t618-adc.o
+obj-$(CONFIG_ROHM_BD79112) += rohm-bd79112.o
 obj-$(CONFIG_ROHM_BD79124) += rohm-bd79124.o
 obj-$(CONFIG_ROCKCHIP_SARADC) += rockchip_saradc.o
 obj-$(CONFIG_RZG2L_ADC) += rzg2l_adc.o

drivers/iio/adc/ab8500-gpadc.c

···
 	}
 
 	/* This eventually drops the regulator */
-	pm_runtime_mark_last_busy(gpadc->dev);
 	pm_runtime_put_autosuspend(gpadc->dev);
 
 	return (high_data << 8) | low_data;

drivers/iio/adc/ad4130.c

···
 
 	ret = devm_add_action_or_reset(dev, ad4130_disable_regulators, st);
 	if (ret)
-		return dev_err_probe(dev, ret,
-				     "Failed to add regulators disable action\n");
+		return ret;
 
 	ret = ad4130_soft_reset(st);
 	if (ret)

drivers/iio/adc/ad7124.c

···
  * AD7124 SPI ADC driver
  *
  * Copyright 2018 Analog Devices Inc.
+ * Copyright 2025 BayLibre, SAS
  */
 #include <linux/bitfield.h>
 #include <linux/bitops.h>
+#include <linux/cleanup.h>
 #include <linux/clk.h>
+#include <linux/clk-provider.h>
 #include <linux/delay.h>
 #include <linux/device.h>
 #include <linux/err.h>
 #include <linux/interrupt.h>
 #include <linux/kernel.h>
 #include <linux/kfifo.h>
+#include <linux/minmax.h>
 #include <linux/module.h>
 #include <linux/mod_devicetable.h>
 #include <linux/property.h>
 #include <linux/regulator/consumer.h>
 #include <linux/spi/spi.h>
+#include <linux/sprintf.h>
+#include <linux/units.h>
 
 #include <linux/iio/iio.h>
 #include <linux/iio/adc/ad_sigma_delta.h>
···
 #define AD7124_STATUS_POR_FLAG			BIT(4)
 
 /* AD7124_ADC_CONTROL */
+#define AD7124_ADC_CONTROL_CLK_SEL		GENMASK(1, 0)
+#define AD7124_ADC_CONTROL_CLK_SEL_INT			0
+#define AD7124_ADC_CONTROL_CLK_SEL_INT_OUT		1
+#define AD7124_ADC_CONTROL_CLK_SEL_EXT			2
+#define AD7124_ADC_CONTROL_CLK_SEL_EXT_DIV4		3
 #define AD7124_ADC_CONTROL_MODE			GENMASK(5, 2)
 #define AD7124_ADC_CONTROL_MODE_CONTINUOUS		0
 #define AD7124_ADC_CONTROL_MODE_SINGLE			1
···
 #define AD7124_CONFIG_PGA		GENMASK(2, 0)
 
 /* AD7124_FILTER_X */
-#define AD7124_FILTER_FS		GENMASK(10, 0)
 #define AD7124_FILTER_FILTER		GENMASK(23, 21)
 #define AD7124_FILTER_FILTER_SINC4		0
 #define AD7124_FILTER_FILTER_SINC3		2
+#define AD7124_FILTER_FILTER_SINC4_SINC1	4
+#define AD7124_FILTER_FILTER_SINC3_SINC1	5
+#define AD7124_FILTER_FILTER_SINC3_PF		7
+#define AD7124_FILTER_REJ60		BIT(20)
+#define AD7124_FILTER_POST_FILTER	GENMASK(19, 17)
+#define AD7124_FILTER_POST_FILTER_47dB		2
+#define AD7124_FILTER_POST_FILTER_62dB		3
+#define AD7124_FILTER_POST_FILTER_86dB		5
+#define AD7124_FILTER_POST_FILTER_92dB		6
+#define AD7124_FILTER_SINGLE_CYCLE	BIT(16)
+#define AD7124_FILTER_FS		GENMASK(10, 0)
 
 #define AD7124_MAX_CONFIGS	8
 #define AD7124_MAX_CHANNELS	16
+
+#define AD7124_INT_CLK_HZ	614400
 
 /* AD7124 input sources */
 
···
 };
 
 static const int ad7124_master_clk_freq_hz[3] = {
-	[AD7124_LOW_POWER] = 76800,
-	[AD7124_MID_POWER] = 153600,
-	[AD7124_FULL_POWER] = 614400,
+	[AD7124_LOW_POWER] = AD7124_INT_CLK_HZ / 8,
+	[AD7124_MID_POWER] = AD7124_INT_CLK_HZ / 4,
+	[AD7124_FULL_POWER] = AD7124_INT_CLK_HZ,
 };
 
 static const char * const ad7124_ref_names[] = {
···
 	unsigned int num_inputs;
 };
 
+enum ad7124_filter_type {
+	AD7124_FILTER_TYPE_SINC3,
+	AD7124_FILTER_TYPE_SINC3_PF1,
+	AD7124_FILTER_TYPE_SINC3_PF2,
+	AD7124_FILTER_TYPE_SINC3_PF3,
+	AD7124_FILTER_TYPE_SINC3_PF4,
+	AD7124_FILTER_TYPE_SINC3_REJ60,
+	AD7124_FILTER_TYPE_SINC3_SINC1,
+	AD7124_FILTER_TYPE_SINC4,
+	AD7124_FILTER_TYPE_SINC4_REJ60,
+	AD7124_FILTER_TYPE_SINC4_SINC1,
+};
+
 struct ad7124_channel_config {
 	bool live;
 	unsigned int cfg_slot;
+	unsigned int requested_odr;
+	unsigned int requested_odr_micro;
 	/*
 	 * Following fields are used to compare for equality. If you
 	 * make adaptations in it, you most likely also have to adapt
···
 		bool buf_negative;
 		unsigned int vref_mv;
 		unsigned int pga_bits;
-		unsigned int odr;
 		unsigned int odr_sel_bits;
-		unsigned int filter_type;
+		enum ad7124_filter_type filter_type;
 		unsigned int calibration_offset;
 		unsigned int calibration_gain;
 	);
···
 	struct ad_sigma_delta sd;
 	struct ad7124_channel *channels;
 	struct regulator *vref[4];
-	struct clk *mclk;
+	u32 clk_hz;
 	unsigned int adc_control;
 	unsigned int num_channels;
 	struct mutex cfgs_lock; /* lock for configs access */
···
 	return ad_sd_write_reg(&st->sd, AD7124_ADC_CONTROL, 2, st->adc_control);
 }
 
-static void ad7124_set_channel_odr(struct ad7124_state *st, unsigned int channel, unsigned int odr)
+static u32 ad7124_get_fclk_hz(struct ad7124_state *st)
 {
-	unsigned int fclk, odr_sel_bits;
+	enum ad7124_power_mode power_mode;
+	u32 fclk_hz;
 
-	fclk = clk_get_rate(st->mclk);
+	power_mode = FIELD_GET(AD7124_ADC_CONTROL_POWER_MODE, st->adc_control);
+	fclk_hz = st->clk_hz;
+
+	switch (power_mode) {
+	case AD7124_LOW_POWER:
+		fclk_hz /= 8;
+		break;
+	case AD7124_MID_POWER:
+		fclk_hz /= 4;
+		break;
+	default:
+		break;
+	}
+
+	return fclk_hz;
+}
+
+static u32 ad7124_get_fs_factor(struct ad7124_state *st, unsigned int channel)
+{
+	enum ad7124_power_mode power_mode =
+		FIELD_GET(AD7124_ADC_CONTROL_POWER_MODE, st->adc_control);
+	u32 avg = power_mode == AD7124_LOW_POWER ? 8 : 16;
+
 	/*
-	 * FS[10:0] = fCLK / (fADC x 32) where:
+	 * These are the "zero-latency" factors from the data sheet. For the
+	 * sinc1 filters, these aren't documented, but derived by taking the
+	 * single-channel formula from the sinc1 section of the data sheet and
+	 * multiplying that by the sinc3/4 factor from the corresponding zero-
+	 * latency sections.
+	 */
+	switch (st->channels[channel].cfg.filter_type) {
+	case AD7124_FILTER_TYPE_SINC4:
+	case AD7124_FILTER_TYPE_SINC4_REJ60:
+		return 4 * 32;
+	case AD7124_FILTER_TYPE_SINC4_SINC1:
+		return 4 * avg * 32;
+	case AD7124_FILTER_TYPE_SINC3_SINC1:
+		return 3 * avg * 32;
+	default:
+		return 3 * 32;
+	}
+}
+
+static u32 ad7124_get_fadc_divisor(struct ad7124_state *st, unsigned int channel)
+{
+	u32 factor = ad7124_get_fs_factor(st, channel);
+
+	/*
+	 * The output data rate (f_ADC) is f_CLK / divisor. We are returning
+	 * the divisor.
+	 */
+	return st->channels[channel].cfg.odr_sel_bits * factor;
+}
+
+static void ad7124_set_channel_odr(struct ad7124_state *st, unsigned int channel)
+{
+	struct ad7124_channel_config *cfg = &st->channels[channel].cfg;
+	unsigned int fclk, factor, divisor, odr_sel_bits;
+
+	fclk = ad7124_get_fclk_hz(st);
+	factor = ad7124_get_fs_factor(st, channel);
+
+	/*
+	 * FS[10:0] = fCLK / (fADC x 32 * N) where:
 	 * fADC is the output data rate
 	 * fCLK is the master clock frequency
+	 * N is number of conversions per sample (depends on filter type)
 	 * FS[10:0] are the bits in the filter register
 	 * FS[10:0] can have a value from 1 to 2047
 	 */
-	odr_sel_bits = DIV_ROUND_CLOSEST(fclk, odr * 32);
-	if (odr_sel_bits < 1)
-		odr_sel_bits = 1;
-	else if (odr_sel_bits > 2047)
-		odr_sel_bits = 2047;
+	divisor = cfg->requested_odr * factor +
+		  cfg->requested_odr_micro * factor / MICRO;
+	odr_sel_bits = clamp(DIV_ROUND_CLOSEST(fclk, divisor), 1, 2047);
 
 	if (odr_sel_bits != st->channels[channel].cfg.odr_sel_bits)
 		st->channels[channel].cfg.live = false;
 
-	/* fADC = fCLK / (FS[10:0] x 32) */
-	st->channels[channel].cfg.odr = DIV_ROUND_CLOSEST(fclk, odr_sel_bits * 32);
 	st->channels[channel].cfg.odr_sel_bits = odr_sel_bits;
 }
 
-static int ad7124_get_3db_filter_freq(struct ad7124_state *st,
-				      unsigned int channel)
+static int ad7124_get_3db_filter_factor(struct ad7124_state *st,
+					unsigned int channel)
 {
-	unsigned int fadc;
+	struct ad7124_channel_config *cfg = &st->channels[channel].cfg;
 
-	fadc = st->channels[channel].cfg.odr;
-
-	switch (st->channels[channel].cfg.filter_type) {
-	case AD7124_FILTER_FILTER_SINC3:
-		return DIV_ROUND_CLOSEST(fadc * 272, 1000);
-	case AD7124_FILTER_FILTER_SINC4:
-		return DIV_ROUND_CLOSEST(fadc * 230, 1000);
+	/*
+	 * 3dB point is the f_CLK rate times some factor. This functions returns
+	 * the factor times 1000.
+	 */
+	switch (cfg->filter_type) {
+	case AD7124_FILTER_TYPE_SINC3:
+	case AD7124_FILTER_TYPE_SINC3_REJ60:
+	case AD7124_FILTER_TYPE_SINC3_SINC1:
+		return 272;
+	case AD7124_FILTER_TYPE_SINC4:
+	case AD7124_FILTER_TYPE_SINC4_REJ60:
+	case AD7124_FILTER_TYPE_SINC4_SINC1:
+		return 230;
+	case AD7124_FILTER_TYPE_SINC3_PF1:
+		return 633;
+	case AD7124_FILTER_TYPE_SINC3_PF2:
+		return 605;
+	case AD7124_FILTER_TYPE_SINC3_PF3:
+		return 669;
+	case AD7124_FILTER_TYPE_SINC3_PF4:
+		return 759;
 	default:
 		return -EINVAL;
 	}
···
 				     bool buf_negative;
 				     unsigned int vref_mv;
 				     unsigned int pga_bits;
-				     unsigned int odr;
 				     unsigned int odr_sel_bits;
-				     unsigned int filter_type;
+				     enum ad7124_filter_type filter_type;
 				     unsigned int calibration_offset;
 				     unsigned int calibration_gain;
 			     }));
···
 		    cfg->buf_negative == cfg_aux->buf_negative &&
 		    cfg->vref_mv == cfg_aux->vref_mv &&
 		    cfg->pga_bits == cfg_aux->pga_bits &&
-		    cfg->odr == cfg_aux->odr &&
 		    cfg->odr_sel_bits == cfg_aux->odr_sel_bits &&
 		    cfg->filter_type == cfg_aux->filter_type &&
 		    cfg->calibration_offset == cfg_aux->calibration_offset &&
···
 static int ad7124_write_config(struct ad7124_state *st, struct ad7124_channel_config *cfg,
 			       unsigned int cfg_slot)
 {
-	unsigned int tmp;
-	unsigned int val;
+	unsigned int val, filter;
+	unsigned int rej60 = 0;
+	unsigned int post = 0;
 	int ret;
 
 	cfg->cfg_slot = cfg_slot;
···
 	if (ret < 0)
 		return ret;
 
-	tmp = FIELD_PREP(AD7124_FILTER_FILTER, cfg->filter_type) |
-		FIELD_PREP(AD7124_FILTER_FS, cfg->odr_sel_bits);
-	return ad7124_spi_write_mask(st, AD7124_FILTER(cfg->cfg_slot),
-				     AD7124_FILTER_FILTER | AD7124_FILTER_FS,
-				     tmp, 3);
+	switch (cfg->filter_type) {
+	case AD7124_FILTER_TYPE_SINC3:
+		filter = AD7124_FILTER_FILTER_SINC3;
+		break;
+	case AD7124_FILTER_TYPE_SINC3_PF1:
+		filter = AD7124_FILTER_FILTER_SINC3_PF;
+		post = AD7124_FILTER_POST_FILTER_47dB;
+		break;
+	case AD7124_FILTER_TYPE_SINC3_PF2:
+		filter = AD7124_FILTER_FILTER_SINC3_PF;
+		post = AD7124_FILTER_POST_FILTER_62dB;
+		break;
+	case AD7124_FILTER_TYPE_SINC3_PF3:
+		filter = AD7124_FILTER_FILTER_SINC3_PF;
+		post = AD7124_FILTER_POST_FILTER_86dB;
+		break;
+	case AD7124_FILTER_TYPE_SINC3_PF4:
+		filter = AD7124_FILTER_FILTER_SINC3_PF;
+		post = AD7124_FILTER_POST_FILTER_92dB;
+		break;
+	case AD7124_FILTER_TYPE_SINC3_REJ60:
+		filter = AD7124_FILTER_FILTER_SINC3;
+		rej60 = 1;
+		break;
+	case AD7124_FILTER_TYPE_SINC3_SINC1:
+		filter = AD7124_FILTER_FILTER_SINC3_SINC1;
+		break;
+	case AD7124_FILTER_TYPE_SINC4:
+		filter = AD7124_FILTER_FILTER_SINC4;
+		break;
+	case AD7124_FILTER_TYPE_SINC4_REJ60:
+		filter = AD7124_FILTER_FILTER_SINC4;
+		rej60 = 1;
+		break;
+	case AD7124_FILTER_TYPE_SINC4_SINC1:
+		filter = AD7124_FILTER_FILTER_SINC4_SINC1;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	/*
+	 * NB: AD7124_FILTER_SINGLE_CYCLE is always set so that we get the same
+	 * sampling frequency even when only one channel is enabled in a
+	 * buffered read. If it was not set, the N in ad7124_set_channel_odr()
+	 * would be 1 and we would get a faster sampling frequency than what
+	 * was requested.
+	 */
+	return ad_sd_write_reg(&st->sd, AD7124_FILTER(cfg->cfg_slot), 3,
+			       FIELD_PREP(AD7124_FILTER_FILTER, filter) |
+			       FIELD_PREP(AD7124_FILTER_REJ60, rej60) |
+			       FIELD_PREP(AD7124_FILTER_POST_FILTER, post) |
+			       AD7124_FILTER_SINGLE_CYCLE |
+			       FIELD_PREP(AD7124_FILTER_FS, cfg->odr_sel_bits));
 }
 
 static struct ad7124_channel_config *ad7124_pop_config(struct ad7124_state *st)
···
 	.num_resetclks = 64,
 };
 
+static const int ad7124_voltage_scales[][2] = {
+	{ 0, 1164 },
+	{ 0, 2328 },
+	{ 0, 4656 },
+	{ 0, 9313 },
+	{ 0, 18626 },
+	{ 0, 37252 },
+	{ 0, 74505 },
+	{ 0, 149011 },
+	{ 0, 298023 },
+};
+
+static int ad7124_read_avail(struct iio_dev *indio_dev,
+			     struct iio_chan_spec const *chan,
+			     const int **vals, int *type, int *length, long info)
+{
+	switch (info) {
+	case IIO_CHAN_INFO_SCALE:
+		*vals = (const int *)ad7124_voltage_scales;
+		*type = IIO_VAL_INT_PLUS_NANO;
+		*length = ARRAY_SIZE(ad7124_voltage_scales) * 2;
+		return IIO_AVAIL_LIST;
+	default:
+		return -EINVAL;
+	}
+}
+
 static int ad7124_read_raw(struct iio_dev *indio_dev,
 			   struct iio_chan_spec const *chan,
 			   int *val, int *val2, long info)
···
 			return -EINVAL;
 		}
 
-	case IIO_CHAN_INFO_SAMP_FREQ:
-		mutex_lock(&st->cfgs_lock);
-		*val = st->channels[chan->address].cfg.odr;
-		mutex_unlock(&st->cfgs_lock);
+	case IIO_CHAN_INFO_SAMP_FREQ: {
+		struct ad7124_channel_config *cfg = &st->channels[chan->address].cfg;
 
-		return IIO_VAL_INT;
-	case IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY:
-		mutex_lock(&st->cfgs_lock);
-		*val = ad7124_get_3db_filter_freq(st, chan->scan_index);
-		mutex_unlock(&st->cfgs_lock);
+		guard(mutex)(&st->cfgs_lock);
 
-		return IIO_VAL_INT;
+		switch (cfg->filter_type) {
+		case AD7124_FILTER_TYPE_SINC3:
+		case AD7124_FILTER_TYPE_SINC3_REJ60:
+		case AD7124_FILTER_TYPE_SINC3_SINC1:
+		case AD7124_FILTER_TYPE_SINC4:
+		case AD7124_FILTER_TYPE_SINC4_REJ60:
+		case AD7124_FILTER_TYPE_SINC4_SINC1:
+			*val = ad7124_get_fclk_hz(st);
+			*val2 = ad7124_get_fadc_divisor(st, chan->address);
+			return IIO_VAL_FRACTIONAL;
+		/*
+		 * Post filters force the chip to a fixed rate. These are the
+		 * single-channel rates from the data sheet divided by 3 for
+		 * the multi-channel case (data sheet doesn't explicitly state
+		 * this but confirmed through testing).
+		 */
+		case AD7124_FILTER_TYPE_SINC3_PF1:
+			*val = 300;
+			*val2 = 33;
+			return IIO_VAL_FRACTIONAL;
+		case AD7124_FILTER_TYPE_SINC3_PF2:
+			*val = 25;
+			*val2 = 3;
+			return IIO_VAL_FRACTIONAL;
+		case AD7124_FILTER_TYPE_SINC3_PF3:
+			*val = 20;
+			*val2 = 3;
+			return IIO_VAL_FRACTIONAL;
+		case AD7124_FILTER_TYPE_SINC3_PF4:
+			*val = 50;
+			*val2 = 9;
+			return IIO_VAL_FRACTIONAL;
+		default:
+			return -EINVAL;
+		}
+	}
+	case IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY: {
+		guard(mutex)(&st->cfgs_lock);
+
+		ret = ad7124_get_3db_filter_factor(st, chan->address);
+		if (ret < 0)
+			return ret;
+
+		/* 3dB point is the f_CLK rate times a fractional value */
+		*val = ret * ad7124_get_fclk_hz(st);
+		*val2 = MILLI * ad7124_get_fadc_divisor(st, chan->address);
+		return IIO_VAL_FRACTIONAL;
+	}
 	default:
 		return -EINVAL;
 	}
···
 			    int val, int val2, long info)
 {
 	struct ad7124_state *st = iio_priv(indio_dev);
+	struct ad7124_channel_config *cfg = &st->channels[chan->address].cfg;
 	unsigned int res, gain, full_scale, vref;
-	int ret = 0;
 
-	mutex_lock(&st->cfgs_lock);
+	guard(mutex)(&st->cfgs_lock);
 
 	switch (info) {
 	case IIO_CHAN_INFO_SAMP_FREQ:
-		if (val2 != 0 || val == 0) {
-			ret = -EINVAL;
-			break;
-		}
+		if (val2 < 0 || val < 0 || (val2 == 0 && val == 0))
+			return -EINVAL;
 
-		ad7124_set_channel_odr(st, chan->address, val);
-		break;
+		cfg->requested_odr = val;
+		cfg->requested_odr_micro = val2;
+		ad7124_set_channel_odr(st, chan->address);
+
+		return 0;
 	case IIO_CHAN_INFO_SCALE:
-		if (val != 0) {
-			ret = -EINVAL;
-			break;
-		}
+		if (val != 0)
+			return -EINVAL;
 
 		if (st->channels[chan->address].cfg.bipolar)
 			full_scale = 1 << (chan->scan_type.realbits - 1);
···
 			st->channels[chan->address].cfg.live = false;
 
 		st->channels[chan->address].cfg.pga_bits = res;
-		break;
+		return 0;
 	default:
-		ret = -EINVAL;
+		return -EINVAL;
 	}
-
-	mutex_unlock(&st->cfgs_lock);
-	return ret;
 }
 
 static int ad7124_reg_access(struct iio_dev *indio_dev,
···
 	return ret;
 }
 
-static IIO_CONST_ATTR(in_voltage_scale_available,
-	"0.000001164 0.000002328 0.000004656 0.000009313 0.000018626 0.000037252 0.000074505 0.000149011 0.000298023");
-
-static struct attribute *ad7124_attributes[] = {
-	&iio_const_attr_in_voltage_scale_available.dev_attr.attr,
-	NULL,
-};
-
-static const struct attribute_group ad7124_attrs_group = {
-	.attrs = ad7124_attributes,
-};
-
 static int ad7124_update_scan_mode(struct iio_dev *indio_dev,
 				   const unsigned long *scan_mask)
 {
···
 	int ret;
 	int i;
 
-	mutex_lock(&st->cfgs_lock);
+	guard(mutex)(&st->cfgs_lock);
+
 	for (i = 0; i < st->num_channels; i++) {
 		bit_set = test_bit(i, scan_mask);
 		if (bit_set)
···
 		else
 			ret = ad7124_spi_write_mask(st, AD7124_CHANNEL(i), AD7124_CHANNEL_ENABLE,
 						    0, 2);
-		if (ret < 0) {
-			mutex_unlock(&st->cfgs_lock);
-
+		if (ret < 0)
 			return ret;
-		}
 	}
-
-	mutex_unlock(&st->cfgs_lock);
 
 	return 0;
 }
 
 static const struct iio_info ad7124_info = {
+	.read_avail = ad7124_read_avail,
 	.read_raw = ad7124_read_raw,
 	.write_raw = ad7124_write_raw,
 	.debugfs_reg_access = &ad7124_reg_access,
 	.validate_trigger = ad_sd_validate_trigger,
 	.update_scan_mode = ad7124_update_scan_mode,
-	.attrs = &ad7124_attrs_group,
 };
 
 /* Only called during probe, so dev_err_probe() can be used */
···
 	.get = ad7124_get_syscalib_mode
 };
 
+static const char * const ad7124_filter_types[] = {
+	[AD7124_FILTER_TYPE_SINC3] = "sinc3",
+	[AD7124_FILTER_TYPE_SINC3_PF1] = "sinc3+pf1",
+	[AD7124_FILTER_TYPE_SINC3_PF2] = "sinc3+pf2",
+	[AD7124_FILTER_TYPE_SINC3_PF3] = "sinc3+pf3",
+	[AD7124_FILTER_TYPE_SINC3_PF4] = "sinc3+pf4",
+	[AD7124_FILTER_TYPE_SINC3_REJ60] = "sinc3+rej60",
+	[AD7124_FILTER_TYPE_SINC3_SINC1] = "sinc3+sinc1",
+	[AD7124_FILTER_TYPE_SINC4] = "sinc4",
+	[AD7124_FILTER_TYPE_SINC4_REJ60] = "sinc4+rej60",
+	[AD7124_FILTER_TYPE_SINC4_SINC1] = "sinc4+sinc1",
+};
+
+static int ad7124_set_filter_type_attr(struct iio_dev *dev,
+				       const struct iio_chan_spec *chan,
+				       unsigned int value)
+{
+	struct ad7124_state *st = iio_priv(dev);
+	struct ad7124_channel_config *cfg = &st->channels[chan->address].cfg;
+
+	guard(mutex)(&st->cfgs_lock);
+
+	cfg->live = false;
+	cfg->filter_type = value;
+	ad7124_set_channel_odr(st, chan->address);
+
+	return 0;
+}
+
+static int ad7124_get_filter_type_attr(struct iio_dev *dev,
+				       const struct iio_chan_spec *chan)
+{
+	struct ad7124_state *st = iio_priv(dev);
+
+	guard(mutex)(&st->cfgs_lock);
+
+	return st->channels[chan->address].cfg.filter_type;
+}
+
+static const struct iio_enum ad7124_filter_type_enum = {
+	.items = ad7124_filter_types,
+	.num_items = ARRAY_SIZE(ad7124_filter_types),
+	.set = ad7124_set_filter_type_attr,
+	.get = ad7124_get_filter_type_attr,
+};
+
 static const struct iio_chan_spec_ext_info ad7124_calibsys_ext_info[] = {
 	{
 		.name = "sys_calibration",
···
 		 &ad7124_syscalib_mode_enum),
 	IIO_ENUM_AVAILABLE("sys_calibration_mode", IIO_SHARED_BY_TYPE,
 			   &ad7124_syscalib_mode_enum),
+	IIO_ENUM("filter_type", IIO_SEPARATE, &ad7124_filter_type_enum),
+	IIO_ENUM_AVAILABLE("filter_type", IIO_SHARED_BY_TYPE,
+			   &ad7124_filter_type_enum),
 	{ }
 };
 
···
 		BIT(IIO_CHAN_INFO_OFFSET) |
 		BIT(IIO_CHAN_INFO_SAMP_FREQ) |
 		BIT(IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY),
+	.info_mask_shared_by_type_available = BIT(IIO_CHAN_INFO_SCALE),
 	.scan_type = {
 		.sign = 'u',
 		.realbits = 24,
···
 static int ad7124_setup(struct ad7124_state *st)
 {
 	struct device *dev = &st->sd.spi->dev;
-	unsigned int fclk, power_mode;
+	unsigned int power_mode, clk_sel;
+	struct clk *mclk;
 	int i, ret;
 
-	fclk = clk_get_rate(st->mclk);
-	if (!fclk)
-		return dev_err_probe(dev, -EINVAL, "Failed to get mclk rate\n");
+	/*
+	 * Always use full power mode for max performance. If needed, the driver
+	 * could be adapted to use a dynamic power mode based on the requested
+	 * output data rate.
+	 */
+	power_mode = AD7124_ADC_CONTROL_POWER_MODE_FULL;
 
-	/* The power mode changes the master clock frequency */
-	power_mode = ad7124_find_closest_match(ad7124_master_clk_freq_hz,
-					ARRAY_SIZE(ad7124_master_clk_freq_hz),
-					fclk);
-	if (fclk != ad7124_master_clk_freq_hz[power_mode]) {
-		ret = clk_set_rate(st->mclk, fclk);
+	/*
+	 * This "mclk" business is needed for backwards compatibility with old
+	 * devicetrees that specified a fake clock named "mclk" to select the
+	 * power mode.
+	 */
+	mclk = devm_clk_get_optional_enabled(dev, "mclk");
+	if (IS_ERR(mclk))
+		return dev_err_probe(dev, PTR_ERR(mclk), "Failed to get mclk\n");
+
+	if (mclk) {
+		unsigned long mclk_hz;
+
+		mclk_hz = clk_get_rate(mclk);
+		if (!mclk_hz)
+			return dev_err_probe(dev, -EINVAL,
+					     "Failed to get mclk rate\n");
+
+		/*
+		 * This logic is a bit backwards, which is why it is only here
+		 * for backwards compatibility. The driver should be able to set
+		 * the power mode as it sees fit and the f_clk/mclk rate should
+		 * be dynamic accordingly. But here, we are selecting a fixed
+		 * power mode based on the given "mclk" rate.
+		 */
+		power_mode = ad7124_find_closest_match(ad7124_master_clk_freq_hz,
+			ARRAY_SIZE(ad7124_master_clk_freq_hz), mclk_hz);
+
+		if (mclk_hz != ad7124_master_clk_freq_hz[power_mode]) {
+			ret = clk_set_rate(mclk, mclk_hz);
+			if (ret)
+				return dev_err_probe(dev, ret,
+						     "Failed to set mclk rate\n");
+		}
+
+		clk_sel = AD7124_ADC_CONTROL_CLK_SEL_INT;
+		st->clk_hz = AD7124_INT_CLK_HZ;
+	} else if (!device_property_present(dev, "clocks") &&
+		   device_property_present(dev, "#clock-cells")) {
+#ifdef CONFIG_COMMON_CLK
+		struct clk_hw *clk_hw;
+
+		const char *name __free(kfree) = kasprintf(GFP_KERNEL, "%pfwP-clk",
+							   dev_fwnode(dev));
+		if (!name)
+			return -ENOMEM;
+
+		clk_hw = devm_clk_hw_register_fixed_rate(dev, name, NULL, 0,
+							 AD7124_INT_CLK_HZ);
+		if (IS_ERR(clk_hw))
+			return dev_err_probe(dev, PTR_ERR(clk_hw),
+					     "Failed to register clock provider\n");
+
+		ret = devm_of_clk_add_hw_provider(dev, of_clk_hw_simple_get,
+						  clk_hw);
 		if (ret)
-			return dev_err_probe(dev, ret, "Failed to set mclk rate\n");
+			return dev_err_probe(dev, ret,
+					     "Failed to add clock provider\n");
+#endif
+
+		/*
+		 * Treat the clock as always on. This way we don't have to deal
+		 * with someone trying to enable/disable the clock while we are
+		 * reading samples.
+		 */
+		clk_sel = AD7124_ADC_CONTROL_CLK_SEL_INT_OUT;
+		st->clk_hz = AD7124_INT_CLK_HZ;
+	} else {
+		struct clk *clk;
+
+		clk = devm_clk_get_optional_enabled(dev, NULL);
+		if (IS_ERR(clk))
+			return dev_err_probe(dev, PTR_ERR(clk),
+					     "Failed to get external clock\n");
+
+		if (clk) {
+			unsigned long clk_hz;
+
+			clk_hz = clk_get_rate(clk);
+			if (!clk_hz)
+				return dev_err_probe(dev, -EINVAL,
+					"Failed to get external clock rate\n");
+
+			/*
+			 * The external clock may be 4x the nominal clock rate,
+			 * in which case the ADC needs to be configured to
+			 * divide it by 4. Using MEGA is a bit arbitrary, but
+			 * the expected clock rates are either 614.4 kHz or
+			 * 2.4576 MHz, so this should work.
+			 */
+			if (clk_hz > (1 * HZ_PER_MHZ)) {
+				clk_sel = AD7124_ADC_CONTROL_CLK_SEL_EXT_DIV4;
+				st->clk_hz = clk_hz / 4;
+			} else {
+				clk_sel = AD7124_ADC_CONTROL_CLK_SEL_EXT;
+				st->clk_hz = clk_hz;
+			}
+		} else {
+			clk_sel = AD7124_ADC_CONTROL_CLK_SEL_INT;
+			st->clk_hz = AD7124_INT_CLK_HZ;
+		}
 	}
 
-	/* Set the power mode */
+	st->adc_control &= ~AD7124_ADC_CONTROL_CLK_SEL;
+	st->adc_control |= FIELD_PREP(AD7124_ADC_CONTROL_CLK_SEL, clk_sel);
+
 	st->adc_control &= ~AD7124_ADC_CONTROL_POWER_MODE;
 	st->adc_control |= FIELD_PREP(AD7124_ADC_CONTROL_POWER_MODE, power_mode);
 
···
 	mutex_init(&st->cfgs_lock);
 	INIT_KFIFO(st->live_cfgs_fifo);
 	for (i = 0; i < st->num_channels; i++) {
+		struct ad7124_channel_config *cfg = &st->channels[i].cfg;
 
-		ret = ad7124_init_config_vref(st, &st->channels[i].cfg);
+		ret = ad7124_init_config_vref(st, cfg);
 		if (ret < 0)
 			return ret;
+
+		/* Default filter type on the ADC after reset. */
+		cfg->filter_type = AD7124_FILTER_TYPE_SINC4;
 
 		/*
 		 * 9.38 SPS is the minimum output data rate supported
 		 * regardless of the selected power mode. Round it up to 10 and
 		 * set all channels to this default value.
 		 */
-		ad7124_set_channel_odr(st, i, 10);
+		cfg->requested_odr = 10;
+		ad7124_set_channel_odr(st, i);
 	}
 
 	ad7124_disable_all(&st->sd);
···
 		ret = devm_add_action_or_reset(&spi->dev, ad7124_reg_disable,
 					       st->vref[i]);
 		if (ret)
-			return dev_err_probe(dev, ret, "Failed to register disable handler for regulator #%d\n", i);
+			return ret;
 	}
-
-	st->mclk = devm_clk_get_enabled(&spi->dev, "mclk");
-	if (IS_ERR(st->mclk))
-		return dev_err_probe(dev, PTR_ERR(st->mclk), "Failed to get mclk\n");
 
 	ret = ad7124_soft_reset(st);
 	if (ret < 0)

drivers/iio/adc/ad7173.c

···
  *  AD7175-8/AD7176-2/AD7177-2
  *
  * Copyright (C) 2015, 2024 Analog Devices, Inc.
+ * Copyright (C) 2025 BayLibre, SAS
  */
 
 #include <linux/array_size.h>
···
 					       (pin2) < st->info->num_voltage_in && \
 					       (pin2) >= st->info->num_voltage_in_div)
 
-#define AD7173_FILTER_ODR0_MASK		GENMASK(5, 0)
+#define AD7173_FILTER_SINC3_MAP		BIT(15)
+#define AD7173_FILTER_SINC3_MAP_DIV	GENMASK(14, 0)
+#define AD7173_FILTER_ENHFILTEN		BIT(11)
+#define AD7173_FILTER_ENHFILT_MASK	GENMASK(10, 8)
+#define AD7173_FILTER_ORDER		BIT(6)
+#define AD7173_FILTER_ODR_MASK		GENMASK(5, 0)
 #define AD7173_MAX_CONFIGS		8
 #define AD4111_OW_DET_THRSH_MV		300
 
···
 	u8 num_gpios;
 };
 
+enum ad7173_filter_type {
+	AD7173_FILTER_SINC3,
+	AD7173_FILTER_SINC5_SINC1,
+	AD7173_FILTER_SINC5_SINC1_PF1,
+	AD7173_FILTER_SINC5_SINC1_PF2,
+	AD7173_FILTER_SINC5_SINC1_PF3,
+	AD7173_FILTER_SINC5_SINC1_PF4,
+};
+
 struct ad7173_channel_config {
 	/* Openwire detection threshold */
 	unsigned int openwire_thrsh_raw;
···
 	struct_group(config_props,
 		bool bipolar;
 		bool input_buf;
-		u8 odr;
+		u16 sinc3_odr_div;
+		u8 sinc5_odr_index;
 		u8 ref_sel;
+		enum ad7173_filter_type filter_type;
 	);
 };
 
···
 	49960,    20000,    16666,    10000,	/* 16-19 */
 	5000,					/* 20    */
 };
+
+/**
+ * ad7173_sinc3_odr_div_from_odr() - Convert ODR to divider value
+ * @odr_millihz: ODR (sampling_frequency) in milliHz
+ * Returns: Divider value for SINC3 filter to pass.
+ */
+static u16 ad7173_sinc3_odr_div_from_odr(u32 odr_millihz)
+{
+	/*
+	 * Divider is f_MOD (1 MHz) / 32 / ODR. ODR freq is in milliHz, so
+	 * we need to convert f_MOD to the same units. When SING_CYC=1 or
+	 * multiple channels are enabled (currently always the case), there
+	 * is an additional factor of 3.
+	 */
+	u32 div = DIV_ROUND_CLOSEST(MEGA * MILLI, odr_millihz * 32 * 3);
+	/* Avoid divide by 0 and limit to register field size. */
+	return clamp(div, 1U, AD7173_FILTER_SINC3_MAP_DIV);
+}
 
 static unsigned int ad4111_current_channel_config[] = {
 	/* Ain sel: pos        neg    */
···
 	.get = ad7173_get_syscalib_mode
 };
 
-static const struct iio_chan_spec_ext_info ad7173_calibsys_ext_info[] = {
+static const char * const ad7173_filter_types_str[] = {
+	[AD7173_FILTER_SINC3] = "sinc3",
+	[AD7173_FILTER_SINC5_SINC1] = "sinc5+sinc1",
+	[AD7173_FILTER_SINC5_SINC1_PF1] = "sinc5+sinc1+pf1",
+	[AD7173_FILTER_SINC5_SINC1_PF2] = "sinc5+sinc1+pf2",
+	[AD7173_FILTER_SINC5_SINC1_PF3] = "sinc5+sinc1+pf3",
+	[AD7173_FILTER_SINC5_SINC1_PF4] = "sinc5+sinc1+pf4",
+};
+
+static int ad7173_set_filter_type(struct iio_dev *indio_dev,
+				  const struct iio_chan_spec *chan,
+				  unsigned int val)
+{
+	struct ad7173_state *st = iio_priv(indio_dev);
+
+	if (!iio_device_claim_direct(indio_dev))
+		return -EBUSY;
+
+	st->channels[chan->address].cfg.filter_type = val;
+	st->channels[chan->address].cfg.live = false;
+
+	iio_device_release_direct(indio_dev);
+
+	return 0;
+}
+
+static int ad7173_get_filter_type(struct iio_dev *indio_dev,
+				  const struct iio_chan_spec *chan)
+{
+	struct ad7173_state *st = iio_priv(indio_dev);
+
+	return st->channels[chan->address].cfg.filter_type;
+}
+
+static const struct iio_enum ad7173_filter_type_enum = {
+	.items = ad7173_filter_types_str,
+	.num_items = ARRAY_SIZE(ad7173_filter_types_str),
+	.set = ad7173_set_filter_type,
+	.get = ad7173_get_filter_type,
+};
+
+static const struct iio_chan_spec_ext_info ad7173_chan_spec_ext_info[] = {
 	{
 		.name = "sys_calibration",
 		.write = ad7173_write_syscalib,
···
 		 &ad7173_syscalib_mode_enum),
 	IIO_ENUM_AVAILABLE("sys_calibration_mode", IIO_SHARED_BY_TYPE,
 			   &ad7173_syscalib_mode_enum),
+	IIO_ENUM("filter_type", IIO_SEPARATE, &ad7173_filter_type_enum),
+	IIO_ENUM_AVAILABLE("filter_type", IIO_SHARED_BY_TYPE,
+			   &ad7173_filter_type_enum),
+	{ }
+};
+
+static const struct iio_chan_spec_ext_info ad7173_temp_chan_spec_ext_info[] = {
+	IIO_ENUM("filter_type", IIO_SEPARATE, &ad7173_filter_type_enum),
+	IIO_ENUM_AVAILABLE("filter_type", IIO_SHARED_BY_TYPE,
+			   &ad7173_filter_type_enum),
 	{ }
 };
 
···
 		      sizeof(struct {
 				     bool bipolar;
 				     bool input_buf;
-				     u8 odr;
+				     u16 sinc3_odr_div;
+				     u8 sinc5_odr_index;
 				     u8 ref_sel;
+				     enum ad7173_filter_type filter_type;
 			     }));
 
 	return cfg1->bipolar == cfg2->bipolar &&
 	       cfg1->input_buf == cfg2->input_buf &&
-	       cfg1->odr == cfg2->odr &&
-	       cfg1->ref_sel == cfg2->ref_sel;
+	       cfg1->sinc3_odr_div == cfg2->sinc3_odr_div &&
+	       cfg1->sinc5_odr_index == cfg2->sinc5_odr_index &&
+	       cfg1->ref_sel == cfg2->ref_sel &&
+	       cfg1->filter_type == cfg2->filter_type;
 }
 
 static struct ad7173_channel_config *
···
 {
 	unsigned int config;
 	int free_cfg_slot, ret;
+	u8 post_filter_enable, post_filter_select;
 
 	free_cfg_slot = ida_alloc_range(&st->cfg_slots_status, 0,
 					st->info->num_configs - 1, GFP_KERNEL);
···
 	if (ret)
 		return ret;
 
+	/*
+	 * When SINC3_MAP flag is enabled, the rest of the register has a
+	 * different meaning. We are using this option to allow the most
+	 * possible sampling frequencies with SINC3 filter.
+	 */
+	if (cfg->filter_type == AD7173_FILTER_SINC3)
+		return ad_sd_write_reg(&st->sd, AD7173_REG_FILTER(free_cfg_slot), 2,
+				       FIELD_PREP(AD7173_FILTER_SINC3_MAP, 1) |
+				       FIELD_PREP(AD7173_FILTER_SINC3_MAP_DIV,
+						  cfg->sinc3_odr_div));
+
+	switch (cfg->filter_type) {
+	case AD7173_FILTER_SINC5_SINC1_PF1:
+		post_filter_enable = 1;
+		post_filter_select = 2;
+		break;
+	case AD7173_FILTER_SINC5_SINC1_PF2:
+		post_filter_enable = 1;
+		post_filter_select = 3;
+		break;
+	case AD7173_FILTER_SINC5_SINC1_PF3:
+		post_filter_enable = 1;
+		post_filter_select = 5;
+		break;
+	case AD7173_FILTER_SINC5_SINC1_PF4:
+		post_filter_enable = 1;
+		post_filter_select = 6;
+		break;
+	default:
+		post_filter_enable = 0;
+		post_filter_select = 0;
+		break;
+	}
+
 	return ad_sd_write_reg(&st->sd, AD7173_REG_FILTER(free_cfg_slot), 2,
-			       AD7173_FILTER_ODR0_MASK & cfg->odr);
+			       FIELD_PREP(AD7173_FILTER_SINC3_MAP, 0) |
+			       FIELD_PREP(AD7173_FILTER_ENHFILT_MASK,
+					  post_filter_enable) |
+			       FIELD_PREP(AD7173_FILTER_ENHFILTEN,
+					  post_filter_select) |
+			       FIELD_PREP(AD7173_FILTER_ORDER, 0) |
+			       FIELD_PREP(AD7173_FILTER_ODR_MASK,
+					  cfg->sinc5_odr_index));
 }
 
 static int ad7173_config_channel(struct ad7173_state *st, int addr)
···
 	.set_mode = ad7173_set_mode,
 	.has_registers = true,
 	.has_named_irqs = true,
+	.supports_spi_offload = true,
 	.addr_shift = 0,
 	.read_mask = BIT(6),
 	.status_ch_mask = GENMASK(3, 0),
···
 	.set_mode = ad7173_set_mode,
 	.has_registers = true,
 	.has_named_irqs = true,
+	.supports_spi_offload = true,
 	.addr_shift = 0,
 	.read_mask = BIT(6),
 	.status_ch_mask = GENMASK(3, 0),
···
 	.set_mode = ad7173_set_mode,
 	.has_registers = true,
 	.has_named_irqs = true,
+	.supports_spi_offload = true,
 	.addr_shift = 0,
 	.read_mask = BIT(6),
 	.status_ch_mask = GENMASK(3, 0),
···
 			return -EINVAL;
 		}
 	case IIO_CHAN_INFO_SAMP_FREQ:
-		reg = st->channels[chan->address].cfg.odr;
+		if (st->channels[chan->address].cfg.filter_type == AD7173_FILTER_SINC3) {
+			/* Inverse operation of ad7173_sinc3_odr_div_from_odr() */
+			*val = MEGA;
+			*val2 = 3 * 32 * st->channels[chan->address].cfg.sinc3_odr_div;
+			return IIO_VAL_FRACTIONAL;
+		}
+
+		reg = st->channels[chan->address].cfg.sinc5_odr_index;
 
 		*val = st->info->sinc5_data_rates[reg] / MILLI;
 		*val2 = (st->info->sinc5_data_rates[reg] % MILLI) * (MICRO / MILLI);
···
 	 *
 	 * This will cause the reading of CH1 to be actually done once every
 	 * 200.16ms, an effective rate of 4.99sps.
+	 *
+	 * Both the sinc5 and sinc3 rates are set here so that if the filter
+	 * type is changed, the requested rate will still be set (aside from
+	 * rounding differences).
 	 */
 	case IIO_CHAN_INFO_SAMP_FREQ:
 		freq = val * MILLI + val2 / MILLI;
···
 				break;
 
 		cfg = &st->channels[chan->address].cfg;
-		cfg->odr = i;
+		cfg->sinc5_odr_index = i;
+		cfg->sinc3_odr_div = ad7173_sinc3_odr_div_from_odr(freq);
 		cfg->live = false;
 		break;
 
···
 				   const unsigned long *scan_mask)
 {
 	struct ad7173_state *st = iio_priv(indio_dev);
+	u16 sinc3_count = 0;
+	u16 sinc3_div = 0;
 	int i, j, k, ret;
 
 	for (i = 0; i < indio_dev->num_channels; i++) {
-		if (test_bit(i, scan_mask))
+		const struct ad7173_channel_config *cfg = &st->channels[i].cfg;
+
+		if (test_bit(i, scan_mask)) {
+			if (cfg->filter_type == AD7173_FILTER_SINC3) {
+				sinc3_count++;
+
+				if (sinc3_div == 0) {
+					sinc3_div = cfg->sinc3_odr_div;
+				} else if (sinc3_div != cfg->sinc3_odr_div) {
+					dev_err(&st->sd.spi->dev,
+						"All enabled channels must have the same sampling_frequency for sinc3 filter_type\n");
+					return -EINVAL;
+				}
+			}
+
 			ret = ad7173_set_channel(&st->sd, i);
-		else
+		} else {
 			ret = ad_sd_write_reg(&st->sd, AD7173_REG_CH(i), 2, 0);
+		}
 		if (ret < 0)
 			return ret;
+	}
+
+	if (sinc3_count && sinc3_count < bitmap_weight(scan_mask, indio_dev->num_channels)) {
+		dev_err(&st->sd.spi->dev,
+			"All enabled channels must have sinc3 filter_type\n");
+		return -EINVAL;
 	}
 
 	/*
···
 		.storagebits = 32,
 		.endianness = IIO_BE,
 	},
-	.ext_info = ad7173_calibsys_ext_info,
+	.ext_info = ad7173_chan_spec_ext_info,
 };
 
 static const struct iio_chan_spec ad7173_temp_iio_channel_template = {
···
 		.storagebits = 32,
 		.endianness = IIO_BE,
 	},
+	.ext_info = ad7173_temp_chan_spec_ext_info,
 };
 
 static void ad7173_disable_regulators(void *data)
···
 		chan_st_priv->cfg.bipolar = false;
 		chan_st_priv->cfg.input_buf = st->info->has_input_buf;
 		chan_st_priv->cfg.ref_sel = AD7173_SETUP_REF_SEL_INT_REF;
-		chan_st_priv->cfg.odr = st->info->odr_start_value;
+		chan_st_priv->cfg.sinc3_odr_div = ad7173_sinc3_odr_div_from_odr(
+			st->info->sinc5_data_rates[st->info->odr_start_value]
+		);
+		chan_st_priv->cfg.sinc5_odr_index = st->info->odr_start_value;
+		chan_st_priv->cfg.filter_type = AD7173_FILTER_SINC5_SINC1;
 		chan_st_priv->cfg.openwire_comp_chan = -1;
 		st->adc_mode |= AD7173_ADC_MODE_REF_EN;
 		if (st->info->data_reg_only_16bit)
 			chan_arr[chan_index].scan_type = ad4113_scan_type;
+
+		if (ad_sigma_delta_has_spi_offload(&st->sd)) {
+			chan_arr[chan_index].scan_type.storagebits = 32;
+			chan_arr[chan_index].scan_type.endianness = IIO_CPU;
+		}
 
 		chan_index++;
 	}
···
 		chan->scan_index = chan_index;
 		chan->channel = ain[0];
 		chan_st_priv->cfg.input_buf = st->info->has_input_buf;
-		chan_st_priv->cfg.odr = st->info->odr_start_value;
+		chan_st_priv->cfg.sinc3_odr_div = ad7173_sinc3_odr_div_from_odr(
+			st->info->sinc5_data_rates[st->info->odr_start_value]
+		);
+		chan_st_priv->cfg.sinc5_odr_index = st->info->odr_start_value;
+		chan_st_priv->cfg.filter_type = AD7173_FILTER_SINC5_SINC1;
 		chan_st_priv->cfg.openwire_comp_chan = -1;
 
 		chan_st_priv->cfg.bipolar = fwnode_property_read_bool(child, "bipolar");
···
 
 		if (st->info->data_reg_only_16bit)
 			chan_arr[chan_index].scan_type = ad4113_scan_type;
+
+		/* Assuming SPI offload is ad411x_ad717x HDL project. */
+		if (ad_sigma_delta_has_spi_offload(&st->sd)) {
+			chan_arr[chan_index].scan_type.storagebits = 32;
+			chan_arr[chan_index].scan_type.endianness = IIO_CPU;
+		}
 
 		chan_index++;
 	}
···
 
 	ret = devm_add_action_or_reset(dev, ad7173_disable_regulators, st);
 	if (ret)
-		return dev_err_probe(dev, ret,
-				     "Failed to add regulators disable action\n");
+		return ret;
 
 	ret = device_property_match_property_string(dev, "clock-names",
 						    ad7173_clk_sel,

drivers/iio/adc/ad7476.c

···
  * Copyright 2010 Analog Devices Inc.
  */
 
+#include <linux/bitops.h>
 #include <linux/device.h>
 #include <linux/kernel.h>
 #include <linux/slab.h>
···
 struct ad7476_state;
 
 struct ad7476_chip_info {
-	unsigned int			int_vref_uv;
+	unsigned int			int_vref_mv;
 	struct iio_chan_spec		channel[2];
-	/* channels used when convst gpio is defined */
-	struct iio_chan_spec		convst_channel[2];
 	void (*reset)(struct ad7476_state *);
+	void (*conversion_pre_op)(struct ad7476_state *st);
+	void (*conversion_post_op)(struct ad7476_state *st);
 	bool				has_vref;
 	bool				has_vdrive;
+	bool				convstart_required;
 };
 
 struct ad7476_state {
 	struct spi_device		*spi;
 	const struct ad7476_chip_info	*chip_info;
-	struct regulator		*ref_reg;
 	struct gpio_desc		*convst_gpio;
 	struct spi_transfer		xfer;
 	struct spi_message		msg;
+	struct iio_chan_spec		channel[2];
+	int				scale_mv;
 	/*
 	 * DMA (thus cache coherency maintenance) may require the
 	 * transfer buffers to live in their own cache lines.
···
 	unsigned char data[ALIGN(2, sizeof(s64)) + sizeof(s64)] __aligned(IIO_DMA_MINALIGN);
 };
 
-enum ad7476_supported_device_ids {
-	ID_AD7091,
-	ID_AD7091R,
-	ID_AD7273,
-	ID_AD7274,
-	ID_AD7276,
-	ID_AD7277,
-	ID_AD7278,
-	ID_AD7466,
-	ID_AD7467,
-	ID_AD7468,
-	ID_AD7475,
-	ID_AD7495,
-	ID_AD7940,
-	ID_ADC081S,
-	ID_ADC101S,
-	ID_ADC121S,
-	ID_ADS7866,
-	ID_ADS7867,
-	ID_ADS7868,
-	ID_LTC2314_14,
-};
-
 static void ad7091_convst(struct ad7476_state *st)
 {
 	if (!st->convst_gpio)
 		return;
 
-	gpiod_set_value(st->convst_gpio, 0);
+	gpiod_set_value_cansleep(st->convst_gpio, 0);
 	udelay(1); /* CONVST pulse width: 10 ns min */
-	gpiod_set_value(st->convst_gpio, 1);
+	gpiod_set_value_cansleep(st->convst_gpio, 1);
 	udelay(1); /* Conversion time: 650 ns max */
+}
+
+static void bd79105_convst_disable(struct ad7476_state *st)
+{
+	gpiod_set_value_cansleep(st->convst_gpio, 0);
+}
+
+static void bd79105_convst_enable(struct ad7476_state *st)
+{
+	gpiod_set_value_cansleep(st->convst_gpio, 1);
+	/* Worst case, 2790 ns required for conversion */
+	ndelay(2790);
 }
 
 static irqreturn_t ad7476_trigger_handler(int irq, void  *p)
···
 	struct ad7476_state *st = iio_priv(indio_dev);
 	int b_sent;
 
-	ad7091_convst(st);
+	if (st->chip_info->conversion_pre_op)
+		st->chip_info->conversion_pre_op(st);
 
 	b_sent = spi_sync(st->spi, &st->msg);
 	if (b_sent < 0)
···
 	iio_push_to_buffers_with_ts(indio_dev, st->data, sizeof(st->data),
 				    iio_get_time_ns(indio_dev));
 done:
+	if (st->chip_info->conversion_post_op)
+		st->chip_info->conversion_post_op(st);
 	iio_trigger_notify_done(indio_dev->trig);
 
 	return IRQ_HANDLED;
···
 {
 	int ret;
 
-	ad7091_convst(st);
+	if (st->chip_info->conversion_pre_op)
+		st->chip_info->conversion_pre_op(st);
 
 	ret = spi_sync(st->spi, &st->msg);
 	if (ret)
 		return ret;
+
+	if (st->chip_info->conversion_post_op)
+		st->chip_info->conversion_post_op(st);
 
 	return be16_to_cpup((__be16 *)st->data);
 }
···
 {
 	int ret;
 	struct ad7476_state *st = iio_priv(indio_dev);
-	int scale_uv;
 
 	switch (m) {
 	case IIO_CHAN_INFO_RAW:
···
 
 		if (ret < 0)
 			return ret;
-		*val = (ret >> st->chip_info->channel[0].scan_type.shift) &
-			GENMASK(st->chip_info->channel[0].scan_type.realbits - 1, 0);
+		*val = (ret >> chan->scan_type.shift) &
+			GENMASK(chan->scan_type.realbits - 1, 0);
 		return IIO_VAL_INT;
 	case IIO_CHAN_INFO_SCALE:
-		if (st->ref_reg) {
-			scale_uv = regulator_get_voltage(st->ref_reg);
-			if (scale_uv < 0)
-				return scale_uv;
-		} else {
-			scale_uv = st->chip_info->int_vref_uv;
-		}
-		*val = scale_uv / 1000;
+		*val = st->scale_mv;
 		*val2 = chan->scan_type.realbits;
 		return IIO_VAL_FRACTIONAL_LOG2;
 	}
···
 #define AD7940_CHAN(bits) _AD7476_CHAN((bits), 15 - (bits), \
 		BIT(IIO_CHAN_INFO_RAW))
 #define AD7091R_CHAN(bits) _AD7476_CHAN((bits), 16 - (bits), 0)
-#define AD7091R_CONVST_CHAN(bits) _AD7476_CHAN((bits), 16 - (bits), \
-		BIT(IIO_CHAN_INFO_RAW))
 #define ADS786X_CHAN(bits) _AD7476_CHAN((bits), 12 - (bits), \
 		BIT(IIO_CHAN_INFO_RAW))
 
-static const struct ad7476_chip_info ad7476_chip_info_tbl[] = {
-	[ID_AD7091] = {
-		.channel[0] = AD7091R_CHAN(12),
-		.channel[1] = IIO_CHAN_SOFT_TIMESTAMP(1),
-		.convst_channel[0] = AD7091R_CONVST_CHAN(12),
-		.convst_channel[1] = IIO_CHAN_SOFT_TIMESTAMP(1),
-		.reset = ad7091_reset,
-	},
-	[ID_AD7091R] = {
-		.channel[0] = AD7091R_CHAN(12),
-		.channel[1] = IIO_CHAN_SOFT_TIMESTAMP(1),
-		.convst_channel[0] = AD7091R_CONVST_CHAN(12),
-		.convst_channel[1] = IIO_CHAN_SOFT_TIMESTAMP(1),
-		.int_vref_uv = 2500000,
-		.has_vref = true,
-		.reset = ad7091_reset,
-	},
-	[ID_AD7273] = {
-		.channel[0] = AD7940_CHAN(10),
-		.channel[1] = IIO_CHAN_SOFT_TIMESTAMP(1),
-		.has_vref = true,
-	},
-	[ID_AD7274] = {
-		.channel[0] = AD7940_CHAN(12),
-		.channel[1] = IIO_CHAN_SOFT_TIMESTAMP(1),
-		.has_vref = true,
-	},
-	[ID_AD7276] = {
-		.channel[0] = AD7940_CHAN(12),
-		.channel[1] = IIO_CHAN_SOFT_TIMESTAMP(1),
-	},
-	[ID_AD7277] = {
-		.channel[0] = AD7940_CHAN(10),
-		.channel[1] = IIO_CHAN_SOFT_TIMESTAMP(1),
-	},
-	[ID_AD7278] = {
-		.channel[0] = AD7940_CHAN(8),
-		.channel[1] = IIO_CHAN_SOFT_TIMESTAMP(1),
-	},
-	[ID_AD7466] = {
-		.channel[0] = AD7476_CHAN(12),
-		.channel[1] = IIO_CHAN_SOFT_TIMESTAMP(1),
-	},
-	[ID_AD7467] = {
-		.channel[0] = AD7476_CHAN(10),
-		.channel[1] = IIO_CHAN_SOFT_TIMESTAMP(1),
-	},
-	[ID_AD7468] = {
-		.channel[0] = AD7476_CHAN(8),
-		.channel[1] = IIO_CHAN_SOFT_TIMESTAMP(1),
-	},
-	[ID_AD7475] = {
-		.channel[0] = AD7476_CHAN(12),
-		.channel[1] = IIO_CHAN_SOFT_TIMESTAMP(1),
-		.has_vref = true,
-		.has_vdrive = true,
-	},
-	[ID_AD7495] = {
-		.channel[0] = AD7476_CHAN(12),
-		.channel[1] = IIO_CHAN_SOFT_TIMESTAMP(1),
-		.int_vref_uv = 2500000,
-		.has_vdrive = true,
-	},
-	[ID_AD7940] = {
-		.channel[0] = AD7940_CHAN(14),
-		.channel[1] = IIO_CHAN_SOFT_TIMESTAMP(1),
-	},
-	[ID_ADC081S] = {
-		.channel[0] = ADC081S_CHAN(8),
-		.channel[1] = IIO_CHAN_SOFT_TIMESTAMP(1),
-	},
-	[ID_ADC101S] = {
-		.channel[0] = ADC081S_CHAN(10),
-		.channel[1] = IIO_CHAN_SOFT_TIMESTAMP(1),
-	},
-	[ID_ADC121S] = {
-		.channel[0] = ADC081S_CHAN(12),
-		.channel[1] = IIO_CHAN_SOFT_TIMESTAMP(1),
-	},
-	[ID_ADS7866] = {
-		.channel[0] = ADS786X_CHAN(12),
-		.channel[1] = IIO_CHAN_SOFT_TIMESTAMP(1),
-	},
-	[ID_ADS7867] = {
-		.channel[0] = ADS786X_CHAN(10),
-		.channel[1] = IIO_CHAN_SOFT_TIMESTAMP(1),
-	},
-	[ID_ADS7868] = {
-		.channel[0] = ADS786X_CHAN(8),
-		.channel[1] = IIO_CHAN_SOFT_TIMESTAMP(1),
-	},
-	[ID_LTC2314_14] = {
-		.channel[0] = AD7940_CHAN(14),
-		.channel[1] = IIO_CHAN_SOFT_TIMESTAMP(1),
-		.has_vref = true,
-	},
+static const struct ad7476_chip_info ad7091_chip_info = {
+	.channel[0] = AD7091R_CHAN(12),
+	.channel[1] = IIO_CHAN_SOFT_TIMESTAMP(1),
+	.conversion_pre_op = ad7091_convst,
+	.reset = ad7091_reset,
+};
+
+static const struct ad7476_chip_info ad7091r_chip_info = {
+	.channel[0] = AD7091R_CHAN(12),
+	.channel[1] = IIO_CHAN_SOFT_TIMESTAMP(1),
+	.conversion_pre_op = ad7091_convst,
+	.int_vref_mv = 2500,
+	.has_vref = true,
+	.reset = ad7091_reset,
+};
+
+static const struct ad7476_chip_info ad7273_chip_info = {
+	.channel[0] = AD7940_CHAN(10),
+	.channel[1] = IIO_CHAN_SOFT_TIMESTAMP(1),
+	.has_vref = true,
+};
+
+static const struct ad7476_chip_info ad7274_chip_info = {
+	.channel[0] = AD7940_CHAN(12),
+	.channel[1] = IIO_CHAN_SOFT_TIMESTAMP(1),
+	.has_vref = true,
+};
+
+static const struct ad7476_chip_info ad7276_chip_info = {
+	.channel[0] = AD7940_CHAN(12),
+	.channel[1] = IIO_CHAN_SOFT_TIMESTAMP(1),
+};
+
+static const struct ad7476_chip_info ad7277_chip_info = {
+	.channel[0] = AD7940_CHAN(10),
+	.channel[1] = IIO_CHAN_SOFT_TIMESTAMP(1),
+};
+
+static const struct ad7476_chip_info ad7278_chip_info = {
+	.channel[0] = AD7940_CHAN(8),
+	.channel[1] = IIO_CHAN_SOFT_TIMESTAMP(1),
+};
+
+static const struct ad7476_chip_info ad7466_chip_info = {
+	.channel[0] = AD7476_CHAN(12),
+	.channel[1] = IIO_CHAN_SOFT_TIMESTAMP(1),
+};
+
+static const struct ad7476_chip_info ad7467_chip_info = {
+	.channel[0] = AD7476_CHAN(10),
+	.channel[1] = IIO_CHAN_SOFT_TIMESTAMP(1),
+};
+
+static const struct ad7476_chip_info ad7468_chip_info = {
+	.channel[0] = AD7476_CHAN(8),
+	.channel[1] = IIO_CHAN_SOFT_TIMESTAMP(1),
+};
+
+static const struct ad7476_chip_info ad7475_chip_info = {
+	.channel[0] = AD7476_CHAN(12),
+	.channel[1] = IIO_CHAN_SOFT_TIMESTAMP(1),
+	.has_vref = true,
+	.has_vdrive = true,
+};
+
+static const struct ad7476_chip_info ad7495_chip_info = {
+	.channel[0] = AD7476_CHAN(12),
+	.channel[1] = IIO_CHAN_SOFT_TIMESTAMP(1),
+	.int_vref_mv = 2500,
+	.has_vdrive = true,
+};
+
+static const struct ad7476_chip_info ad7940_chip_info = {
+	.channel[0] = AD7940_CHAN(14),
+	.channel[1] = IIO_CHAN_SOFT_TIMESTAMP(1),
+};
+
+static const struct ad7476_chip_info adc081s_chip_info = {
+	.channel[0] = ADC081S_CHAN(8),
+	.channel[1] = IIO_CHAN_SOFT_TIMESTAMP(1),
+};
+
+static const struct ad7476_chip_info adc101s_chip_info = {
+	.channel[0] = ADC081S_CHAN(10),
+	.channel[1] = IIO_CHAN_SOFT_TIMESTAMP(1),
+};
+
+static const struct ad7476_chip_info adc121s_chip_info = {
+	.channel[0] = ADC081S_CHAN(12),
+	.channel[1] = IIO_CHAN_SOFT_TIMESTAMP(1),
+};
+
+static const struct ad7476_chip_info ads7866_chip_info = {
+	.channel[0] = ADS786X_CHAN(12),
+	.channel[1] = IIO_CHAN_SOFT_TIMESTAMP(1),
+};
+
+static const struct ad7476_chip_info ads7867_chip_info = {
+	.channel[0] = ADS786X_CHAN(10),
+	.channel[1] = IIO_CHAN_SOFT_TIMESTAMP(1),
+};
+
+static const struct ad7476_chip_info ads7868_chip_info = {
+	.channel[0] = ADS786X_CHAN(8),
+	.channel[1] = IIO_CHAN_SOFT_TIMESTAMP(1),
+};
+
+static const struct ad7476_chip_info ltc2314_14_chip_info = {
+	.channel[0] = AD7940_CHAN(14),
+	.channel[1] = IIO_CHAN_SOFT_TIMESTAMP(1),
+	.has_vref = true,
+};
+
+static const struct ad7476_chip_info bd79105_chip_info = {
+	.channel[0] = AD7091R_CHAN(16),
+	.channel[1] = IIO_CHAN_SOFT_TIMESTAMP(1),
+	/*
+	 * The BD79105 starts ADC data conversion when the CONVSTART line is
+	 * set HIGH. The CONVSTART must be kept HIGH until the data has been
+	 * read from the ADC.
+	 */
+	.conversion_pre_op = bd79105_convst_enable,
+	.conversion_post_op = bd79105_convst_disable,
+	/* BD79105 won't do conversion without convstart */
+	.convstart_required = true,
+	.has_vref = true,
+	.has_vdrive = true,
 };
 
 static const struct iio_info ad7476_info = {
 	.read_raw = &ad7476_read_raw,
 };
 
-static void ad7476_reg_disable(void *data)
-{
-	struct regulator *reg = data;
-
-	regulator_disable(reg);
-}
-
 static int ad7476_probe(struct spi_device *spi)
 {
 	struct ad7476_state *st;
 	struct iio_dev *indio_dev;
-	struct regulator *reg;
+	unsigned int i;
 	int ret;
 
 	indio_dev = devm_iio_device_alloc(&spi->dev, sizeof(*st));
···
 		return -ENOMEM;
 
 	st = iio_priv(indio_dev);
-	st->chip_info =
-		&ad7476_chip_info_tbl[spi_get_device_id(spi)->driver_data];
 
-	reg = devm_regulator_get(&spi->dev, "vcc");
-	if (IS_ERR(reg))
-		return PTR_ERR(reg);
+	st->chip_info = spi_get_device_match_data(spi);
+	if (!st->chip_info)
+		return -ENODEV;
 
-	ret = regulator_enable(reg);
-	if (ret)
-		return ret;
-
-	ret = devm_add_action_or_reset(&spi->dev, ad7476_reg_disable, reg);
-	if (ret)
-		return ret;
-
-	/* Either vcc or vref (below) as appropriate */
-	if (!st->chip_info->int_vref_uv)
-		st->ref_reg = reg;
+	/* Use VCC for reference voltage if vref / internal vref aren't used */
+	if (!st->chip_info->int_vref_mv && !st->chip_info->has_vref) {
+		ret = devm_regulator_get_enable_read_voltage(&spi->dev, "vcc");
+		if (ret < 0)
+			return ret;
+		st->scale_mv = ret / 1000;
+	} else {
+		ret = devm_regulator_get_enable(&spi->dev, "vcc");
+		if (ret < 0)
+			return ret;
+	}
 
 	if (st->chip_info->has_vref) {
-
-		/* If a device has an internal reference vref is optional */
-		if (st->chip_info->int_vref_uv) {
-			reg = devm_regulator_get_optional(&spi->dev, "vref");
-			if (IS_ERR(reg) && (PTR_ERR(reg) != -ENODEV))
-				return PTR_ERR(reg);
-		} else {
-			reg = devm_regulator_get(&spi->dev, "vref");
-			if (IS_ERR(reg))
-				return PTR_ERR(reg);
-		}
-
-		if (!IS_ERR(reg)) {
-			ret = regulator_enable(reg);
-			if (ret)
+		ret = devm_regulator_get_enable_read_voltage(&spi->dev, "vref");
+		if (ret < 0) {
+			/* Vref is optional if a device has an internal reference */
+			if (!st->chip_info->int_vref_mv || ret != -ENODEV)
 				return ret;
-
-			ret = devm_add_action_or_reset(&spi->dev,
-						       ad7476_reg_disable,
-						       reg);
-			if (ret)
-				return ret;
-			st->ref_reg = reg;
 		} else {
-			/*
-			 * Can only get here if device supports both internal
-			 * and external reference, but the regulator connected
-			 * to the external reference is not connected.
-			 * Set the reference regulator pointer to NULL to
-			 * indicate this.
-			 */
-			st->ref_reg = NULL;
+			st->scale_mv = ret / 1000;
 		}
 	}
+
+	if (!st->scale_mv)
+		st->scale_mv = st->chip_info->int_vref_mv;
 
 	if (st->chip_info->has_vdrive) {
 		ret = devm_regulator_get_enable(&spi->dev, "vdrive");
···
 	if (IS_ERR(st->convst_gpio))
 		return PTR_ERR(st->convst_gpio);
 
+	if (st->chip_info->convstart_required && !st->convst_gpio)
+		return dev_err_probe(&spi->dev, -EINVAL, "No convstart GPIO\n");
+
+	/*
+	 * This will never happen. Unless someone changes the channel specs
+	 * in this driver. And if someone does, without changing the loop
+	 * below, then we'd better immediately produce a big fat error, before
+	 * the change proceeds from that developer's table.
+	 */
+	static_assert(ARRAY_SIZE(st->channel) == ARRAY_SIZE(st->chip_info->channel));
+	for (i = 0; i < ARRAY_SIZE(st->channel); i++) {
+		st->channel[i] = st->chip_info->channel[i];
+		if (st->convst_gpio)
+			__set_bit(IIO_CHAN_INFO_RAW,
+				  &st->channel[i].info_mask_separate);
+	}
+
 	st->spi = spi;
 
 	indio_dev->name = spi_get_device_id(spi)->name;
 	indio_dev->modes = INDIO_DIRECT_MODE;
-	indio_dev->channels = st->chip_info->channel;
-	indio_dev->num_channels = 2;
+	indio_dev->channels = st->channel;
+	indio_dev->num_channels = ARRAY_SIZE(st->channel);
 	indio_dev->info = &ad7476_info;
 
-	if (st->convst_gpio)
-		indio_dev->channels = st->chip_info->convst_channel;
 	/* Setup default message */
 
 	st->xfer.rx_buf = &st->data;
-	st->xfer.len = st->chip_info->channel[0].scan_type.storagebits / 8;
+	st->xfer.len = indio_dev->channels[0].scan_type.storagebits / 8;
 
 	spi_message_init(&st->msg);
 	spi_message_add_tail(&st->xfer, &st->msg);
···
 }
 
 static const struct spi_device_id ad7476_id[] = {
-	{ "ad7091", ID_AD7091 },
-	{ "ad7091r", ID_AD7091R },
-	{ "ad7273", ID_AD7273 },
-	{ "ad7274", ID_AD7274 },
-	{ "ad7276", ID_AD7276},
-	{ "ad7277", ID_AD7277 },
-	{ "ad7278", ID_AD7278 },
-	{ "ad7466", ID_AD7466 },
-	{ "ad7467", ID_AD7467 },
-	{ "ad7468", ID_AD7468 },
-	{ "ad7475", ID_AD7475 },
-	{ "ad7476", ID_AD7466 },
-	{ "ad7476a", ID_AD7466 },
-	{ "ad7477", ID_AD7467 },
-	{ "ad7477a", ID_AD7467 },
-	{ "ad7478", ID_AD7468 },
-	{ "ad7478a", ID_AD7468 },
-	{ "ad7495", ID_AD7495 },
-	{ "ad7910", ID_AD7467 },
-	{ "ad7920", ID_AD7466 },
-	{ "ad7940", ID_AD7940 },
-	{ "adc081s", ID_ADC081S },
-	{ "adc101s", ID_ADC101S },
-	{ "adc121s", ID_ADC121S },
-	{ "ads7866", ID_ADS7866 },
-	{ "ads7867", ID_ADS7867 },
-	{ "ads7868", ID_ADS7868 },
+	{ "ad7091", (kernel_ulong_t)&ad7091_chip_info },
+	{ "ad7091r", (kernel_ulong_t)&ad7091r_chip_info },
+	{ "ad7273", (kernel_ulong_t)&ad7273_chip_info },
+	{ "ad7274", (kernel_ulong_t)&ad7274_chip_info },
+	{ "ad7276", (kernel_ulong_t)&ad7276_chip_info },
+	{ "ad7277", (kernel_ulong_t)&ad7277_chip_info },
+	{ "ad7278", (kernel_ulong_t)&ad7278_chip_info },
+	{ "ad7466", (kernel_ulong_t)&ad7466_chip_info },
+	{ "ad7467", (kernel_ulong_t)&ad7467_chip_info },
+	{ "ad7468", (kernel_ulong_t)&ad7468_chip_info },
+	{ "ad7475", (kernel_ulong_t)&ad7475_chip_info },
+	{ "ad7476", (kernel_ulong_t)&ad7466_chip_info },
+	{ "ad7476a", (kernel_ulong_t)&ad7466_chip_info },
+	{ "ad7477", (kernel_ulong_t)&ad7467_chip_info },
+	{ "ad7477a", (kernel_ulong_t)&ad7467_chip_info },
+	{ "ad7478", (kernel_ulong_t)&ad7468_chip_info },
+	{ "ad7478a", (kernel_ulong_t)&ad7468_chip_info },
+	{ "ad7495", (kernel_ulong_t)&ad7495_chip_info },
+	{ "ad7910", (kernel_ulong_t)&ad7467_chip_info },
+	{ "ad7920", (kernel_ulong_t)&ad7466_chip_info },
+	{ "ad7940", (kernel_ulong_t)&ad7940_chip_info },
+	{ "adc081s", (kernel_ulong_t)&adc081s_chip_info },
+	{ "adc101s", (kernel_ulong_t)&adc101s_chip_info },
+	{ "adc121s", (kernel_ulong_t)&adc121s_chip_info },
+	{ "ads7866", (kernel_ulong_t)&ads7866_chip_info },
+	{ "ads7867", (kernel_ulong_t)&ads7867_chip_info },
+	{ "ads7868", (kernel_ulong_t)&ads7868_chip_info },
+	{ "bd79105", (kernel_ulong_t)&bd79105_chip_info },
 	/*
 	 * The ROHM BU79100G is identical to the TI's ADS7866 from the software
 	 * point of view. The binding document mandates the ADS7866 to be
 	 * marked as a fallback for the BU79100G, but we still need the SPI ID
 	 * here to make the module loading work.
 	 */
-	{ "bu79100g", ID_ADS7866 },
-	{ "ltc2314-14", ID_LTC2314_14 },
+	{ "bu79100g", (kernel_ulong_t)&ads7866_chip_info },
+	{ "ltc2314-14", (kernel_ulong_t)&ltc2314_14_chip_info },
 	{ }
 };
 MODULE_DEVICE_TABLE(spi, ad7476_id);

drivers/iio/adc/ad7768-1.c

···
 	struct spi_device *spi;
 	struct regmap *regmap;
 	struct regmap *regmap24;
-	struct regulator *vref;
+	int vref_uv;
 	struct regulator_dev *vcm_rdev;
 	unsigned int vcm_output_sel;
 	struct clk *mclk;
···
 	int ret;
 
 	freq = clamp(freq, 50, 1024000);
-	if (freq == 0)
-		return -EINVAL;
 
 	mclk_div = DIV_ROUND_CLOSEST(st->mclk_freq, freq * st->oversampling_ratio);
 	/* Find the closest match for the desired sampling frequency */
···
 {
 	struct ad7768_state *st = iio_priv(indio_dev);
 	const struct iio_scan_type *scan_type;
-	int scale_uv, ret, temp;
+	int ret, temp;
 
 	scan_type = iio_get_current_scan_type(indio_dev, chan);
 	if (IS_ERR(scan_type))
···
 		return IIO_VAL_INT;
 
 	case IIO_CHAN_INFO_SCALE:
-		scale_uv = regulator_get_voltage(st->vref);
-		if (scale_uv < 0)
-			return scale_uv;
-
-		*val = (scale_uv * 2) / 1000;
+		*val = (st->vref_uv * 2) / 1000;
 		*val2 = scan_type->realbits;
 
 		return IIO_VAL_FRACTIONAL_LOG2;
···
 	.validate_device = iio_trigger_validate_own_device,
 };
 
-static void ad7768_regulator_disable(void *data)
-{
-	struct ad7768_state *st = data;
-
-	regulator_disable(st->vref);
-}
-
 static int ad7768_set_channel_label(struct iio_dev *indio_dev,
 						int num_channels)
 {
···
 		return dev_err_probe(&spi->dev, PTR_ERR(st->regmap24),
 				     "Failed to initialize regmap24");
 
-	st->vref = devm_regulator_get(&spi->dev, "vref");
-	if (IS_ERR(st->vref))
-		return PTR_ERR(st->vref);
-
-	ret = regulator_enable(st->vref);
-	if (ret) {
-		dev_err(&spi->dev, "Failed to enable specified vref supply\n");
-		return ret;
-	}
-
-	ret = devm_add_action_or_reset(&spi->dev, ad7768_regulator_disable, st);
-	if (ret)
-		return ret;
+	ret = devm_regulator_get_enable_read_voltage(&spi->dev, "vref");
+	if (ret < 0)
+		return dev_err_probe(&spi->dev, ret,
+				     "Failed to get VREF voltage\n");
+	st->vref_uv = ret;
 
 	st->mclk = devm_clk_get_enabled(&spi->dev, "mclk");
 	if (IS_ERR(st->mclk))

drivers/iio/adc/ad7779.c

···
 #include <linux/units.h>
 
 #include <linux/iio/iio.h>
+#include <linux/iio/backend.h>
 #include <linux/iio/buffer.h>
 #include <linux/iio/sysfs.h>
 #include <linux/iio/trigger.h>
···
 	struct completion completion;
 	unsigned int sampling_freq;
 	enum ad7779_filter filter_enabled;
+	struct iio_backend *back;
 	/*
 	 * DMA (thus cache coherency maintenance) requires the
 	 * transfer buffers to live in their own cache lines.
···
 	return ret;
 }
 
+static int ad7779_update_scan_mode(struct iio_dev *indio_dev,
+				   const unsigned long *scan_mask)
+{
+	struct ad7779_state *st = iio_priv(indio_dev);
+	unsigned int c;
+	int ret;
+
+	for (c = 0; c < AD7779_NUM_CHANNELS; c++) {
+		if (test_bit(c, scan_mask))
+			ret = iio_backend_chan_enable(st->back, c);
+		else
+			ret = iio_backend_chan_disable(st->back, c);
+		if (ret)
+			return ret;
+	}
+
+	return 0;
+}
+
 static const struct iio_info ad7779_info = {
 	.read_raw = ad7779_read_raw,
 	.write_raw = ad7779_write_raw,
 	.debugfs_reg_access = &ad7779_reg_access,
+};
+
+static const struct iio_info ad7779_info_data = {
+	.read_raw = ad7779_read_raw,
+	.write_raw = ad7779_write_raw,
+	.debugfs_reg_access = &ad7779_reg_access,
+	.update_scan_mode = &ad7779_update_scan_mode,
 };
 
 static const struct iio_enum ad7779_filter_enum = {
···
 	return 0;
 }
 
+static int ad7779_set_data_lines(struct iio_dev *indio_dev, u32 num_lanes)
+{
+	struct ad7779_state *st = iio_priv(indio_dev);
+	int ret;
+
+	if (num_lanes != 1 && num_lanes != 2 && num_lanes != 4)
+		return -EINVAL;
+
+	ret = ad7779_set_sampling_frequency(st, num_lanes * AD7779_DEFAULT_SAMPLING_1LINE);
+	if (ret)
+		return ret;
+
+	ret = iio_backend_num_lanes_set(st->back, num_lanes);
+	if (ret)
+		return ret;
+
+	return ad7779_spi_write_mask(st, AD7779_REG_DOUT_FORMAT,
+				     AD7779_DOUT_FORMAT_MSK,
+				     FIELD_PREP(AD7779_DOUT_FORMAT_MSK, 2 - ilog2(num_lanes)));
+}
+
+static int ad7779_setup_channels(struct iio_dev *indio_dev, const struct ad7779_state *st)
+{
+	struct iio_chan_spec *channels;
+	struct device *dev = &st->spi->dev;
+
+	channels = devm_kmemdup_array(dev, st->chip_info->channels,
+				      ARRAY_SIZE(ad7779_channels),
+				      sizeof(*channels), GFP_KERNEL);
+	if (!channels)
+		return -ENOMEM;
+
+	for (unsigned int i = 0; i < ARRAY_SIZE(ad7779_channels); i++)
+		channels[i].scan_type.endianness = IIO_CPU;
+
+	indio_dev->channels = channels;
+	indio_dev->num_channels = ARRAY_SIZE(ad7779_channels);
+
+	return 0;
+}
+
+static int ad7779_setup_without_backend(struct ad7779_state *st, struct iio_dev *indio_dev)
+{
+	int ret;
+	struct device *dev = &st->spi->dev;
+
+	indio_dev->info = &ad7779_info;
+	indio_dev->channels = st->chip_info->channels;
+	indio_dev->num_channels = ARRAY_SIZE(ad7779_channels);
+
+	st->trig = devm_iio_trigger_alloc(dev, "%s-dev%d", indio_dev->name,
+					  iio_device_id(indio_dev));
+	if (!st->trig)
+		return -ENOMEM;
+
+	st->trig->ops = &ad7779_trigger_ops;
+
+	iio_trigger_set_drvdata(st->trig, st);
+
+	ret = devm_request_irq(dev, st->spi->irq, iio_trigger_generic_data_rdy_poll,
+			       IRQF_ONESHOT | IRQF_NO_AUTOEN, indio_dev->name,
+			       st->trig);
+	if (ret)
+		return dev_err_probe(dev, ret, "request IRQ %d failed\n",
+				     st->spi->irq);
+
+	ret = devm_iio_trigger_register(dev, st->trig);
+	if (ret)
+		return ret;
+
+	indio_dev->trig = iio_trigger_get(st->trig);
+
+	init_completion(&st->completion);
+
+	ret = devm_iio_triggered_buffer_setup(dev, indio_dev,
+					      &iio_pollfunc_store_time,
+					      &ad7779_trigger_handler,
+					      &ad7779_buffer_setup_ops);
+	if (ret)
+		return ret;
+
+	return ad7779_spi_write_mask(st, AD7779_REG_DOUT_FORMAT,
+				     AD7779_DCLK_CLK_DIV_MSK,
+				     FIELD_PREP(AD7779_DCLK_CLK_DIV_MSK, 7));
+}
+
+static int ad7779_setup_backend(struct ad7779_state *st, struct iio_dev *indio_dev)
+{
+	struct device *dev = &st->spi->dev;
+	int ret;
+	u32 num_lanes;
+
+	indio_dev->info = &ad7779_info_data;
+
+	ret = ad7779_setup_channels(indio_dev, st);
+	if (ret)
+		return ret;
+
+	st->back = devm_iio_backend_get(dev, NULL);
+	if (IS_ERR(st->back))
+		return dev_err_probe(dev, PTR_ERR(st->back),
+				     "failed to get iio backend");
+
+	ret = devm_iio_backend_request_buffer(dev, st->back, indio_dev);
+	if (ret)
+		return ret;
+
+	ret = devm_iio_backend_enable(dev, st->back);
+	if (ret)
+		return ret;
+
+	num_lanes = 4;
+	ret = device_property_read_u32(dev, "adi,num-lanes", &num_lanes);
+	if (ret && ret != -EINVAL)
+		return ret;
+
+	return ad7779_set_data_lines(indio_dev, num_lanes);
+}
+
 static int ad7779_probe(struct spi_device *spi)
 {
 	struct iio_dev *indio_dev;
···
 	struct gpio_desc *reset_gpio, *start_gpio;
 	struct device *dev = &spi->dev;
 	int ret = -EINVAL;
-
-	if (!spi->irq)
-		return dev_err_probe(dev, ret, "DRDY irq not present\n");
 
 	indio_dev = devm_iio_device_alloc(dev, sizeof(*st));
 	if (!indio_dev)
···
 		return ret;
 
 	indio_dev->name = st->chip_info->name;
-	indio_dev->info = &ad7779_info;
 	indio_dev->modes = INDIO_DIRECT_MODE;
-	indio_dev->channels = st->chip_info->channels;
-	indio_dev->num_channels = ARRAY_SIZE(ad7779_channels);
 
-	st->trig = devm_iio_trigger_alloc(dev, "%s-dev%d", indio_dev->name,
-					  iio_device_id(indio_dev));
-	if (!st->trig)
-		return -ENOMEM;
-
-	st->trig->ops = &ad7779_trigger_ops;
-
-	iio_trigger_set_drvdata(st->trig, st);
-
-	ret = devm_request_irq(dev, spi->irq, iio_trigger_generic_data_rdy_poll,
-			       IRQF_ONESHOT | IRQF_NO_AUTOEN, indio_dev->name,
-			       st->trig);
-	if (ret)
-		return dev_err_probe(dev, ret, "request IRQ %d failed\n",
-				     st->spi->irq);
-
-	ret = devm_iio_trigger_register(dev, st->trig);
-	if (ret)
-		return ret;
-
-	indio_dev->trig = iio_trigger_get(st->trig);
-
-	init_completion(&st->completion);
-
-	ret = devm_iio_triggered_buffer_setup(dev, indio_dev,
-					      &iio_pollfunc_store_time,
-					      &ad7779_trigger_handler,
-					      &ad7779_buffer_setup_ops);
-	if (ret)
-		return ret;
-
-	ret = ad7779_spi_write_mask(st, AD7779_REG_DOUT_FORMAT,
-				    AD7779_DCLK_CLK_DIV_MSK,
-				    FIELD_PREP(AD7779_DCLK_CLK_DIV_MSK, 7));
+	if (device_property_present(dev, "io-backends"))
+		ret = ad7779_setup_backend(st, indio_dev);
+	else
+		ret = ad7779_setup_without_backend(st, indio_dev);
 	if (ret)
 		return ret;
 
···
 MODULE_AUTHOR("Ramona Alexandra Nechita <[e-mail]>");
 MODULE_DESCRIPTION("Analog Devices AD7779 ADC");
 MODULE_LICENSE("GPL");
+MODULE_IMPORT_NS("IIO_BACKEND");

drivers/iio/adc/ad7949.c

···
 	int ret;
 
 	indio_dev = devm_iio_device_alloc(dev, sizeof(*ad7949_adc));
-	if (!indio_dev) {
-		dev_err(dev, "can not allocate iio device\n");
+	if (!indio_dev)
 		return -ENOMEM;
-	}
 
 	indio_dev->info = &ad7949_spi_info;
 	indio_dev->name = spi_get_device_id(spi)->name;

drivers/iio/adc/ad799x.c

···
  * @num_channels:	number of channels
  * @noirq_config:	device configuration w/o IRQ
  * @irq_config:		device configuration w/IRQ
+ * @has_vref:		device supports external reference voltage
  */
 struct ad799x_chip_info {
 	int				num_channels;
 	const struct ad799x_chip_config	noirq_config;
 	const struct ad799x_chip_config	irq_config;
+	bool has_vref;
 };
 
 struct ad799x_state {
···
 static const struct ad799x_chip_info ad799x_chip_info_tbl[] = {
 	[ad7991] = {
 		.num_channels = 5,
+		.has_vref = true,
 		.noirq_config = {
 			.channel = {
 				AD799X_CHANNEL(0, 12),
···
 	},
 	[ad7995] = {
 		.num_channels = 5,
+		.has_vref = true,
 		.noirq_config = {
 			.channel = {
 				AD799X_CHANNEL(0, 10),
···
 	},
 	[ad7999] = {
 		.num_channels = 5,
+		.has_vref = true,
 		.noirq_config = {
 			.channel = {
 				AD799X_CHANNEL(0, 8),
···
 	},
 	[ad7994] = {
 		.num_channels = 5,
+		.has_vref = true,
 		.noirq_config = {
 			.channel = {
 				AD799X_CHANNEL(0, 12),
···
 		return ret;
 
 	/* check if an external reference is supplied */
-	st->vref = devm_regulator_get_optional(&client->dev, "vref");
-
-	if (IS_ERR(st->vref)) {
-		if (PTR_ERR(st->vref) == -ENODEV) {
+	if (chip_info->has_vref) {
+		st->vref = devm_regulator_get_optional(&client->dev, "vref");
+		ret = PTR_ERR_OR_ZERO(st->vref);
+		if (ret) {
+			if (ret != -ENODEV)
+				goto error_disable_reg;
 			st->vref = NULL;
 			dev_info(&client->dev, "Using VCC reference voltage\n");
-		} else {
-			ret = PTR_ERR(st->vref);
-			goto error_disable_reg;
 		}
-	}
 
-	if (st->vref) {
-		/*
-		 * Use external reference voltage if supported by hardware.
-		 * This is optional if voltage / regulator present, use VCC otherwise.
-		 */
-		if ((st->id == ad7991) || (st->id == ad7995) || (st->id == ad7999)) {
+		if (st->vref) {
 			dev_info(&client->dev, "Using external reference voltage\n");
 			extra_config |= AD7991_REF_SEL;
 			ret = regulator_enable(st->vref);
 			if (ret)
 				goto error_disable_reg;
-		} else {
-			st->vref = NULL;
-			dev_warn(&client->dev, "Supplied reference not supported\n");
 		}
 	}
 

drivers/iio/adc/ade9000.c

···
+// SPDX-License-Identifier: GPL-2.0-only
+/**
+ * ADE9000 driver
+ *
+ * Copyright 2025 Analog Devices Inc.
+ */
+
+#include <linux/bitfield.h>
+#include <linux/clk.h>
+#include <linux/clk-provider.h>
+#include <linux/completion.h>
+#include <linux/delay.h>
+#include <linux/gpio/consumer.h>
+#include <linux/iio/iio.h>
+#include <linux/iio/buffer.h>
+#include <linux/iio/kfifo_buf.h>
+#include <linux/iio/events.h>
+#include <linux/interrupt.h>
+#include <linux/minmax.h>
+#include <linux/module.h>
+#include <linux/property.h>
+#include <linux/regmap.h>
+#include <linux/regulator/consumer.h>
+#include <linux/spi/spi.h>
+#include <linux/unaligned.h>
+
+/* Address of ADE9000 registers */
+#define ADE9000_REG_AIGAIN		0x000
+#define ADE9000_REG_AVGAIN		0x00B
+#define ADE9000_REG_AIRMSOS		0x00C
+#define ADE9000_REG_AVRMSOS		0x00D
+#define ADE9000_REG_APGAIN		0x00E
+#define ADE9000_REG_AWATTOS		0x00F
+#define ADE9000_REG_AVAROS		0x010
+#define ADE9000_REG_AFVAROS		0x012
+#define ADE9000_REG_CONFIG0		0x060
+#define ADE9000_REG_DICOEFF		0x072
+#define ADE9000_REG_AI_PCF		0x20A
+#define ADE9000_REG_AV_PCF		0x20B
+#define ADE9000_REG_AIRMS		0x20C
+#define ADE9000_REG_AVRMS		0x20D
+#define ADE9000_REG_AWATT		0x210
+#define ADE9000_REG_AVAR		0x211
+#define ADE9000_REG_AVA			0x212
+#define ADE9000_REG_AFVAR		0x214
+#define ADE9000_REG_APF			0x216
+#define ADE9000_REG_BI_PCF		0x22A
+#define ADE9000_REG_BV_PCF		0x22B
+#define ADE9000_REG_BIRMS		0x22C
+#define ADE9000_REG_BVRMS		0x22D
+#define ADE9000_REG_CI_PCF		0x24A
+#define ADE9000_REG_CV_PCF		0x24B
+#define ADE9000_REG_CIRMS		0x24C
+#define ADE9000_REG_CVRMS		0x24D
+#define ADE9000_REG_AWATT_ACC		0x2E5
+#define ADE9000_REG_AWATTHR_LO		0x2E6
+#define ADE9000_REG_AVAHR_LO		0x2FA
+#define ADE9000_REG_AFVARHR_LO		0x30E
+#define ADE9000_REG_BWATTHR_LO		0x322
+#define ADE9000_REG_BVAHR_LO		0x336
+#define ADE9000_REG_BFVARHR_LO		0x34A
+#define ADE9000_REG_CWATTHR_LO		0x35E
+#define ADE9000_REG_CVAHR_LO		0x372
+#define ADE9000_REG_CFVARHR_LO		0x386
+#define ADE9000_REG_STATUS0		0x402
+#define ADE9000_REG_STATUS1		0x403
+#define ADE9000_REG_MASK0		0x405
+#define ADE9000_REG_MASK1		0x406
+#define ADE9000_REG_EVENT_MASK		0x407
+#define ADE9000_REG_VLEVEL		0x40F
+#define ADE9000_REG_DIP_LVL		0x410
+#define ADE9000_REG_DIPA		0x411
+#define ADE9000_REG_DIPB		0x412
+#define ADE9000_REG_DIPC		0x413
+#define ADE9000_REG_SWELL_LVL		0x414
+#define ADE9000_REG_SWELLA		0x415
+#define ADE9000_REG_SWELLB		0x416
+#define ADE9000_REG_SWELLC		0x417
+#define ADE9000_REG_APERIOD		0x418
+#define ADE9000_REG_BPERIOD		0x419
+#define ADE9000_REG_CPERIOD		0x41A
+#define ADE9000_REG_RUN			0x480
+#define ADE9000_REG_CONFIG1		0x481
+#define ADE9000_REG_ACCMODE		0x492
+#define ADE9000_REG_CONFIG3		0x493
+#define ADE9000_REG_ZXTOUT		0x498
+#define ADE9000_REG_ZX_LP_SEL		0x49A
+#define ADE9000_REG_WFB_CFG		0x4A0
+#define ADE9000_REG_WFB_PG_IRQEN	0x4A1
+#define ADE9000_REG_WFB_TRG_CFG		0x4A2
+#define ADE9000_REG_WFB_TRG_STAT	0x4A3
+#define ADE9000_REG_CONFIG2		0x4AF
+#define ADE9000_REG_EP_CFG		0x4B0
+#define ADE9000_REG_EGY_TIME		0x4B2
+#define ADE9000_REG_PGA_GAIN		0x4B9
+#define ADE9000_REG_VERSION		0x4FE
+#define ADE9000_REG_WF_BUFF		0x800
+#define ADE9000_REG_WF_HALF_BUFF	0xC00
+
+#define ADE9000_REG_ADDR_MASK		GENMASK(15, 4)
+#define ADE9000_REG_READ_BIT_MASK	BIT(3)
+
+#define ADE9000_WF_CAP_EN_MASK		BIT(4)
+#define ADE9000_WF_CAP_SEL_MASK		BIT(5)
+#define ADE9000_WF_MODE_MASK		GENMASK(7, 6)
+#define ADE9000_WF_SRC_MASK		GENMASK(9, 8)
+#define ADE9000_WF_IN_EN_MASK		BIT(12)
+
+/* External reference selection bit in CONFIG1 */
+#define ADE9000_EXT_REF_MASK		BIT(15)
+
+/*
+ * Configuration registers
+ */
+#define ADE9000_PGA_GAIN		0x0000
+
+/* Default configuration */
+
+#define ADE9000_CONFIG0			0x00000000
+
+/* CF3/ZX pin outputs Zero crossing, CF4 = DREADY */
+#define ADE9000_CONFIG1			0x000E
+
+/* Default High pass corner frequency of 1.25Hz */
+#define ADE9000_CONFIG2			0x0A00
+
+/* Peak and overcurrent detection disabled */
+#define ADE9000_CONFIG3			0x0000
+
+/*
+ * 50Hz operation, 3P4W Wye configuration, signed accumulation
+ * 3P4W Wye = 3-Phase 4-Wire star configuration (3 phases + neutral wire)
+ * Clear bit 8 i.e. ACCMODE=0x00xx for 50Hz operation
+ * ACCMODE=0x0x9x for 3Wire delta when phase B is used as reference
+ * 3Wire delta = 3-Phase 3-Wire triangle configuration (3 phases, no neutral)
+ */
+#define ADE9000_ACCMODE			0x0000
+#define ADE9000_ACCMODE_60HZ		0x0100
+
+/*Line period and zero crossing obtained from VA */
+#define ADE9000_ZX_LP_SEL		0x0000
+
+/* Interrupt mask values for initialization */
+#define ADE9000_MASK0_ALL_INT_DIS	0
+#define ADE9000_MASK1_ALL_INT_DIS	0x00000000
+
+/* Events disabled */
+#define ADE9000_EVENT_DISABLE		0x00000000
+
+/*
+ * Assuming Vnom=1/2 of full scale.
+ * Refer to Technical reference manual for detailed calculations.
+ */
+#define ADE9000_VLEVEL			0x0022EA28
+
+/* Set DICOEFF= 0xFFFFE000 when integrator is enabled */
+#define ADE9000_DICOEFF			0x00000000
+
+/* DSP ON */
+#define ADE9000_RUN_ON			0xFFFFFFFF
+
+/*
+ * Energy Accumulation Settings
+ * Enable energy accumulation, accumulate samples at 8ksps
+ * latch energy accumulation after EGYRDY
+ * If accumulation is changed to half line cycle mode, change EGY_TIME
+ */
+#define ADE9000_EP_CFG			0x0011
+
+/* Accumulate 4000 samples */
+#define ADE9000_EGY_TIME		7999
+
+/*
+ * Constant Definitions
+ * ADE9000 FDSP: 8000sps, ADE9000 FDSP: 4000sps
+ */
+#define ADE9000_FDSP			4000
+#define ADE9000_DEFAULT_CLK_FREQ_HZ	24576000
+#define ADE9000_WFB_CFG			0x03E9
+#define ADE9000_WFB_PAGE_SIZE		128
+#define ADE9000_WFB_NR_OF_PAGES		16
+#define ADE9000_WFB_MAX_CHANNELS	8
+#define ADE9000_WFB_BYTES_IN_SAMPLE	4
+#define ADE9000_WFB_SAMPLES_IN_PAGE	\
+	(ADE9000_WFB_PAGE_SIZE / ADE9000_WFB_MAX_CHANNELS)
+#define ADE9000_WFB_MAX_SAMPLES_CHAN	\
+	(ADE9000_WFB_SAMPLES_IN_PAGE * ADE9000_WFB_NR_OF_PAGES)
+#define ADE9000_WFB_FULL_BUFF_NR_SAMPLES \
+	(ADE9000_WFB_PAGE_SIZE * ADE9000_WFB_NR_OF_PAGES)
+#define ADE9000_WFB_FULL_BUFF_SIZE	\
+	(ADE9000_WFB_FULL_BUFF_NR_SAMPLES * ADE9000_WFB_BYTES_IN_SAMPLE)
+
+#define ADE9000_SWRST_BIT		BIT(0)
+
+/* Status and Mask register bits*/
+#define ADE9000_ST0_WFB_TRIG_BIT	BIT(16)
+#define ADE9000_ST0_PAGE_FULL_BIT	BIT(17)
+#define ADE9000_ST0_EGYRDY		BIT(0)
+
+#define ADE9000_ST1_ZXTOVA_BIT		BIT(6)
+#define ADE9000_ST1_ZXTOVB_BIT		BIT(7)
+#define ADE9000_ST1_ZXTOVC_BIT		BIT(8)
+#define ADE9000_ST1_ZXVA_BIT		BIT(9)
+#define ADE9000_ST1_ZXVB_BIT		BIT(10)
+#define ADE9000_ST1_ZXVC_BIT		BIT(11)
+#define ADE9000_ST1_ZXIA_BIT		BIT(13)
+#define ADE9000_ST1_ZXIB_BIT		BIT(14)
+#define ADE9000_ST1_ZXIC_BIT		BIT(15)
+#define ADE9000_ST1_RSTDONE_BIT		BIT(16)
+#define ADE9000_ST1_SEQERR_BIT		BIT(18)
+#define ADE9000_ST1_SWELLA_BIT		BIT(20)
+#define ADE9000_ST1_SWELLB_BIT		BIT(21)
+#define ADE9000_ST1_SWELLC_BIT		BIT(22)
+#define ADE9000_ST1_DIPA_BIT		BIT(23)
+#define ADE9000_ST1_DIPB_BIT		BIT(24)
+#define ADE9000_ST1_DIPC_BIT		BIT(25)
+#define ADE9000_ST1_ERROR0_BIT		BIT(28)
+#define ADE9000_ST1_ERROR1_BIT		BIT(29)
+#define ADE9000_ST1_ERROR2_BIT		BIT(30)
+#define ADE9000_ST1_ERROR3_BIT		BIT(31)
+#define ADE9000_ST_ERROR \
+	(ADE9000_ST1_ERROR0 | ADE9000_ST1_ERROR1 | \
+	 ADE9000_ST1_ERROR2 | ADE9000_ST1_ERROR3)
+#define ADE9000_ST1_CROSSING_FIRST	6
+#define ADE9000_ST1_CROSSING_DEPTH	25
+
+#define ADE9000_WFB_TRG_DIP_BIT		BIT(0)
+#define ADE9000_WFB_TRG_SWELL_BIT	BIT(1)
+#define ADE9000_WFB_TRG_ZXIA_BIT	BIT(3)
+#define ADE9000_WFB_TRG_ZXIB_BIT	BIT(4)
+#define ADE9000_WFB_TRG_ZXIC_BIT	BIT(5)
+#define ADE9000_WFB_TRG_ZXVA_BIT	BIT(6)
+#define ADE9000_WFB_TRG_ZXVB_BIT	BIT(7)
+#define ADE9000_WFB_TRG_ZXVC_BIT	BIT(8)
+
+/* Stop when waveform buffer is full */
+#define ADE9000_WFB_FULL_MODE		0x0
+/* Continuous fill—stop only on enabled trigger events */
+#define ADE9000_WFB_EN_TRIG_MODE	0x1
+/* Continuous filling—center capture around enabled trigger events */
+#define ADE9000_WFB_C_EN_TRIG_MODE	0x2
+/* Continuous fill—used as streaming mode for continuous data output */
+#define ADE9000_WFB_STREAMING_MODE	0x3
+
+#define ADE9000_LAST_PAGE_BIT		BIT(15)
+#define ADE9000_MIDDLE_PAGE_BIT		BIT(7)
+
+/*
+ * Full scale Codes referred from Datasheet. Respective digital codes are
+ * produced when ADC inputs are at full scale.
+ */
+#define ADE9000_RMS_FULL_SCALE_CODES	52866837
+#define ADE9000_WATT_FULL_SCALE_CODES	20694066
+#define ADE9000_PCF_FULL_SCALE_CODES	74770000
+
+/* Phase and channel definitions */
+#define ADE9000_PHASE_A_NR		0
+#define ADE9000_PHASE_B_NR		1
+#define ADE9000_PHASE_C_NR		2
+
+#define ADE9000_SCAN_POS_IA		BIT(0)
+#define ADE9000_SCAN_POS_VA		BIT(1)
+#define ADE9000_SCAN_POS_IB		BIT(2)
+#define ADE9000_SCAN_POS_VB		BIT(3)
+#define ADE9000_SCAN_POS_IC		BIT(4)
+#define ADE9000_SCAN_POS_VC		BIT(5)
+
+/* Waveform buffer configuration values */
+enum ade9000_wfb_cfg {
+	ADE9000_WFB_CFG_ALL_CHAN = 0x0,
+	ADE9000_WFB_CFG_IA_VA = 0x1,
+	ADE9000_WFB_CFG_IB_VB = 0x2,
+	ADE9000_WFB_CFG_IC_VC = 0x3,
+	ADE9000_WFB_CFG_IA = 0x8,
+	ADE9000_WFB_CFG_VA = 0x9,
+	ADE9000_WFB_CFG_IB = 0xA,
+	ADE9000_WFB_CFG_VB = 0xB,
+	ADE9000_WFB_CFG_IC = 0xC,
+	ADE9000_WFB_CFG_VC = 0xD,
+};
+
+#define ADE9000_PHASE_B_POS_BIT		BIT(5)
+#define ADE9000_PHASE_C_POS_BIT		BIT(6)
+
+#define ADE9000_MAX_PHASE_NR		3
+#define AD9000_CHANNELS_PER_PHASE	10
+
+/*
+ * Calculate register address for multi-phase device.
+ * Phase A (chan 0): base address + 0x00
+ * Phase B (chan 1): base address + 0x20
+ * Phase C (chan 2): base address + 0x40
+ */
+#define ADE9000_ADDR_ADJUST(addr, chan)					\
+	(((chan) == 0 ? 0 : (chan) == 1 ? 2 : 4) << 4 | (addr))
+
+struct ade9000_state {
+	struct completion reset_completion;
+	struct mutex lock; /* Protects SPI transactions */
+	u8 wf_src;
+	u32 wfb_trg;
+	u8 wfb_nr_activ_chan;
+	u32 wfb_nr_samples;
+	struct spi_device *spi;
+	struct clk *clkin;
+	struct spi_transfer xfer[2];
+	struct spi_message spi_msg;
+	struct regmap *regmap;
+	union{
+		u8 byte[ADE9000_WFB_FULL_BUFF_SIZE];
+		__be32 word[ADE9000_WFB_FULL_BUFF_NR_SAMPLES];
+	} rx_buff __aligned(IIO_DMA_MINALIGN);
+	u8 tx_buff[2] __aligned(IIO_DMA_MINALIGN);
+	unsigned int bulk_read_buf[2];
+};
+
+struct ade9000_irq1_event {
+	u32 bit_mask;
+	enum iio_chan_type chan_type;
+	u32 channel;
+	enum iio_event_type event_type;
+	enum iio_event_direction event_dir;
+};
+
+static const struct ade9000_irq1_event ade9000_irq1_events[] = {
+	{ ADE9000_ST1_ZXVA_BIT, IIO_VOLTAGE, ADE9000_PHASE_A_NR, IIO_EV_TYPE_THRESH, IIO_EV_DIR_EITHER },
+	{ ADE9000_ST1_ZXIA_BIT, IIO_CURRENT, ADE9000_PHASE_A_NR, IIO_EV_TYPE_THRESH, IIO_EV_DIR_EITHER },
+	{ ADE9000_ST1_ZXVB_BIT, IIO_VOLTAGE, ADE9000_PHASE_B_NR, IIO_EV_TYPE_THRESH, IIO_EV_DIR_EITHER },
+	{ ADE9000_ST1_ZXIB_BIT, IIO_CURRENT, ADE9000_PHASE_B_NR, IIO_EV_TYPE_THRESH, IIO_EV_DIR_EITHER },
+	{ ADE9000_ST1_ZXVC_BIT, IIO_VOLTAGE, ADE9000_PHASE_C_NR, IIO_EV_TYPE_THRESH, IIO_EV_DIR_EITHER },
+	{ ADE9000_ST1_ZXIC_BIT, IIO_CURRENT, ADE9000_PHASE_C_NR, IIO_EV_TYPE_THRESH, IIO_EV_DIR_EITHER },
+	{ ADE9000_ST1_SWELLA_BIT, IIO_ALTVOLTAGE, ADE9000_PHASE_A_NR, IIO_EV_TYPE_THRESH, IIO_EV_DIR_RISING },
+	{ ADE9000_ST1_SWELLB_BIT, IIO_ALTVOLTAGE, ADE9000_PHASE_B_NR, IIO_EV_TYPE_THRESH, IIO_EV_DIR_RISING },
+	{ ADE9000_ST1_SWELLC_BIT, IIO_ALTVOLTAGE, ADE9000_PHASE_C_NR, IIO_EV_TYPE_THRESH, IIO_EV_DIR_RISING },
+	{ ADE9000_ST1_DIPA_BIT, IIO_ALTVOLTAGE, ADE9000_PHASE_A_NR, IIO_EV_TYPE_THRESH, IIO_EV_DIR_FALLING },
+	{ ADE9000_ST1_DIPB_BIT, IIO_ALTVOLTAGE, ADE9000_PHASE_B_NR, IIO_EV_TYPE_THRESH, IIO_EV_DIR_FALLING },
+	{ ADE9000_ST1_DIPC_BIT, IIO_ALTVOLTAGE, ADE9000_PHASE_C_NR, IIO_EV_TYPE_THRESH, IIO_EV_DIR_FALLING },
+};
+
+/* Voltage events (zero crossing on instantaneous voltage) */
+static const struct iio_event_spec ade9000_voltage_events[] = {
+	{
+		/* Zero crossing detection - datasheet: ZXV interrupts */
+		.type = IIO_EV_TYPE_THRESH,
+		.dir = IIO_EV_DIR_EITHER,
+		.mask_separate = BIT(IIO_EV_INFO_ENABLE),
+	},
+};
+
+/* Current events (zero crossing on instantaneous current) */
+static const struct iio_event_spec ade9000_current_events[] = {
+	{
+		/* Zero crossing detection - datasheet: ZXI interrupts */
+		.type = IIO_EV_TYPE_THRESH,
+		.dir = IIO_EV_DIR_EITHER,
+		.mask_separate = BIT(IIO_EV_INFO_ENABLE),
+	},
+};
+
+/* RMS voltage events (swell/sag detection on RMS values) */
+static const struct iio_event_spec ade9000_rms_voltage_events[] = {
+	{
+		.type = IIO_EV_TYPE_THRESH,
+		.dir = IIO_EV_DIR_RISING, /* RMS swell detection */
+		.mask_separate = BIT(IIO_EV_INFO_ENABLE) | BIT(IIO_EV_INFO_VALUE),
+	},
+	{
+		.type = IIO_EV_TYPE_THRESH,
+		.dir = IIO_EV_DIR_FALLING, /* RMS sag/dip detection */
+		.mask_separate = BIT(IIO_EV_INFO_ENABLE) | BIT(IIO_EV_INFO_VALUE),
+	},
+};
+
+static const char * const ade9000_filter_type_items[] = {
+	"sinc4", "sinc4+lp",
+};
+
+static const int ade9000_filter_type_values[] = {
+	0, 2,
+};
+
+static int ade9000_filter_type_get(struct iio_dev *indio_dev,
+				   const struct iio_chan_spec *chan)
+{
+	struct ade9000_state *st = iio_priv(indio_dev);
+	u32 val;
+	int ret;
+	unsigned int i;
+
+	ret = regmap_read(st->regmap, ADE9000_REG_WFB_CFG, &val);
+	if (ret)
+		return ret;
+
+	val = FIELD_GET(ADE9000_WF_SRC_MASK, val);
+
+	for (i = 0; i < ARRAY_SIZE(ade9000_filter_type_values); i++) {
+		if (ade9000_filter_type_values[i] == val)
+			return i;
+	}
+
+	return -EINVAL;
+}
+
+static int ade9000_filter_type_set(struct iio_dev *indio_dev,
+				   const struct iio_chan_spec *chan,
+				   unsigned int index)
+{
+	struct ade9000_state *st = iio_priv(indio_dev);
+	int ret, val;
+
+	if (index >= ARRAY_SIZE(ade9000_filter_type_values))
+		return -EINVAL;
+
+	val = ade9000_filter_type_values[index];
+
+	/* Update the WFB_CFG register with the new filter type */
+	ret = regmap_update_bits(st->regmap, ADE9000_REG_WFB_CFG,
+				 ADE9000_WF_SRC_MASK,
+				 FIELD_PREP(ADE9000_WF_SRC_MASK, val));
+	if (ret)
+		return ret;
+
+	/* Update cached value */
+	st->wf_src = val;
+
+	return 0;
+}
+
+static const struct iio_enum ade9000_filter_type_enum = {
+	.items = ade9000_filter_type_items,
+	.num_items = ARRAY_SIZE(ade9000_filter_type_items),
+	.get = ade9000_filter_type_get,
+	.set = ade9000_filter_type_set,
+};
+
+static const struct iio_chan_spec_ext_info ade9000_ext_info[] = {
+	IIO_ENUM("filter_type", IIO_SHARED_BY_ALL, &ade9000_filter_type_enum),
+	IIO_ENUM_AVAILABLE("filter_type", IIO_SHARED_BY_ALL, &ade9000_filter_type_enum),
+	{ }
+};
+
+#define ADE9000_CURRENT_CHANNEL(num) {					\
+	.type = IIO_CURRENT,						\
+	.channel = num,							\
+	.address = ADE9000_ADDR_ADJUST(ADE9000_REG_AI_PCF, num),	\
+	.info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |			\
+			      BIT(IIO_CHAN_INFO_SCALE) |		\
+			      BIT(IIO_CHAN_INFO_CALIBSCALE),		\
+	.event_spec = ade9000_current_events,				\
+	.num_event_specs = ARRAY_SIZE(ade9000_current_events),		\
+	.scan_index = num,						\
+	.indexed = 1,							\
+	.scan_type = {							\
+		.sign = 's',						\
+		.realbits = 32,						\
+		.storagebits = 32,					\
+		.endianness = IIO_BE,					\
+	},								\
+}
+
+#define ADE9000_VOLTAGE_CHANNEL(num) {					\
+	.type = IIO_VOLTAGE,						\
+	.channel = num,							\
+	.address = ADE9000_ADDR_ADJUST(ADE9000_REG_AV_PCF, num),	\
+	.info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |			\
+			      BIT(IIO_CHAN_INFO_SCALE) |		\
+			      BIT(IIO_CHAN_INFO_CALIBSCALE) |		\
+			      BIT(IIO_CHAN_INFO_FREQUENCY),		\
+	.event_spec = ade9000_voltage_events,				\
+	.num_event_specs = ARRAY_SIZE(ade9000_voltage_events),		\
+	.scan_index = num + 1,	/* interleave with current channels */	\
+	.indexed = 1,							\
+	.scan_type = {							\
+		.sign = 's',						\
+		.realbits = 32,						\
+		.storagebits = 32,					\
+		.endianness = IIO_BE,					\
+	},								\
+	.ext_info = ade9000_ext_info,					\
+}
+
+#define ADE9000_ALTCURRENT_RMS_CHANNEL(num) {				\
+	.type = IIO_ALTCURRENT,						\
+	.channel = num,							\
+	.address = ADE9000_ADDR_ADJUST(ADE9000_REG_AIRMS, num),		\
+	.channel2 = IIO_MOD_RMS,					\
+	.modified = 1,							\
+	.indexed = 1,							\
+	.info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |			\
+			      BIT(IIO_CHAN_INFO_SCALE) |		\
+			      BIT(IIO_CHAN_INFO_CALIBBIAS),		\
+	.scan_index = -1						\
+}
+
+#define ADE9000_ALTVOLTAGE_RMS_CHANNEL(num) {				\
+	.type = IIO_ALTVOLTAGE,						\
+	.channel = num,							\
+	.address = ADE9000_ADDR_ADJUST(ADE9000_REG_AVRMS, num),		\
+	.channel2 = IIO_MOD_RMS,					\
+	.modified = 1,							\
+	.indexed = 1,							\
+	.info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |			\
+			      BIT(IIO_CHAN_INFO_SCALE) |		\
+			      BIT(IIO_CHAN_INFO_CALIBBIAS),		\
+	.event_spec = ade9000_rms_voltage_events,			\
+	.num_event_specs = ARRAY_SIZE(ade9000_rms_voltage_events),	\
+	.scan_index = -1						\
+}
+
+#define ADE9000_POWER_ACTIVE_CHANNEL(num) {				\
+	.type = IIO_POWER,						\
+	.channel = num,							\
+	.address = ADE9000_ADDR_ADJUST(ADE9000_REG_AWATT, num),		\
+	.channel2 = IIO_MOD_ACTIVE,					\
+	.modified = 1,							\
+	.indexed = 1,							\
+	.info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |			\
+			      BIT(IIO_CHAN_INFO_SCALE) |		\
+			      BIT(IIO_CHAN_INFO_CALIBBIAS) |		\
+			      BIT(IIO_CHAN_INFO_CALIBSCALE),		\
+	.scan_index = -1						\
+}
+
+#define ADE9000_POWER_REACTIVE_CHANNEL(num) {				\
+	.type = IIO_POWER,						\
+	.channel = num,							\
+	.address = ADE9000_ADDR_ADJUST(ADE9000_REG_AVAR, num),		\
+	.channel2 = IIO_MOD_REACTIVE,					\
+	.modified = 1,							\
+	.indexed = 1,							\
+	.info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |			\
+			      BIT(IIO_CHAN_INFO_SCALE) |		\
+			      BIT(IIO_CHAN_INFO_CALIBBIAS),		\
+	.scan_index = -1						\
+}
+
+#define ADE9000_POWER_APPARENT_CHANNEL(num) {				\
+	.type = IIO_POWER,						\
+	.channel = num,							\
+	.address = ADE9000_ADDR_ADJUST(ADE9000_REG_AVA, num),		\
+	.channel2 = IIO_MOD_APPARENT,					\
+	.modified = 1,							\
+	.indexed = 1,							\
+	.info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |			\
+			      BIT(IIO_CHAN_INFO_SCALE),			\
+	.scan_index = -1						\
+}
+
+ #define ADE9000_ENERGY_ACTIVE_CHANNEL(num, addr) {			\
+	.type = IIO_ENERGY,						\
+	.channel = num,							\
+	.address = addr,						\
+	.channel2 = IIO_MOD_ACTIVE,					\
+	.modified = 1,							\
+	.indexed = 1,							\
+	.info_mask_separate = BIT(IIO_CHAN_INFO_RAW),			\
+	.scan_index = -1						\
+}
+
+#define ADE9000_ENERGY_APPARENT_CHANNEL(num, addr) {			\
+	.type = IIO_ENERGY,						\
+	.channel = num,							\
+	.address = addr,						\
+	.channel2 = IIO_MOD_APPARENT,					\
+	.modified = 1,							\
+	.indexed = 1,							\
+	.info_mask_separate = BIT(IIO_CHAN_INFO_RAW),			\
+	.scan_index = -1						\
+}
+
+#define ADE9000_ENERGY_REACTIVE_CHANNEL(num, addr) {			\
+	.type = IIO_ENERGY,						\
+	.channel = num,							\
+	.address = addr,						\
+	.channel2 = IIO_MOD_REACTIVE,					\
+	.modified = 1,							\
+	.indexed = 1,							\
+	.info_mask_separate = BIT(IIO_CHAN_INFO_RAW),			\
+	.scan_index = -1						\
+}
+
+#define ADE9000_POWER_FACTOR_CHANNEL(num) {				\
+	.type = IIO_POWER,						\
+	.channel = num,							\
+	.address = ADE9000_ADDR_ADJUST(ADE9000_REG_APF, num),		\
+	.indexed = 1,							\
+	.info_mask_separate = BIT(IIO_CHAN_INFO_POWERFACTOR),		\
+	.scan_index = -1						\
+}
+
+static const struct iio_chan_spec ade9000_channels[] = {
+	/* Phase A channels */
+	ADE9000_CURRENT_CHANNEL(ADE9000_PHASE_A_NR),
+	ADE9000_VOLTAGE_CHANNEL(ADE9000_PHASE_A_NR),
+	ADE9000_ALTCURRENT_RMS_CHANNEL(ADE9000_PHASE_A_NR),
+	ADE9000_ALTVOLTAGE_RMS_CHANNEL(ADE9000_PHASE_A_NR),
+	ADE9000_POWER_ACTIVE_CHANNEL(ADE9000_PHASE_A_NR),
+	ADE9000_POWER_REACTIVE_CHANNEL(ADE9000_PHASE_A_NR),
+	ADE9000_POWER_APPARENT_CHANNEL(ADE9000_PHASE_A_NR),
+	ADE9000_ENERGY_ACTIVE_CHANNEL(ADE9000_PHASE_A_NR, ADE9000_REG_AWATTHR_LO),
+	ADE9000_ENERGY_APPARENT_CHANNEL(ADE9000_PHASE_A_NR, ADE9000_REG_AVAHR_LO),
+	ADE9000_ENERGY_REACTIVE_CHANNEL(ADE9000_PHASE_A_NR, ADE9000_REG_AFVARHR_LO),
+	ADE9000_POWER_FACTOR_CHANNEL(ADE9000_PHASE_A_NR),
+	/* Phase B channels */
+	ADE9000_CURRENT_CHANNEL(ADE9000_PHASE_B_NR),
+	ADE9000_VOLTAGE_CHANNEL(ADE9000_PHASE_B_NR),
+	ADE9000_ALTCURRENT_RMS_CHANNEL(ADE9000_PHASE_B_NR),
+	ADE9000_ALTVOLTAGE_RMS_CHANNEL(ADE9000_PHASE_B_NR),
+	ADE9000_POWER_ACTIVE_CHANNEL(ADE9000_PHASE_B_NR),
+	ADE9000_POWER_REACTIVE_CHANNEL(ADE9000_PHASE_B_NR),
+	ADE9000_POWER_APPARENT_CHANNEL(ADE9000_PHASE_B_NR),
+	ADE9000_ENERGY_ACTIVE_CHANNEL(ADE9000_PHASE_B_NR, ADE9000_REG_BWATTHR_LO),
+	ADE9000_ENERGY_APPARENT_CHANNEL(ADE9000_PHASE_B_NR, ADE9000_REG_BVAHR_LO),
+	ADE9000_ENERGY_REACTIVE_CHANNEL(ADE9000_PHASE_B_NR, ADE9000_REG_BFVARHR_LO),
+	ADE9000_POWER_FACTOR_CHANNEL(ADE9000_PHASE_B_NR),
+	/* Phase C channels */
+	ADE9000_CURRENT_CHANNEL(ADE9000_PHASE_C_NR),
+	ADE9000_VOLTAGE_CHANNEL(ADE9000_PHASE_C_NR),
+	ADE9000_ALTCURRENT_RMS_CHANNEL(ADE9000_PHASE_C_NR),
+	ADE9000_ALTVOLTAGE_RMS_CHANNEL(ADE9000_PHASE_C_NR),
+	ADE9000_POWER_ACTIVE_CHANNEL(ADE9000_PHASE_C_NR),
+	ADE9000_POWER_REACTIVE_CHANNEL(ADE9000_PHASE_C_NR),
+	ADE9000_POWER_APPARENT_CHANNEL(ADE9000_PHASE_C_NR),
+	ADE9000_ENERGY_ACTIVE_CHANNEL(ADE9000_PHASE_C_NR, ADE9000_REG_CWATTHR_LO),
+	ADE9000_ENERGY_APPARENT_CHANNEL(ADE9000_PHASE_C_NR, ADE9000_REG_CVAHR_LO),
+	ADE9000_ENERGY_REACTIVE_CHANNEL(ADE9000_PHASE_C_NR, ADE9000_REG_CFVARHR_LO),
+	ADE9000_POWER_FACTOR_CHANNEL(ADE9000_PHASE_C_NR),
+};
+
+static const struct reg_sequence ade9000_initialization_sequence[] = {
+	{ ADE9000_REG_PGA_GAIN, ADE9000_PGA_GAIN },
+	{ ADE9000_REG_CONFIG0, ADE9000_CONFIG0 },
+	{ ADE9000_REG_CONFIG1, ADE9000_CONFIG1 },
+	{ ADE9000_REG_CONFIG2, ADE9000_CONFIG2 },
+	{ ADE9000_REG_CONFIG3, ADE9000_CONFIG3 },
+	{ ADE9000_REG_ACCMODE, ADE9000_ACCMODE },
+	{ ADE9000_REG_ZX_LP_SEL, ADE9000_ZX_LP_SEL },
+	{ ADE9000_REG_MASK0, ADE9000_MASK0_ALL_INT_DIS },
+	{ ADE9000_REG_MASK1, ADE9000_MASK1_ALL_INT_DIS },
+	{ ADE9000_REG_EVENT_MASK, ADE9000_EVENT_DISABLE },
+	{ ADE9000_REG_WFB_CFG, ADE9000_WFB_CFG },
+	{ ADE9000_REG_VLEVEL, ADE9000_VLEVEL },
+	{ ADE9000_REG_DICOEFF, ADE9000_DICOEFF },
+	{ ADE9000_REG_EGY_TIME, ADE9000_EGY_TIME },
+	{ ADE9000_REG_EP_CFG, ADE9000_EP_CFG },
+	/* Clear all pending status bits by writing 1s */
+	{ ADE9000_REG_STATUS0, GENMASK(31, 0) },
+	{ ADE9000_REG_STATUS1, GENMASK(31, 0) },
+	{ ADE9000_REG_RUN, ADE9000_RUN_ON }
+};
+
+static int ade9000_spi_write_reg(void *context, unsigned int reg,
+				 unsigned int val)
+{
+	struct ade9000_state *st = context;
+	u8 tx_buf[6];
+	u16 addr;
+	int ret, len;
+
+	guard(mutex)(&st->lock);
+
+	addr = FIELD_PREP(ADE9000_REG_ADDR_MASK, reg);
+	put_unaligned_be16(addr, tx_buf);
+
+	if (reg > ADE9000_REG_RUN && reg < ADE9000_REG_VERSION) {
+		put_unaligned_be16(val, &tx_buf[2]);
+		len = 4;
+	} else {
+		put_unaligned_be32(val, &tx_buf[2]);
+		len = 6;
+	}
+
+	ret = spi_write_then_read(st->spi, tx_buf, len, NULL, 0);
+	if (ret)
+		dev_err(&st->spi->dev, "problem when writing register 0x%x\n", reg);
+
+	return ret;
+}
+
+static int ade9000_spi_read_reg(void *context, unsigned int reg,
+				unsigned int *val)
+{
+	struct ade9000_state *st = context;
+	u8 tx_buf[2];
+	u8 rx_buf[4];
+	u16 addr;
+	int ret, rx_len;
+
+	guard(mutex)(&st->lock);
+
+	addr = FIELD_PREP(ADE9000_REG_ADDR_MASK, reg) |
+	       ADE9000_REG_READ_BIT_MASK;
+
+	put_unaligned_be16(addr, tx_buf);
+
+	/* Skip CRC bytes - only read actual data */
+	if (reg > ADE9000_REG_RUN && reg < ADE9000_REG_VERSION)
+		rx_len = 2;
+	else
+		rx_len = 4;
+
+	ret = spi_write_then_read(st->spi, tx_buf, 2, rx_buf, rx_len);
+	if (ret) {
+		dev_err(&st->spi->dev, "error reading register 0x%x\n", reg);
+		return ret;
+	}
+
+	if (reg > ADE9000_REG_RUN && reg < ADE9000_REG_VERSION)
+		*val = get_unaligned_be16(rx_buf);
+	else
+		*val = get_unaligned_be32(rx_buf);
+
+	return 0;
+}
+
+static bool ade9000_is_volatile_reg(struct device *dev, unsigned int reg)
+{
+	switch (reg) {
+	/* Interrupt/error status registers - volatile */
+	case ADE9000_REG_STATUS0:
+	case ADE9000_REG_STATUS1:
+		return true;
+	default:
+		/* All other registers are non-volatile */
+		return false;
+	}
+}
+
+static void ade9000_configure_scan(struct iio_dev *indio_dev, u32 wfb_addr)
+{
+	struct ade9000_state *st = iio_priv(indio_dev);
+	u16 addr;
+
+	addr = FIELD_PREP(ADE9000_REG_ADDR_MASK, wfb_addr) |
+	       ADE9000_REG_READ_BIT_MASK;
+
+	put_unaligned_be16(addr, st->tx_buff);
+
+	st->xfer[0].tx_buf = &st->tx_buff[0];
+	st->xfer[0].len = 2;
+
+	st->xfer[1].rx_buf = st->rx_buff.byte;
+
+	/* Always use streaming mode */
+	st->xfer[1].len = (st->wfb_nr_samples / 2) * 4;
+
+	spi_message_init_with_transfers(&st->spi_msg, st->xfer, ARRAY_SIZE(st->xfer));
+}
+
+static int ade9000_iio_push_streaming(struct iio_dev *indio_dev)
+{
+	struct ade9000_state *st = iio_priv(indio_dev);
+	struct device *dev = &st->spi->dev;
+	u32 current_page, i;
+	int ret;
+
+	guard(mutex)(&st->lock);
+
+	ret = spi_sync(st->spi, &st->spi_msg);
+	if (ret) {
+		dev_err_ratelimited(dev, "SPI fail in trigger handler\n");
+		return ret;
+	}
+
+	/* In streaming mode, only half the buffer is filled per interrupt */
+	for (i = 0; i < st->wfb_nr_samples / 2; i += st->wfb_nr_activ_chan)
+		iio_push_to_buffers(indio_dev, &st->rx_buff.word[i]);
+
+	ret = regmap_read(st->regmap, ADE9000_REG_WFB_PG_IRQEN, &current_page);
+	if (ret) {
+		dev_err_ratelimited(dev, "IRQ0 WFB read fail\n");
+		return ret;
+	}
+
+	if (current_page & ADE9000_MIDDLE_PAGE_BIT) {
+		ret = regmap_write(st->regmap, ADE9000_REG_WFB_PG_IRQEN,
+				   ADE9000_LAST_PAGE_BIT);
+		if (ret) {
+			dev_err_ratelimited(dev, "IRQ0 WFB write fail\n");
+			return ret;
+		}
+
+		ade9000_configure_scan(indio_dev,
+				       ADE9000_REG_WF_HALF_BUFF);
+	} else {
+		ret = regmap_write(st->regmap, ADE9000_REG_WFB_PG_IRQEN,
+				   ADE9000_MIDDLE_PAGE_BIT);
+		if (ret) {
+			dev_err_ratelimited(dev, "IRQ0 WFB write fail");
+			return IRQ_HANDLED;
+		}
+
+		ade9000_configure_scan(indio_dev, ADE9000_REG_WF_BUFF);
+	}
+
+	return 0;
+}
+
+static int ade9000_iio_push_buffer(struct iio_dev *indio_dev)
+{
+	struct ade9000_state *st = iio_priv(indio_dev);
+	int ret;
+	u32 i;
+
+	guard(mutex)(&st->lock);
+
+	ret = spi_sync(st->spi, &st->spi_msg);
+	if (ret) {
+		dev_err_ratelimited(&st->spi->dev,
+				    "SPI fail in trigger handler\n");
+		return ret;
+	}
+
+	for (i = 0; i < st->wfb_nr_samples; i += st->wfb_nr_activ_chan)
+		iio_push_to_buffers(indio_dev, &st->rx_buff.word[i]);
+
+	return 0;
+}
+
+static irqreturn_t ade9000_irq0_thread(int irq, void *data)
+{
+	struct iio_dev *indio_dev = data;
+	struct ade9000_state *st = iio_priv(indio_dev);
+	struct device *dev = &st->spi->dev;
+	u32 handled_irq = 0;
+	u32 interrupts, status;
+	int ret;
+
+	ret = regmap_read(st->regmap, ADE9000_REG_STATUS0, &status);
+	if (ret) {
+		dev_err_ratelimited(dev, "IRQ0 read status fail\n");
+		return IRQ_HANDLED;
+	}
+
+	ret = regmap_read(st->regmap, ADE9000_REG_MASK0, &interrupts);
+	if (ret) {
+		dev_err_ratelimited(dev, "IRQ0 read mask fail\n");
+		return IRQ_HANDLED;
+	}
+
+	if ((status & ADE9000_ST0_PAGE_FULL_BIT) &&
+	    (interrupts & ADE9000_ST0_PAGE_FULL_BIT)) {
+		/* Always use streaming mode */
+		ret = ade9000_iio_push_streaming(indio_dev);
+		if (ret) {
+			dev_err_ratelimited(dev, "IRQ0 IIO push fail\n");
+			return IRQ_HANDLED;
+		}
+
+		handled_irq |= ADE9000_ST0_PAGE_FULL_BIT;
+	}
+
+	if ((status & ADE9000_ST0_WFB_TRIG_BIT) &&
+	    (interrupts & ADE9000_ST0_WFB_TRIG_BIT)) {
+		ret = regmap_update_bits(st->regmap, ADE9000_REG_WFB_CFG,
+					 ADE9000_WF_CAP_EN_MASK, 0);
+		if (ret) {
+			dev_err_ratelimited(dev, "IRQ0 WFB fail\n");
+			return IRQ_HANDLED;
+		}
+
+		if (iio_buffer_enabled(indio_dev)) {
+			ret = ade9000_iio_push_buffer(indio_dev);
+			if (ret) {
+				dev_err_ratelimited(dev,
+						    "IRQ0 IIO push fail @ WFB TRIG\n");
+				return IRQ_HANDLED;
+			}
+		}
+
+		handled_irq |= ADE9000_ST0_WFB_TRIG_BIT;
+	}
+
+	ret = regmap_write(st->regmap, ADE9000_REG_STATUS0, handled_irq);
+	if (ret)
+		dev_err_ratelimited(dev, "IRQ0 write status fail\n");
+
+	return IRQ_HANDLED;
+}
+
+static irqreturn_t ade9000_irq1_thread(int irq, void *data)
+{
+	struct iio_dev *indio_dev = data;
+	struct ade9000_state *st = iio_priv(indio_dev);
+	unsigned int bit = ADE9000_ST1_CROSSING_FIRST;
+	s64 timestamp = iio_get_time_ns(indio_dev);
+	u32 handled_irq = 0;
+	u32 interrupts, result, status, tmp;
+	DECLARE_BITMAP(interrupt_bits, ADE9000_ST1_CROSSING_DEPTH);
+	const struct ade9000_irq1_event *event;
+	int ret, i;
+
+	if (!completion_done(&st->reset_completion)) {
+		ret = regmap_read(st->regmap, ADE9000_REG_STATUS1, &result);
+		if (ret) {
+			dev_err_ratelimited(&st->spi->dev, "IRQ1 read status fail\n");
+			return IRQ_HANDLED;
+		}
+
+		if (result & ADE9000_ST1_RSTDONE_BIT) {
+			complete(&st->reset_completion);
+			/* Clear the reset done status bit */
+			ret = regmap_write(st->regmap, ADE9000_REG_STATUS1, ADE9000_ST1_RSTDONE_BIT);
+			if (ret)
+				dev_err_ratelimited(&st->spi->dev,
+						    "IRQ1 clear reset status fail\n");
+		} else {
+			dev_err_ratelimited(&st->spi->dev,
+					    "Error testing reset done\n");
+		}
+
+		return IRQ_HANDLED;
+	}
+
+	ret = regmap_read(st->regmap, ADE9000_REG_STATUS1, &status);
+	if (ret) {
+		dev_err_ratelimited(&st->spi->dev, "IRQ1 read status fail\n");
+		return IRQ_HANDLED;
+	}
+
+	ret = regmap_read(st->regmap, ADE9000_REG_MASK1, &interrupts);
+	if (ret) {
+		dev_err_ratelimited(&st->spi->dev, "IRQ1 read mask fail\n");
+		return IRQ_HANDLED;
+	}
+
+	bitmap_from_arr32(interrupt_bits, &interrupts, ADE9000_ST1_CROSSING_DEPTH);
+	for_each_set_bit_from(bit, interrupt_bits,
+			      ADE9000_ST1_CROSSING_DEPTH) {
+		tmp = status & BIT(bit);
+		if (!tmp)
+			continue;
+
+		event = NULL;
+
+		/* Find corresponding event in lookup table */
+		for (i = 0; i < ARRAY_SIZE(ade9000_irq1_events); i++) {
+			if (ade9000_irq1_events[i].bit_mask == tmp) {
+				event = &ade9000_irq1_events[i];
+				break;
+			}
+		}
+
+		if (event) {
+			iio_push_event(indio_dev,
+				       IIO_UNMOD_EVENT_CODE(event->chan_type,
+							    event->channel,
+							    event->event_type,
+							    event->event_dir),
+							    timestamp);
+		}
+		handled_irq |= tmp;
+	}
+
+	ret = regmap_write(st->regmap, ADE9000_REG_STATUS1, handled_irq);
+	if (ret)
+		dev_err_ratelimited(&st->spi->dev, "IRQ1 write status fail\n");
+
+	return IRQ_HANDLED;
+}
+
+static irqreturn_t ade9000_dready_thread(int irq, void *data)
+{
+	struct iio_dev *indio_dev = data;
+
+	/* Handle data ready interrupt from C4/EVENT/DREADY pin */
+	if (!iio_device_claim_buffer_mode(indio_dev)) {
+		ade9000_iio_push_buffer(indio_dev);
+		iio_device_release_buffer_mode(indio_dev);
+	}
+
+	return IRQ_HANDLED;
+}
+
+static int ade9000_read_raw(struct iio_dev *indio_dev,
+			    struct iio_chan_spec const *chan,
+			    int *val,
+			    int *val2,
+			    long mask)
+{
+	struct ade9000_state *st = iio_priv(indio_dev);
+	unsigned int measured;
+	int ret;
+
+	switch (mask) {
+	case IIO_CHAN_INFO_FREQUENCY:
+		if (chan->type == IIO_VOLTAGE) {
+			int period_reg;
+			int period;
+
+			switch (chan->channel) {
+			case ADE9000_PHASE_A_NR:
+				period_reg = ADE9000_REG_APERIOD;
+				break;
+			case ADE9000_PHASE_B_NR:
+				period_reg = ADE9000_REG_BPERIOD;
+				break;
+			case ADE9000_PHASE_C_NR:
+				period_reg = ADE9000_REG_CPERIOD;
+				break;
+			default:
+				return -EINVAL;
+			}
+			ret = regmap_read(st->regmap, period_reg, &period);
+			if (ret)
+				return ret;
+			/*
+			 * Frequency = (4MHz * 65536) / (PERIOD + 1)
+			 * 4MHz = ADC sample rate, 65536 = 2^16 period register scaling
+			 * See ADE9000 datasheet section on period measurement
+			 */
+			*val = 4000 * 65536;
+			*val2 = period + 1;
+			return IIO_VAL_FRACTIONAL;
+		}
+
+		return -EINVAL;
+	case IIO_CHAN_INFO_RAW:
+		if (chan->type == IIO_ENERGY) {
+			u16 lo_reg = chan->address;
+
+			ret = regmap_bulk_read(st->regmap, lo_reg,
+					       st->bulk_read_buf, 2);
+			if (ret)
+				return ret;
+
+			*val = st->bulk_read_buf[0];  /* Lower 32 bits */
+			*val2 = st->bulk_read_buf[1]; /* Upper 32 bits */
+			return IIO_VAL_INT_64;
+		}
+
+		if (!iio_device_claim_direct(indio_dev))
+			return -EBUSY;
+
+		ret = regmap_read(st->regmap, chan->address, &measured);
+		iio_device_release_direct(indio_dev);
+		if (ret)
+			return ret;
+
+		*val = measured;
+
+		return IIO_VAL_INT;
+
+	case IIO_CHAN_INFO_POWERFACTOR:
+		if (!iio_device_claim_direct(indio_dev))
+			return -EBUSY;
+
+		ret = regmap_read(st->regmap, chan->address, &measured);
+		iio_device_release_direct(indio_dev);
+		if (ret)
+			return ret;
+
+		*val = measured;
+
+		return IIO_VAL_INT;
+
+	case IIO_CHAN_INFO_SCALE:
+		switch (chan->type) {
+		case IIO_CURRENT:
+		case IIO_VOLTAGE:
+		case IIO_ALTVOLTAGE:
+		case IIO_ALTCURRENT:
+			switch (chan->address) {
+			case ADE9000_REG_AI_PCF:
+			case ADE9000_REG_AV_PCF:
+			case ADE9000_REG_BI_PCF:
+			case ADE9000_REG_BV_PCF:
+			case ADE9000_REG_CI_PCF:
+			case ADE9000_REG_CV_PCF:
+				*val = 1;
+				*val2 = ADE9000_PCF_FULL_SCALE_CODES;
+				return IIO_VAL_FRACTIONAL;
+			case ADE9000_REG_AIRMS:
+			case ADE9000_REG_AVRMS:
+			case ADE9000_REG_BIRMS:
+			case ADE9000_REG_BVRMS:
+			case ADE9000_REG_CIRMS:
+			case ADE9000_REG_CVRMS:
+				*val = 1;
+				*val2 = ADE9000_RMS_FULL_SCALE_CODES;
+				return IIO_VAL_FRACTIONAL;
+			default:
+				return -EINVAL;
+			}
+		case IIO_POWER:
+			*val = 1;
+			*val2 = ADE9000_WATT_FULL_SCALE_CODES;
+			return IIO_VAL_FRACTIONAL;
+		default:
+			break;
+		}
+
+		return -EINVAL;
+	default:
+		return -EINVAL;
+	}
+}
+
+static int ade9000_write_raw(struct iio_dev *indio_dev,
+			     struct iio_chan_spec const *chan,
+			     int val,
+			     int val2,
+			     long mask)
+{
+	struct ade9000_state *st = iio_priv(indio_dev);
+	u32 tmp;
+
+	switch (mask) {
+	case IIO_CHAN_INFO_CALIBBIAS:
+		switch (chan->type) {
+		case IIO_CURRENT:
+			return regmap_write(st->regmap,
+					    ADE9000_ADDR_ADJUST(ADE9000_REG_AIRMSOS,
+								chan->channel), val);
+		case IIO_VOLTAGE:
+		case IIO_ALTVOLTAGE:
+			return regmap_write(st->regmap,
+					    ADE9000_ADDR_ADJUST(ADE9000_REG_AVRMSOS,
+								chan->channel), val);
+		case IIO_POWER:
+			tmp = chan->address;
+			tmp &= ~ADE9000_PHASE_B_POS_BIT;
+			tmp &= ~ADE9000_PHASE_C_POS_BIT;
+
+			switch (tmp) {
+			case ADE9000_REG_AWATTOS:
+				return regmap_write(st->regmap,
+						    ADE9000_ADDR_ADJUST(ADE9000_REG_AWATTOS,
+									chan->channel), val);
+			case ADE9000_REG_AVAR:
+				return regmap_write(st->regmap,
+						    ADE9000_ADDR_ADJUST(ADE9000_REG_AVAROS,
+									chan->channel), val);
+			case ADE9000_REG_AFVAR:
+				return regmap_write(st->regmap,
+						    ADE9000_ADDR_ADJUST(ADE9000_REG_AFVAROS,
+									chan->channel), val);
+			default:
+				return -EINVAL;
+			}
+		default:
+			return -EINVAL;
+		}
+	case IIO_CHAN_INFO_CALIBSCALE:
+		/*
+		 * Calibration gain registers for fine-tuning measurements.
+		 * These are separate from PGA gain and applied in the digital domain.
+		 */
+		switch (chan->type) {
+		case IIO_CURRENT:
+			return regmap_write(st->regmap,
+					    ADE9000_ADDR_ADJUST(ADE9000_REG_AIGAIN,
+								chan->channel), val);
+		case IIO_VOLTAGE:
+			return regmap_write(st->regmap,
+					    ADE9000_ADDR_ADJUST(ADE9000_REG_AVGAIN,
+								chan->channel), val);
+		case IIO_POWER:
+			return regmap_write(st->regmap,
+					    ADE9000_ADDR_ADJUST(ADE9000_REG_APGAIN,
+								chan->channel), val);
+		default:
+			return -EINVAL;
+		}
+	case IIO_CHAN_INFO_SCALE:
+		/* Per-channel scales are read-only */
+		return -EINVAL;
+	default:
+		return -EINVAL;
+	}
+}
+
+static int ade9000_reg_access(struct iio_dev *indio_dev,
+			      unsigned int reg,
+			      unsigned int tx_val,
+			      unsigned int *rx_val)
+{
+	struct ade9000_state *st = iio_priv(indio_dev);
+
+	if (rx_val)
+		return regmap_read(st->regmap, reg, rx_val);
+
+	return regmap_write(st->regmap, reg, tx_val);
+}
+
+static int ade9000_read_event_config(struct iio_dev *indio_dev,
+				     const struct iio_chan_spec *chan,
+				     enum iio_event_type type,
+				     enum iio_event_direction dir)
+{
+	struct ade9000_state *st = iio_priv(indio_dev);
+	u32 interrupts1;
+	int ret;
+
+	/* All events use MASK1 register */
+	ret = regmap_read(st->regmap, ADE9000_REG_MASK1, &interrupts1);
+	if (ret)
+		return ret;
+
+	switch (chan->channel) {
+	case ADE9000_PHASE_A_NR:
+		if (chan->type == IIO_VOLTAGE && dir == IIO_EV_DIR_EITHER)
+			return !!(interrupts1 & ADE9000_ST1_ZXVA_BIT);
+		else if (chan->type == IIO_CURRENT && dir == IIO_EV_DIR_EITHER)
+			return !!(interrupts1 & ADE9000_ST1_ZXIA_BIT);
+		else if (chan->type == IIO_ALTVOLTAGE && dir == IIO_EV_DIR_RISING)
+			return !!(interrupts1 & ADE9000_ST1_SWELLA_BIT);
+		else if (chan->type == IIO_ALTVOLTAGE && dir == IIO_EV_DIR_FALLING)
+			return !!(interrupts1 & ADE9000_ST1_DIPA_BIT);
+		dev_err_ratelimited(&indio_dev->dev,
+				    "Invalid channel type %d or direction %d for phase A\n", chan->type, dir);
+		return -EINVAL;
+	case ADE9000_PHASE_B_NR:
+		if (chan->type == IIO_VOLTAGE && dir == IIO_EV_DIR_EITHER)
+			return !!(interrupts1 & ADE9000_ST1_ZXVB_BIT);
+		else if (chan->type == IIO_CURRENT && dir == IIO_EV_DIR_EITHER)
+			return !!(interrupts1 & ADE9000_ST1_ZXIB_BIT);
+		else if (chan->type == IIO_ALTVOLTAGE && dir == IIO_EV_DIR_RISING)
+			return !!(interrupts1 & ADE9000_ST1_SWELLB_BIT);
+		else if (chan->type == IIO_ALTVOLTAGE && dir == IIO_EV_DIR_FALLING)
+			return !!(interrupts1 & ADE9000_ST1_DIPB_BIT);
+		dev_err_ratelimited(&indio_dev->dev,
+				    "Invalid channel type %d or direction %d for phase B\n", chan->type, dir);
+		return -EINVAL;
+	case ADE9000_PHASE_C_NR:
+		if (chan->type == IIO_VOLTAGE && dir == IIO_EV_DIR_EITHER)
+			return !!(interrupts1 & ADE9000_ST1_ZXVC_BIT);
+		else if (chan->type == IIO_CURRENT && dir == IIO_EV_DIR_EITHER)
+			return !!(interrupts1 & ADE9000_ST1_ZXIC_BIT);
+		else if (chan->type == IIO_ALTVOLTAGE && dir == IIO_EV_DIR_RISING)
+			return !!(interrupts1 & ADE9000_ST1_SWELLC_BIT);
+		else if (chan->type == IIO_ALTVOLTAGE && dir == IIO_EV_DIR_FALLING)
+			return !!(interrupts1 & ADE9000_ST1_DIPC_BIT);
+		dev_err_ratelimited(&indio_dev->dev,
+				    "Invalid channel type %d or direction %d for phase C\n", chan->type, dir);
+		return -EINVAL;
+	default:
+		return -EINVAL;
+	}
+}
+
+static int ade9000_write_event_config(struct iio_dev *indio_dev,
+				      const struct iio_chan_spec *chan,
+				      enum iio_event_type type,
+				      enum iio_event_direction dir,
+				      bool state)
+{
+	struct ade9000_state *st = iio_priv(indio_dev);
+	u32 bit_mask;
+	int ret;
+
+	/* Clear all pending events in STATUS1 register (write 1 to clear) */
+	ret = regmap_write(st->regmap, ADE9000_REG_STATUS1, GENMASK(31, 0));
+	if (ret)
+		return ret;
+
+	/* Determine which interrupt bit to enable/disable */
+	switch (chan->channel) {
+	case ADE9000_PHASE_A_NR:
+		if (chan->type == IIO_VOLTAGE && dir == IIO_EV_DIR_EITHER) {
+			bit_mask = ADE9000_ST1_ZXVA_BIT;
+			if (state)
+				st->wfb_trg |= ADE9000_WFB_TRG_ZXVA_BIT;
+			else
+				st->wfb_trg &= ~ADE9000_WFB_TRG_ZXVA_BIT;
+		} else if (chan->type == IIO_CURRENT && dir == IIO_EV_DIR_EITHER) {
+			bit_mask = ADE9000_ST1_ZXIA_BIT;
+			if (state)
+				st->wfb_trg |= ADE9000_WFB_TRG_ZXIA_BIT;
+			else
+				st->wfb_trg &= ~ADE9000_WFB_TRG_ZXIA_BIT;
+		} else if (chan->type == IIO_ALTVOLTAGE && dir == IIO_EV_DIR_RISING) {
+			bit_mask = ADE9000_ST1_SWELLA_BIT;
+			if (state)
+				st->wfb_trg |= ADE9000_WFB_TRG_SWELL_BIT;
+			else
+				st->wfb_trg &= ~ADE9000_WFB_TRG_SWELL_BIT;
+		} else if (chan->type == IIO_ALTVOLTAGE && dir == IIO_EV_DIR_FALLING) {
+			bit_mask = ADE9000_ST1_DIPA_BIT;
+			if (state)
+				st->wfb_trg |= ADE9000_WFB_TRG_DIP_BIT;
+			else
+				st->wfb_trg &= ~ADE9000_WFB_TRG_DIP_BIT;
+		} else {
+			dev_err_ratelimited(&indio_dev->dev, "Invalid channel type %d or direction %d for phase A\n",
+					    chan->type, dir);
+			return -EINVAL;
+		}
+		break;
+	case ADE9000_PHASE_B_NR:
+		if (chan->type == IIO_VOLTAGE && dir == IIO_EV_DIR_EITHER) {
+			bit_mask = ADE9000_ST1_ZXVB_BIT;
+			if (state)
+				st->wfb_trg |= ADE9000_WFB_TRG_ZXVB_BIT;
+			else
+				st->wfb_trg &= ~ADE9000_WFB_TRG_ZXVB_BIT;
+		} else if (chan->type == IIO_CURRENT && dir == IIO_EV_DIR_EITHER) {
+			bit_mask = ADE9000_ST1_ZXIB_BIT;
+			if (state)
+				st->wfb_trg |= ADE9000_WFB_TRG_ZXIB_BIT;
+			else
+				st->wfb_trg &= ~ADE9000_WFB_TRG_ZXIB_BIT;
+		} else if (chan->type == IIO_ALTVOLTAGE && dir == IIO_EV_DIR_RISING) {
+			bit_mask = ADE9000_ST1_SWELLB_BIT;
+			if (state)
+				st->wfb_trg |= ADE9000_WFB_TRG_SWELL_BIT;
+			else
+				st->wfb_trg &= ~ADE9000_WFB_TRG_SWELL_BIT;
+		} else if (chan->type == IIO_ALTVOLTAGE && dir == IIO_EV_DIR_FALLING) {
+			bit_mask = ADE9000_ST1_DIPB_BIT;
+			if (state)
+				st->wfb_trg |= ADE9000_WFB_TRG_DIP_BIT;
+			else
+				st->wfb_trg &= ~ADE9000_WFB_TRG_DIP_BIT;
+		} else {
+			dev_err_ratelimited(&indio_dev->dev,
+					    "Invalid channel type %d or direction %d for phase B\n",
+					    chan->type, dir);
+			return -EINVAL;
+		}
+		break;
+	case ADE9000_PHASE_C_NR:
+		if (chan->type == IIO_VOLTAGE && dir == IIO_EV_DIR_EITHER) {
+			bit_mask = ADE9000_ST1_ZXVC_BIT;
+			if (state)
+				st->wfb_trg |= ADE9000_WFB_TRG_ZXVC_BIT;
+			else
+				st->wfb_trg &= ~ADE9000_WFB_TRG_ZXVC_BIT;
+		} else if (chan->type == IIO_CURRENT && dir == IIO_EV_DIR_EITHER) {
+			bit_mask = ADE9000_ST1_ZXIC_BIT;
+			if (state)
+				st->wfb_trg |= ADE9000_WFB_TRG_ZXIC_BIT;
+			else
+				st->wfb_trg &= ~ADE9000_WFB_TRG_ZXIC_BIT;
+		} else if (chan->type == IIO_ALTVOLTAGE && dir == IIO_EV_DIR_RISING) {
+			bit_mask = ADE9000_ST1_SWELLC_BIT;
+			if (state)
+				st->wfb_trg |= ADE9000_WFB_TRG_SWELL_BIT;
+			else
+				st->wfb_trg &= ~ADE9000_WFB_TRG_SWELL_BIT;
+		} else if (chan->type == IIO_ALTVOLTAGE && dir == IIO_EV_DIR_FALLING) {
+			bit_mask = ADE9000_ST1_DIPC_BIT;
+			if (state)
+				st->wfb_trg |= ADE9000_WFB_TRG_DIP_BIT;
+			else
+				st->wfb_trg &= ~ADE9000_WFB_TRG_DIP_BIT;
+		} else {
+			dev_err_ratelimited(&indio_dev->dev,
+					    "Invalid channel type %d or direction %d for phase C\n",
+					    chan->type, dir);
+			return -EINVAL;
+		}
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	/* Set bits if enabling event, clear bits if disabling */
+	return regmap_assign_bits(st->regmap, ADE9000_REG_MASK1, bit_mask, state ? bit_mask : 0);
+}
+
+static int ade9000_write_event_value(struct iio_dev *indio_dev,
+				     const struct iio_chan_spec *chan,
+				     enum iio_event_type type,
+				     enum iio_event_direction dir,
+				     enum iio_event_info info,
+				     int val, int val2)
+{
+	struct ade9000_state *st = iio_priv(indio_dev);
+
+	switch (info) {
+	case IIO_EV_INFO_VALUE:
+		switch (dir) {
+		case IIO_EV_DIR_FALLING:
+			return regmap_write(st->regmap, ADE9000_REG_DIP_LVL, val);
+		case IIO_EV_DIR_RISING:
+			return regmap_write(st->regmap, ADE9000_REG_SWELL_LVL, val);
+		default:
+			return -EINVAL;
+		}
+	default:
+		return -EINVAL;
+	}
+}
+
+static int ade9000_read_event_value(struct iio_dev *indio_dev,
+				    const struct iio_chan_spec *chan,
+				    enum iio_event_type type,
+				    enum iio_event_direction dir,
+				    enum iio_event_info info,
+				    int *val, int *val2)
+{
+	struct ade9000_state *st = iio_priv(indio_dev);
+	unsigned int data;
+	int ret;
+
+	switch (info) {
+	case IIO_EV_INFO_VALUE:
+		switch (dir) {
+		case IIO_EV_DIR_FALLING:
+			ret = regmap_read(st->regmap, ADE9000_REG_DIP_LVL, &data);
+			if (ret)
+				return ret;
+			*val = data;
+			return IIO_VAL_INT;
+		case IIO_EV_DIR_RISING:
+			ret = regmap_read(st->regmap, ADE9000_REG_SWELL_LVL, &data);
+			if (ret)
+				return ret;
+			*val = data;
+			return IIO_VAL_INT;
+		default:
+			return -EINVAL;
+		}
+	default:
+		return -EINVAL;
+	}
+}
+
+static int ade9000_waveform_buffer_config(struct iio_dev *indio_dev)
+{
+	struct ade9000_state *st = iio_priv(indio_dev);
+	u32 wfb_cfg_val;
+	u32 active_scans;
+
+	bitmap_to_arr32(&active_scans, indio_dev->active_scan_mask,
+			iio_get_masklength(indio_dev));
+
+	switch (active_scans) {
+	case ADE9000_SCAN_POS_IA | ADE9000_SCAN_POS_VA:
+		wfb_cfg_val = ADE9000_WFB_CFG_IA_VA;
+		st->wfb_nr_activ_chan = 2;
+		break;
+	case ADE9000_SCAN_POS_IB | ADE9000_SCAN_POS_VB:
+		wfb_cfg_val = ADE9000_WFB_CFG_IB_VB;
+		st->wfb_nr_activ_chan = 2;
+		break;
+	case ADE9000_SCAN_POS_IC | ADE9000_SCAN_POS_VC:
+		wfb_cfg_val = ADE9000_WFB_CFG_IC_VC;
+		st->wfb_nr_activ_chan = 2;
+		break;
+	case ADE9000_SCAN_POS_IA:
+		wfb_cfg_val = ADE9000_WFB_CFG_IA;
+		st->wfb_nr_activ_chan = 1;
+		break;
+	case ADE9000_SCAN_POS_VA:
+		wfb_cfg_val = ADE9000_WFB_CFG_VA;
+		st->wfb_nr_activ_chan = 1;
+		break;
+	case ADE9000_SCAN_POS_IB:
+		wfb_cfg_val = ADE9000_WFB_CFG_IB;
+		st->wfb_nr_activ_chan = 1;
+		break;
+	case ADE9000_SCAN_POS_VB:
+		wfb_cfg_val = ADE9000_WFB_CFG_VB;
+		st->wfb_nr_activ_chan = 1;
+		break;
+	case ADE9000_SCAN_POS_IC:
+		wfb_cfg_val = ADE9000_WFB_CFG_IC;
+		st->wfb_nr_activ_chan = 1;
+		break;
+	case ADE9000_SCAN_POS_VC:
+		wfb_cfg_val = ADE9000_WFB_CFG_VC;
+		st->wfb_nr_activ_chan = 1;
+		break;
+	case (ADE9000_SCAN_POS_IA | ADE9000_SCAN_POS_VA | ADE9000_SCAN_POS_IB |
+	      ADE9000_SCAN_POS_VB | ADE9000_SCAN_POS_IC | ADE9000_SCAN_POS_VC):
+		wfb_cfg_val = ADE9000_WFB_CFG_ALL_CHAN;
+		st->wfb_nr_activ_chan = 6;
+		break;
+	default:
+		dev_err(&st->spi->dev, "Unsupported combination of scans\n");
+		return -EINVAL;
+	}
+
+	wfb_cfg_val |= FIELD_PREP(ADE9000_WF_SRC_MASK, st->wf_src);
+
+	return regmap_write(st->regmap, ADE9000_REG_WFB_CFG, wfb_cfg_val);
+}
+
+static int ade9000_waveform_buffer_interrupt_setup(struct ade9000_state *st)
+{
+	int ret;
+
+	ret = regmap_write(st->regmap, ADE9000_REG_WFB_TRG_CFG, 0x0);
+	if (ret)
+		return ret;
+
+	/* Always use streaming mode setup */
+	ret = regmap_write(st->regmap, ADE9000_REG_WFB_PG_IRQEN,
+			   ADE9000_MIDDLE_PAGE_BIT);
+	if (ret)
+		return ret;
+
+	ret = regmap_write(st->regmap, ADE9000_REG_STATUS0, GENMASK(31, 0));
+	if (ret)
+		return ret;
+
+	return regmap_set_bits(st->regmap, ADE9000_REG_MASK0,
+			       ADE9000_ST0_PAGE_FULL_BIT);
+}
+
+static int ade9000_buffer_preenable(struct iio_dev *indio_dev)
+{
+	struct ade9000_state *st = iio_priv(indio_dev);
+	int ret;
+
+	ret = ade9000_waveform_buffer_config(indio_dev);
+	if (ret)
+		return ret;
+
+	st->wfb_nr_samples = ADE9000_WFB_MAX_SAMPLES_CHAN * st->wfb_nr_activ_chan;
+
+	ade9000_configure_scan(indio_dev, ADE9000_REG_WF_BUFF);
+
+	ret = ade9000_waveform_buffer_interrupt_setup(st);
+	if (ret)
+		return ret;
+
+	ret = regmap_set_bits(st->regmap, ADE9000_REG_WFB_CFG,
+			      ADE9000_WF_CAP_EN_MASK);
+	if (ret) {
+		dev_err(&st->spi->dev, "Post-enable waveform buffer enable fail\n");
+		return ret;
+	}
+
+	return 0;
+}
+
+static int ade9000_buffer_postdisable(struct iio_dev *indio_dev)
+{
+	struct ade9000_state *st = iio_priv(indio_dev);
+	struct device *dev = &st->spi->dev;
+	u32 interrupts;
+	int ret;
+
+	ret = regmap_clear_bits(st->regmap, ADE9000_REG_WFB_CFG,
+				ADE9000_WF_CAP_EN_MASK);
+	if (ret) {
+		dev_err(dev, "Post-disable waveform buffer disable fail\n");
+		return ret;
+	}
+
+	ret = regmap_write(st->regmap, ADE9000_REG_WFB_TRG_CFG, 0x0);
+	if (ret)
+		return ret;
+
+	interrupts = ADE9000_ST0_WFB_TRIG_BIT | ADE9000_ST0_PAGE_FULL_BIT;
+
+	ret = regmap_clear_bits(st->regmap, ADE9000_REG_MASK0, interrupts);
+	if (ret) {
+		dev_err(dev, "Post-disable update maks0 fail\n");
+		return ret;
+	}
+
+	return regmap_write(st->regmap, ADE9000_REG_STATUS0, GENMASK(31, 0));
+}
+
+static const struct iio_buffer_setup_ops ade9000_buffer_ops = {
+	.preenable = &ade9000_buffer_preenable,
+	.postdisable = &ade9000_buffer_postdisable,
+};
+
+static int ade9000_reset(struct ade9000_state *st)
+{
+	struct device *dev = &st->spi->dev;
+	struct gpio_desc *gpio_reset;
+	int ret;
+
+	gpio_reset = devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_HIGH);
+	if (IS_ERR(gpio_reset))
+		return PTR_ERR(gpio_reset);
+
+	/* Software reset via register if no GPIO available */
+	if (!gpio_reset) {
+		ret = regmap_set_bits(st->regmap, ADE9000_REG_CONFIG1,
+				      ADE9000_SWRST_BIT);
+		if (ret)
+			return ret;
+		fsleep(90);
+		return 0;
+	}
+
+	/* Hardware reset via GPIO */
+	fsleep(10);
+	gpiod_set_value_cansleep(gpio_reset, 0);
+	fsleep(50000);
+
+	/* Only wait for completion if IRQ1 is available to signal reset done */
+	if (fwnode_irq_get_byname(dev_fwnode(dev), "irq1") >= 0) {
+		if (!wait_for_completion_timeout(&st->reset_completion,
+						 msecs_to_jiffies(1000))) {
+			dev_err(dev, "Reset timeout after 1s\n");
+			return -ETIMEDOUT;
+		}
+	}
+	/* If no IRQ available, reset is already complete after the 50ms delay above */
+
+	return 0;
+}
+
+static int ade9000_setup(struct ade9000_state *st)
+{
+	struct device *dev = &st->spi->dev;
+	int ret;
+
+	ret = regmap_multi_reg_write(st->regmap, ade9000_initialization_sequence,
+				     ARRAY_SIZE(ade9000_initialization_sequence));
+	if (ret)
+		return dev_err_probe(dev, ret, "Failed to write register sequence");
+
+	fsleep(2000);
+
+	return 0;
+}
+
+static const struct iio_info ade9000_info = {
+	.read_raw = ade9000_read_raw,
+	.write_raw = ade9000_write_raw,
+	.debugfs_reg_access = ade9000_reg_access,
+	.write_event_config = ade9000_write_event_config,
+	.read_event_config = ade9000_read_event_config,
+	.write_event_value = ade9000_write_event_value,
+	.read_event_value = ade9000_read_event_value,
+};
+
+static const struct regmap_config ade9000_regmap_config = {
+	.reg_bits = 16,
+	.val_bits = 32,
+	.max_register = 0x6bc,
+	.zero_flag_mask = true,
+	.cache_type = REGCACHE_RBTREE,
+	.reg_read = ade9000_spi_read_reg,
+	.reg_write = ade9000_spi_write_reg,
+	.volatile_reg = ade9000_is_volatile_reg,
+};
+
+static int ade9000_setup_clkout(struct device *dev, struct ade9000_state *st)
+{
+	struct clk_hw *clkout_hw;
+	int ret;
+
+	if (!IS_ENABLED(CONFIG_COMMON_CLK))
+		return 0;
+
+	/*
+	 * Only provide clock output when using external CMOS clock.
+	 * When using crystal, CLKOUT is connected to crystal and shouldn't
+	 * be used as clock provider for other devices.
+	 */
+	if (!device_property_present(dev, "#clock-cells") || !st->clkin)
+		return 0;
+
+	/* CLKOUT passes through CLKIN with divider of 1 */
+	clkout_hw = devm_clk_hw_register_divider(dev, "clkout", __clk_get_name(st->clkin),
+						 CLK_SET_RATE_PARENT, NULL, 0, 1, 0, NULL);
+	if (IS_ERR(clkout_hw))
+		return dev_err_probe(dev, PTR_ERR(clkout_hw), "Failed to register clkout");
+
+	ret = devm_of_clk_add_hw_provider(dev, of_clk_hw_simple_get, clkout_hw);
+	if (ret)
+		return dev_err_probe(dev, ret, "Failed to add clock provider");
+
+	return 0;
+}
+
+static int ade9000_request_irq(struct device *dev, const char *name,
+			       irq_handler_t handler, void *dev_id)
+{
+	int irq, ret;
+
+	irq = fwnode_irq_get_byname(dev_fwnode(dev), name);
+	if (irq == -EINVAL)
+		return 0; /* interrupts are optional */
+	if (irq < 0)
+		return dev_err_probe(dev, irq, "Failed to get %s irq", name);
+
+	ret = devm_request_threaded_irq(dev, irq, NULL, handler,
+					IRQF_ONESHOT, KBUILD_MODNAME, dev_id);
+	if (ret)
+		return dev_err_probe(dev, ret, "Failed to request %s irq", name);
+
+	return 0;
+}
+
+static int ade9000_probe(struct spi_device *spi)
+{
+	struct device *dev = &spi->dev;
+	struct iio_dev *indio_dev;
+	struct ade9000_state *st;
+	struct regmap *regmap;
+	int ret;
+
+	indio_dev = devm_iio_device_alloc(dev, sizeof(*st));
+	if (!indio_dev)
+		return -ENOMEM;
+
+	st = iio_priv(indio_dev);
+
+	regmap = devm_regmap_init(dev, NULL, st, &ade9000_regmap_config);
+	if (IS_ERR(regmap))
+		return dev_err_probe(dev, PTR_ERR(regmap), "Unable to allocate ADE9000 regmap");
+
+	st->regmap = regmap;
+	st->spi = spi;
+
+	init_completion(&st->reset_completion);
+
+	ret = ade9000_request_irq(dev, "irq0", ade9000_irq0_thread, indio_dev);
+	if (ret)
+		return ret;
+
+	ret = ade9000_request_irq(dev, "irq1", ade9000_irq1_thread, indio_dev);
+	if (ret)
+		return ret;
+
+	ret = ade9000_request_irq(dev, "dready", ade9000_dready_thread, indio_dev);
+	if (ret)
+		return ret;
+
+	ret = devm_mutex_init(dev, &st->lock);
+	if (ret)
+		return ret;
+
+	/* External CMOS clock input (optional - crystal can be used instead) */
+	st->clkin = devm_clk_get_optional_enabled(dev, NULL);
+	if (IS_ERR(st->clkin))
+		return dev_err_probe(dev, PTR_ERR(st->clkin), "Failed to get and enable clkin");
+
+	ret = ade9000_setup_clkout(dev, st);
+	if (ret)
+		return ret;
+
+	indio_dev->name = "ade9000";
+	indio_dev->info = &ade9000_info;
+	indio_dev->modes = INDIO_DIRECT_MODE;
+	indio_dev->setup_ops = &ade9000_buffer_ops;
+
+	ret = devm_regulator_get_enable(&spi->dev, "vdd");
+	if (ret)
+		return dev_err_probe(&spi->dev, ret,
+				     "Failed to get and enable vdd regulator\n");
+
+	indio_dev->channels = ade9000_channels;
+	indio_dev->num_channels = ARRAY_SIZE(ade9000_channels);
+
+	ret = devm_iio_kfifo_buffer_setup(dev, indio_dev,
+					  &ade9000_buffer_ops);
+	if (ret)
+		return dev_err_probe(dev, ret, "Failed to setup IIO buffer");
+
+	ret = ade9000_reset(st);
+	if (ret)
+		return ret;
+
+	/* Configure reference selection if vref regulator is available */
+	ret = devm_regulator_get_enable_optional(dev, "vref");
+	if (ret != -ENODEV && ret >= 0) {
+		ret = regmap_set_bits(st->regmap, ADE9000_REG_CONFIG1,
+				      ADE9000_EXT_REF_MASK);
+		if (ret)
+			return ret;
+	} else if (ret < 0 && ret != -ENODEV) {
+		return dev_err_probe(dev, ret,
+				     "Failed to get and enable vref regulator\n");
+	}
+
+	ret = ade9000_setup(st);
+	if (ret)
+		return ret;
+
+	return devm_iio_device_register(dev, indio_dev);
+};
+
+static const struct spi_device_id ade9000_id[] = {
+	{ "ade9000", 0 },
+	{ }
+};
+MODULE_DEVICE_TABLE(spi, ade9000_id);
+
+static const struct of_device_id ade9000_of_match[] = {
+	{ .compatible = "adi,ade9000" },
+	{ }
+};
+MODULE_DEVICE_TABLE(of, ade9000_of_match);
+
+static struct spi_driver ade9000_driver = {
+	.driver = {
+		.name = "ade9000",
+		.of_match_table = ade9000_of_match,
+	},
+	.probe = ade9000_probe,
+	.id_table = ade9000_id,
+};
+module_spi_driver(ade9000_driver);
+
+MODULE_AUTHOR("Antoniu Miclaus <[e-mail]>");
+MODULE_DESCRIPTION("Analog Devices ADE9000");
+MODULE_LICENSE("GPL");

drivers/iio/adc/adi-axi-adc.c

···
 	.chan_status = axi_adc_chan_status,
 	.interface_type_get = axi_adc_interface_type_get,
 	.oversampling_ratio_set = axi_adc_oversampling_ratio_set,
+	.num_lanes_set = axi_adc_num_lanes_set,
 	.debugfs_reg_access = iio_backend_debugfs_ptr(axi_adc_reg_access),
 	.debugfs_print_chan_status = iio_backend_debugfs_ptr(axi_adc_debugfs_print_chan_status),
 };

drivers/iio/adc/at91-sama5d2_adc.c

···
 	emr |= osr | AT91_SAMA5D2_TRACKX(trackx);
 	at91_adc_writel(st, EMR, emr);
 
-	pm_runtime_mark_last_busy(st->dev);
 	pm_runtime_put_autosuspend(st->dev);
 
 	st->oversampling_ratio = oversampling_ratio;
···
 				AT91_SAMA5D2_IER_PEN | AT91_SAMA5D2_IER_NOPEN);
 		at91_adc_writel(st, TSMR, 0);
 
-		pm_runtime_mark_last_busy(st->dev);
 		pm_runtime_put_autosuspend(st->dev);
 		return 0;
 	}
···
 
 	at91_adc_configure_trigger_registers(st, state);
 
-	if (!state) {
-		pm_runtime_mark_last_busy(st->dev);
+	if (!state)
 		pm_runtime_put_autosuspend(st->dev);
-	}
 
 	return 0;
 }
···
 		at91_adc_writel(st, IER, AT91_SAMA5D2_IER_DRDY);
 
 pm_runtime_put:
-	pm_runtime_mark_last_busy(st->dev);
 	pm_runtime_put_autosuspend(st->dev);
 	return ret;
 }
···
 	if (st->dma_st.dma_chan)
 		dmaengine_terminate_sync(st->dma_st.dma_chan);
 
-	pm_runtime_mark_last_busy(st->dev);
 	pm_runtime_put_autosuspend(st->dev);
 
 	return 0;
···
 	mr |= AT91_SAMA5D2_MR_TRACKTIM(tracktim);
 	at91_adc_writel(st, MR, mr);
 
-	pm_runtime_mark_last_busy(st->dev);
 	pm_runtime_put_autosuspend(st->dev);
 
 	dev_dbg(&indio_dev->dev, "freq: %u, startup: %u, prescal: %u, tracktim=%u\n",
···
 	at91_adc_readl(st, LCDR);
 
 pm_runtime_put:
-	pm_runtime_mark_last_busy(st->dev);
 	pm_runtime_put_autosuspend(st->dev);
 	return ret;
 }
···
 restore_config:
 	/* Revert previous settings. */
 	at91_adc_temp_sensor_configure(st, false);
-	pm_runtime_mark_last_busy(st->dev);
 	pm_runtime_put_autosuspend(st->dev);
 	if (ret < 0)
 		return ret;
···
 	dev_info(&pdev->dev, "version: %x\n",
 		 readl_relaxed(st->base + st->soc_info.platform->layout->VERSION));
 
-	pm_runtime_mark_last_busy(st->dev);
 	pm_runtime_put_autosuspend(st->dev);
 
 	return 0;
···
 		at91_adc_configure_trigger_registers(st, true);
 	}
 
-	pm_runtime_mark_last_busy(st->dev);
 	pm_runtime_put_autosuspend(st->dev);
 
 	return 0;

drivers/iio/adc/bcm_iproc_adc.c

···
 
 	indio_dev = devm_iio_device_alloc(&pdev->dev,
 					sizeof(*adc_priv));
-	if (!indio_dev) {
-		dev_err(&pdev->dev, "failed to allocate iio device\n");
+	if (!indio_dev)
 		return -ENOMEM;
-	}
 
 	adc_priv = iio_priv(indio_dev);
 	platform_set_drvdata(pdev, indio_dev);

drivers/iio/adc/cpcap-adc.c

···
 	int error;
 
 	indio_dev = devm_iio_device_alloc(&pdev->dev, sizeof(*ddata));
-	if (!indio_dev) {
-		dev_err(&pdev->dev, "failed to allocate iio device\n");
-
+	if (!indio_dev)
 		return -ENOMEM;
-	}
+
 	ddata = iio_priv(indio_dev);
 	ddata->ato = device_get_match_data(&pdev->dev);
 	if (!ddata->ato)

drivers/iio/adc/da9150-gpadc.c

···
 	int irq, ret;
 
 	indio_dev = devm_iio_device_alloc(dev, sizeof(*gpadc));
-	if (!indio_dev) {
-		dev_err(&pdev->dev, "Failed to allocate IIO device\n");
+	if (!indio_dev)
 		return -ENOMEM;
-	}
+
 	gpadc = iio_priv(indio_dev);
 
 	gpadc->da9150 = da9150;

drivers/iio/adc/dln2-adc.c

···
 	int i, ret, chans;
 
 	indio_dev = devm_iio_device_alloc(dev, sizeof(*dln2));
-	if (!indio_dev) {
-		dev_err(dev, "failed allocating iio device\n");
+	if (!indio_dev)
 		return -ENOMEM;
-	}
 
 	dln2 = iio_priv(indio_dev);
 	dln2->pdev = pdev;
···
 	dln2->trig = devm_iio_trigger_alloc(dev, "%s-dev%d",
 					    indio_dev->name,
 					    iio_device_id(indio_dev));
-	if (!dln2->trig) {
-		dev_err(dev, "failed to allocate trigger\n");
+	if (!dln2->trig)
 		return -ENOMEM;
-	}
+
 	iio_trigger_set_drvdata(dln2->trig, dln2);
 	ret = devm_iio_trigger_register(dev, dln2->trig);
 	if (ret) {

drivers/iio/adc/exynos_adc.c

···
 #include <linux/clk.h>
 #include <linux/completion.h>
 #include <linux/of.h>
-#include <linux/of_irq.h>
 #include <linux/regulator/consumer.h>
 #include <linux/of_platform.h>
 #include <linux/err.h>
-#include <linux/input.h>
 
 #include <linux/iio/iio.h>
 #include <linux/iio/machine.h>
···
 #include <linux/mfd/syscon.h>
 #include <linux/regmap.h>
 
-#include <linux/platform_data/touchscreen-s3c2410.h>
-
 /* S3C/EXYNOS4412/5250 ADC_V1 registers definitions */
 #define ADC_V1_CON(x)		((x) + 0x00)
-#define ADC_V1_TSC(x)		((x) + 0x04)
 #define ADC_V1_DLY(x)		((x) + 0x08)
 #define ADC_V1_DATX(x)		((x) + 0x0C)
 #define ADC_V1_DATY(x)		((x) + 0x10)
 #define ADC_V1_UPDN(x)		((x) + 0x14)
 #define ADC_V1_INTCLR(x)	((x) + 0x18)
 #define ADC_V1_MUX(x)		((x) + 0x1c)
-#define ADC_V1_CLRINTPNDNUP(x)	((x) + 0x20)
-
-/* S3C2410 ADC registers definitions */
-#define ADC_S3C2410_MUX(x)	((x) + 0x18)
 
 /* Future ADC_V2 registers definitions */
 #define ADC_V2_CON1(x)		((x) + 0x00)
···
 #define ADC_V1_CON_PRSCLV(x)	(((x) & 0xFF) << 6)
 #define ADC_V1_CON_STANDBY	(1u << 2)
 
-/* Bit definitions for S3C2410 ADC */
+/* Bit definitions for S3C2410 / S3C6410 ADC */
 #define ADC_S3C2410_CON_SELMUX(x) (((x) & 7) << 3)
-#define ADC_S3C2410_DATX_MASK	0x3FF
-#define ADC_S3C2416_CON_RES_SEL	(1u << 3)
-
-/* touch screen always uses channel 0 */
-#define ADC_S3C2410_MUX_TS	0
 
 /* ADCTSC Register Bits */
 #define ADC_S3C2443_TSC_UD_SEN		(1u << 8)
···
 #define ADC_S3C2410_TSC_YP_SEN		(1u << 6)
 #define ADC_S3C2410_TSC_XM_SEN		(1u << 5)
 #define ADC_S3C2410_TSC_XP_SEN		(1u << 4)
-#define ADC_S3C2410_TSC_PULL_UP_DISABLE	(1u << 3)
-#define ADC_S3C2410_TSC_AUTO_PST	(1u << 2)
 #define ADC_S3C2410_TSC_XY_PST(x)	(((x) & 0x3) << 0)
 
 #define ADC_TSC_WAIT4INT (ADC_S3C2410_TSC_YM_SEN | \
 			 ADC_S3C2410_TSC_YP_SEN | \
 			 ADC_S3C2410_TSC_XP_SEN | \
 			 ADC_S3C2410_TSC_XY_PST(3))
-
-#define ADC_TSC_AUTOPST	(ADC_S3C2410_TSC_YM_SEN | \
-			 ADC_S3C2410_TSC_YP_SEN | \
-			 ADC_S3C2410_TSC_XP_SEN | \
-			 ADC_S3C2410_TSC_AUTO_PST | \
-			 ADC_S3C2410_TSC_XY_PST(0))
 
 /* Bit definitions for ADC_V2 */
 #define ADC_V2_CON1_SOFT_RESET	(1u << 2)
···
 struct exynos_adc {
 	struct exynos_adc_data	*data;
 	struct device		*dev;
-	struct input_dev	*input;
 	void __iomem		*regs;
 	struct regmap		*pmu_map;
 	struct clk		*clk;
 	struct clk		*sclk;
 	unsigned int		irq;
-	unsigned int		tsirq;
-	unsigned int		delay;
 	struct regulator	*vdd;
 
 	struct completion	completion;
 
 	u32			value;
 	unsigned int            version;
-
-	bool			ts_enabled;
-
-	bool			read_ts;
-	u32			ts_x;
-	u32			ts_y;
 
 	/*
 	 * Lock to protect from potential concurrent access to the
···
 	writel(con1, ADC_V1_CON(info->regs));
 
 	/* set touchscreen delay */
-	writel(info->delay, ADC_V1_DLY(info->regs));
+	writel(10000, ADC_V1_DLY(info->regs));
 }
 
 static void exynos_adc_v1_exit_hw(struct exynos_adc *info)
···
 	.start_conv	= exynos_adc_v1_start_conv,
 };
 
-static void exynos_adc_s3c2416_start_conv(struct exynos_adc *info,
-					  unsigned long addr)
-{
-	u32 con1;
-
-	/* Enable 12 bit ADC resolution */
-	con1 = readl(ADC_V1_CON(info->regs));
-	con1 |= ADC_S3C2416_CON_RES_SEL;
-	writel(con1, ADC_V1_CON(info->regs));
-
-	/* Select channel for S3C2416 */
-	writel(addr, ADC_S3C2410_MUX(info->regs));
-
-	con1 = readl(ADC_V1_CON(info->regs));
-	writel(con1 | ADC_CON_EN_START, ADC_V1_CON(info->regs));
-}
-
-static struct exynos_adc_data const exynos_adc_s3c2416_data = {
-	.num_channels	= MAX_ADC_V1_CHANNELS,
-	.mask		= ADC_DATX_MASK,	/* 12 bit ADC resolution */
-
-	.init_hw	= exynos_adc_v1_init_hw,
-	.exit_hw	= exynos_adc_v1_exit_hw,
-	.start_conv	= exynos_adc_s3c2416_start_conv,
-};
-
-static void exynos_adc_s3c2443_start_conv(struct exynos_adc *info,
-					  unsigned long addr)
-{
-	u32 con1;
-
-	/* Select channel for S3C2433 */
-	writel(addr, ADC_S3C2410_MUX(info->regs));
-
-	con1 = readl(ADC_V1_CON(info->regs));
-	writel(con1 | ADC_CON_EN_START, ADC_V1_CON(info->regs));
-}
-
-static struct exynos_adc_data const exynos_adc_s3c2443_data = {
-	.num_channels	= MAX_ADC_V1_CHANNELS,
-	.mask		= ADC_S3C2410_DATX_MASK, /* 10 bit ADC resolution */
-
-	.init_hw	= exynos_adc_v1_init_hw,
-	.exit_hw	= exynos_adc_v1_exit_hw,
-	.start_conv	= exynos_adc_s3c2443_start_conv,
-};
-
 static void exynos_adc_s3c64xx_start_conv(struct exynos_adc *info,
 					  unsigned long addr)
 {
···
 	con1 |= ADC_S3C2410_CON_SELMUX(addr);
 	writel(con1 | ADC_CON_EN_START, ADC_V1_CON(info->regs));
 }
-
-static struct exynos_adc_data const exynos_adc_s3c24xx_data = {
-	.num_channels	= MAX_ADC_V1_CHANNELS,
-	.mask		= ADC_S3C2410_DATX_MASK, /* 10 bit ADC resolution */
-
-	.init_hw	= exynos_adc_v1_init_hw,
-	.exit_hw	= exynos_adc_v1_exit_hw,
-	.start_conv	= exynos_adc_s3c64xx_start_conv,
-};
 
 static struct exynos_adc_data const exynos_adc_s3c64xx_data = {
 	.num_channels	= MAX_ADC_V1_CHANNELS,
···
 
 static const struct of_device_id exynos_adc_match[] = {
 	{
-		.compatible = "samsung,s3c2410-adc",
-		.data = &exynos_adc_s3c24xx_data,
-	}, {
-		.compatible = "samsung,s3c2416-adc",
-		.data = &exynos_adc_s3c2416_data,
-	}, {
-		.compatible = "samsung,s3c2440-adc",
-		.data = &exynos_adc_s3c24xx_data,
-	}, {
-		.compatible = "samsung,s3c2443-adc",
-		.data = &exynos_adc_s3c2443_data,
-	}, {
 		.compatible = "samsung,s3c6410-adc",
 		.data = &exynos_adc_s3c64xx_data,
 	}, {
···
 	return ret;
 }
 
-static int exynos_read_s3c64xx_ts(struct iio_dev *indio_dev, int *x, int *y)
-{
-	struct exynos_adc *info = iio_priv(indio_dev);
-	unsigned long time_left;
-	int ret;
-
-	mutex_lock(&info->lock);
-	info->read_ts = true;
-
-	reinit_completion(&info->completion);
-
-	writel(ADC_S3C2410_TSC_PULL_UP_DISABLE | ADC_TSC_AUTOPST,
-	       ADC_V1_TSC(info->regs));
-
-	/* Select the ts channel to be used and Trigger conversion */
-	info->data->start_conv(info, ADC_S3C2410_MUX_TS);
-
-	time_left = wait_for_completion_timeout(&info->completion,
-						EXYNOS_ADC_TIMEOUT);
-	if (time_left == 0) {
-		dev_warn(&indio_dev->dev, "Conversion timed out! Resetting\n");
-		if (info->data->init_hw)
-			info->data->init_hw(info);
-		ret = -ETIMEDOUT;
-	} else {
-		*x = info->ts_x;
-		*y = info->ts_y;
-		ret = 0;
-	}
-
-	info->read_ts = false;
-	mutex_unlock(&info->lock);
-
-	return ret;
-}
-
 static irqreturn_t exynos_adc_isr(int irq, void *dev_id)
 {
 	struct exynos_adc *info = dev_id;
 	u32 mask = info->data->mask;
 
 	/* Read value */
-	if (info->read_ts) {
-		info->ts_x = readl(ADC_V1_DATX(info->regs));
-		info->ts_y = readl(ADC_V1_DATY(info->regs));
-		writel(ADC_TSC_WAIT4INT | ADC_S3C2443_TSC_UD_SEN, ADC_V1_TSC(info->regs));
-	} else {
-		info->value = readl(ADC_V1_DATX(info->regs)) & mask;
-	}
+	info->value = readl(ADC_V1_DATX(info->regs)) & mask;
 
 	/* clear irq */
 	if (info->data->clear_irq)
 		info->data->clear_irq(info);
 
 	complete(&info->completion);
-
-	return IRQ_HANDLED;
-}
-
-/*
- * Here we (ab)use a threaded interrupt handler to stay running
- * for as long as the touchscreen remains pressed, we report
- * a new event with the latest data and then sleep until the
- * next timer tick. This mirrors the behavior of the old
- * driver, with much less code.
- */
-static irqreturn_t exynos_ts_isr(int irq, void *dev_id)
-{
-	struct exynos_adc *info = dev_id;
-	struct iio_dev *dev = dev_get_drvdata(info->dev);
-	u32 x, y;
-	bool pressed;
-	int ret;
-
-	while (READ_ONCE(info->ts_enabled)) {
-		ret = exynos_read_s3c64xx_ts(dev, &x, &y);
-		if (ret == -ETIMEDOUT)
-			break;
-
-		pressed = x & y & ADC_DATX_PRESSED;
-		if (!pressed) {
-			input_report_key(info->input, BTN_TOUCH, 0);
-			input_sync(info->input);
-			break;
-		}
-
-		input_report_abs(info->input, ABS_X, x & ADC_DATX_MASK);
-		input_report_abs(info->input, ABS_Y, y & ADC_DATY_MASK);
-		input_report_key(info->input, BTN_TOUCH, 1);
-		input_sync(info->input);
-
-		usleep_range(1000, 1100);
-	}
-
-	writel(0, ADC_V1_CLRINTPNDNUP(info->regs));
 
 	return IRQ_HANDLED;
 }
···
 	return 0;
 }
 
-static int exynos_adc_ts_open(struct input_dev *dev)
-{
-	struct exynos_adc *info = input_get_drvdata(dev);
-
-	WRITE_ONCE(info->ts_enabled, true);
-	enable_irq(info->tsirq);
-
-	return 0;
-}
-
-static void exynos_adc_ts_close(struct input_dev *dev)
-{
-	struct exynos_adc *info = input_get_drvdata(dev);
-
-	WRITE_ONCE(info->ts_enabled, false);
-	disable_irq(info->tsirq);
-}
-
-static int exynos_adc_ts_init(struct exynos_adc *info)
-{
-	int ret;
-
-	if (info->tsirq <= 0)
-		return -ENODEV;
-
-	info->input = input_allocate_device();
-	if (!info->input)
-		return -ENOMEM;
-
-	info->input->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
-	info->input->keybit[BIT_WORD(BTN_TOUCH)] = BIT_MASK(BTN_TOUCH);
-
-	input_set_abs_params(info->input, ABS_X, 0, 0x3FF, 0, 0);
-	input_set_abs_params(info->input, ABS_Y, 0, 0x3FF, 0, 0);
-
-	info->input->name = "S3C24xx TouchScreen";
-	info->input->id.bustype = BUS_HOST;
-	info->input->open = exynos_adc_ts_open;
-	info->input->close = exynos_adc_ts_close;
-
-	input_set_drvdata(info->input, info);
-
-	ret = input_register_device(info->input);
-	if (ret) {
-		input_free_device(info->input);
-		return ret;
-	}
-
-	ret = request_threaded_irq(info->tsirq, NULL, exynos_ts_isr,
-				   IRQF_ONESHOT | IRQF_NO_AUTOEN,
-				   "touchscreen", info);
-	if (ret)
-		input_unregister_device(info->input);
-
-	return ret;
-}
-
 static int exynos_adc_probe(struct platform_device *pdev)
 {
 	struct exynos_adc *info = NULL;
 	struct device_node *np = pdev->dev.of_node;
-	struct s3c2410_ts_mach_info *pdata = dev_get_platdata(&pdev->dev);
 	struct iio_dev *indio_dev = NULL;
-	bool has_ts = false;
 	int ret;
 	int irq;
 
 	indio_dev = devm_iio_device_alloc(&pdev->dev, sizeof(struct exynos_adc));
-	if (!indio_dev) {
-		dev_err(&pdev->dev, "failed allocating iio device\n");
+	if (!indio_dev)
 		return -ENOMEM;
-	}
 
 	info = iio_priv(indio_dev);
 
···
 		}
 	}
 
-	/* leave out any TS related code if unreachable */
-	if (IS_REACHABLE(CONFIG_INPUT)) {
-		has_ts = of_property_read_bool(pdev->dev.of_node,
-					       "has-touchscreen") || pdata;
-	}
-
 	irq = platform_get_irq(pdev, 0);
 	if (irq < 0)
 		return irq;
 	info->irq = irq;
-
-	if (has_ts) {
-		irq = platform_get_irq(pdev, 1);
-		if (irq == -EPROBE_DEFER)
-			return irq;
-
-		info->tsirq = irq;
-	} else {
-		info->tsirq = -1;
-	}
-
 	info->dev = &pdev->dev;
 
 	init_completion(&info->completion);
···
 	if (info->data->init_hw)
 		info->data->init_hw(info);
 
-	if (pdata)
-		info->delay = pdata->delay;
-	else
-		info->delay = 10000;
-
-	if (has_ts)
-		ret = exynos_adc_ts_init(info);
-	if (ret)
-		goto err_iio;
-
 	ret = of_platform_populate(np, exynos_adc_match, NULL, &indio_dev->dev);
 	if (ret < 0) {
 		dev_err(&pdev->dev, "failed adding child nodes\n");
···
 err_of_populate:
 	device_for_each_child(&indio_dev->dev, NULL,
 				exynos_adc_remove_devices);
-	if (has_ts) {
-		input_unregister_device(info->input);
-		free_irq(info->tsirq, info);
-	}
-err_iio:
 	iio_device_unregister(indio_dev);
 err_irq:
 	free_irq(info->irq, info);
···
 	struct iio_dev *indio_dev = platform_get_drvdata(pdev);
 	struct exynos_adc *info = iio_priv(indio_dev);
 
-	if (IS_REACHABLE(CONFIG_INPUT) && info->input) {
-		free_irq(info->tsirq, info);
-		input_unregister_device(info->input);
-	}
 	device_for_each_child(&indio_dev->dev, NULL,
 				exynos_adc_remove_devices);
 	iio_device_unregister(indio_dev);

drivers/iio/adc/hx711.c

···
 
 	indio_dev = devm_iio_device_alloc(dev, sizeof(struct hx711_data));
 	if (!indio_dev)
-		return dev_err_probe(dev, -ENOMEM, "failed to allocate IIO device\n");
+		return -ENOMEM;
 
 	hx711_data = iio_priv(indio_dev);
 	hx711_data->dev = dev;

drivers/iio/adc/imx7d_adc.c

···
 	int ret;
 
 	indio_dev = devm_iio_device_alloc(dev, sizeof(*info));
-	if (!indio_dev) {
-		dev_err(&pdev->dev, "Failed allocating iio device\n");
+	if (!indio_dev)
 		return -ENOMEM;
-	}
 
 	info = iio_priv(indio_dev);
 	info->dev = dev;

drivers/iio/adc/imx8qxp-adc.c

···
 		ret = wait_for_completion_interruptible_timeout(&adc->completion,
 								IMX8QXP_ADC_TIMEOUT);
 
-		pm_runtime_mark_last_busy(dev);
 		pm_runtime_put_sync_autosuspend(dev);
 
 		if (ret == 0) {
···
 
 	*readval = readl(adc->regs + reg);
 
-	pm_runtime_mark_last_busy(dev);
 	pm_runtime_put_sync_autosuspend(dev);
 
 	return 0;
···
 	int ret;
 
 	indio_dev = devm_iio_device_alloc(dev, sizeof(*adc));
-	if (!indio_dev) {
-		dev_err(dev, "Failed allocating iio device\n");
+	if (!indio_dev)
 		return -ENOMEM;
-	}
 
 	adc = iio_priv(indio_dev);
 	adc->dev = dev;

drivers/iio/adc/imx93_adc.c

···
 #define IMX93_ADC_PCDR0		0x100
 #define IMX93_ADC_PCDR1		0x104
 #define IMX93_ADC_PCDR2		0x108
-#define IMX93_ADC_PCDR3		0x10c
+#define IMX93_ADC_PCDR3		0x10C
 #define IMX93_ADC_PCDR4		0x110
 #define IMX93_ADC_PCDR5		0x114
 #define IMX93_ADC_PCDR6		0x118
-#define IMX93_ADC_PCDR7		0x11c
+#define IMX93_ADC_PCDR7		0x11C
 #define IMX93_ADC_CALSTAT	0x39C
+#define IMX93_ADC_CALCFG0	0x3A0
 
 /* ADC bit shift */
 #define IMX93_ADC_MCR_MODE_MASK			BIT(29)
···
 #define IMX93_ADC_IMR_EOC_MASK			BIT(1)
 #define IMX93_ADC_IMR_ECH_MASK			BIT(0)
 #define IMX93_ADC_PCDR_CDATA_MASK		GENMASK(11, 0)
+
+#define IMX93_ADC_CALCFG0_LDFAIL_MASK		BIT(4)
 
 /* ADC status */
 #define IMX93_ADC_MSR_ADCSTATUS_IDLE			0
···
 
 static int imx93_adc_calibration(struct imx93_adc *adc)
 {
-	u32 mcr, msr;
+	u32 mcr, msr, calcfg;
 	int ret;
 
 	/* make sure ADC in power down mode */
···
 	writel(mcr, adc->regs + IMX93_ADC_MCR);
 
 	imx93_adc_power_up(adc);
+
+	/* Enable loading of calibrated values even in fail condition */
+	calcfg = readl(adc->regs + IMX93_ADC_CALCFG0);
+	calcfg |= IMX93_ADC_CALCFG0_LDFAIL_MASK;
+	writel(calcfg, adc->regs + IMX93_ADC_CALCFG0);
 
 	/*
 	 * TODO: we use the default TSAMP/NRSMPL/AVGEN in MCR,
···
 	/* check whether calbration is success or not */
 	msr = readl(adc->regs + IMX93_ADC_MSR);
 	if (msr & IMX93_ADC_MSR_CALFAIL_MASK) {
+		/*
+		 * Only give warning here, this means the noise of the
+		 * reference voltage do not meet the requirement:
+		 *     ADC reference voltage Noise < 1.8V * 1/2^ENOB
+		 * And the resault of ADC is not that accurate.
+		 */
 		dev_warn(adc->dev, "ADC calibration failed!\n");
-		imx93_adc_power_down(adc);
-		return -EAGAIN;
 	}
 
 	return 0;
···
 		mutex_lock(&adc->lock);
 		ret = imx93_adc_read_channel_conversion(adc, chan->channel, val);
 		mutex_unlock(&adc->lock);
-		pm_runtime_mark_last_busy(dev);
 		pm_runtime_put_sync_autosuspend(dev);
 		if (ret < 0)
 			return ret;
···
 
 	indio_dev = devm_iio_device_alloc(dev, sizeof(*adc));
 	if (!indio_dev)
-		return dev_err_probe(dev, -ENOMEM,
-				     "Failed allocating iio device\n");
+		return -ENOMEM;
 
 	adc = iio_priv(indio_dev);
 	adc->dev = dev;

drivers/iio/adc/intel_dc_ti_adc.c

···
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Intel Dollar Cove TI PMIC GPADC Driver
+ *
+ * Copyright (C) 2014 Intel Corporation (Ramakrishna Pallala <[e-mail]>)
+ * Copyright (C) 2024 - 2025 Hans de Goede <[e-mail]>
+ */
+
+#include <linux/bits.h>
+#include <linux/bitfield.h>
+#include <linux/bitops.h>
+#include <linux/cleanup.h>
+#include <linux/delay.h>
+#include <linux/device.h>
+#include <linux/interrupt.h>
+#include <linux/mfd/intel_soc_pmic.h>
+#include <linux/mod_devicetable.h>
+#include <linux/module.h>
+#include <linux/mutex.h>
+#include <linux/platform_device.h>
+#include <linux/regmap.h>
+#include <linux/wait.h>
+
+#include <linux/iio/driver.h>
+#include <linux/iio/iio.h>
+#include <linux/iio/machine.h>
+
+#define DC_TI_ADC_CNTL_REG			0x50
+#define DC_TI_ADC_START				BIT(0)
+#define DC_TI_ADC_CH_SEL			GENMASK(2, 1)
+#define DC_TI_ADC_EN				BIT(5)
+#define DC_TI_ADC_EN_EXT_BPTH_BIAS		BIT(6)
+
+#define DC_TI_VBAT_ZSE_GE_REG			0x53
+#define DC_TI_VBAT_GE				GENMASK(3, 0)
+#define DC_TI_VBAT_ZSE				GENMASK(7, 4)
+
+/* VBAT GE gain correction is in 0.0015 increments, ZSE is in 1.0 increments */
+#define DC_TI_VBAT_GE_STEP			15
+#define DC_TI_VBAT_GE_DIV			10000
+
+#define DC_TI_ADC_DATA_REG_CH(x)		(0x54 + 2 * (x))
+
+enum dc_ti_adc_id {
+	DC_TI_ADC_VBAT,
+	DC_TI_ADC_PMICTEMP,
+	DC_TI_ADC_BATTEMP,
+	DC_TI_ADC_SYSTEMP0,
+};
+
+struct dc_ti_adc_info {
+	struct mutex lock; /* Protects against concurrent accesses to the ADC */
+	wait_queue_head_t wait;
+	struct device *dev;
+	struct regmap *regmap;
+	int vbat_zse;
+	int vbat_ge;
+	bool conversion_done;
+};
+
+static const struct iio_chan_spec dc_ti_adc_channels[] = {
+	{
+		.indexed = 1,
+		.type = IIO_VOLTAGE,
+		.channel = DC_TI_ADC_VBAT,
+		.address = DC_TI_ADC_DATA_REG_CH(0),
+		.datasheet_name = "CH0",
+		.info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |
+				      BIT(IIO_CHAN_INFO_SCALE) |
+				      BIT(IIO_CHAN_INFO_PROCESSED),
+	}, {
+		.indexed = 1,
+		.type = IIO_TEMP,
+		.channel = DC_TI_ADC_PMICTEMP,
+		.address = DC_TI_ADC_DATA_REG_CH(1),
+		.datasheet_name = "CH1",
+		.info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
+	}, {
+		.indexed = 1,
+		.type = IIO_TEMP,
+		.channel = DC_TI_ADC_BATTEMP,
+		.address = DC_TI_ADC_DATA_REG_CH(2),
+		.datasheet_name = "CH2",
+		.info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
+	}, {
+		.indexed = 1,
+		.type = IIO_TEMP,
+		.channel = DC_TI_ADC_SYSTEMP0,
+		.address = DC_TI_ADC_DATA_REG_CH(3),
+		.datasheet_name = "CH3",
+		.info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
+	}
+};
+
+static struct iio_map dc_ti_adc_default_maps[] = {
+	IIO_MAP("CH0", "chtdc_ti_battery", "VBAT"),
+	IIO_MAP("CH1", "chtdc_ti_battery", "PMICTEMP"),
+	IIO_MAP("CH2", "chtdc_ti_battery", "BATTEMP"),
+	IIO_MAP("CH3", "chtdc_ti_battery", "SYSTEMP0"),
+	{ }
+};
+
+static irqreturn_t dc_ti_adc_isr(int irq, void *data)
+{
+	struct dc_ti_adc_info *info = data;
+
+	info->conversion_done = true;
+	wake_up(&info->wait);
+	return IRQ_HANDLED;
+}
+
+static int dc_ti_adc_scale(struct dc_ti_adc_info *info,
+			   struct iio_chan_spec const *chan,
+			   int *val, int *val2)
+{
+	if (chan->channel != DC_TI_ADC_VBAT)
+		return -EINVAL;
+
+	/* Vbat ADC scale is 4.6875 mV / unit */
+	*val = 4;
+	*val2 = 687500;
+
+	return IIO_VAL_INT_PLUS_MICRO;
+}
+
+static int dc_ti_adc_raw_to_processed(struct dc_ti_adc_info *info,
+				      struct iio_chan_spec const *chan,
+				      int raw, int *val, int *val2)
+{
+	if (chan->channel != DC_TI_ADC_VBAT)
+		return -EINVAL;
+
+	/* Apply calibration */
+	raw -= info->vbat_zse;
+	raw = raw * (DC_TI_VBAT_GE_DIV - info->vbat_ge * DC_TI_VBAT_GE_STEP) /
+	      DC_TI_VBAT_GE_DIV;
+	/* Vbat ADC scale is 4.6875 mV / unit */
+	raw *= 46875;
+
+	/* raw is now in 10000 units / mV, convert to milli + milli/1e6 */
+	*val = raw / 10000;
+	*val2 = (raw % 10000) * 100;
+
+	return IIO_VAL_INT_PLUS_MICRO;
+}
+
+static int dc_ti_adc_sample(struct dc_ti_adc_info *info,
+			    struct iio_chan_spec const *chan, int *val)
+{
+	int ret, ch = chan->channel;
+	__be16 buf;
+
+	info->conversion_done = false;
+
+	/*
+	 * As per TI (PMIC Vendor), the ADC enable and ADC start commands should
+	 * not be sent together. Hence send the commands separately.
+	 */
+	ret = regmap_set_bits(info->regmap, DC_TI_ADC_CNTL_REG, DC_TI_ADC_EN);
+	if (ret)
+		return ret;
+
+	ret = regmap_update_bits(info->regmap, DC_TI_ADC_CNTL_REG,
+				 DC_TI_ADC_CH_SEL,
+				 FIELD_PREP(DC_TI_ADC_CH_SEL, ch));
+	if (ret)
+		return ret;
+
+	/*
+	 * As per PMIC Vendor, a minimum of 50 ųs delay is required between ADC
+	 * Enable and ADC START commands. This is also recommended by Intel
+	 * Hardware team after the timing analysis of GPADC signals. Since the
+	 * I2C Write transaction to set the channel number also imparts 25 ųs
+	 * delay, we need to wait for another 25 ųs before issuing ADC START.
+	 */
+	fsleep(25);
+
+	ret = regmap_set_bits(info->regmap, DC_TI_ADC_CNTL_REG,
+			      DC_TI_ADC_START);
+	if (ret)
+		return ret;
+
+	/* TI (PMIC Vendor) recommends 5 s timeout for conversion */
+	ret = wait_event_timeout(info->wait, info->conversion_done, 5 * HZ);
+	if (ret == 0) {
+		ret = -ETIMEDOUT;
+		goto disable_adc;
+	}
+
+	ret = regmap_bulk_read(info->regmap, chan->address, &buf, sizeof(buf));
+	if (ret)
+		goto disable_adc;
+
+	/* The ADC values are 10 bits wide */
+	*val = be16_to_cpu(buf) & GENMASK(9, 0);
+
+disable_adc:
+	regmap_clear_bits(info->regmap, DC_TI_ADC_CNTL_REG,
+			  DC_TI_ADC_START | DC_TI_ADC_EN);
+	return ret;
+}
+
+static int dc_ti_adc_read_raw(struct iio_dev *indio_dev,
+			      struct iio_chan_spec const *chan,
+			      int *val, int *val2, long mask)
+{
+	struct dc_ti_adc_info *info = iio_priv(indio_dev);
+	int ret;
+
+	if (mask == IIO_CHAN_INFO_SCALE)
+		return dc_ti_adc_scale(info, chan, val, val2);
+
+	guard(mutex)(&info->lock);
+
+	/*
+	 * If channel BPTHERM has been selected, first enable the BPTHERM BIAS
+	 * which provides the VREF Voltage reference to convert BPTHERM Input
+	 * voltage to temperature.
+	 */
+	if (chan->channel == DC_TI_ADC_BATTEMP) {
+		ret = regmap_set_bits(info->regmap, DC_TI_ADC_CNTL_REG,
+				      DC_TI_ADC_EN_EXT_BPTH_BIAS);
+		if (ret)
+			return ret;
+		/*
+		 * As per PMIC Vendor specifications, BPTHERM BIAS should be
+		 * enabled 35 ms before ADC_EN command.
+		 */
+		msleep(35);
+	}
+
+	ret = dc_ti_adc_sample(info, chan, val);
+
+	if (chan->channel == DC_TI_ADC_BATTEMP)
+		regmap_clear_bits(info->regmap, DC_TI_ADC_CNTL_REG,
+				  DC_TI_ADC_EN_EXT_BPTH_BIAS);
+
+	if (ret)
+		return ret;
+
+	switch (mask) {
+	case IIO_CHAN_INFO_RAW:
+		return IIO_VAL_INT;
+	case IIO_CHAN_INFO_PROCESSED:
+		return dc_ti_adc_raw_to_processed(info, chan, *val, val, val2);
+	}
+
+	return -EINVAL;
+}
+
+static const struct iio_info dc_ti_adc_iio_info = {
+	.read_raw = dc_ti_adc_read_raw,
+};
+
+static int dc_ti_adc_probe(struct platform_device *pdev)
+{
+	struct device *dev = &pdev->dev;
+	struct intel_soc_pmic *pmic = dev_get_drvdata(dev->parent);
+	struct dc_ti_adc_info *info;
+	struct iio_dev *indio_dev;
+	unsigned int val;
+	int irq, ret;
+
+	irq = platform_get_irq(pdev, 0);
+	if (irq < 0)
+		return irq;
+
+	indio_dev = devm_iio_device_alloc(dev, sizeof(*info));
+	if (!indio_dev)
+		return -ENOMEM;
+
+	info = iio_priv(indio_dev);
+
+	ret = devm_mutex_init(dev, &info->lock);
+	if (ret)
+		return ret;
+
+	init_waitqueue_head(&info->wait);
+
+	info->dev = dev;
+	info->regmap = pmic->regmap;
+
+	indio_dev->name = "dc_ti_adc";
+	indio_dev->channels = dc_ti_adc_channels;
+	indio_dev->num_channels = ARRAY_SIZE(dc_ti_adc_channels);
+	indio_dev->info = &dc_ti_adc_iio_info;
+	indio_dev->modes = INDIO_DIRECT_MODE;
+
+	ret = regmap_read(info->regmap, DC_TI_VBAT_ZSE_GE_REG, &val);
+	if (ret)
+		return ret;
+
+	info->vbat_zse = sign_extend32(FIELD_GET(DC_TI_VBAT_ZSE, val), 3);
+	info->vbat_ge = sign_extend32(FIELD_GET(DC_TI_VBAT_GE, val), 3);
+
+	dev_dbg(dev, "vbat-zse %d vbat-ge %d\n", info->vbat_zse, info->vbat_ge);
+
+	ret = devm_iio_map_array_register(dev, indio_dev, dc_ti_adc_default_maps);
+	if (ret)
+		return ret;
+
+	ret = devm_request_threaded_irq(dev, irq, NULL, dc_ti_adc_isr,
+					IRQF_ONESHOT, indio_dev->name, info);
+	if (ret)
+		return ret;
+
+	return devm_iio_device_register(dev, indio_dev);
+}
+
+static const struct platform_device_id dc_ti_adc_ids[] = {
+	{ .name = "chtdc_ti_adc" },
+	{ }
+};
+MODULE_DEVICE_TABLE(platform, dc_ti_adc_ids);
+
+static struct platform_driver dc_ti_adc_driver = {
+	.driver = {
+		.name	= "dc_ti_adc",
+	},
+	.probe		= dc_ti_adc_probe,
+	.id_table	= dc_ti_adc_ids,
+};
+module_platform_driver(dc_ti_adc_driver);
+
+MODULE_AUTHOR("Ramakrishna Pallala (Intel)");
+MODULE_AUTHOR("Hans de Goede <[e-mail]>");
+MODULE_DESCRIPTION("Intel Dollar Cove (TI) GPADC Driver");
+MODULE_LICENSE("GPL");

drivers/iio/adc/mcp3564.c

···
 
 	channels = devm_kcalloc(dev, num_ch, sizeof(*channels), GFP_KERNEL);
 	if (!channels)
-		return dev_err_probe(dev, -ENOMEM, "Can't allocate memory\n");
+		return -ENOMEM;
 
 	device_for_each_child_node_scoped(dev, child) {
 		node_name = fwnode_get_name(child);

drivers/iio/adc/meson_saradc.c

···
 
 	indio_dev = devm_iio_device_alloc(dev, sizeof(*priv));
 	if (!indio_dev)
-		return dev_err_probe(dev, -ENOMEM, "failed allocating iio device\n");
+		return -ENOMEM;
 
 	priv = iio_priv(indio_dev);
 	init_completion(&priv->done);

drivers/iio/adc/mt6577_auxadc.c

···
 
 	ret = devm_add_action_or_reset(&pdev->dev, mt6577_power_off, adc_dev);
 	if (ret)
-		return dev_err_probe(&pdev->dev, ret,
-				     "Failed to add action to managed power off\n");
+		return ret;
 
 	ret = devm_iio_device_register(&pdev->dev, indio_dev);
 	if (ret < 0)

drivers/iio/adc/mxs-lradc-adc.c

···
 
 	/* Allocate the IIO device. */
 	iio = devm_iio_device_alloc(dev, sizeof(*adc));
-	if (!iio) {
-		dev_err(dev, "Failed to allocate IIO device\n");
+	if (!iio)
 		return -ENOMEM;
-	}
 
 	adc = iio_priv(iio);
 	adc->lradc = lradc;

drivers/iio/adc/pac1921.c

···
 	ret = devm_add_action_or_reset(dev, pac1921_regulator_disable,
 				       priv->vdd);
 	if (ret)
-		return dev_err_probe(dev, ret,
-			"Cannot add action for vdd regulator disposal\n");
+		return ret;
 
 	msleep(PAC1921_POWERUP_TIME_MS);
 

drivers/iio/adc/pac1934.c

···
 	return 0;
 }
 
-static void pac1934_mutex_destroy(void *data)
-{
-	struct mutex *lock = data;
-
-	mutex_destroy(lock);
-}
-
 static const struct iio_info pac1934_info = {
 	.read_raw = pac1934_read_raw,
 	.write_raw = pac1934_write_raw,
···
 		return dev_err_probe(dev, ret,
 				     "parameter parsing returned an error\n");
 
-	mutex_init(&info->lock);
-	ret = devm_add_action_or_reset(dev, pac1934_mutex_destroy,
-				       &info->lock);
+	ret = devm_mutex_init(dev, &info->lock);
 	if (ret < 0)
 		return ret;
 

drivers/iio/adc/palmas_gpadc.c

···
 		return -EINVAL;
 
 	indio_dev = devm_iio_device_alloc(&pdev->dev, sizeof(*adc));
-	if (!indio_dev) {
-		dev_err(&pdev->dev, "iio_device_alloc failed\n");
+	if (!indio_dev)
 		return -ENOMEM;
-	}
 
 	adc = iio_priv(indio_dev);
 	adc->dev = &pdev->dev;

drivers/iio/adc/rcar-gyroadc.c

···
 {
 	struct device *dev = priv->dev;
 
-	if (on) {
+	if (on)
 		return pm_runtime_resume_and_get(dev);
-	} else {
-		pm_runtime_mark_last_busy(dev);
-		return pm_runtime_put_autosuspend(dev);
-	}
+
+	return pm_runtime_put_autosuspend(dev);
 }
 
 static int rcar_gyroadc_read_raw(struct iio_dev *indio_dev,

drivers/iio/adc/rn5t618-adc.c

···
 	struct rn5t618 *rn5t618 = dev_get_drvdata(pdev->dev.parent);
 
 	iio_dev = devm_iio_device_alloc(&pdev->dev, sizeof(*adc));
-	if (!iio_dev) {
-		dev_err(&pdev->dev, "failed allocating iio device\n");
+	if (!iio_dev)
 		return -ENOMEM;
-	}
 
 	adc = iio_priv(iio_dev);
 	adc->dev = &pdev->dev;

drivers/iio/adc/rockchip_saradc.c

···
 
 	indio_dev = devm_iio_device_alloc(&pdev->dev, sizeof(*info));
 	if (!indio_dev)
-		return dev_err_probe(&pdev->dev, -ENOMEM,
-				     "failed allocating iio device\n");
+		return -ENOMEM;
 
 	info = iio_priv(indio_dev);
 
···
 	ret = devm_add_action_or_reset(&pdev->dev,
 				       rockchip_saradc_regulator_disable, info);
 	if (ret)
-		return dev_err_probe(&pdev->dev, ret,
-				     "failed to register devm action\n");
+		return ret;
 
 	ret = regulator_get_voltage(info->vref);
 	if (ret < 0)

drivers/iio/adc/rohm-bd79112.c

···
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * ROHM ADC driver for BD79112 signal monitoring hub.
+ * Copyright (C) 2025, ROHM Semiconductor.
+ *
+ * SPI communication derived from ad7923.c and ti-ads7950.c
+ */
+
+#include <linux/array_size.h>
+#include <linux/bitfield.h>
+#include <linux/bitops.h>
+#include <linux/bits.h>
+#include <linux/dev_printk.h>
+#include <linux/err.h>
+#include <linux/errno.h>
+#include <linux/gpio/driver.h>
+#include <linux/mod_devicetable.h>
+#include <linux/module.h>
+#include <linux/regmap.h>
+#include <linux/regulator/consumer.h>
+#include <linux/spi/spi.h>
+#include <linux/types.h>
+#include <asm/byteorder.h>
+
+#include <linux/iio/adc-helpers.h>
+#include <linux/iio/iio.h>
+
+#define BD79112_MAX_NUM_CHANNELS 32
+
+struct bd79112_data {
+	struct spi_device *spi;
+	struct regmap *map;
+	struct device *dev;
+	struct gpio_chip gc;
+	unsigned long gpio_valid_mask;
+	unsigned int vref_mv;
+	struct spi_transfer read_xfer[2];
+	struct spi_transfer write_xfer;
+	struct spi_message read_msg;
+	struct spi_message write_msg;
+	/* 16-bit TX, valid data in high byte */
+	u8 read_tx[2] __aligned(IIO_DMA_MINALIGN);
+	/* 8-bit address followed by 8-bit data */
+	u8 reg_write_tx[2];
+	/* 12-bit of ADC data or 8 bit of reg data */
+	__be16 read_rx;
+};
+
+/*
+ * The ADC data is read issuing SPI-command matching the channel number.
+ * We treat this as a register address.
+ */
+#define BD79112_REG_AGIO0A		0x00
+#define BD79112_REG_AGIO15B		0x1f
+
+/*
+ * ADC STATUS_FLAG appended to ADC data will be set, if the ADC result is being
+ * read for a channel, which input pin is muxed to be a GPIO.
+ */
+#define BD79112_ADC_STATUS_FLAG BIT(14)
+
+/*
+ * The BD79112 requires "R/W bit" to be set for SPI register (not ADC data)
+ * reads and an "IOSET bit" to be set for read/write operations (which aren't
+ * reading the ADC data).
+ */
+#define BD79112_BIT_RW			BIT(4)
+#define BD79112_BIT_IO			BIT(5)
+
+#define BD79112_REG_GPI_VALUE_B8_15	(BD79112_BIT_IO | 0x0)
+#define BD79112_REG_GPI_VALUE_B0_B7	(BD79112_BIT_IO | 0x1)
+#define BD79112_REG_GPI_VALUE_A8_15	(BD79112_BIT_IO | 0x2)
+#define BD79112_REG_GPI_VALUE_A0_A7	(BD79112_BIT_IO | 0x3)
+
+#define BD79112_REG_GPI_EN_B7_B15	(BD79112_BIT_IO | 0x4)
+#define BD79112_REG_GPI_EN_B0_B7	(BD79112_BIT_IO | 0x5)
+#define BD79112_REG_GPI_EN_A8_A15	(BD79112_BIT_IO | 0x6)
+#define BD79112_REG_GPI_EN_A0_A7	(BD79112_BIT_IO | 0x7)
+
+#define BD79112_REG_GPO_EN_B7_B15	(BD79112_BIT_IO | 0x8)
+#define BD79112_REG_GPO_EN_B0_B7	(BD79112_BIT_IO | 0x9)
+#define BD79112_REG_GPO_EN_A8_A15	(BD79112_BIT_IO | 0xa)
+#define BD79112_REG_GPO_EN_A0_A7	(BD79112_BIT_IO | 0xb)
+
+#define BD79112_NUM_GPIO_EN_REGS	8
+#define BD79112_FIRST_GPIO_EN_REG	BD79112_REG_GPI_EN_B7_B15
+
+#define BD79112_REG_GPO_VALUE_B8_15	(BD79112_BIT_IO | 0xc)
+#define BD79112_REG_GPO_VALUE_B0_B7	(BD79112_BIT_IO | 0xd)
+#define BD79112_REG_GPO_VALUE_A8_15	(BD79112_BIT_IO | 0xe)
+#define BD79112_REG_GPO_VALUE_A0_A7	(BD79112_BIT_IO | 0xf)
+
+#define BD79112_REG_MAX BD79112_REG_GPO_VALUE_A0_A7
+
+/*
+ * Read transaction consists of two 16-bit sequences separated by CSB.
+ * For register read, 'IOSET' bit must be set. For ADC read, IOSET is cleared
+ * and ADDR equals the channel number (0 ... 31).
+ *
+ * First 16-bit sequence, MOSI as below, MISO data ignored:
+ * - SCK: | 1 | 2 |   3   |    4   | 5 .. 8 | 9 .. 16 |
+ * - MOSI:| 0 | 0 | IOSET | RW (1) |  ADDR  |  8'b0   |
+ *
+ * CSB released and re-acquired between these sequences
+ *
+ * Second 16-bit sequence, MISO as below, MOSI data ignored:
+ *   For Register read data is 8 bits:
+ *   - SCK: | 1 .. 8 |   9 .. 16   |
+ *   - MISO:|  8'b0  | 8-bit data  |
+ *
+ *   For ADC read data is 12 bits:
+ *   - SCK: | 1 |      2      | 3  4 |   4 .. 16   |
+ *   - MISO:| 0 | STATUS_FLAG | 2'b0 | 12-bit data |
+ *     The 'STATUS_FLAG' is set if the read input pin was configured as a GPIO.
+ */
+static int bd79112_reg_read(void *context, unsigned int reg, unsigned int *val)
+{
+	struct bd79112_data *data = context;
+	int ret;
+
+	if (reg & BD79112_BIT_IO)
+		reg |= BD79112_BIT_RW;
+
+	data->read_tx[0] = reg;
+
+	ret = spi_sync(data->spi, &data->read_msg);
+	if (!ret)
+		*val = be16_to_cpu(data->read_rx);
+
+	return ret;
+}
+
+/*
+ * Write, single 16-bit sequence (broken down below):
+ *
+ * First 8-bit, MOSI as below, MISO data ignored:
+ * - SCK: | 1 | 2 | 3   | 4     | 5 .. 8 |
+ * - MOSI:| 0 | 0 |IOSET| RW(0) | ADDR   |
+ *
+ * Last 8 SCK cycles (b8 ... b15), MISO contains register data, MOSI ignored.
+ * - SCK: | 9 .. 16 |
+ * - MISO:|  data   |
+ */
+static int bd79112_reg_write(void *context, unsigned int reg, unsigned int val)
+{
+	struct bd79112_data *data = context;
+
+	data->reg_write_tx[0] = reg;
+	data->reg_write_tx[1] = val;
+
+	return spi_sync(data->spi, &data->write_msg);
+}
+
+static int _get_gpio_reg(unsigned int offset, unsigned int base)
+{
+	int regoffset = offset / 8;
+
+	if (offset > 31)
+		return -EINVAL;
+
+	return base - regoffset;
+}
+
+#define GET_GPIO_BIT(offset) BIT((offset) % 8)
+#define GET_GPO_EN_REG(offset)  _get_gpio_reg((offset), BD79112_REG_GPO_EN_A0_A7)
+#define GET_GPI_EN_REG(offset)  _get_gpio_reg((offset), BD79112_REG_GPI_EN_A0_A7)
+#define GET_GPO_VAL_REG(offset)  _get_gpio_reg((offset), BD79112_REG_GPO_VALUE_A0_A7)
+#define GET_GPI_VAL_REG(offset)  _get_gpio_reg((offset), BD79112_REG_GPI_VALUE_A0_A7)
+
+static const struct regmap_range bd71815_volatile_ro_ranges[] = {
+	{
+		/* Read ADC data */
+		.range_min = BD79112_REG_AGIO0A,
+		.range_max = BD79112_REG_AGIO15B,
+	}, {
+		/* GPI state */
+		.range_min = BD79112_REG_GPI_VALUE_B8_15,
+		.range_max = BD79112_REG_GPI_VALUE_A0_A7,
+	},
+};
+
+static const struct regmap_access_table bd79112_volatile_regs = {
+	.yes_ranges = &bd71815_volatile_ro_ranges[0],
+	.n_yes_ranges = ARRAY_SIZE(bd71815_volatile_ro_ranges),
+};
+
+static const struct regmap_access_table bd79112_ro_regs = {
+	.no_ranges = &bd71815_volatile_ro_ranges[0],
+	.n_no_ranges = ARRAY_SIZE(bd71815_volatile_ro_ranges),
+};
+
+static const struct regmap_config bd79112_regmap = {
+	.reg_read = bd79112_reg_read,
+	.reg_write = bd79112_reg_write,
+	.volatile_table = &bd79112_volatile_regs,
+	.wr_table = &bd79112_ro_regs,
+	.cache_type = REGCACHE_MAPLE,
+	.max_register = BD79112_REG_MAX,
+};
+
+static int bd79112_read_raw(struct iio_dev *indio_dev,
+			    struct iio_chan_spec const *chan, int *val,
+			    int *val2, long m)
+{
+	struct bd79112_data *data = iio_priv(indio_dev);
+	int ret;
+
+	switch (m) {
+	case IIO_CHAN_INFO_RAW:
+		ret = regmap_read(data->map, chan->channel, val);
+		if (ret < 0)
+			return ret;
+
+		return IIO_VAL_INT;
+
+	case IIO_CHAN_INFO_SCALE:
+		*val = data->vref_mv;
+		*val2 = 12;
+
+		return IIO_VAL_FRACTIONAL_LOG2;
+	default:
+		return -EINVAL;
+	}
+}
+
+static const struct iio_info bd79112_info = {
+	.read_raw = bd79112_read_raw,
+};
+
+static const struct iio_chan_spec bd79112_chan_template = {
+	.type = IIO_VOLTAGE,
+	.info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
+	.info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE),
+	.indexed = 1,
+};
+
+static int bd79112_gpio_init_valid_mask(struct gpio_chip *gc,
+					unsigned long *valid_mask,
+					unsigned int ngpios)
+{
+	struct bd79112_data *data = gpiochip_get_data(gc);
+
+	*valid_mask = data->gpio_valid_mask;
+
+	return 0;
+}
+
+static int bd79112_gpio_dir_get(struct gpio_chip *gc, unsigned int offset)
+{
+	struct bd79112_data *data = gpiochip_get_data(gc);
+	unsigned int reg, bit, val;
+	int ret;
+
+	bit = GET_GPIO_BIT(offset);
+	reg = GET_GPO_EN_REG(offset);
+
+	ret = regmap_read(data->map, reg, &val);
+	if (ret)
+		return ret;
+
+	if (bit & val)
+		return GPIO_LINE_DIRECTION_OUT;
+
+	reg = GET_GPI_EN_REG(offset);
+	ret = regmap_read(data->map, reg, &val);
+	if (ret)
+		return ret;
+
+	if (bit & val)
+		return GPIO_LINE_DIRECTION_IN;
+
+	/*
+	 * Ouch. Seems the pin is ADC input - shouldn't happen as changing mux
+	 * at runtime is not supported and non GPIO pins should be invalidated
+	 * by the valid_mask at probe. Maybe someone wrote a register bypassing
+	 * the driver?
+	 */
+	dev_err(data->dev, "Pin not a GPIO\n");
+
+	return -EINVAL;
+}
+
+static int bd79112_gpio_get(struct gpio_chip *gc, unsigned int offset)
+{
+	struct bd79112_data *data = gpiochip_get_data(gc);
+	unsigned int reg, bit, val;
+	int ret;
+
+	bit = GET_GPIO_BIT(offset);
+	reg = GET_GPI_VAL_REG(offset);
+
+	ret = regmap_read(data->map, reg, &val);
+	if (ret)
+		return ret;
+
+	return !!(val & bit);
+}
+
+static int bd79112_gpio_set(struct gpio_chip *gc, unsigned int offset,
+			    int value)
+{
+	struct bd79112_data *data = gpiochip_get_data(gc);
+	unsigned int reg, bit;
+
+	bit = GET_GPIO_BIT(offset);
+	reg = GET_GPO_VAL_REG(offset);
+
+	return regmap_assign_bits(data->map, reg, bit, value);
+}
+
+static int bd79112_gpio_set_multiple(struct gpio_chip *gc, unsigned long *mask,
+				     unsigned long *bits)
+{
+	struct bd79112_data *data = gpiochip_get_data(gc);
+	unsigned long i, bank_mask;
+
+	for_each_set_clump8(i, bank_mask, mask, gc->ngpio) {
+		unsigned long bank_bits;
+		unsigned int reg;
+		int ret;
+
+		bank_bits = bitmap_get_value8(bits, i);
+		reg = BD79112_REG_GPO_VALUE_A0_A7 - i / 8;
+		ret = regmap_update_bits(data->map, reg, bank_mask, bank_bits);
+		if (ret)
+			return ret;
+	}
+
+	return 0;
+}
+
+static int bd79112_gpio_dir_set(struct bd79112_data *data, unsigned int offset,
+				int dir)
+{
+	unsigned int gpi_reg, gpo_reg, bit;
+	int ret;
+
+	bit = GET_GPIO_BIT(offset);
+	gpi_reg = GET_GPI_EN_REG(offset);
+	gpo_reg =  GET_GPO_EN_REG(offset);
+
+	if (dir == GPIO_LINE_DIRECTION_OUT) {
+		ret = regmap_clear_bits(data->map, gpi_reg, bit);
+		if (ret)
+			return ret;
+
+		return regmap_set_bits(data->map, gpo_reg, bit);
+	}
+
+	ret = regmap_set_bits(data->map, gpi_reg, bit);
+	if (ret)
+		return ret;
+
+	return regmap_clear_bits(data->map, gpo_reg, bit);
+}
+
+static int bd79112_gpio_input(struct gpio_chip *gc, unsigned int offset)
+{
+	struct bd79112_data *data = gpiochip_get_data(gc);
+
+	return bd79112_gpio_dir_set(data, offset, GPIO_LINE_DIRECTION_IN);
+}
+
+static int bd79112_gpio_output(struct gpio_chip *gc, unsigned int offset,
+			       int value)
+{
+	struct bd79112_data *data = gpiochip_get_data(gc);
+	int ret;
+
+	ret = bd79112_gpio_set(gc, offset, value);
+	if (ret)
+		return ret;
+
+	return bd79112_gpio_dir_set(data, offset, GPIO_LINE_DIRECTION_OUT);
+}
+
+static const struct gpio_chip bd79112_gpio_chip = {
+	.label			= "bd79112-gpio",
+	.get_direction		= bd79112_gpio_dir_get,
+	.direction_input	= bd79112_gpio_input,
+	.direction_output	= bd79112_gpio_output,
+	.get			= bd79112_gpio_get,
+	.set			= bd79112_gpio_set,
+	.set_multiple		= bd79112_gpio_set_multiple,
+	.init_valid_mask	= bd79112_gpio_init_valid_mask,
+	.can_sleep		= true,
+	.ngpio			= 32,
+	.base			= -1,
+};
+
+static unsigned int bd79112_get_gpio_pins(const struct iio_chan_spec *cs, int num_channels)
+{
+	unsigned int i, gpio_channels;
+
+	/*
+	 * Let's initialize the mux config to say that all 32 channels are
+	 * GPIOs. Then we can just loop through the iio_chan_spec and clear the
+	 * bits for found ADC channels.
+	 */
+	gpio_channels = GENMASK(31, 0);
+	for (i = 0; i < num_channels; i++)
+		gpio_channels &= ~BIT(cs[i].channel);
+
+	return gpio_channels;
+}
+
+/* ADC channels as named in the data-sheet */
+static const char * const bd79112_chan_names[] = {
+	"AGIO0A", "AGIO1A", "AGIO2A", "AGIO3A",		/* 0 - 3 */
+	"AGIO4A", "AGIO5A", "AGIO6A", "AGIO7A",		/* 4 - 7 */
+	"AGIO8A", "AGIO9A", "AGIO10A", "AGIO11A",	/* 8 - 11 */
+	"AGIO12A", "AGIO13A", "AGIO14A", "AGIO15A",	/* 12 - 15 */
+	"AGIO0B", "AGIO1B", "AGIO2B", "AGIO3B",		/* 16 - 19 */
+	"AGIO4B", "AGIO5B", "AGIO6B", "AGIO7B",		/* 20 - 23 */
+	"AGIO8B", "AGIO9B", "AGIO10B", "AGIO11B",	/* 24 - 27 */
+	"AGIO12B", "AGIO13B", "AGIO14B", "AGIO15B",	/* 28 - 31 */
+};
+
+static int bd79112_probe(struct spi_device *spi)
+{
+	struct bd79112_data *data;
+	struct iio_dev *iio_dev;
+	struct iio_chan_spec *cs;
+	struct device *dev = &spi->dev;
+	unsigned long gpio_pins, pin;
+	unsigned int i;
+	int ret;
+
+	iio_dev = devm_iio_device_alloc(dev, sizeof(*data));
+	if (!iio_dev)
+		return -ENOMEM;
+
+	data = iio_priv(iio_dev);
+	data->spi = spi;
+	data->dev = dev;
+	data->map = devm_regmap_init(dev, NULL, data, &bd79112_regmap);
+	if (IS_ERR(data->map))
+		return dev_err_probe(dev, PTR_ERR(data->map),
+				     "Failed to initialize Regmap\n");
+
+	ret = devm_regulator_get_enable_read_voltage(dev, "vdd");
+	if (ret < 0)
+		return dev_err_probe(dev, ret, "Failed to get the Vdd\n");
+
+	data->vref_mv = ret / 1000;
+
+	ret = devm_regulator_get_enable(dev, "iovdd");
+	if (ret < 0)
+		return dev_err_probe(dev, ret, "Failed to enable I/O voltage\n");
+
+	data->read_xfer[0].tx_buf = &data->read_tx[0];
+	data->read_xfer[0].len = sizeof(data->read_tx);
+	data->read_xfer[0].cs_change = 1;
+	data->read_xfer[1].rx_buf = &data->read_rx;
+	data->read_xfer[1].len = sizeof(data->read_rx);
+	spi_message_init_with_transfers(&data->read_msg, data->read_xfer, 2);
+	ret = devm_spi_optimize_message(dev, spi, &data->read_msg);
+	if (ret < 0)
+		return dev_err_probe(dev, ret,
+				     "Failed to optimize SPI read message\n");
+
+	data->write_xfer.tx_buf = &data->reg_write_tx[0];
+	data->write_xfer.len = sizeof(data->reg_write_tx);
+	spi_message_init_with_transfers(&data->write_msg, &data->write_xfer, 1);
+	ret = devm_spi_optimize_message(dev, spi, &data->write_msg);
+	if (ret < 0)
+		return dev_err_probe(dev, ret,
+				     "Failed to optimize SPI write message\n");
+
+	ret = devm_iio_adc_device_alloc_chaninfo_se(dev, &bd79112_chan_template,
+						    BD79112_MAX_NUM_CHANNELS - 1,
+						    &cs);
+
+	/* Register all pins as GPIOs if there are no ADC channels */
+	if (ret == -ENOENT)
+		goto register_gpios;
+
+	if (ret < 0)
+		return ret;
+
+	iio_dev->num_channels = ret;
+	iio_dev->channels = cs;
+
+	for (i = 0; i < iio_dev->num_channels; i++)
+		cs[i].datasheet_name = bd79112_chan_names[cs[i].channel];
+
+	iio_dev->info = &bd79112_info;
+	iio_dev->name = "bd79112";
+	iio_dev->modes = INDIO_DIRECT_MODE;
+
+	/*
+	 * Ensure all channels are ADCs. This allows us to register the IIO
+	 * device early (before checking which pins are to be used for GPIO)
+	 * without having to worry about some pins being initially used for
+	 * GPIO.
+	 */
+	for (i = 0; i < BD79112_NUM_GPIO_EN_REGS; i++) {
+		ret = regmap_write(data->map, BD79112_FIRST_GPIO_EN_REG + i, 0);
+		if (ret)
+			return dev_err_probe(dev, ret,
+					     "Failed to initialize channels\n");
+	}
+
+	ret = devm_iio_device_register(data->dev, iio_dev);
+	if (ret)
+		return dev_err_probe(data->dev, ret, "Failed to register ADC\n");
+
+register_gpios:
+	gpio_pins = bd79112_get_gpio_pins(iio_dev->channels,
+					  iio_dev->num_channels);
+
+	/* If all channels are reserved for ADC, then we're done. */
+	if (!gpio_pins)
+		return 0;
+
+	/* Default all the GPIO pins to GPI */
+	for_each_set_bit(pin, &gpio_pins, BD79112_MAX_NUM_CHANNELS) {
+		ret = bd79112_gpio_dir_set(data, pin, GPIO_LINE_DIRECTION_IN);
+		if (ret)
+			return dev_err_probe(dev, ret,
+					     "Failed to mark pin as GPI\n");
+	}
+
+	data->gpio_valid_mask = gpio_pins;
+	data->gc = bd79112_gpio_chip;
+	data->gc.parent = dev;
+
+	return devm_gpiochip_add_data(dev, &data->gc, data);
+}
+
+static const struct of_device_id bd79112_of_match[] = {
+	{ .compatible = "rohm,bd79112" },
+	{ }
+};
+MODULE_DEVICE_TABLE(of, bd79112_of_match);
+
+static const struct spi_device_id bd79112_id[] = {
+	{ "bd79112" },
+	{ }
+};
+MODULE_DEVICE_TABLE(spi, bd79112_id);
+
+static struct spi_driver bd79112_driver = {
+	.driver = {
+		.name = "bd79112",
+		.of_match_table = bd79112_of_match,
+	},
+	.probe = bd79112_probe,
+	.id_table = bd79112_id,
+};
+module_spi_driver(bd79112_driver);
+
+MODULE_AUTHOR("Matti Vaittinen <[e-mail]>");
+MODULE_DESCRIPTION("Driver for ROHM BD79112 ADC/GPIO");
+MODULE_LICENSE("GPL");
+MODULE_IMPORT_NS("IIO_DRIVER");

drivers/iio/adc/rzg2l_adc.c

···
 	rzg2l_adc_start_stop(adc, false);
 
 rpm_put:
-	pm_runtime_mark_last_busy(dev);
 	pm_runtime_put_autosuspend(dev);
 	return ret;
 }
···
 	rzg2l_adc_writel(adc, RZG2L_ADM(3), reg);
 
 exit_hw_init:
-	pm_runtime_mark_last_busy(dev);
 	pm_runtime_put_autosuspend(dev);
 	return ret;
 }

drivers/iio/adc/spear_adc.c

···
 #include <linux/kernel.h>
 #include <linux/slab.h>
 #include <linux/io.h>
+#include <linux/bitfield.h>
 #include <linux/clk.h>
 #include <linux/err.h>
 #include <linux/completion.h>
···
 
 /* Bit definitions for SPEAR_ADC_STATUS */
 #define SPEAR_ADC_STATUS_START_CONVERSION	BIT(0)
-#define SPEAR_ADC_STATUS_CHANNEL_NUM(x)		((x) << 1)
+#define SPEAR_ADC_STATUS_CHANNEL_NUM_MASK	GENMASK(3, 1)
 #define SPEAR_ADC_STATUS_ADC_ENABLE		BIT(4)
-#define SPEAR_ADC_STATUS_AVG_SAMPLE(x)		((x) << 5)
+#define SPEAR_ADC_STATUS_AVG_SAMPLE_MASK	GENMASK(8, 5)
 #define SPEAR_ADC_STATUS_VREF_INTERNAL		BIT(9)
 
 #define SPEAR_ADC_DATA_MASK		0x03ff
···
 	case IIO_CHAN_INFO_RAW:
 		mutex_lock(&st->lock);
 
-		status = SPEAR_ADC_STATUS_CHANNEL_NUM(chan->channel) |
-			SPEAR_ADC_STATUS_AVG_SAMPLE(st->avg_samples) |
+		status = FIELD_PREP(SPEAR_ADC_STATUS_CHANNEL_NUM_MASK, chan->channel) |
+			FIELD_PREP(SPEAR_ADC_STATUS_AVG_SAMPLE_MASK, st->avg_samples) |
 			SPEAR_ADC_STATUS_START_CONVERSION |
 			SPEAR_ADC_STATUS_ADC_ENABLE;
 		if (st->vref_external == 0)
···
 
 	indio_dev = devm_iio_device_alloc(dev, sizeof(struct spear_adc_state));
 	if (!indio_dev)
-		return dev_err_probe(dev, -ENOMEM,
-				     "failed allocating iio device\n");
+		return -ENOMEM;
 
 	st = iio_priv(indio_dev);
 	st->dev = dev;

drivers/iio/adc/stm32-adc-core.c

···
 		goto err_irq_remove;
 	}
 
-	pm_runtime_mark_last_busy(dev);
 	pm_runtime_put_autosuspend(dev);
 
 	return 0;

drivers/iio/adc/stm32-adc.c

···
 
 	stm32_adc_conv_irq_disable(adc);
 
-	pm_runtime_mark_last_busy(dev);
 	pm_runtime_put_autosuspend(dev);
 
 	return ret;
···
 
 		adc->cfg->set_ovs(indio_dev, idx);
 
-		pm_runtime_mark_last_busy(dev);
 		pm_runtime_put_autosuspend(dev);
 
 		adc->ovs_idx = idx;
···
 	adc->num_conv = bitmap_weight(scan_mask, iio_get_masklength(indio_dev));
 
 	ret = stm32_adc_conf_scan_seq(indio_dev, scan_mask);
-	pm_runtime_mark_last_busy(dev);
 	pm_runtime_put_autosuspend(dev);
 
 	return ret;
···
 	else
 		*readval = stm32_adc_readl(adc, reg);
 
-	pm_runtime_mark_last_busy(dev);
 	pm_runtime_put_autosuspend(dev);
 
 	return 0;
···
 err_clr_trig:
 	stm32_adc_set_trig(indio_dev, NULL);
 err_pm_put:
-	pm_runtime_mark_last_busy(dev);
 	pm_runtime_put_autosuspend(dev);
 
 	return ret;
···
 	if (stm32_adc_set_trig(indio_dev, NULL))
 		dev_err(&indio_dev->dev, "Can't clear trigger\n");
 
-	pm_runtime_mark_last_busy(dev);
 	pm_runtime_put_autosuspend(dev);
 
 	return 0;
···
 		goto err_hw_stop;
 	}
 
-	pm_runtime_mark_last_busy(dev);
 	pm_runtime_put_autosuspend(dev);
 
 	if (IS_ENABLED(CONFIG_DEBUG_FS))

drivers/iio/adc/stm32-dfsdm-adc.c

···
 
 	dev_data = of_device_get_match_data(dev);
 	iio = devm_iio_device_alloc(dev, sizeof(*adc));
-	if (!iio) {
-		dev_err(dev, "%s: Failed to allocate IIO\n", __func__);
+	if (!iio)
 		return -ENOMEM;
-	}
 
 	adc = iio_priv(iio);
 	adc->dfsdm = dev_get_drvdata(dev->parent);

drivers/iio/adc/stmpe-adc.c

···
 		return irq_adc;
 
 	indio_dev = devm_iio_device_alloc(&pdev->dev, sizeof(struct stmpe_adc));
-	if (!indio_dev) {
-		dev_err(&pdev->dev, "failed allocating iio device\n");
+	if (!indio_dev)
 		return -ENOMEM;
-	}
 
 	info = iio_priv(indio_dev);
 	mutex_init(&info->lock);

drivers/iio/adc/sun4i-gpadc-iio.c

···
 	.reg_bits = 32,
 	.val_bits = 32,
 	.reg_stride = 4,
-	.fast_io = true,
 };
 
 static int sun4i_prepare_for_irq(struct iio_dev *indio_dev, int channel,
···
 		*val = info->temp_data;
 
 	ret = 0;
-	pm_runtime_mark_last_busy(indio_dev->dev.parent);
 
 err:
 	pm_runtime_put_autosuspend(indio_dev->dev.parent);
···
 
 		regmap_read(info->regmap, SUN4I_GPADC_TEMP_DATA, val);
 
-		pm_runtime_mark_last_busy(indio_dev->dev.parent);
 		pm_runtime_put_autosuspend(indio_dev->dev.parent);
 
 		return 0;

drivers/iio/adc/ti-adc081c.c

···
 	int bits;
 };
 
-#define ADCxx1C_MODEL(_name, _bits)					\
-	{								\
-		.channels = _name ## _channels,				\
-		.bits = (_bits),					\
-	}
-
 DEFINE_ADCxx1C_CHANNELS(adc081c,  8);
 DEFINE_ADCxx1C_CHANNELS(adc101c, 10);
 DEFINE_ADCxx1C_CHANNELS(adc121c, 12);
 
-/* Model ids are indexes in _models array */
-enum adcxx1c_model_id {
-	ADC081C = 0,
-	ADC101C = 1,
-	ADC121C = 2,
+static const struct adcxx1c_model adc081c_model = {
+	.channels = adc081c_channels,
+	.bits = 8,
 };
 
-static struct adcxx1c_model adcxx1c_models[] = {
-	ADCxx1C_MODEL(adc081c,  8),
-	ADCxx1C_MODEL(adc101c, 10),
-	ADCxx1C_MODEL(adc121c, 12),
+static const struct adcxx1c_model adc101c_model = {
+	.channels = adc101c_channels,
+	.bits = 10,
+};
+
+static const struct adcxx1c_model adc121c_model = {
+	.channels = adc121c_channels,
+	.bits = 12,
 };
 
 static const struct iio_info adc081c_info = {
···
 }
 
 static const struct i2c_device_id adc081c_id[] = {
-	{ "adc081c", (kernel_ulong_t)&adcxx1c_models[ADC081C] },
-	{ "adc101c", (kernel_ulong_t)&adcxx1c_models[ADC101C] },
-	{ "adc121c", (kernel_ulong_t)&adcxx1c_models[ADC121C] },
+	{ "adc081c", (kernel_ulong_t)&adc081c_model },
+	{ "adc101c", (kernel_ulong_t)&adc101c_model },
+	{ "adc121c", (kernel_ulong_t)&adc121c_model },
 	{ }
 };
 MODULE_DEVICE_TABLE(i2c, adc081c_id);
 
 static const struct acpi_device_id adc081c_acpi_match[] = {
 	/* Used on some AAEON boards */
-	{ "ADC081C", (kernel_ulong_t)&adcxx1c_models[ADC081C] },
+	{ "ADC081C", (kernel_ulong_t)&adc081c_model },
 	{ }
 };
 MODULE_DEVICE_TABLE(acpi, adc081c_acpi_match);
 
 static const struct of_device_id adc081c_of_match[] = {
-	{ .compatible = "ti,adc081c", .data = &adcxx1c_models[ADC081C] },
-	{ .compatible = "ti,adc101c", .data = &adcxx1c_models[ADC101C] },
-	{ .compatible = "ti,adc121c", .data = &adcxx1c_models[ADC121C] },
+	{ .compatible = "ti,adc081c", .data = &adc081c_model },
+	{ .compatible = "ti,adc101c", .data = &adc101c_model },
+	{ .compatible = "ti,adc121c", .data = &adc121c_model },
 	{ }
 };
 MODULE_DEVICE_TABLE(of, adc081c_of_match);

drivers/iio/adc/ti-adc084s021.c

···
 	int ret;
 
 	indio_dev = devm_iio_device_alloc(&spi->dev, sizeof(*adc));
-	if (!indio_dev) {
-		dev_err(&spi->dev, "Failed to allocate IIO device\n");
+	if (!indio_dev)
 		return -ENOMEM;
-	}
 
 	adc = iio_priv(indio_dev);
 	adc->spi = spi;

drivers/iio/adc/ti-adc12138.c

···
 struct adc12138 {
 	struct spi_device *spi;
 	unsigned int id;
-	/* conversion clock */
-	struct clk *cclk;
 	/* positive analog voltage reference */
 	struct regulator *vref_p;
 	/* negative analog voltage reference */
 	struct regulator *vref_n;
 	struct mutex lock;
 	struct completion complete;
-	/* The number of cclk periods for the S/H's acquisition time */
+	/* The number of conversion clock periods for the S/H's acquisition time */
 	unsigned int acquisition_time;
 	/*
 	 * Maximum size needed: 16x 2 bytes ADC data + 8 bytes timestamp.
···
 {
 	struct iio_dev *indio_dev;
 	struct adc12138 *adc;
+	struct clk *cclk;
 	int ret;
 
 	indio_dev = devm_iio_device_alloc(&spi->dev, sizeof(*adc));
···
 	if (ret)
 		adc->acquisition_time = 10;
 
-	adc->cclk = devm_clk_get(&spi->dev, NULL);
-	if (IS_ERR(adc->cclk))
-		return PTR_ERR(adc->cclk);
+	ret = devm_request_irq(&spi->dev, spi->irq, adc12138_eoc_handler,
+			       IRQF_TRIGGER_RISING, indio_dev->name, indio_dev);
+	if (ret)
+		return ret;
+
+	cclk = devm_clk_get_enabled(&spi->dev, NULL);
+	if (IS_ERR(cclk))
+		return PTR_ERR(cclk);
 
 	adc->vref_p = devm_regulator_get(&spi->dev, "vref-p");
 	if (IS_ERR(adc->vref_p))
···
 			return ret;
 	}
 
-	ret = devm_request_irq(&spi->dev, spi->irq, adc12138_eoc_handler,
-			       IRQF_TRIGGER_RISING, indio_dev->name, indio_dev);
-	if (ret)
-		return ret;
-
-	ret = clk_prepare_enable(adc->cclk);
-	if (ret)
-		return ret;
-
 	ret = regulator_enable(adc->vref_p);
 	if (ret)
-		goto err_clk_disable;
+		return ret;
 
 	if (!IS_ERR(adc->vref_n)) {
 		ret = regulator_enable(adc->vref_n);
···
 		regulator_disable(adc->vref_n);
 err_vref_p_disable:
 	regulator_disable(adc->vref_p);
-err_clk_disable:
-	clk_disable_unprepare(adc->cclk);
 
 	return ret;
 }
···
 	if (!IS_ERR(adc->vref_n))
 		regulator_disable(adc->vref_n);
 	regulator_disable(adc->vref_p);
-	clk_disable_unprepare(adc->cclk);
 }
 
 static const struct of_device_id adc12138_dt_ids[] = {

drivers/iio/adc/ti-adc128s052.c

···
 		.info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE) \
 	}
 
-static const struct iio_chan_spec adc128s052_channels[] = {
+static const struct iio_chan_spec simple_1chan_adc_channels[] = {
+	ADC128_VOLTAGE_CHANNEL(0),
+};
+
+static const struct iio_chan_spec simple_2chan_adc_channels[] = {
+	ADC128_VOLTAGE_CHANNEL(0),
+	ADC128_VOLTAGE_CHANNEL(1),
+};
+
+static const struct iio_chan_spec simple_4chan_adc_channels[] = {
+	ADC128_VOLTAGE_CHANNEL(0),
+	ADC128_VOLTAGE_CHANNEL(1),
+	ADC128_VOLTAGE_CHANNEL(2),
+	ADC128_VOLTAGE_CHANNEL(3),
+};
+
+static const struct iio_chan_spec simple_8chan_adc_channels[] = {
 	ADC128_VOLTAGE_CHANNEL(0),
 	ADC128_VOLTAGE_CHANNEL(1),
 	ADC128_VOLTAGE_CHANNEL(2),
···
 	ADC128_VOLTAGE_CHANNEL(7),
 };
 
-static const struct iio_chan_spec adc122s021_channels[] = {
-	ADC128_VOLTAGE_CHANNEL(0),
-	ADC128_VOLTAGE_CHANNEL(1),
-};
-
-static const struct iio_chan_spec adc124s021_channels[] = {
-	ADC128_VOLTAGE_CHANNEL(0),
-	ADC128_VOLTAGE_CHANNEL(1),
-	ADC128_VOLTAGE_CHANNEL(2),
-	ADC128_VOLTAGE_CHANNEL(3),
-};
-
 static const char * const bd79104_regulators[] = { "iovdd" };
 
-static const struct adc128_configuration adc128_config[] = {
-	{
-		.channels = adc128s052_channels,
-		.num_channels = ARRAY_SIZE(adc128s052_channels),
-		.refname = "vref",
-	}, {
-		.channels = adc122s021_channels,
-		.num_channels = ARRAY_SIZE(adc122s021_channels),
-		.refname = "vref",
-	}, {
-		.channels = adc124s021_channels,
-		.num_channels = ARRAY_SIZE(adc124s021_channels),
-		.refname = "vref",
-	}, {
-		.channels = adc128s052_channels,
-		.num_channels = ARRAY_SIZE(adc128s052_channels),
-		.refname = "vdd",
-		.other_regulators = &bd79104_regulators,
-		.num_other_regulators = 1,
-	},
+static const struct adc128_configuration adc122s_config = {
+	.channels = simple_2chan_adc_channels,
+	.num_channels = ARRAY_SIZE(simple_2chan_adc_channels),
+	.refname = "vref",
+};
+
+static const struct adc128_configuration adc124s_config = {
+	.channels = simple_4chan_adc_channels,
+	.num_channels = ARRAY_SIZE(simple_4chan_adc_channels),
+	.refname = "vref",
+};
+
+static const struct adc128_configuration adc128s_config = {
+	.channels = simple_8chan_adc_channels,
+	.num_channels = ARRAY_SIZE(simple_8chan_adc_channels),
+	.refname = "vref",
+};
+
+static const struct adc128_configuration bd79100_config = {
+	.channels = simple_1chan_adc_channels,
+	.num_channels = ARRAY_SIZE(simple_1chan_adc_channels),
+	.refname = "vdd",
+	.other_regulators = &bd79104_regulators,
+	.num_other_regulators = 1,
+};
+
+static const struct adc128_configuration bd79101_config = {
+	.channels = simple_2chan_adc_channels,
+	.num_channels = ARRAY_SIZE(simple_2chan_adc_channels),
+	.refname = "vdd",
+	.other_regulators = &bd79104_regulators,
+	.num_other_regulators = 1,
+};
+
+static const struct adc128_configuration bd79102_config = {
+	.channels = simple_4chan_adc_channels,
+	.num_channels = ARRAY_SIZE(simple_4chan_adc_channels),
+	.refname = "vdd",
+	.other_regulators = &bd79104_regulators,
+	.num_other_regulators = 1,
+};
+
+static const struct adc128_configuration bd79104_config = {
+	.channels = simple_8chan_adc_channels,
+	.num_channels = ARRAY_SIZE(simple_8chan_adc_channels),
+	.refname = "vdd",
+	.other_regulators = &bd79104_regulators,
+	.num_other_regulators = 1,
 };
 
 static const struct iio_info adc128_info = {
···
 }
 
 static const struct of_device_id adc128_of_match[] = {
-	{ .compatible = "ti,adc128s052", .data = &adc128_config[0] },
-	{ .compatible = "ti,adc122s021", .data = &adc128_config[1] },
-	{ .compatible = "ti,adc122s051", .data = &adc128_config[1] },
-	{ .compatible = "ti,adc122s101", .data = &adc128_config[1] },
-	{ .compatible = "ti,adc124s021", .data = &adc128_config[2] },
-	{ .compatible = "ti,adc124s051", .data = &adc128_config[2] },
-	{ .compatible = "ti,adc124s101", .data = &adc128_config[2] },
-	{ .compatible = "rohm,bd79104", .data = &adc128_config[3] },
+	{ .compatible = "ti,adc128s052", .data = &adc128s_config },
+	{ .compatible = "ti,adc122s021", .data = &adc122s_config },
+	{ .compatible = "ti,adc122s051", .data = &adc122s_config },
+	{ .compatible = "ti,adc122s101", .data = &adc122s_config },
+	{ .compatible = "ti,adc124s021", .data = &adc124s_config },
+	{ .compatible = "ti,adc124s051", .data = &adc124s_config },
+	{ .compatible = "ti,adc124s101", .data = &adc124s_config },
+	{ .compatible = "rohm,bd79100", .data = &bd79100_config },
+	{ .compatible = "rohm,bd79101", .data = &bd79101_config },
+	{ .compatible = "rohm,bd79102", .data = &bd79102_config },
+	{ .compatible = "rohm,bd79103", .data = &bd79104_config },
+	{ .compatible = "rohm,bd79104", .data = &bd79104_config },
 	{ }
 };
 MODULE_DEVICE_TABLE(of, adc128_of_match);
 
 static const struct spi_device_id adc128_id[] = {
-	{ "adc128s052", (kernel_ulong_t)&adc128_config[0] },
-	{ "adc122s021",	(kernel_ulong_t)&adc128_config[1] },
-	{ "adc122s051",	(kernel_ulong_t)&adc128_config[1] },
-	{ "adc122s101",	(kernel_ulong_t)&adc128_config[1] },
-	{ "adc124s021", (kernel_ulong_t)&adc128_config[2] },
-	{ "adc124s051", (kernel_ulong_t)&adc128_config[2] },
-	{ "adc124s101", (kernel_ulong_t)&adc128_config[2] },
-	{ "bd79104", (kernel_ulong_t)&adc128_config[3] },
+	{ "adc128s052", (kernel_ulong_t)&adc128s_config },
+	{ "adc122s021",	(kernel_ulong_t)&adc122s_config },
+	{ "adc122s051",	(kernel_ulong_t)&adc122s_config },
+	{ "adc122s101",	(kernel_ulong_t)&adc122s_config },
+	{ "adc124s021", (kernel_ulong_t)&adc124s_config },
+	{ "adc124s051", (kernel_ulong_t)&adc124s_config },
+	{ "adc124s101", (kernel_ulong_t)&adc124s_config },
+	{ "bd79100", (kernel_ulong_t)&bd79100_config },
+	{ "bd79101", (kernel_ulong_t)&bd79101_config },
+	{ "bd79102", (kernel_ulong_t)&bd79102_config },
+	{ "bd79103", (kernel_ulong_t)&bd79104_config },
+	{ "bd79104", (kernel_ulong_t)&bd79104_config },
 	{ }
 };
 MODULE_DEVICE_TABLE(spi, adc128_id);
 
 static const struct acpi_device_id adc128_acpi_match[] = {
-	{ "AANT1280", (kernel_ulong_t)&adc128_config[2] },
+	{ "AANT1280", (kernel_ulong_t)&adc124s_config },
 	{ }
 };
 MODULE_DEVICE_TABLE(acpi, adc128_acpi_match);

drivers/iio/adc/ti-ads1015.c

···
 	int ret;
 	struct device *dev = regmap_get_device(data->regmap);
 
-	if (on) {
+	if (on)
 		ret = pm_runtime_resume_and_get(dev);
-	} else {
-		pm_runtime_mark_last_busy(dev);
+	else
 		ret = pm_runtime_put_autosuspend(dev);
-	}
 
 	return ret < 0 ? ret : 0;
 }

drivers/iio/adc/ti-ads1100.c

···
 
 	ret = i2c_master_recv(data->client, (char *)&buffer, sizeof(buffer));
 
-	pm_runtime_mark_last_busy(&data->client->dev);
 	pm_runtime_put_autosuspend(&data->client->dev);
 
 	if (ret < 0) {

drivers/iio/adc/ti-ads1119.c

···
 	*val = sign_extend32(sample, chan->scan_type.realbits - 1);
 	ret = IIO_VAL_INT;
 pdown:
-	pm_runtime_mark_last_busy(dev);
 	pm_runtime_put_autosuspend(dev);
 	return ret;
 }
···
 	if (ret)
 		return ret;
 
-	pm_runtime_mark_last_busy(dev);
 	pm_runtime_put_autosuspend(dev);
 
 	return 0;
···
 
 	indio_dev = devm_iio_device_alloc(dev, sizeof(*st));
 	if (!indio_dev)
-		return dev_err_probe(dev, -ENOMEM,
-				     "Failed to allocate IIO device\n");
+		return -ENOMEM;
 
 	st = iio_priv(indio_dev);
 	st->client = client;
···
 						  indio_dev->name,
 						  iio_device_id(indio_dev));
 		if (!st->trig)
-			return dev_err_probe(dev, -ENOMEM,
-					     "Failed to allocate IIO trigger\n");
+			return -ENOMEM;
 
 		st->trig->ops = &ads1119_trigger_ops;
 		iio_trigger_set_drvdata(st->trig, indio_dev);
···
 
 	ret = devm_add_action_or_reset(dev, ads1119_powerdown, st);
 	if (ret)
-		return dev_err_probe(dev, ret,
-				     "Failed to add powerdown action\n");
+		return ret;
 
 	return devm_iio_device_register(dev, indio_dev);
 }

drivers/iio/adc/ti-ads131e08.c

···
 	}
 
 	indio_dev = devm_iio_device_alloc(&spi->dev, sizeof(*st));
-	if (!indio_dev) {
-		dev_err(&spi->dev, "failed to allocate IIO device\n");
+	if (!indio_dev)
 		return -ENOMEM;
-	}
 
 	st = iio_priv(indio_dev);
 	st->info = info;
···
 
 	st->trig = devm_iio_trigger_alloc(&spi->dev, "%s-dev%d",
 		indio_dev->name, iio_device_id(indio_dev));
-	if (!st->trig) {
-		dev_err(&spi->dev, "failed to allocate IIO trigger\n");
+	if (!st->trig)
 		return -ENOMEM;
-	}
 
 	st->trig->ops = &ads131e08_trigger_ops;
 	st->trig->dev.parent = &spi->dev;

drivers/iio/adc/ti-ads7924.c

···
 
 	indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data));
 	if (!indio_dev)
-		return dev_err_probe(dev, -ENOMEM,
-				     "failed to allocate iio device\n");
+		return -ENOMEM;
 
 	data = iio_priv(indio_dev);
 
···
 
 	ret = devm_add_action_or_reset(dev, ads7924_reg_disable, data->vref_reg);
 	if (ret)
-		return dev_err_probe(dev, ret,
-				     "failed to add regulator disable action\n");
+		return ret;
 
 	ret = ads7924_reset(indio_dev);
 	if (ret < 0)
···
 
 	ret = devm_add_action_or_reset(dev, ads7924_set_idle_mode, data);
 	if (ret)
-		return dev_err_probe(dev, ret,
-				     "failed to add idle mode action\n");
+		return ret;
 
 	/* Use minimum signal acquire time. */
 	ret = regmap_update_bits(data->regmap, ADS7924_ACQCONFIG_REG,

drivers/iio/adc/ti-tsc2046.c

···
 		if (priv->poll_cnt < TI_TSC2046_POLL_CNT) {
 			priv->poll_cnt++;
 			hrtimer_start(&priv->trig_timer,
-				      ns_to_ktime(priv->scan_interval_us *
-						  NSEC_PER_USEC),
+				      us_to_ktime(priv->scan_interval_us),
 				      HRTIMER_MODE_REL_SOFT);
 
 			if (priv->poll_cnt >= TI_TSC2046_MIN_POLL_CNT) {
···
 	 * many samples. Reduce the sample rate for default (touchscreen) use
 	 * case.
 	 */
-	tim = ns_to_ktime((priv->scan_interval_us - priv->time_per_scan_us) *
-			  NSEC_PER_USEC);
+	tim = us_to_ktime(priv->scan_interval_us - priv->time_per_scan_us);
 	hrtimer_start(&priv->trig_timer, tim, HRTIMER_MODE_REL_SOFT);
 }
 

drivers/iio/adc/ti_am335x_adc.c

···
 	}
 
 	indio_dev = devm_iio_device_alloc(&pdev->dev, sizeof(*adc_dev));
-	if (!indio_dev) {
-		dev_err(&pdev->dev, "failed to allocate iio device\n");
+	if (!indio_dev)
 		return -ENOMEM;
-	}
+
 	adc_dev = iio_priv(indio_dev);
 
 	adc_dev->mfd_tscadc = ti_tscadc_dev_get(pdev);

drivers/iio/adc/twl4030-madc.c

···
 	}
 
 	iio_dev = devm_iio_device_alloc(&pdev->dev, sizeof(*madc));
-	if (!iio_dev) {
-		dev_err(&pdev->dev, "failed allocating iio device\n");
+	if (!iio_dev)
 		return -ENOMEM;
-	}
 
 	madc = iio_priv(iio_dev);
 	madc->dev = &pdev->dev;

drivers/iio/adc/vf610_adc.c

···
 
 	indio_dev = devm_iio_device_alloc(&pdev->dev, sizeof(struct vf610_adc));
 	if (!indio_dev)
-		return dev_err_probe(&pdev->dev, -ENOMEM, "Failed allocating iio device\n");
+		return -ENOMEM;
 
 	info = iio_priv(indio_dev);
 	info->dev = &pdev->dev;

drivers/iio/adc/viperboard_adc.c

···
 
 	/* registering iio */
 	indio_dev = devm_iio_device_alloc(&pdev->dev, sizeof(*adc));
-	if (!indio_dev) {
-		dev_err(&pdev->dev, "failed allocating iio device\n");
+	if (!indio_dev)
 		return -ENOMEM;
-	}
 
 	adc = iio_priv(indio_dev);
 	adc->vb = vb;

drivers/iio/buffer/industrialio-buffer-cb.c

···
 	cb_buff->private = private;
 	cb_buff->cb = cb;
 	cb_buff->buffer.access = &iio_cb_access;
-	INIT_LIST_HEAD(&cb_buff->buffer.demux_list);
 
 	cb_buff->channels = iio_channel_get_all(dev);
 	if (IS_ERR(cb_buff->channels)) {

drivers/iio/chemical/atlas-sensor.c

···
 	if (ret)
 		return ret;
 
-	pm_runtime_mark_last_busy(&data->client->dev);
 	ret = pm_runtime_put_autosuspend(&data->client->dev);
 	if (ret)
 		return ret;
···
 
 	ret = regmap_bulk_read(data->regmap, reg, val, sizeof(*val));
 
-	pm_runtime_mark_last_busy(dev);
 	pm_runtime_put_autosuspend(dev);
 
 	return ret;

drivers/iio/chemical/bme680_core.c

···
 		return ret;
 
 	ret = __bme680_read_raw(indio_dev, chan, val, val2, mask);
-	pm_runtime_mark_last_busy(dev);
 	pm_runtime_put_autosuspend(dev);
 
 	return ret;
···
 		return ret;
 
 	ret = __bme680_write_raw(indio_dev, chan, val, val2, mask);
-	pm_runtime_mark_last_busy(dev);
 	pm_runtime_put_autosuspend(dev);
 
 	return ret;
···
 	struct bme680_data *data = iio_priv(indio_dev);
 	struct device *dev = regmap_get_device(data->regmap);
 
-	pm_runtime_mark_last_busy(dev);
 	pm_runtime_put_autosuspend(dev);
 	return 0;
 }

drivers/iio/chemical/ens160_core.c

···
 	trig = devm_iio_trigger_alloc(dev, "%s-dev%d", indio_dev->name,
 				      iio_device_id(indio_dev));
 	if (!trig)
-		return dev_err_probe(dev, -ENOMEM,
-				     "failed to allocate trigger\n");
+		return -ENOMEM;
 
 	trig->ops = &ens160_trigger_ops;
 	iio_trigger_set_drvdata(trig, indio_dev);

drivers/iio/chemical/scd30_core.c

···
 	trig = devm_iio_trigger_alloc(dev, "%s-dev%d", indio_dev->name,
 				      iio_device_id(indio_dev));
 	if (!trig)
-		return dev_err_probe(dev, -ENOMEM, "failed to allocate trigger\n");
+		return -ENOMEM;
 
 	trig->ops = &scd30_trigger_ops;
 	iio_trigger_set_drvdata(trig, indio_dev);

drivers/iio/common/hid-sensors/hid-sensor-trigger.c

···
 		ret = pm_runtime_resume_and_get(&st->pdev->dev);
 	} else {
 		atomic_dec(&st->user_requested_state);
-		pm_runtime_mark_last_busy(&st->pdev->dev);
 		pm_runtime_use_autosuspend(&st->pdev->dev);
 		ret = pm_runtime_put_autosuspend(&st->pdev->dev);
 	}

drivers/iio/common/scmi_sensors/scmi_iio.c

···
 	int i;
 
 	sensor->freq_avail =
-		devm_kzalloc(&iio_dev->dev,
-			     sizeof(*sensor->freq_avail) *
-				     (sensor->sensor_info->intervals.count * 2),
+		devm_kcalloc(&iio_dev->dev,
+			     array_size(sensor->sensor_info->intervals.count, 2),
+			     sizeof(*sensor->freq_avail),
 			     GFP_KERNEL);
 	if (!sensor->freq_avail)
 		return -ENOMEM;
···
 	iiodev->info = &scmi_iio_info;
 
 	iio_channels =
-		devm_kzalloc(dev,
-			     sizeof(*iio_channels) * (iiodev->num_channels),
+		devm_kcalloc(dev, iiodev->num_channels,
+			     sizeof(*iio_channels),
 			     GFP_KERNEL);
 	if (!iio_channels)
 		return ERR_PTR(-ENOMEM);

drivers/iio/dac/ad5380.c

···
 	int ret;
 
 	indio_dev = devm_iio_device_alloc(dev, sizeof(*st));
-	if (indio_dev == NULL) {
-		dev_err(dev, "Failed to allocate iio device\n");
+	if (indio_dev == NULL)
 		return -ENOMEM;
-	}
 
 	st = iio_priv(indio_dev);
 

drivers/iio/dac/ad5764.c

···
 	int ret;
 
 	indio_dev = devm_iio_device_alloc(&spi->dev, sizeof(*st));
-	if (indio_dev == NULL) {
-		dev_err(&spi->dev, "Failed to allocate iio device\n");
+	if (indio_dev == NULL)
 		return -ENOMEM;
-	}
 
 	st = iio_priv(indio_dev);
 	spi_set_drvdata(spi, indio_dev);

drivers/iio/dac/ad5791.c

···
 /**
  * struct ad5791_state - driver instance specific data
  * @spi:			spi_device
- * @reg_vdd:		positive supply regulator
- * @reg_vss:		negative supply regulator
  * @gpio_reset:		reset gpio
  * @gpio_clear:		clear gpio
  * @gpio_ldac:		load dac gpio
···
  */
 struct ad5791_state {
 	struct spi_device		*spi;
-	struct regulator		*reg_vdd;
-	struct regulator		*reg_vss;
 	struct gpio_desc		*gpio_reset;
 	struct gpio_desc		*gpio_clear;
 	struct gpio_desc		*gpio_ldac;

drivers/iio/dac/ds4424.c

···
 	int ret;
 
 	indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data));
-	if (!indio_dev) {
-		dev_err(&client->dev, "iio dev alloc failed.\n");
+	if (!indio_dev)
 		return -ENOMEM;
-	}
 
 	data = iio_priv(indio_dev);
 	i2c_set_clientdata(client, indio_dev);

drivers/iio/dac/stm32-dac.c

···
 
 	ret = regmap_update_bits(dac->common->regmap, STM32_DAC_CR, msk, en);
 	mutex_unlock(&dac->lock);
-	if (ret < 0) {
+	if (ret) {
 		dev_err(&indio_dev->dev, "%s failed\n", str_enable_disable(en));
-		goto err_put_pm;
+		if (enable)
+			pm_runtime_put_autosuspend(dev);
+		return ret;
 	}
 
 	/*
···
 	if (en && dac->common->hfsel)
 		udelay(1);
 
-	if (!enable) {
-		pm_runtime_mark_last_busy(dev);
+	if (!enable)
 		pm_runtime_put_autosuspend(dev);
-	}
 
 	return 0;
-
-err_put_pm:
-	if (enable) {
-		pm_runtime_mark_last_busy(dev);
-		pm_runtime_put_autosuspend(dev);
-	}
-
-	return ret;
 }
 
 static int stm32_dac_get_value(struct stm32_dac *dac, int channel, int *val)
···
 	if (ret)
 		goto err_pm_put;
 
-	pm_runtime_mark_last_busy(dev);
 	pm_runtime_put_autosuspend(dev);
 
 	return 0;

drivers/iio/dac/ti-dac7311.c

···
 	int ret;
 
 	indio_dev = devm_iio_device_alloc(dev, sizeof(*ti_dac));
-	if (!indio_dev) {
-		dev_err(dev, "can not allocate iio device\n");
+	if (!indio_dev)
 		return -ENOMEM;
-	}
 
 	spi->mode = SPI_MODE_1;
 	spi->bits_per_word = 16;

drivers/iio/frequency/adf4350.c

···
 
 	ret = devm_add_action_or_reset(&spi->dev, adf4350_power_down, indio_dev);
 	if (ret)
-		return dev_err_probe(&spi->dev, ret,
-				     "Failed to add action to managed power down\n");
+		return ret;
 
 	return devm_iio_device_register(&spi->dev, indio_dev);
 }

drivers/iio/gyro/bmg160_core.c

···
 
 	if (on)
 		ret = pm_runtime_get_sync(dev);
-	else {
-		pm_runtime_mark_last_busy(dev);
+	else
 		ret = pm_runtime_put_autosuspend(dev);
-	}
 
 	if (ret < 0) {
 		dev_err(dev, "Failed: bmg160_set_power_state for %d\n", on);

drivers/iio/gyro/fxas21002c_core.c

···
 {
 	struct device *dev = regmap_get_device(data->regmap);
 
-	pm_runtime_mark_last_busy(dev);
-
 	return pm_runtime_put_autosuspend(dev);
 }
 

drivers/iio/gyro/mpu3050-core.c

···
 
 out_read_raw_unlock:
 	mutex_unlock(&mpu3050->lock);
-	pm_runtime_mark_last_busy(mpu3050->dev);
 	pm_runtime_put_autosuspend(mpu3050->dev);
 
 	return ret;
···
 {
 	struct mpu3050 *mpu3050 = iio_priv(indio_dev);
 
-	pm_runtime_mark_last_busy(mpu3050->dev);
 	pm_runtime_put_autosuspend(mpu3050->dev);
 
 	return 0;
···
 		if (ret)
 			dev_err(mpu3050->dev, "error resetting FIFO\n");
 
-		pm_runtime_mark_last_busy(mpu3050->dev);
 		pm_runtime_put_autosuspend(mpu3050->dev);
 		mpu3050->hw_irq_trigger = false;
 

drivers/iio/gyro/mpu3050-i2c.c

···
 {
 	struct mpu3050 *mpu3050 = i2c_mux_priv(mux);
 
-	pm_runtime_mark_last_busy(mpu3050->dev);
 	pm_runtime_put_autosuspend(mpu3050->dev);
 	return 0;
 }

drivers/iio/health/afe4403.c

···
 
 /**
  * struct afe4403_data - AFE4403 device instance data
- * @dev: Device structure
  * @spi: SPI device handle
  * @regmap: Register map of the device
  * @fields: Register fields of the device
···
  * @buffer: Used to construct data layout to push into IIO buffer.
  */
 struct afe4403_data {
-	struct device *dev;
 	struct spi_device *spi;
 	struct regmap *regmap;
 	struct regmap_field *fields[F_MAX_FIELDS];
···
 
 static int afe4403_probe(struct spi_device *spi)
 {
+	struct device *dev = &spi->dev;
 	struct iio_dev *indio_dev;
 	struct afe4403_data *afe;
 	int i, ret;
 
-	indio_dev = devm_iio_device_alloc(&spi->dev, sizeof(*afe));
+	indio_dev = devm_iio_device_alloc(dev, sizeof(*afe));
 	if (!indio_dev)
 		return -ENOMEM;
 
 	afe = iio_priv(indio_dev);
 	spi_set_drvdata(spi, indio_dev);
 
-	afe->dev = &spi->dev;
 	afe->spi = spi;
 	afe->irq = spi->irq;
 
 	afe->regmap = devm_regmap_init_spi(spi, &afe4403_regmap_config);
 	if (IS_ERR(afe->regmap)) {
-		dev_err(afe->dev, "Unable to allocate register map\n");
+		dev_err(dev, "Unable to allocate register map\n");
 		return PTR_ERR(afe->regmap);
 	}
 
 	for (i = 0; i < F_MAX_FIELDS; i++) {
-		afe->fields[i] = devm_regmap_field_alloc(afe->dev, afe->regmap,
+		afe->fields[i] = devm_regmap_field_alloc(dev, afe->regmap,
 							 afe4403_reg_fields[i]);
 		if (IS_ERR(afe->fields[i])) {
-			dev_err(afe->dev, "Unable to allocate regmap fields\n");
+			dev_err(dev, "Unable to allocate regmap fields\n");
 			return PTR_ERR(afe->fields[i]);
 		}
 	}
 
-	afe->regulator = devm_regulator_get(afe->dev, "tx_sup");
+	afe->regulator = devm_regulator_get(dev, "tx_sup");
 	if (IS_ERR(afe->regulator))
-		return dev_err_probe(afe->dev, PTR_ERR(afe->regulator),
+		return dev_err_probe(dev, PTR_ERR(afe->regulator),
 				     "Unable to get regulator\n");
 
 	ret = regulator_enable(afe->regulator);
 	if (ret) {
-		dev_err(afe->dev, "Unable to enable regulator\n");
+		dev_err(dev, "Unable to enable regulator\n");
 		return ret;
 	}
-	ret = devm_add_action_or_reset(afe->dev, afe4403_regulator_disable, afe->regulator);
+	ret = devm_add_action_or_reset(dev, afe4403_regulator_disable, afe->regulator);
 	if (ret) {
-		dev_err(afe->dev, "Unable to add regulator disable action\n");
+		dev_err(dev, "Unable to add regulator disable action\n");
 		return ret;
 	}
 
 	ret = regmap_write(afe->regmap, AFE440X_CONTROL0,
 			   AFE440X_CONTROL0_SW_RESET);
 	if (ret) {
-		dev_err(afe->dev, "Unable to reset device\n");
+		dev_err(dev, "Unable to reset device\n");
 		return ret;
 	}
 
 	ret = regmap_multi_reg_write(afe->regmap, afe4403_reg_sequences,
 				     ARRAY_SIZE(afe4403_reg_sequences));
 	if (ret) {
-		dev_err(afe->dev, "Unable to set register defaults\n");
+		dev_err(dev, "Unable to set register defaults\n");
 		return ret;
 	}
 
···
 	indio_dev->info = &afe4403_iio_info;
 
 	if (afe->irq > 0) {
-		afe->trig = devm_iio_trigger_alloc(afe->dev,
+		afe->trig = devm_iio_trigger_alloc(dev,
 						   "%s-dev%d",
 						   indio_dev->name,
 						   iio_device_id(indio_dev));
-		if (!afe->trig) {
-			dev_err(afe->dev, "Unable to allocate IIO trigger\n");
+		if (!afe->trig)
 			return -ENOMEM;
-		}
 
 		iio_trigger_set_drvdata(afe->trig, indio_dev);
 
-		ret = devm_iio_trigger_register(afe->dev, afe->trig);
+		ret = devm_iio_trigger_register(dev, afe->trig);
 		if (ret) {
-			dev_err(afe->dev, "Unable to register IIO trigger\n");
+			dev_err(dev, "Unable to register IIO trigger\n");
 			return ret;
 		}
 
-		ret = devm_request_threaded_irq(afe->dev, afe->irq,
+		ret = devm_request_threaded_irq(dev, afe->irq,
 						iio_trigger_generic_data_rdy_poll,
 						NULL, IRQF_ONESHOT,
 						AFE4403_DRIVER_NAME,
 						afe->trig);
 		if (ret) {
-			dev_err(afe->dev, "Unable to request IRQ\n");
+			dev_err(dev, "Unable to request IRQ\n");
 			return ret;
 		}
 	}
 
-	ret = devm_iio_triggered_buffer_setup(afe->dev, indio_dev,
+	ret = devm_iio_triggered_buffer_setup(dev, indio_dev,
 					      &iio_pollfunc_store_time,
 					      afe4403_trigger_handler, NULL);
 	if (ret) {
-		dev_err(afe->dev, "Unable to setup buffer\n");
+		dev_err(dev, "Unable to setup buffer\n");
 		return ret;
 	}
 
-	ret = devm_iio_device_register(afe->dev, indio_dev);
+	ret = devm_iio_device_register(dev, indio_dev);
 	if (ret) {
-		dev_err(afe->dev, "Unable to register IIO device\n");
+		dev_err(dev, "Unable to register IIO device\n");
 		return ret;
 	}
 

drivers/iio/health/afe4404.c

···
 
 /**
  * struct afe4404_data - AFE4404 device instance data
- * @dev: Device structure
  * @regmap: Register map of the device
  * @fields: Register fields of the device
  * @regulator: Pointer to the regulator for the IC
···
  * @buffer: Used to construct a scan to push to the iio buffer.
  */
 struct afe4404_data {
-	struct device *dev;
 	struct regmap *regmap;
 	struct regmap_field *fields[F_MAX_FIELDS];
 	struct regulator *regulator;
···
 
 static int afe4404_probe(struct i2c_client *client)
 {
+	struct device *dev = &client->dev;
 	struct iio_dev *indio_dev;
 	struct afe4404_data *afe;
 	int i, ret;
 
-	indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*afe));
+	indio_dev = devm_iio_device_alloc(dev, sizeof(*afe));
 	if (!indio_dev)
 		return -ENOMEM;
 
 	afe = iio_priv(indio_dev);
 	i2c_set_clientdata(client, indio_dev);
 
-	afe->dev = &client->dev;
 	afe->irq = client->irq;
 
 	afe->regmap = devm_regmap_init_i2c(client, &afe4404_regmap_config);
 	if (IS_ERR(afe->regmap)) {
-		dev_err(afe->dev, "Unable to allocate register map\n");
+		dev_err(dev, "Unable to allocate register map\n");
 		return PTR_ERR(afe->regmap);
 	}
 
 	for (i = 0; i < F_MAX_FIELDS; i++) {
-		afe->fields[i] = devm_regmap_field_alloc(afe->dev, afe->regmap,
+		afe->fields[i] = devm_regmap_field_alloc(dev, afe->regmap,
 							 afe4404_reg_fields[i]);
 		if (IS_ERR(afe->fields[i])) {
-			dev_err(afe->dev, "Unable to allocate regmap fields\n");
+			dev_err(dev, "Unable to allocate regmap fields\n");
 			return PTR_ERR(afe->fields[i]);
 		}
 	}
 
-	afe->regulator = devm_regulator_get(afe->dev, "tx_sup");
+	afe->regulator = devm_regulator_get(dev, "tx_sup");
 	if (IS_ERR(afe->regulator))
-		return dev_err_probe(afe->dev, PTR_ERR(afe->regulator),
+		return dev_err_probe(dev, PTR_ERR(afe->regulator),
 				     "Unable to get regulator\n");
 
 	ret = regulator_enable(afe->regulator);
 	if (ret) {
-		dev_err(afe->dev, "Unable to enable regulator\n");
+		dev_err(dev, "Unable to enable regulator\n");
 		return ret;
 	}
-	ret = devm_add_action_or_reset(afe->dev, afe4404_regulator_disable, afe->regulator);
+	ret = devm_add_action_or_reset(dev, afe4404_regulator_disable, afe->regulator);
 	if (ret) {
-		dev_err(afe->dev, "Unable to enable regulator\n");
+		dev_err(dev, "Unable to enable regulator\n");
 		return ret;
 	}
 
 	ret = regmap_write(afe->regmap, AFE440X_CONTROL0,
 			   AFE440X_CONTROL0_SW_RESET);
 	if (ret) {
-		dev_err(afe->dev, "Unable to reset device\n");
+		dev_err(dev, "Unable to reset device\n");
 		return ret;
 	}
 
 	ret = regmap_multi_reg_write(afe->regmap, afe4404_reg_sequences,
 				     ARRAY_SIZE(afe4404_reg_sequences));
 	if (ret) {
-		dev_err(afe->dev, "Unable to set register defaults\n");
+		dev_err(dev, "Unable to set register defaults\n");
 		return ret;
 	}
 
···
 	indio_dev->info = &afe4404_iio_info;
 
 	if (afe->irq > 0) {
-		afe->trig = devm_iio_trigger_alloc(afe->dev,
+		afe->trig = devm_iio_trigger_alloc(dev,
 						   "%s-dev%d",
 						   indio_dev->name,
 						   iio_device_id(indio_dev));
-		if (!afe->trig) {
-			dev_err(afe->dev, "Unable to allocate IIO trigger\n");
+		if (!afe->trig)
 			return -ENOMEM;
-		}
 
 		iio_trigger_set_drvdata(afe->trig, indio_dev);
 
-		ret = devm_iio_trigger_register(afe->dev, afe->trig);
+		ret = devm_iio_trigger_register(dev, afe->trig);
 		if (ret) {
-			dev_err(afe->dev, "Unable to register IIO trigger\n");
+			dev_err(dev, "Unable to register IIO trigger\n");
 			return ret;
 		}
 
-		ret = devm_request_threaded_irq(afe->dev, afe->irq,
+		ret = devm_request_threaded_irq(dev, afe->irq,
 						iio_trigger_generic_data_rdy_poll,
 						NULL, IRQF_ONESHOT,
 						AFE4404_DRIVER_NAME,
 						afe->trig);
 		if (ret) {
-			dev_err(afe->dev, "Unable to request IRQ\n");
+			dev_err(dev, "Unable to request IRQ\n");
 			return ret;
 		}
 	}
 
-	ret = devm_iio_triggered_buffer_setup(afe->dev, indio_dev,
+	ret = devm_iio_triggered_buffer_setup(dev, indio_dev,
 					      &iio_pollfunc_store_time,
 					      afe4404_trigger_handler, NULL);
 	if (ret) {
-		dev_err(afe->dev, "Unable to setup buffer\n");
+		dev_err(dev, "Unable to setup buffer\n");
 		return ret;
 	}
 
-	ret = devm_iio_device_register(afe->dev, indio_dev);
+	ret = devm_iio_device_register(dev, indio_dev);
 	if (ret) {
-		dev_err(afe->dev, "Unable to register IIO device\n");
+		dev_err(dev, "Unable to register IIO device\n");
 		return ret;
 	}
 

drivers/iio/humidity/am2315.c

···
 	struct am2315_data *data;
 
 	indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data));
-	if (!indio_dev) {
-		dev_err(&client->dev, "iio allocation failed!\n");
+	if (!indio_dev)
 		return -ENOMEM;
-	}
 
 	data = iio_priv(indio_dev);
 	data->client = client;

drivers/iio/humidity/dht11.c

···
 	struct iio_dev *iio;
 
 	iio = devm_iio_device_alloc(dev, sizeof(*dht11));
-	if (!iio) {
-		dev_err(dev, "Failed to allocate IIO device\n");
+	if (!iio)
 		return -ENOMEM;
-	}
 
 	dht11 = iio_priv(iio);
 	dht11->dev = dev;

drivers/iio/imu/adis16475.c

···
 	return 0;
 }
 
-
 static int adis16475_probe(struct spi_device *spi)
 {
 	struct iio_dev *indio_dev;

drivers/iio/imu/bmi270/bmi270_i2c.c

···
 static const struct acpi_device_id bmi270_acpi_match[] = {
 	/* GPD Win Mini, Aya Neo AIR Pro, OXP Mini Pro, etc. */
 	{ "BMI0160",  (kernel_ulong_t)&bmi260_chip_info },
+	/* GPD Win Max 2 2023(sincice BIOS v0.40), etc. */
+	{ "BMI0260",  (kernel_ulong_t)&bmi260_chip_info },
 	{ }
 };
 

drivers/iio/imu/bmi323/bmi323_core.c

···
 
 	indio_dev = devm_iio_device_alloc(dev, sizeof(*data));
 	if (!indio_dev)
-		return dev_err_probe(dev, -ENOMEM,
-				     "Failed to allocate device\n");
+		return -ENOMEM;
 
 	ret = devm_regulator_bulk_get_enable(dev, ARRAY_SIZE(regulator_names),
 					     regulator_names);

drivers/iio/imu/inv_icm42600/inv_icm42600.h

···
 	enum inv_icm42600_chip chip;
 	const char *name;
 	struct regmap *map;
-	struct regulator *vdd_supply;
 	struct regulator *vddio_supply;
 	int irq;
 	struct iio_mount_matrix orientation;

drivers/iio/imu/inv_icm42600/inv_icm42600_accel.c

···
 		ret = -EINVAL;
 exit:
 	mutex_unlock(&st->lock);
-	pm_runtime_mark_last_busy(dev);
 	pm_runtime_put_autosuspend(dev);
 	return ret;
 }
···
 	conf.fs = idx / 2;
 
 	pm_runtime_get_sync(dev);
-	mutex_lock(&st->lock);
 
-	ret = inv_icm42600_set_accel_conf(st, &conf, NULL);
+	scoped_guard(mutex, &st->lock)
+		ret = inv_icm42600_set_accel_conf(st, &conf, NULL);
 
-	mutex_unlock(&st->lock);
-	pm_runtime_mark_last_busy(dev);
 	pm_runtime_put_autosuspend(dev);
 
 	return ret;
···
 
 out_unlock:
 	mutex_unlock(&st->lock);
-	pm_runtime_mark_last_busy(dev);
 	pm_runtime_put_autosuspend(dev);
 
 	return ret;
···
 	memcpy(data, st->buffer, sizeof(data));
 
 	mutex_unlock(&st->lock);
-	pm_runtime_mark_last_busy(dev);
 	pm_runtime_put_autosuspend(dev);
 	if (ret)
 		return ret;
···
 
 out_unlock:
 	mutex_unlock(&st->lock);
-	pm_runtime_mark_last_busy(dev);
 	pm_runtime_put_autosuspend(dev);
 	return ret;
 }
···
 						   unsigned int val)
 {
 	struct inv_icm42600_state *st = iio_device_get_drvdata(indio_dev);
-	int ret;
 
-	mutex_lock(&st->lock);
+	guard(mutex)(&st->lock);
 
 	st->fifo.watermark.accel = val;
-	ret = inv_icm42600_buffer_update_watermark(st);
-
-	mutex_unlock(&st->lock);
-
-	return ret;
+	return inv_icm42600_buffer_update_watermark(st);
 }
 
 static int inv_icm42600_accel_hwfifo_flush(struct iio_dev *indio_dev,
···
 	if (count == 0)
 		return 0;
 
-	mutex_lock(&st->lock);
+	guard(mutex)(&st->lock);
 
 	ret = inv_icm42600_buffer_hwfifo_flush(st, count);
-	if (!ret)
-		ret = st->fifo.nb.accel;
+	if (ret)
+		return ret;
 
-	mutex_unlock(&st->lock);
-
-	return ret;
+	return st->fifo.nb.accel;
 }
 
 static int inv_icm42600_accel_read_event_config(struct iio_dev *indio_dev,

drivers/iio/imu/inv_icm42600/inv_icm42600_buffer.c

···
 
 #include <linux/kernel.h>
 #include <linux/device.h>
+#include <linux/minmax.h>
 #include <linux/mutex.h>
 #include <linux/pm_runtime.h>
 #include <linux/regmap.h>
···
 
 void inv_icm42600_buffer_update_fifo_period(struct inv_icm42600_state *st)
 {
-	u32 period_gyro, period_accel, period;
+	u32 period_gyro, period_accel;
 
 	if (st->fifo.en & INV_ICM42600_SENSOR_GYRO)
 		period_gyro = inv_icm42600_odr_to_period(st->conf.gyro.odr);
···
 	else
 		period_accel = U32_MAX;
 
-	if (period_gyro <= period_accel)
-		period = period_gyro;
-	else
-		period = period_accel;
-
-	st->fifo.period = period;
+	st->fifo.period = min(period_gyro, period_accel);
 }
 
 int inv_icm42600_buffer_set_fifo_en(struct inv_icm42600_state *st,
···
 {
 	size_t packet_size, wm_size;
 	unsigned int wm_gyro, wm_accel, watermark;
-	u32 period_gyro, period_accel, period;
+	u32 period_gyro, period_accel;
 	u32 latency_gyro, latency_accel, latency;
 	bool restore;
 	__le16 raw_wm;
···
 			latency = latency_gyro - (latency_accel % latency_gyro);
 		else
 			latency = latency_accel - (latency_gyro % latency_accel);
-		/* use the shortest period */
-		if (period_gyro <= period_accel)
-			period = period_gyro;
-		else
-			period = period_accel;
 		/* all this works because periods are multiple of each others */
-		watermark = latency / period;
+		watermark = latency / min(period_gyro, period_accel);
 		if (watermark < 1)
 			watermark = 1;
 		/* update effective watermark */
···
 
 	pm_runtime_get_sync(dev);
 
-	mutex_lock(&st->lock);
+	guard(mutex)(&st->lock);
 	inv_sensors_timestamp_reset(ts);
-	mutex_unlock(&st->lock);
 
 	return 0;
 }
···
 	struct inv_icm42600_state *st = iio_device_get_drvdata(indio_dev);
 	int ret;
 
-	mutex_lock(&st->lock);
+	guard(mutex)(&st->lock);
 
-	/* exit if FIFO is already on */
 	if (st->fifo.on) {
-		ret = 0;
-		goto out_on;
+		st->fifo.on++;
+		return 0;
 	}
 
 	/* set FIFO threshold interrupt */
 	ret = regmap_set_bits(st->map, INV_ICM42600_REG_INT_SOURCE0,
 			      INV_ICM42600_INT_SOURCE0_FIFO_THS_INT1_EN);
 	if (ret)
-		goto out_unlock;
+		return ret;
 
 	/* flush FIFO data */
 	ret = regmap_write(st->map, INV_ICM42600_REG_SIGNAL_PATH_RESET,
 			   INV_ICM42600_SIGNAL_PATH_RESET_FIFO_FLUSH);
 	if (ret)
-		goto out_unlock;
+		return ret;
 
 	/* set FIFO in streaming mode */
 	ret = regmap_write(st->map, INV_ICM42600_REG_FIFO_CONFIG,
 			   INV_ICM42600_FIFO_CONFIG_STREAM);
 	if (ret)
-		goto out_unlock;
+		return ret;
 
 	/* workaround: first read of FIFO count after reset is always 0 */
 	ret = regmap_bulk_read(st->map, INV_ICM42600_REG_FIFO_COUNT, st->buffer, 2);
 	if (ret)
-		goto out_unlock;
+		return ret;
 
-out_on:
-	/* increase FIFO on counter */
 	st->fifo.on++;
-out_unlock:
-	mutex_unlock(&st->lock);
-	return ret;
+
+	return 0;
 }
 
 static int inv_icm42600_buffer_predisable(struct iio_dev *indio_dev)
···
 	struct inv_icm42600_state *st = iio_device_get_drvdata(indio_dev);
 	int ret;
 
-	mutex_lock(&st->lock);
+	guard(mutex)(&st->lock);
 
-	/* exit if there are several sensors using the FIFO */
 	if (st->fifo.on > 1) {
-		ret = 0;
-		goto out_off;
+		st->fifo.on--;
+		return 0;
 	}
 
 	/* set FIFO in bypass mode */
 	ret = regmap_write(st->map, INV_ICM42600_REG_FIFO_CONFIG,
 			   INV_ICM42600_FIFO_CONFIG_BYPASS);
 	if (ret)
-		goto out_unlock;
+		return ret;
 
 	/* flush FIFO data */
 	ret = regmap_write(st->map, INV_ICM42600_REG_SIGNAL_PATH_RESET,
 			   INV_ICM42600_SIGNAL_PATH_RESET_FIFO_FLUSH);
 	if (ret)
-		goto out_unlock;
+		return ret;
 
 	/* disable FIFO threshold interrupt */
 	ret = regmap_clear_bits(st->map, INV_ICM42600_REG_INT_SOURCE0,
 				INV_ICM42600_INT_SOURCE0_FIFO_THS_INT1_EN);
 	if (ret)
-		goto out_unlock;
+		return ret;
 
-out_off:
-	/* decrease FIFO on counter */
 	st->fifo.on--;
-out_unlock:
-	mutex_unlock(&st->lock);
-	return ret;
+
+	return 0;
 }
 
 static int inv_icm42600_buffer_postdisable(struct iio_dev *indio_dev)
···
 	if (sleep)
 		msleep(sleep);
 
-	pm_runtime_mark_last_busy(dev);
 	pm_runtime_put_autosuspend(dev);
 
 	return ret;

drivers/iio/imu/inv_icm42600/inv_icm42600_core.c

···
 			     unsigned int writeval, unsigned int *readval)
 {
 	struct inv_icm42600_state *st = iio_device_get_drvdata(indio_dev);
-	int ret;
 
-	mutex_lock(&st->lock);
+	guard(mutex)(&st->lock);
 
 	if (readval)
-		ret = regmap_read(st->map, reg, readval);
-	else
-		ret = regmap_write(st->map, reg, writeval);
+		return regmap_read(st->map, reg, readval);
 
-	mutex_unlock(&st->lock);
-
-	return ret;
+	return regmap_write(st->map, reg, writeval);
 }
 
 static int inv_icm42600_set_conf(struct inv_icm42600_state *st,
···
 	return 0;
 }
 
-static void inv_icm42600_disable_vdd_reg(void *_data)
-{
-	struct inv_icm42600_state *st = _data;
-	const struct device *dev = regmap_get_device(st->map);
-	int ret;
-
-	ret = regulator_disable(st->vdd_supply);
-	if (ret)
-		dev_err(dev, "failed to disable vdd error %d\n", ret);
-}
-
 static void inv_icm42600_disable_vddio_reg(void *_data)
 {
 	struct inv_icm42600_state *st = _data;
-	const struct device *dev = regmap_get_device(st->map);
-	int ret;
+	struct device *dev = regmap_get_device(st->map);
 
-	ret = regulator_disable(st->vddio_supply);
-	if (ret)
-		dev_err(dev, "failed to disable vddio error %d\n", ret);
-}
+	if (pm_runtime_status_suspended(dev))
+		return;
 
-static void inv_icm42600_disable_pm(void *_data)
-{
-	struct device *dev = _data;
-
-	pm_runtime_put_sync(dev);
-	pm_runtime_disable(dev);
+	regulator_disable(st->vddio_supply);
 }
 
 int inv_icm42600_core_probe(struct regmap *regmap, int chip,
···
 		return ret;
 	}
 
-	st->vdd_supply = devm_regulator_get(dev, "vdd");
-	if (IS_ERR(st->vdd_supply))
-		return PTR_ERR(st->vdd_supply);
+	ret = devm_regulator_get_enable(dev, "vdd");
+	if (ret)
+		return dev_err_probe(dev, ret,
+				     "Failed to get vdd regulator\n");
+
+	msleep(INV_ICM42600_POWER_UP_TIME_MS);
 
 	st->vddio_supply = devm_regulator_get(dev, "vddio");
 	if (IS_ERR(st->vddio_supply))
 		return PTR_ERR(st->vddio_supply);
-
-	ret = regulator_enable(st->vdd_supply);
-	if (ret)
-		return ret;
-	msleep(INV_ICM42600_POWER_UP_TIME_MS);
-
-	ret = devm_add_action_or_reset(dev, inv_icm42600_disable_vdd_reg, st);
-	if (ret)
-		return ret;
 
 	ret = inv_icm42600_enable_regulator_vddio(st);
 	if (ret)
···
 		return ret;
 
 	/* setup runtime power management */
-	ret = pm_runtime_set_active(dev);
+	ret = devm_pm_runtime_set_active_enabled(dev);
 	if (ret)
 		return ret;
-	pm_runtime_get_noresume(dev);
-	pm_runtime_enable(dev);
+
 	pm_runtime_set_autosuspend_delay(dev, INV_ICM42600_SUSPEND_DELAY_MS);
 	pm_runtime_use_autosuspend(dev);
-	pm_runtime_put(dev);
 
-	return devm_add_action_or_reset(dev, inv_icm42600_disable_pm, dev);
+	return ret;
 }
 EXPORT_SYMBOL_NS_GPL(inv_icm42600_core_probe, "IIO_ICM42600");
 
···
 	int accel_conf;
 	int ret;
 
-	mutex_lock(&st->lock);
+	guard(mutex)(&st->lock);
 
 	st->suspended.gyro = st->conf.gyro.mode;
 	st->suspended.accel = st->conf.accel.mode;
 	st->suspended.temp = st->conf.temp_en;
-	if (pm_runtime_suspended(dev)) {
-		ret = 0;
-		goto out_unlock;
-	}
+	if (pm_runtime_suspended(dev))
+		return 0;
 
 	/* disable FIFO data streaming */
 	if (st->fifo.on) {
 		ret = regmap_write(st->map, INV_ICM42600_REG_FIFO_CONFIG,
 				   INV_ICM42600_FIFO_CONFIG_BYPASS);
 		if (ret)
-			goto out_unlock;
+			return ret;
 	}
 
 	/* keep chip on and wake-up capable if APEX and wakeup on */
···
 		if (st->apex.wom.enable) {
 			ret = inv_icm42600_disable_wom(st);
 			if (ret)
-				goto out_unlock;
+				return ret;
 		}
 		accel_conf = INV_ICM42600_SENSOR_MODE_OFF;
 	}
···
 	ret = inv_icm42600_set_pwr_mgmt0(st, INV_ICM42600_SENSOR_MODE_OFF,
 					 accel_conf, false, NULL);
 	if (ret)
-		goto out_unlock;
+		return ret;
 
 	/* disable vddio regulator if chip is sleeping */
 	if (!wakeup)
 		regulator_disable(st->vddio_supply);
 
-out_unlock:
-	mutex_unlock(&st->lock);
-	return ret;
+	return 0;
 }
 
 /*
···
 	bool wakeup;
 	int ret;
 
-	mutex_lock(&st->lock);
+	guard(mutex)(&st->lock);
+
+	if (pm_runtime_suspended(dev))
+		return 0;
 
 	/* check wakeup capability */
 	accel_dev = &st->indio_accel->dev;
···
 	} else {
 		ret = inv_icm42600_enable_regulator_vddio(st);
 		if (ret)
-			goto out_unlock;
+			return ret;
 	}
-
-	pm_runtime_disable(dev);
-	pm_runtime_set_active(dev);
-	pm_runtime_enable(dev);
 
 	/* restore sensors state */
 	ret = inv_icm42600_set_pwr_mgmt0(st, st->suspended.gyro,
 					 st->suspended.accel,
 					 st->suspended.temp, NULL);
 	if (ret)
-		goto out_unlock;
+		return ret;
 
 	/* restore APEX features if disabled */
 	if (!wakeup && st->apex.wom.enable) {
 		ret = inv_icm42600_enable_wom(st);
 		if (ret)
-			goto out_unlock;
+			return ret;
 	}
 
 	/* restore FIFO data streaming */
···
 				   INV_ICM42600_FIFO_CONFIG_STREAM);
 	}
 
-out_unlock:
-	mutex_unlock(&st->lock);
-	return ret;
+	return 0;
 }
 
 /* Runtime suspend will turn off sensors that are enabled by iio devices. */
···
 	struct inv_icm42600_state *st = dev_get_drvdata(dev);
 	int ret;
 
-	mutex_lock(&st->lock);
+	guard(mutex)(&st->lock);
 
 	/* disable all sensors */
 	ret = inv_icm42600_set_pwr_mgmt0(st, INV_ICM42600_SENSOR_MODE_OFF,
 					 INV_ICM42600_SENSOR_MODE_OFF, false,
 					 NULL);
 	if (ret)
-		goto error_unlock;
+		return ret;
 
 	regulator_disable(st->vddio_supply);
 
-error_unlock:
-	mutex_unlock(&st->lock);
-	return ret;
+	return 0;
 }
 
 /* Sensors are enabled by iio devices, no need to turn them back on here. */
 static int inv_icm42600_runtime_resume(struct device *dev)
 {
 	struct inv_icm42600_state *st = dev_get_drvdata(dev);
-	int ret;
 
-	mutex_lock(&st->lock);
+	guard(mutex)(&st->lock);
 
-	ret = inv_icm42600_enable_regulator_vddio(st);
-
-	mutex_unlock(&st->lock);
-	return ret;
+	return inv_icm42600_enable_regulator_vddio(st);
 }
 
 EXPORT_NS_GPL_DEV_PM_OPS(inv_icm42600_pm_ops, IIO_ICM42600) = {

drivers/iio/imu/inv_icm42600/inv_icm42600_gyro.c

···
 		ret = -EINVAL;
 exit:
 	mutex_unlock(&st->lock);
-	pm_runtime_mark_last_busy(dev);
 	pm_runtime_put_autosuspend(dev);
 	return ret;
 }
···
 	conf.fs = idx / 2;
 
 	pm_runtime_get_sync(dev);
-	mutex_lock(&st->lock);
 
-	ret = inv_icm42600_set_gyro_conf(st, &conf, NULL);
+	scoped_guard(mutex, &st->lock)
+		ret = inv_icm42600_set_gyro_conf(st, &conf, NULL);
 
-	mutex_unlock(&st->lock);
-	pm_runtime_mark_last_busy(dev);
 	pm_runtime_put_autosuspend(dev);
 
 	return ret;
···
 
 out_unlock:
 	mutex_unlock(&st->lock);
-	pm_runtime_mark_last_busy(dev);
 	pm_runtime_put_autosuspend(dev);
 
 	return ret;
···
 	memcpy(data, st->buffer, sizeof(data));
 
 	mutex_unlock(&st->lock);
-	pm_runtime_mark_last_busy(dev);
 	pm_runtime_put_autosuspend(dev);
 	if (ret)
 		return ret;
···
 
 out_unlock:
 	mutex_unlock(&st->lock);
-	pm_runtime_mark_last_busy(dev);
 	pm_runtime_put_autosuspend(dev);
 	return ret;
 }
···
 						  unsigned int val)
 {
 	struct inv_icm42600_state *st = iio_device_get_drvdata(indio_dev);
-	int ret;
 
-	mutex_lock(&st->lock);
+	guard(mutex)(&st->lock);
 
 	st->fifo.watermark.gyro = val;
-	ret = inv_icm42600_buffer_update_watermark(st);
-
-	mutex_unlock(&st->lock);
-
-	return ret;
+	return inv_icm42600_buffer_update_watermark(st);
 }
 
 static int inv_icm42600_gyro_hwfifo_flush(struct iio_dev *indio_dev,
···
 	if (count == 0)
 		return 0;
 
-	mutex_lock(&st->lock);
+	guard(mutex)(&st->lock);
 
 	ret = inv_icm42600_buffer_hwfifo_flush(st, count);
-	if (!ret)
-		ret = st->fifo.nb.gyro;
+	if (ret)
+		return ret;
 
-	mutex_unlock(&st->lock);
-
-	return ret;
+	return st->fifo.nb.gyro;
 }
 
 static const struct iio_info inv_icm42600_gyro_info = {

drivers/iio/imu/inv_icm42600/inv_icm42600_temp.c

···
 
 exit:
 	mutex_unlock(&st->lock);
-	pm_runtime_mark_last_busy(dev);
 	pm_runtime_put_autosuspend(dev);
 
 	return ret;

drivers/iio/imu/inv_mpu6050/inv_mpu_core.c

···
 		break;
 	}
 
-	pm_runtime_mark_last_busy(pdev);
 	pm_runtime_put_autosuspend(pdev);
 
 	return ret;
···
 		break;
 	}
 
-	pm_runtime_mark_last_busy(pdev);
 	pm_runtime_put_autosuspend(pdev);
 error_write_raw_unlock:
 	mutex_unlock(&st->lock);
···
 			st->chip_config.wom_en = false;
 		}
 
-		pm_runtime_mark_last_busy(pdev);
 		pm_runtime_put_autosuspend(pdev);
 	}
 
 	return result;
 
 error_suspend:
-	pm_runtime_mark_last_busy(pdev);
 	pm_runtime_put_autosuspend(pdev);
 	return result;
 }
···
 	value = (u64)val * 1000000ULL + (u64)val2;
 	result = inv_mpu6050_set_wom_threshold(st, value, INV_MPU6050_FREQ_DIVIDER(st));
 
-	pm_runtime_mark_last_busy(pdev);
 	pm_runtime_put_autosuspend(pdev);
 
 	return result;
···
 	if (result)
 		goto fifo_rate_fail_power_off;
 
-	pm_runtime_mark_last_busy(pdev);
 fifo_rate_fail_power_off:
 	pm_runtime_put_autosuspend(pdev);
 fifo_rate_fail_unlock:

drivers/iio/imu/inv_mpu6050/inv_mpu_trigger.c

···
 		result = inv_mpu6050_prepare_fifo(st, false);
 		if (result)
 			goto error_power_off;
-		pm_runtime_mark_last_busy(pdev);
 		pm_runtime_put_autosuspend(pdev);
 	}
 

drivers/iio/imu/kmx61.c

···
 		data->mag_ps = on;
 	}
 
-	if (on) {
+	if (on)
 		ret = pm_runtime_resume_and_get(&data->client->dev);
-	} else {
-		pm_runtime_mark_last_busy(&data->client->dev);
+	else
 		ret = pm_runtime_put_autosuspend(&data->client->dev);
-	}
 	if (ret < 0) {
 		dev_err(&data->client->dev,
 			"Failed: kmx61_set_power_state for %d, ret %d\n",

drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_core.c

···
 
 	odr_table = &sensor->hw->settings->odr_table[sensor->id];
 	for (i = 0; i < odr_table->odr_len; i++)
-		len += scnprintf(buf + len, PAGE_SIZE - len, "%d.%03d ",
-				 odr_table->odr_avl[i].milli_hz / 1000,
-				 odr_table->odr_avl[i].milli_hz % 1000);
-	buf[len - 1] = '\n';
+	     len += sysfs_emit_at(buf, len, "%d.%03d%c",
+				  odr_table->odr_avl[i].milli_hz / 1000,
+				  odr_table->odr_avl[i].milli_hz % 1000,
+				  (i == odr_table->odr_len - 1) ? '\n' : ' ');
 
 	return len;
 }
···
 
 	fs_table = &hw->settings->fs_table[sensor->id];
 	for (i = 0; i < fs_table->fs_len; i++)
-		len += scnprintf(buf + len, PAGE_SIZE - len, "0.%09u ",
-				 fs_table->fs_avl[i].gain);
-	buf[len - 1] = '\n';
+	     len += sysfs_emit_at(buf, len, "0.%09u%c",
+				  fs_table->fs_avl[i].gain,
+				  (i == fs_table->fs_len - 1) ? '\n' : ' ');
 
 	return len;
 }

drivers/iio/industrialio-core.c

···
 	[IIO_COLORTEMP] = "colortemp",
 	[IIO_CHROMATICITY] = "chromaticity",
 	[IIO_ATTENTION] = "attention",
+	[IIO_ALTCURRENT] = "altcurrent",
 };
 
 static const char * const iio_modifier_names[] = {
···
 	[IIO_MOD_PITCH] = "pitch",
 	[IIO_MOD_YAW] = "yaw",
 	[IIO_MOD_ROLL] = "roll",
+	[IIO_MOD_RMS] = "rms",
+	[IIO_MOD_ACTIVE] = "active",
+	[IIO_MOD_REACTIVE] = "reactive",
+	[IIO_MOD_APPARENT] = "apparent",
 };
 
 /* relies on pairs of these shared then separate */
···
 	[IIO_CHAN_INFO_ZEROPOINT] = "zeropoint",
 	[IIO_CHAN_INFO_TROUGH] = "trough_raw",
 	[IIO_CHAN_INFO_CONVDELAY] = "convdelay",
+	[IIO_CHAN_INFO_POWERFACTOR] = "powerfactor",
 };
 /**
  * iio_device_id() - query the unique ID for the device
···
 
 	switch (type) {
 	case IIO_VAL_INT:
+	case IIO_VAL_CHAR:
 		stride = 1;
 		break;
 	default:
···
 static int iio_device_add_info_mask_type(struct iio_dev *indio_dev,
 					 struct iio_chan_spec const *chan,
 					 enum iio_shared_by shared_by,
-					 const long *infomask)
+					 const unsigned long *infomask)
 {
 	struct iio_dev_opaque *iio_dev_opaque = to_iio_dev_opaque(indio_dev);
 	int i, ret, attrcount = 0;
···
 static int iio_device_add_info_mask_type_avail(struct iio_dev *indio_dev,
 					       struct iio_chan_spec const *chan,
 					       enum iio_shared_by shared_by,
-					       const long *infomask)
+					       const unsigned long *infomask)
 {
 	struct iio_dev_opaque *iio_dev_opaque = to_iio_dev_opaque(indio_dev);
 	int i, ret, attrcount = 0;

drivers/iio/inkern.c

···
 #include <linux/mutex.h>
 #include <linux/property.h>
 #include <linux/slab.h>
+#include <linux/units.h>
 
 #include <linux/iio/iio.h>
 #include <linux/iio/iio-opaque.h>
···
 }
 EXPORT_SYMBOL_GPL(iio_read_channel_average_raw);
 
+int iio_multiply_value(int *result, s64 multiplier,
+		       unsigned int type, int val, int val2)
+{
+	s64 denominator;
+
+	switch (type) {
+	case IIO_VAL_INT:
+		*result = multiplier * val;
+		return IIO_VAL_INT;
+	case IIO_VAL_INT_PLUS_MICRO:
+	case IIO_VAL_INT_PLUS_NANO:
+		switch (type) {
+		case IIO_VAL_INT_PLUS_MICRO:
+			denominator = MICRO;
+			break;
+		case IIO_VAL_INT_PLUS_NANO:
+			denominator = NANO;
+			break;
+		}
+		*result = multiplier * abs(val);
+		*result += div_s64(multiplier * abs(val2), denominator);
+		if (val < 0 || val2 < 0)
+			*result *= -1;
+		return IIO_VAL_INT;
+	case IIO_VAL_FRACTIONAL:
+		*result = div_s64(multiplier * val, val2);
+		return IIO_VAL_INT;
+	case IIO_VAL_FRACTIONAL_LOG2:
+		*result = (multiplier * val) >> val2;
+		return IIO_VAL_INT;
+	default:
+		return -EINVAL;
+	}
+}
+EXPORT_SYMBOL_NS_GPL(iio_multiply_value, "IIO_UNIT_TEST");
+
 static int iio_convert_raw_to_processed_unlocked(struct iio_channel *chan,
 						 int raw, int *processed,
 						 unsigned int scale)
···
 	int scale_type, scale_val, scale_val2;
 	int offset_type, offset_val, offset_val2;
 	s64 raw64 = raw;
+	int ret;
 
 	offset_type = iio_channel_read(chan, &offset_val, &offset_val2,
 				       IIO_CHAN_INFO_OFFSET);
···
 		 * If no channel scaling is available apply consumer scale to
 		 * raw value and return.
 		 */
-		*processed = raw * scale;
+		*processed = raw64 * scale;
 		return 0;
 	}
 
-	switch (scale_type) {
-	case IIO_VAL_INT:
-		*processed = raw64 * scale_val * scale;
-		break;
-	case IIO_VAL_INT_PLUS_MICRO:
-		if (scale_val2 < 0)
-			*processed = -raw64 * scale_val * scale;
-		else
-			*processed = raw64 * scale_val * scale;
-		*processed += div_s64(raw64 * (s64)scale_val2 * scale,
-				      1000000LL);
-		break;
-	case IIO_VAL_INT_PLUS_NANO:
-		if (scale_val2 < 0)
-			*processed = -raw64 * scale_val * scale;
-		else
-			*processed = raw64 * scale_val * scale;
-		*processed += div_s64(raw64 * (s64)scale_val2 * scale,
-				      1000000000LL);
-		break;
-	case IIO_VAL_FRACTIONAL:
-		*processed = div_s64(raw64 * (s64)scale_val * scale,
-				     scale_val2);
-		break;
-	case IIO_VAL_FRACTIONAL_LOG2:
-		*processed = (raw64 * (s64)scale_val * scale) >> scale_val2;
-		break;
-	default:
-		return -EINVAL;
-	}
+	ret = iio_multiply_value(processed, raw64 * scale,
+				 scale_type, scale_val, scale_val2);
+	if (ret < 0)
+		return ret;
 
 	return 0;
 }
···
 				     unsigned int scale)
 {
 	struct iio_dev_opaque *iio_dev_opaque = to_iio_dev_opaque(chan->indio_dev);
-	int ret;
+	int ret, pval, pval2;
 
 	guard(mutex)(&iio_dev_opaque->info_exist_lock);
 	if (!chan->indio_dev->info)
 		return -ENODEV;
 
 	if (iio_channel_has_info(chan->channel, IIO_CHAN_INFO_PROCESSED)) {
-		ret = iio_channel_read(chan, val, NULL,
+		ret = iio_channel_read(chan, &pval, &pval2,
 				       IIO_CHAN_INFO_PROCESSED);
 		if (ret < 0)
 			return ret;
-		*val *= scale;
 
-		return ret;
+		return iio_multiply_value(val, scale, ret, pval, pval2);
 	} else {
 		ret = iio_channel_read(chan, val, NULL, IIO_CHAN_INFO_RAW);
 		if (ret < 0)

drivers/iio/light/Kconfig

···
 	  To compile this driver as a module, choose M here: the
 	  module will be called veml6040.
 
+config VEML6046X00
+	tristate "VEML6046X00 RGBIR color sensor"
+	select REGMAP_I2C
+	select IIO_BUFFER
+	select IIO_TRIGGERED_BUFFER
+	depends on I2C
+	help
+	  Say Y here if you want to build a driver for the Vishay VEML6046X00
+	  high accuracy RGBIR color sensor.
+
+	  To compile this driver as a module, choose M here: the
+	  module will be called veml6046x00.
+
 config VEML6070
 	tristate "VEML6070 UV A light sensor"
 	depends on I2C

drivers/iio/light/Makefile

···
 obj-$(CONFIG_VEML3235)		+= veml3235.o
 obj-$(CONFIG_VEML6030)		+= veml6030.o
 obj-$(CONFIG_VEML6040)		+= veml6040.o
+obj-$(CONFIG_VEML6046X00)	+= veml6046x00.o
 obj-$(CONFIG_VEML6070)		+= veml6070.o
 obj-$(CONFIG_VEML6075)		+= veml6075.o
 obj-$(CONFIG_VL6180)		+= vl6180.o

drivers/iio/light/acpi-als.c

···
 	IIO_CHAN_SOFT_TIMESTAMP(1),
 };
 
-/*
- * The event buffer contains timestamp and all the data from
- * the ACPI0008 block. There are multiple, but so far we only
- * support _ALI (illuminance): One channel, padding and timestamp.
- */
-#define ACPI_ALS_EVT_BUFFER_SIZE		\
-	(sizeof(s32) + sizeof(s32) + sizeof(s64))
-
 struct acpi_als {
 	struct acpi_device	*device;
 	struct mutex		lock;
 	struct iio_trigger	*trig;
-
-	s32 evt_buffer[ACPI_ALS_EVT_BUFFER_SIZE / sizeof(s32)]  __aligned(8);
 };
 
 /*
···
 	struct iio_poll_func *pf = p;
 	struct iio_dev *indio_dev = pf->indio_dev;
 	struct acpi_als *als = iio_priv(indio_dev);
-	s32 *buffer = als->evt_buffer;
+	struct {
+		s32 light;
+		aligned_s64 ts;
+	} scan = { };
 	s32 val;
 	int ret;
 
···
 	ret = acpi_als_read_value(als, ACPI_ALS_ILLUMINANCE, &val);
 	if (ret < 0)
 		goto out;
-	*buffer = val;
+	scan.light = val;
 
 	/*
 	 * When coming from own trigger via polls, set polling function
···
 	if (!pf->timestamp)
 		pf->timestamp = iio_get_time_ns(indio_dev);
 
-	iio_push_to_buffers_with_timestamp(indio_dev, buffer, pf->timestamp);
+	iio_push_to_buffers_with_ts(indio_dev, &scan, sizeof(scan), pf->timestamp);
 out:
 	mutex_unlock(&als->lock);
 	iio_trigger_notify_done(indio_dev->trig);

drivers/iio/light/adjd_s311.c

···
 
 struct adjd_s311_data {
 	struct i2c_client *client;
-	struct {
-		s16 chans[4];
-		aligned_s64 ts;
-	} scan;
 };
 
 enum adjd_s311_channel_idx {
···
 	struct adjd_s311_data *data = iio_priv(indio_dev);
 	s64 time_ns = iio_get_time_ns(indio_dev);
 	int i, j = 0;
+	struct {
+		s16 chans[4];
+		aligned_s64 ts;
+	} scan = { };
 
 	int ret = adjd_s311_req_data(indio_dev);
 	if (ret < 0)
···
 		if (ret < 0)
 			goto done;
 
-		data->scan.chans[j++] = ret & ADJD_S311_DATA_MASK;
+		scan.chans[j++] = ret & ADJD_S311_DATA_MASK;
 	}
 
-	iio_push_to_buffers_with_timestamp(indio_dev, &data->scan, time_ns);
+	iio_push_to_buffers_with_ts(indio_dev, &scan, sizeof(scan), time_ns);
 
 done:
 	iio_trigger_notify_done(indio_dev->trig);

drivers/iio/light/al3000a.c

···
 
 	ret = devm_add_action_or_reset(dev, al3000a_set_pwr_off, data);
 	if (ret)
-		return dev_err_probe(dev, ret, "failed to add action\n");
+		return ret;
 
 	ret = regmap_write(data->regmap, AL3000A_REG_SYSTEM, AL3000A_CONFIG_RESET);
 	if (ret)

drivers/iio/light/apds9306.c

···
 
 	*val = get_unaligned_le24(&buff);
 
-	pm_runtime_mark_last_busy(data->dev);
 	pm_runtime_put_autosuspend(data->dev);
 
 	return 0;
···
 			if (ret)
 				return ret;
 
-			pm_runtime_mark_last_busy(data->dev);
 			pm_runtime_put_autosuspend(data->dev);
 
 			return 0;
···
 
 	ret = devm_add_action_or_reset(dev, apds9306_powerdown, data);
 	if (ret)
-		return dev_err_probe(dev, ret, "failed to add action or reset\n");
+		return ret;
 
 	ret = devm_iio_device_register(dev, indio_dev);
 	if (ret)

drivers/iio/light/apds9960.c

···
 			usleep_range(data->als_adc_int_us,
 				     APDS9960_MAX_INT_TIME_IN_US);
 	} else {
-		pm_runtime_mark_last_busy(dev);
 		ret = pm_runtime_put_autosuspend(dev);
 	}
 

drivers/iio/light/bh1745.c

···
 		scan.chans[j++] = value;
 	}
 
-	iio_push_to_buffers_with_timestamp(indio_dev, &scan,
-					   iio_get_time_ns(indio_dev));
+	iio_push_to_buffers_with_ts(indio_dev, &scan, sizeof(scan),
+				    iio_get_time_ns(indio_dev));
 
 err:
 	iio_trigger_notify_done(indio_dev->trig);
···
 
 	ret = devm_add_action_or_reset(dev, bh1745_power_off, data);
 	if (ret)
-		return dev_err_probe(dev, ret,
-				     "Failed to add action or reset\n");
+		return ret;
 
 	return 0;
 }

drivers/iio/light/bh1780.c

···
 			value = bh1780_read_word(bh1780, BH1780_REG_DLOW);
 			if (value < 0)
 				return value;
-			pm_runtime_mark_last_busy(&bh1780->client->dev);
 			pm_runtime_put_autosuspend(&bh1780->client->dev);
 			*val = value;
 

drivers/iio/light/gp2ap002.c

···
 	}
 
 out:
-	pm_runtime_mark_last_busy(gp2ap002->dev);
 	pm_runtime_put_autosuspend(gp2ap002->dev);
 
 	return ret;
···
 		pm_runtime_get_sync(gp2ap002->dev);
 		gp2ap002->enabled = true;
 	} else {
-		pm_runtime_mark_last_busy(gp2ap002->dev);
 		pm_runtime_put_autosuspend(gp2ap002->dev);
 		gp2ap002->enabled = false;
 	}

drivers/iio/light/hid-sensor-als.c

···
 		if (!als_state->timestamp)
 			als_state->timestamp = iio_get_time_ns(indio_dev);
 
-		iio_push_to_buffers_with_timestamp(indio_dev, &als_state->scan,
-						   als_state->timestamp);
+		iio_push_to_buffers_with_ts(indio_dev, &als_state->scan,
+					    sizeof(als_state->scan),
+					    als_state->timestamp);
 		als_state->timestamp = 0;
 	}
 

drivers/iio/light/isl29028.c

···
 static int isl29028_set_pm_runtime_busy(struct isl29028_chip *chip, bool on)
 {
 	struct device *dev = regmap_get_device(chip->regmap);
-	int ret;
 
-	if (on) {
-		ret = pm_runtime_resume_and_get(dev);
-	} else {
-		pm_runtime_mark_last_busy(dev);
-		ret = pm_runtime_put_autosuspend(dev);
-	}
+	if (on)
+		return pm_runtime_resume_and_get(dev);
 
-	return ret;
+	return pm_runtime_put_autosuspend(dev);
 }
 
 /* Channel IO */

drivers/iio/light/isl29125.c

···
 struct isl29125_data {
 	struct i2c_client *client;
 	u8 conf1;
-	/* Ensure timestamp is naturally aligned */
-	struct {
-		u16 chans[3];
-		aligned_s64 timestamp;
-	} scan;
 };
 
 #define ISL29125_CHANNEL(_color, _si) { \
···
 	struct iio_dev *indio_dev = pf->indio_dev;
 	struct isl29125_data *data = iio_priv(indio_dev);
 	int i, j = 0;
+	/* Ensure timestamp is naturally aligned */
+	struct {
+		u16 chans[3];
+		aligned_s64 timestamp;
+	} scan = { };
 
 	iio_for_each_active_channel(indio_dev, i) {
 		int ret = i2c_smbus_read_word_data(data->client,
···
 		if (ret < 0)
 			goto done;
 
-		data->scan.chans[j++] = ret;
+		scan.chans[j++] = ret;
 	}
 
-	iio_push_to_buffers_with_timestamp(indio_dev, &data->scan,
+	iio_push_to_buffers_with_ts(indio_dev, &scan, sizeof(scan),
 		iio_get_time_ns(indio_dev));
 
 done:

drivers/iio/light/ltr390.c

···
 #include <linux/math.h>
 #include <linux/module.h>
 #include <linux/mutex.h>
+#include <linux/pm_runtime.h>
 #include <linux/regmap.h>
 
 #include <linux/iio/iio.h>
···
 #define LTR390_ALS_UVS_GAIN		0x05
 #define LTR390_PART_ID			0x06
 #define LTR390_MAIN_STATUS		0x07
+
 #define LTR390_ALS_DATA			0x0D
+#define LTR390_ALS_DATA_BYTE(n)		(LTR390_ALS_DATA + (n))
+
 #define LTR390_UVS_DATA			0x10
+#define LTR390_UVS_DATA_BYTE(n)		(LTR390_UVS_DATA + (n))
+
 #define LTR390_INT_CFG			0x19
 #define LTR390_INT_PST			0x1A
+
 #define LTR390_THRESH_UP		0x21
+#define LTR390_THRESH_UP_BYTE(n)	(LTR390_THRESH_UP + (n))
+
 #define LTR390_THRESH_LOW		0x24
+#define LTR390_THRESH_LOW_BYTE(n)	(LTR390_THRESH_LOW + (n))
 
 #define LTR390_PART_NUMBER_ID		0xb
 #define LTR390_ALS_UVS_GAIN_MASK	GENMASK(2, 0)
···
 	enum ltr390_mode mode;
 	int gain;
 	int int_time_us;
+	bool irq_enabled;
+};
+
+static const struct regmap_range ltr390_readable_reg_ranges[] = {
+	regmap_reg_range(LTR390_MAIN_CTRL, LTR390_MAIN_CTRL),
+	regmap_reg_range(LTR390_ALS_UVS_MEAS_RATE, LTR390_MAIN_STATUS),
+	regmap_reg_range(LTR390_ALS_DATA_BYTE(0), LTR390_UVS_DATA_BYTE(2)),
+	regmap_reg_range(LTR390_INT_CFG, LTR390_INT_PST),
+	regmap_reg_range(LTR390_THRESH_UP_BYTE(0), LTR390_THRESH_LOW_BYTE(2)),
+};
+
+static const struct regmap_access_table ltr390_readable_reg_table = {
+	.yes_ranges = ltr390_readable_reg_ranges,
+	.n_yes_ranges = ARRAY_SIZE(ltr390_readable_reg_ranges),
+};
+
+static const struct regmap_range ltr390_writeable_reg_ranges[] = {
+	regmap_reg_range(LTR390_MAIN_CTRL, LTR390_MAIN_CTRL),
+	regmap_reg_range(LTR390_ALS_UVS_MEAS_RATE, LTR390_ALS_UVS_GAIN),
+	regmap_reg_range(LTR390_INT_CFG, LTR390_INT_PST),
+	regmap_reg_range(LTR390_THRESH_UP_BYTE(0), LTR390_THRESH_LOW_BYTE(2)),
+};
+
+static const struct regmap_access_table ltr390_writeable_reg_table = {
+	.yes_ranges = ltr390_writeable_reg_ranges,
+	.n_yes_ranges = ARRAY_SIZE(ltr390_writeable_reg_ranges),
 };
 
 static const struct regmap_config ltr390_regmap_config = {
···
 	.reg_bits = 8,
 	.reg_stride = 1,
 	.val_bits = 8,
+	.max_register = LTR390_THRESH_LOW_BYTE(2),
+	.rd_table = &ltr390_readable_reg_table,
+	.wr_table = &ltr390_writeable_reg_table,
 };
 
 /* Sampling frequency is in mili Hz and mili Seconds */
···
 	return ltr390_samp_freq_table[value][option];
 }
 
-static int ltr390_read_raw(struct iio_dev *iio_device,
-			   struct iio_chan_spec const *chan, int *val,
-			   int *val2, long mask)
+
+static int ltr390_do_read_raw(struct iio_dev *iio_device,
+			      struct iio_chan_spec const *chan, int *val,
+			      int *val2, long mask)
 {
 	int ret;
 	struct ltr390_data *data = iio_priv(iio_device);
···
 	default:
 		return -EINVAL;
 	}
+}
+
+static int ltr390_read_raw(struct iio_dev *iio_device,
+			   struct iio_chan_spec const *chan,
+			   int *val, int *val2, long mask)
+{
+	int ret;
+	struct ltr390_data *data = iio_priv(iio_device);
+	struct device *dev = &data->client->dev;
+
+	ret = pm_runtime_resume_and_get(dev);
+	if (ret < 0) {
+		dev_err(dev, "runtime PM failed to resume: %d\n", ret);
+		return ret;
+	}
+
+	ret = ltr390_do_read_raw(iio_device, chan, val, val2, mask);
+
+	pm_runtime_put_autosuspend(dev);
+
+	return ret;
 }
 
 /* integration time in us */
···
 	return FIELD_GET(LTR390_LS_INT_EN, status);
 }
 
-static int ltr390_write_event_config(struct iio_dev *indio_dev,
-				const struct iio_chan_spec *chan,
-				enum iio_event_type type,
-				enum iio_event_direction dir,
-				bool state)
+static int ltr390_do_event_config(struct iio_dev *indio_dev,
+				  const struct iio_chan_spec *chan,
+				  enum iio_event_type type,
+				  enum iio_event_direction dir,
+				  bool state)
 {
 	struct ltr390_data *data = iio_priv(indio_dev);
 	int ret;
···
 	if (!state)
 		return regmap_clear_bits(data->regmap, LTR390_INT_CFG, LTR390_LS_INT_EN);
 
-	guard(mutex)(&data->lock);
 	ret = regmap_set_bits(data->regmap, LTR390_INT_CFG, LTR390_LS_INT_EN);
 	if (ret < 0)
 		return ret;
···
 	}
 }
 
+static int ltr390_write_event_config(struct iio_dev *indio_dev,
+				     const struct iio_chan_spec *chan,
+				     enum iio_event_type type,
+				     enum iio_event_direction dir,
+				     bool state)
+{
+	int ret;
+	struct ltr390_data *data = iio_priv(indio_dev);
+	struct device *dev = &data->client->dev;
+
+	guard(mutex)(&data->lock);
+
+	if (state && !data->irq_enabled) {
+		ret = pm_runtime_resume_and_get(dev);
+		if (ret < 0) {
+			dev_err(dev, "runtime PM failed to resume: %d\n", ret);
+			return ret;
+		}
+		data->irq_enabled = true;
+	}
+
+	ret = ltr390_do_event_config(indio_dev, chan, type, dir, state);
+
+	if (!state && data->irq_enabled) {
+		data->irq_enabled = false;
+		pm_runtime_put_autosuspend(dev);
+	}
+
+	return ret;
+}
+
+static int ltr390_debugfs_reg_access(struct iio_dev *indio_dev,
+						unsigned int reg, unsigned int writeval,
+						unsigned int *readval)
+{
+	struct ltr390_data *data = iio_priv(indio_dev);
+
+	guard(mutex)(&data->lock);
+
+	if (readval)
+		return regmap_read(data->regmap, reg, readval);
+
+	return regmap_write(data->regmap, reg, writeval);
+}
+
 static const struct iio_info ltr390_info = {
 	.read_raw = ltr390_read_raw,
 	.write_raw = ltr390_write_raw,
···
 	.read_event_config = ltr390_read_event_config,
 	.write_event_value = ltr390_write_event_value,
 	.write_event_config = ltr390_write_event_config,
+	.debugfs_reg_access = ltr390_debugfs_reg_access,
 };
 
 static irqreturn_t ltr390_interrupt_handler(int irq, void *private)
···
 	return IRQ_HANDLED;
 }
 
+static void ltr390_powerdown(void *priv)
+{
+	struct ltr390_data *data = priv;
+	struct device *dev = &data->client->dev;
+	int ret;
+
+	guard(mutex)(&data->lock);
+
+	/* Ensure that power off and interrupts are disabled */
+	if (data->irq_enabled) {
+		ret = regmap_clear_bits(data->regmap, LTR390_INT_CFG, LTR390_LS_INT_EN);
+		if (ret < 0)
+			dev_err(dev, "failed to disable interrupts\n");
+
+		data->irq_enabled = false;
+		pm_runtime_put_autosuspend(dev);
+	}
+
+	ret = regmap_clear_bits(data->regmap, LTR390_MAIN_CTRL, LTR390_SENSOR_ENABLE);
+	if (ret < 0)
+		dev_err(dev, "failed to disable sensor\n");
+}
+
+static int ltr390_pm_init(struct ltr390_data *data)
+{
+	int ret;
+	struct device *dev = &data->client->dev;
+
+	ret = devm_pm_runtime_set_active_enabled(dev);
+	if (ret)
+		return dev_err_probe(dev, ret, "failed to enable runtime PM\n");
+
+	pm_runtime_set_autosuspend_delay(dev, 1000);
+	pm_runtime_use_autosuspend(dev);
+	return 0;
+}
+
 static int ltr390_probe(struct i2c_client *client)
 {
 	struct ltr390_data *data;
···
 	if (!indio_dev)
 		return -ENOMEM;
 
-	data = iio_priv(indio_dev);
+	i2c_set_clientdata(client, indio_dev);
 
+	data = iio_priv(indio_dev);
 	data->regmap = devm_regmap_init_i2c(client, &ltr390_regmap_config);
 	if (IS_ERR(data->regmap))
 		return dev_err_probe(dev, PTR_ERR(data->regmap),
···
 	data->gain = 3;
 	/* default mode for ltr390 is ALS mode */
 	data->mode = LTR390_SET_ALS_MODE;
+	/* default value of irq_enabled is false */
+	data->irq_enabled = false;
 
 	mutex_init(&data->lock);
 
···
 	if (ret)
 		return dev_err_probe(dev, ret, "failed to enable the sensor\n");
 
+	ret = devm_add_action_or_reset(dev, ltr390_powerdown, data);
+	if (ret)
+		return dev_err_probe(dev, ret, "failed to add action or reset\n");
+
 	if (client->irq) {
 		ret = devm_request_threaded_irq(dev, client->irq,
 						NULL, ltr390_interrupt_handler,
···
 			return dev_err_probe(dev, ret,
 					     "request irq (%d) failed\n", client->irq);
 	}
+
+	ret = ltr390_pm_init(data);
+	if (ret)
+		return dev_err_probe(dev, ret, "failed to initialize runtime PM\n");
 
 	return devm_iio_device_register(dev, indio_dev);
 }
···
 				LTR390_SENSOR_ENABLE);
 }
 
-static DEFINE_SIMPLE_DEV_PM_OPS(ltr390_pm_ops, ltr390_suspend, ltr390_resume);
+static int ltr390_runtime_suspend(struct device *dev)
+{
+	struct iio_dev *indio_dev = dev_get_drvdata(dev);
+	struct ltr390_data *data = iio_priv(indio_dev);
+
+	return regmap_clear_bits(data->regmap, LTR390_MAIN_CTRL, LTR390_SENSOR_ENABLE);
+}
+
+static int ltr390_runtime_resume(struct device *dev)
+{
+	struct iio_dev *indio_dev = dev_get_drvdata(dev);
+	struct ltr390_data *data = iio_priv(indio_dev);
+
+	return regmap_set_bits(data->regmap, LTR390_MAIN_CTRL, LTR390_SENSOR_ENABLE);
+}
+
+static const struct dev_pm_ops ltr390_pm_ops = {
+	SYSTEM_SLEEP_PM_OPS(ltr390_suspend, ltr390_resume)
+	RUNTIME_PM_OPS(ltr390_runtime_suspend, ltr390_runtime_resume, NULL)
+};
 
 static const struct i2c_device_id ltr390_id[] = {
 	{ "ltr390" },
···
 	.driver = {
 		.name = "ltr390",
 		.of_match_table = ltr390_of_table,
-		.pm = pm_sleep_ptr(&ltr390_pm_ops),
+		.pm = pm_ptr(&ltr390_pm_ops),
 	},
 	.probe = ltr390_probe,
 	.id_table = ltr390_id,

drivers/iio/light/ltr501.c

···
 		scan.channels[j++] = psdata & LTR501_PS_DATA_MASK;
 	}
 
-	iio_push_to_buffers_with_timestamp(indio_dev, &scan,
-					   iio_get_time_ns(indio_dev));
+	iio_push_to_buffers_with_ts(indio_dev, &scan, sizeof(scan),
+				    iio_get_time_ns(indio_dev));
 
 done:
 	iio_trigger_notify_done(indio_dev->trig);

drivers/iio/light/ltrf216a.c

···
 			return ret;
 		}
 	} else {
-		pm_runtime_mark_last_busy(dev);
 		pm_runtime_put_autosuspend(dev);
 	}
 

drivers/iio/light/max44000.c

···
 struct max44000_data {
 	struct mutex lock;
 	struct regmap *regmap;
-	/* Ensure naturally aligned timestamp */
-	struct {
-		u16 channels[2];
-		aligned_s64 ts;
-	} scan;
 };
 
 /* Default scale is set to the minimum of 0.03125 or 1 / (1 << 5) lux */
···
 	int index = 0;
 	unsigned int regval;
 	int ret;
+	struct {
+		u16 channels[2];
+		aligned_s64 ts;
+	} scan = { };
+
 
 	mutex_lock(&data->lock);
 	if (test_bit(MAX44000_SCAN_INDEX_ALS, indio_dev->active_scan_mask)) {
 		ret = max44000_read_alsval(data);
 		if (ret < 0)
 			goto out_unlock;
-		data->scan.channels[index++] = ret;
+		scan.channels[index++] = ret;
 	}
 	if (test_bit(MAX44000_SCAN_INDEX_PRX, indio_dev->active_scan_mask)) {
 		ret = regmap_read(data->regmap, MAX44000_REG_PRX_DATA, &regval);
 		if (ret < 0)
 			goto out_unlock;
-		data->scan.channels[index] = regval;
+		scan.channels[index] = regval;
 	}
 	mutex_unlock(&data->lock);
 
-	iio_push_to_buffers_with_timestamp(indio_dev, &data->scan,
-					   iio_get_time_ns(indio_dev));
+	iio_push_to_buffers_with_ts(indio_dev, &scan, sizeof(scan),
+				    iio_get_time_ns(indio_dev));
 	iio_trigger_notify_done(indio_dev->trig);
 	return IRQ_HANDLED;
 

drivers/iio/light/opt4001.c

···
 					opt4001_chip_off_action,
 					chip);
 	if (ret < 0)
-		return dev_err_probe(&client->dev, ret,
-				     "Failed to setup power off action\n");
+		return ret;
 
 	return devm_iio_device_register(&client->dev, indio_dev);
 }

drivers/iio/light/opt4060.c

···
 		}
 	}
 
-	iio_push_to_buffers_with_timestamp(idev, &raw, pf->timestamp);
+	iio_push_to_buffers_with_ts(idev, &raw, sizeof(raw), pf->timestamp);
 err_read:
 	iio_trigger_notify_done(idev->trig);
 	return IRQ_HANDLED;
···
 	name = devm_kasprintf(chip->dev, GFP_KERNEL, "%s-opt4060",
 			      dev_name(chip->dev));
 	if (!name)
-		return dev_err_probe(chip->dev, -ENOMEM, "Failed to alloc chip name\n");
+		return -ENOMEM;
 
 	ret = devm_request_threaded_irq(chip->dev, chip->irq, NULL, opt4060_irq_thread,
 					IRQF_TRIGGER_FALLING | IRQF_ONESHOT,
···
 
 	ret = devm_add_action_or_reset(dev, opt4060_chip_off_action, chip);
 	if (ret < 0)
-		return dev_err_probe(dev, ret,
-				     "Failed to setup power off action\n");
+		return ret;
 
 	ret = opt4060_setup_buffer(chip, indio_dev);
 	if (ret)

drivers/iio/light/pa12203001.c

···
 		mutex_unlock(&data->lock);
 	}
 
-	if (on) {
-		ret = pm_runtime_resume_and_get(&data->client->dev);
+	if (on)
+		return pm_runtime_resume_and_get(&data->client->dev);
 
-	} else {
-		pm_runtime_mark_last_busy(&data->client->dev);
-		ret = pm_runtime_put_autosuspend(&data->client->dev);
-	}
-
-	return ret;
+	return pm_runtime_put_autosuspend(&data->client->dev);
 
 err:
 	mutex_unlock(&data->lock);

drivers/iio/light/rohm-bu27034.c

···
 			 */
 			data->scan.mlux = (u32)mlux;
 		}
-		iio_push_to_buffers_with_timestamp(idev, &data->scan, tstamp);
+		iio_push_to_buffers_with_ts(idev, &data->scan,
+					    sizeof(data->scan), tstamp);
 	}
 
 	return 0;

drivers/iio/light/rpr0521.c

···
 	 * Note: If either measurement is re-enabled before _suspend(),
 	 * both stay enabled until _suspend().
 	 */
-	if (on) {
+	if (on)
 		ret = pm_runtime_resume_and_get(&data->client->dev);
-	} else {
-		pm_runtime_mark_last_busy(&data->client->dev);
+	else
 		ret = pm_runtime_put_autosuspend(&data->client->dev);
-	}
 	if (ret < 0) {
 		dev_err(&data->client->dev,
 			"Failed: rpr0521_set_power_state for %d, ret %d\n",
···
 		data->scan.channels,
 		(3 * 2) + 1);	/* 3 * 16-bit + (discarded) int clear reg. */
 	if (!err)
-		iio_push_to_buffers_with_timestamp(indio_dev,
-						   &data->scan, pf->timestamp);
+		iio_push_to_buffers_with_ts(indio_dev, &data->scan,
+					    sizeof(data->scan), pf->timestamp);
 	else
 		dev_err(&data->client->dev,
 			"Trigger consumer can't read from sensor.\n");

drivers/iio/light/si1145.c

···
 			goto done;
 	}
 
-	iio_push_to_buffers_with_timestamp(indio_dev, data->buffer,
-		iio_get_time_ns(indio_dev));
+	iio_push_to_buffers_with_ts(indio_dev, data->buffer,
+				    sizeof(data->buffer),
+				    iio_get_time_ns(indio_dev));
 
 done:
 	iio_trigger_notify_done(indio_dev->trig);

drivers/iio/light/st_uvis25.h

···
 	struct iio_trigger *trig;
 	bool enabled;
 	int irq;
-	/* Ensure timestamp is naturally aligned */
-	struct {
-		u8 chan;
-		aligned_s64 ts;
-	} scan;
 };
 
 extern const struct dev_pm_ops st_uvis25_pm_ops;

drivers/iio/light/st_uvis25_core.c

···
 	struct st_uvis25_hw *hw = iio_priv(iio_dev);
 	unsigned int val;
 	int err;
+	/* Ensure timestamp is naturally aligned */
+	struct {
+		u8 chan;
+		aligned_s64 ts;
+	} scan = { };
+
 
 	err = regmap_read(hw->regmap, ST_UVIS25_REG_OUT_ADDR, &val);
 	if (err < 0)
 		goto out;
 
-	hw->scan.chan = val;
+	scan.chan = val;
 
-	iio_push_to_buffers_with_timestamp(iio_dev, &hw->scan,
-					   iio_get_time_ns(iio_dev));
+	iio_push_to_buffers_with_ts(iio_dev, &scan, sizeof(scan),
+				    iio_get_time_ns(iio_dev));
 
 out:
 	iio_trigger_notify_done(hw->trig);

drivers/iio/light/stk3310.c

···
 	struct stk3310_data *data;
 
 	indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data));
-	if (!indio_dev) {
-		dev_err(&client->dev, "iio allocation failed!\n");
+	if (!indio_dev)
 		return -ENOMEM;
-	}
 
 	data = iio_priv(indio_dev);
 	data->client = client;

drivers/iio/light/tcs3414.c

···
 	u8 control;
 	u8 gain;
 	u8 timing;
-	/* Ensure timestamp is naturally aligned */
-	struct {
-		u16 chans[4];
-		aligned_s64 timestamp;
-	} scan;
 };
 
 #define TCS3414_CHANNEL(_color, _si, _addr) { \
···
 	struct iio_dev *indio_dev = pf->indio_dev;
 	struct tcs3414_data *data = iio_priv(indio_dev);
 	int i, j = 0;
+	/* Ensure timestamp is naturally aligned */
+	struct {
+		u16 chans[4];
+		aligned_s64 timestamp;
+	} scan = { };
+
 
 	iio_for_each_active_channel(indio_dev, i) {
 		int ret = i2c_smbus_read_word_data(data->client,
···
 		if (ret < 0)
 			goto done;
 
-		data->scan.chans[j++] = ret;
+		scan.chans[j++] = ret;
 	}
 
-	iio_push_to_buffers_with_timestamp(indio_dev, &data->scan,
+	iio_push_to_buffers_with_ts(indio_dev, &scan, sizeof(scan),
 		iio_get_time_ns(indio_dev));
 
 done:

drivers/iio/light/tcs3472.c

···
 	u8 control;
 	u8 atime;
 	u8 apers;
-	/* Ensure timestamp is naturally aligned */
-	struct {
-		u16 chans[4];
-		aligned_s64 timestamp;
-	} scan;
 };
 
 static const struct iio_event_spec tcs3472_events[] = {
···
 	struct iio_dev *indio_dev = pf->indio_dev;
 	struct tcs3472_data *data = iio_priv(indio_dev);
 	int i, j = 0;
+	/* Ensure timestamp is naturally aligned */
+	struct {
+		u16 chans[4];
+		aligned_s64 timestamp;
+	} scan = { };
 
 	int ret = tcs3472_req_data(data);
 	if (ret < 0)
···
 		if (ret < 0)
 			goto done;
 
-		data->scan.chans[j++] = ret;
+		scan.chans[j++] = ret;
 	}
 
-	iio_push_to_buffers_with_timestamp(indio_dev, &data->scan,
+	iio_push_to_buffers_with_ts(indio_dev, &scan, sizeof(scan),
 		iio_get_time_ns(indio_dev));
 
 done:

drivers/iio/light/tsl2583.c

···
 
 static int tsl2583_set_pm_runtime_busy(struct tsl2583_chip *chip, bool on)
 {
-	int ret;
+	if (on)
+		return pm_runtime_resume_and_get(&chip->client->dev);
 
-	if (on) {
-		ret = pm_runtime_resume_and_get(&chip->client->dev);
-	} else {
-		pm_runtime_mark_last_busy(&chip->client->dev);
-		ret = pm_runtime_put_autosuspend(&chip->client->dev);
-	}
-
-	return ret;
+	return pm_runtime_put_autosuspend(&chip->client->dev);
 }
 
 static int tsl2583_read_raw(struct iio_dev *indio_dev,

drivers/iio/light/tsl2591.c

···
 err_unlock:
 	mutex_unlock(&chip->als_mutex);
 
-	pm_runtime_mark_last_busy(&client->dev);
 	pm_runtime_put_autosuspend(&client->dev);
 
 	return ret;
···
 		pm_runtime_get_sync(&client->dev);
 	} else if (!state && chip->events_enabled) {
 		chip->events_enabled = false;
-		pm_runtime_mark_last_busy(&client->dev);
 		pm_runtime_put_autosuspend(&client->dev);
 	}
 

drivers/iio/light/us5182d.c

···
 
 static int us5182d_set_power_state(struct us5182d_data *data, bool on)
 {
-	int ret;
-
 	if (data->power_mode == US5182D_ONESHOT)
 		return 0;
 
-	if (on) {
-		ret = pm_runtime_resume_and_get(&data->client->dev);
-	} else {
-		pm_runtime_mark_last_busy(&data->client->dev);
-		ret = pm_runtime_put_autosuspend(&data->client->dev);
-	}
+	if (on)
+		return pm_runtime_resume_and_get(&data->client->dev);
 
-	return ret;
+	return pm_runtime_put_autosuspend(&data->client->dev);
 }
 
 static int us5182d_read_value(struct us5182d_data *data,

drivers/iio/light/vcnl4000.c

···
 static int vcnl4000_set_pm_runtime_state(struct vcnl4000_data *data, bool on)
 {
 	struct device *dev = &data->client->dev;
-	int ret;
 
-	if (on) {
-		ret = pm_runtime_resume_and_get(dev);
-	} else {
-		pm_runtime_mark_last_busy(dev);
-		ret = pm_runtime_put_autosuspend(dev);
-	}
+	if (on)
+		return pm_runtime_resume_and_get(dev);
 
-	return ret;
+	return pm_runtime_put_autosuspend(dev);
 }
 
 static int vcnl4040_read_als_it(struct vcnl4000_data *data, int *val, int *val2)
···
 	struct iio_dev *indio_dev = pf->indio_dev;
 	struct vcnl4000_data *data = iio_priv(indio_dev);
 	const unsigned long *active_scan_mask = indio_dev->active_scan_mask;
-	u16 buffer[8] __aligned(8) = {0}; /* 1x16-bit + naturally aligned ts */
+	struct {
+		u16 chan;
+		aligned_s64 ts;
+	} scan = { };
 	bool data_read = false;
 	unsigned long isr;
 	int val = 0;
···
 			if (ret < 0)
 				goto end;
 
-			buffer[0] = val;
+			scan.chan = val;
 			data_read = true;
 		}
 	}
···
 	if (!data_read)
 		goto end;
 
-	iio_push_to_buffers_with_timestamp(indio_dev, buffer,
-					   iio_get_time_ns(indio_dev));
+	iio_push_to_buffers_with_ts(indio_dev, &scan, sizeof(scan),
+				    iio_get_time_ns(indio_dev));
 
 end:
 	iio_trigger_notify_done(indio_dev->trig);

drivers/iio/light/vcnl4035.c

···
 
 static int vcnl4035_set_pm_runtime_state(struct vcnl4035_data *data, bool on)
 {
-	int ret;
 	struct device *dev = &data->client->dev;
 
-	if (on) {
-		ret = pm_runtime_resume_and_get(dev);
-	} else {
-		pm_runtime_mark_last_busy(dev);
-		ret = pm_runtime_put_autosuspend(dev);
-	}
+	if (on)
+		return pm_runtime_resume_and_get(dev);
 
-	return ret;
+	return pm_runtime_put_autosuspend(dev);
 }
 
 static int vcnl4035_read_info_raw(struct iio_dev *indio_dev,

drivers/iio/light/veml6030.c

···
 		scan.chans[i++] = reg;
 	}
 
-	iio_push_to_buffers_with_timestamp(iio, &scan, pf->timestamp);
+	iio_push_to_buffers_with_ts(iio, &scan, sizeof(scan), pf->timestamp);
 
 done:
 	iio_trigger_notify_done(iio->trig);

drivers/iio/light/veml6040.c

···
 
 	indio_dev = devm_iio_device_alloc(dev, sizeof(*data));
 	if (!indio_dev)
-		return dev_err_probe(dev, -ENOMEM,
-				     "IIO device allocation failed\n");
+		return -ENOMEM;
 
 	regmap = devm_regmap_init_i2c(client, &veml6040_regmap_config);
 	if (IS_ERR(regmap))

drivers/iio/light/veml6046x00.c

···
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * VEML6046X00 High Accuracy RGBIR Color Sensor
+ *
+ * Copyright (c) 2025 Andreas Klinger <[e-mail]>
+ */
+
+#include <linux/array_size.h>
+#include <linux/bitfield.h>
+#include <linux/bits.h>
+#include <linux/dev_printk.h>
+#include <linux/err.h>
+#include <linux/i2c.h>
+#include <linux/interrupt.h>
+#include <linux/module.h>
+#include <linux/mod_devicetable.h>
+#include <linux/pm_runtime.h>
+#include <linux/regmap.h>
+#include <linux/time.h>
+#include <linux/types.h>
+#include <linux/units.h>
+
+#include <asm/byteorder.h>
+
+#include <linux/iio/iio.h>
+#include <linux/iio/trigger_consumer.h>
+#include <linux/iio/triggered_buffer.h>
+
+/*
+ * Device registers
+ * Those which are accessed as bulk io are omitted
+ */
+#define VEML6046X00_REG_CONF0       0x00
+#define VEML6046X00_REG_CONF1       0x01
+#define VEML6046X00_REG_THDH        0x04
+#define VEML6046X00_REG_THDL        0x06
+#define VEML6046X00_REG_R           0x10
+#define VEML6046X00_REG_G           0x12
+#define VEML6046X00_REG_B           0x14
+#define VEML6046X00_REG_IR          0x16
+#define VEML6046X00_REG_ID          0x18
+#define VEML6046X00_REG_INT         0x1A
+#define VEML6046X00_REG_INT_H       0x1B
+
+/* Bit masks for specific functionality */
+#define VEML6046X00_CONF0_ON_0      BIT(0)
+#define VEML6046X00_CONF0_INT       BIT(1)
+#define VEML6046X00_CONF0_AF_TRIG   BIT(2)
+#define VEML6046X00_CONF0_AF        BIT(3)
+#define VEML6046X00_CONF0_IT        GENMASK(6, 4)
+#define VEML6046X00_CONF1_CAL       BIT(0)
+#define VEML6046X00_CONF1_PERS      GENMASK(2, 1)
+#define VEML6046X00_CONF1_GAIN      GENMASK(4, 3)
+#define VEML6046X00_CONF1_PD_D2     BIT(6)
+#define VEML6046X00_CONF1_ON_1      BIT(7)
+#define VEML6046X00_INT_TH_H        BIT(1)
+#define VEML6046X00_INT_TH_L        BIT(2)
+#define VEML6046X00_INT_DRDY        BIT(3)
+#define VEML6046X00_INT_MASK						       \
+	(VEML6046X00_INT_TH_H | VEML6046X00_INT_TH_L | VEML6046X00_INT_DRDY)
+
+#define	VEML6046X00_GAIN_1          0x0
+#define	VEML6046X00_GAIN_2          0x1
+#define	VEML6046X00_GAIN_0_66       0x2
+#define	VEML6046X00_GAIN_0_5        0x3
+
+#define VEML6046X00_PD_2_2          0x0
+#define VEML6046X00_PD_1_2          BIT(6)
+
+/* Autosuspend delay */
+#define VEML6046X00_AUTOSUSPEND_MS  (3 * MSEC_PER_SEC)
+
+enum veml6046x00_scan {
+	VEML6046X00_SCAN_R,
+	VEML6046X00_SCAN_G,
+	VEML6046X00_SCAN_B,
+	VEML6046X00_SCAN_IR,
+	VEML6046X00_SCAN_TIMESTAMP,
+};
+
+/**
+ * struct veml6046x00_rf - Regmap field of configuration registers.
+ * @int_en:	Interrupt enable of green channel.
+ * @mode:	Mode of operation.
+ *		Driver uses always Active force mode.
+ * @trig:	Trigger to be set in active force mode for starting
+ *		measurement.
+ * @it:		Integration time.
+ * @pers:	Persistense - Number of threshold crossing for triggering
+ *		interrupt.
+ */
+struct veml6046x00_rf {
+	struct regmap_field *int_en;
+	struct regmap_field *mode;
+	struct regmap_field *trig;
+	struct regmap_field *it;
+	struct regmap_field *pers;
+};
+
+/**
+ * struct veml6046x00_data - Private data of driver.
+ * @regmap:	Regmap definition of sensor.
+ * @trig:	Industrial-IO trigger.
+ * @rf:		Regmap field of configuration.
+ */
+struct veml6046x00_data {
+	struct regmap *regmap;
+	struct iio_trigger *trig;
+	struct veml6046x00_rf rf;
+};
+
+/**
+ * DOC: Valid integration times (IT)
+ *
+ * static const int veml6046x00_it contains the array with valid IT.
+ *
+ * Register value to be read or written in regmap_field it on veml6046x00 is
+ * identical with array index.
+ * This means there is no separate translation table between valid integration
+ * times and register values needed. The index of the array is identical with
+ * the register value.
+ *
+ * The array is in the form as expected by the callback of the sysfs attribute
+ * integration_time_available (IIO_CHAN_INFO_INT_TIME). So there is no
+ * additional conversion needed.
+ */
+static const int veml6046x00_it[][2] = {
+	{ 0, 3125 },
+	{ 0, 6250 },
+	{ 0, 12500 },
+	{ 0, 25000 },
+	{ 0, 50000 },
+	{ 0, 100000 },
+	{ 0, 200000 },
+	{ 0, 400000 },
+};
+
+/**
+ * DOC: Handling of gain and photodiode size (PD)
+ *
+ * Gains here in the driver are not exactly the same as in the datasheet of the
+ * sensor. The gain in the driver is a combination of the gain of the sensor
+ * with the photodiode size (PD).
+ * The following combinations are possible:
+ *   gain(driver) = gain(sensor) * PD
+ *           0.25 = x0.5  * 1/2
+ *           0.33 = x0.66 * 1/2
+ *           0.5  = x0.5  * 2/2
+ *           0.66 = x0.66 * 2/2
+ *           1    = x1    * 2/2
+ *           2    = x2    * 2/2
+ */
+
+/**
+ * struct veml6046x00_gain_pd - Translation of gain and photodiode size (PD).
+ * @gain_sen:	Gain used in the sensor as described in the datasheet of the
+ *		sensor
+ * @pd:		Photodiode size in the sensor
+ *
+ * This is the translation table from the gain used in the driver (and also used
+ * by the userspace interface in sysfs) to the gain and PD used in the sensor
+ * hardware.
+ *
+ * There are six gain values visible to the user (0.25 .. 2) which translate to
+ * two different gains in the sensor hardware (x0.5 .. x2) and two PD (1/2 and
+ * 2/2). Theoretical are there eight combinations, but gain values 0.5 and 1 are
+ * doubled and therefore the combination with the larger PD (2/2) is taken as
+ * more photodiode cells are supposed to deliver a more precise result.
+ */
+struct veml6046x00_gain_pd {
+	unsigned int gain_sen;
+	unsigned int pd;
+};
+
+static const struct veml6046x00_gain_pd veml6046x00_gain_pd[] = {
+	{ .gain_sen = VEML6046X00_GAIN_0_5, .pd = VEML6046X00_PD_1_2 },
+	{ .gain_sen = VEML6046X00_GAIN_0_66, .pd = VEML6046X00_PD_1_2 },
+	{ .gain_sen = VEML6046X00_GAIN_0_5, .pd = VEML6046X00_PD_2_2 },
+	{ .gain_sen = VEML6046X00_GAIN_0_66, .pd = VEML6046X00_PD_2_2 },
+	{ .gain_sen = VEML6046X00_GAIN_1, .pd = VEML6046X00_PD_2_2 },
+	{ .gain_sen = VEML6046X00_GAIN_2, .pd = VEML6046X00_PD_2_2 },
+};
+
+/**
+ * DOC: Factors for calculation of lux
+ *
+ * static const int veml6046x00_it_gains contains the factors for calculation of
+ * lux.
+ *
+ * Depending on the set up integration time (IT), gain and photodiode size (PD)
+ * the measured raw values are different if the light is constant. As the gain
+ * and PD are already coupled in the driver (see &struct veml6046x00_gain_pd)
+ * there are two dimensions remaining: IT and gain(driver).
+ *
+ * The array of available factors for a certain IT are grouped together in the
+ * same form as expected by the callback of scale_available
+ * (IIO_CHAN_INFO_SCALE).
+ *
+ * Factors for lux / raw count are taken directly from the datasheet.
+ */
+static const int veml6046x00_it_gains[][6][2] = {
+	/* integration time: 3.125 ms */
+	{
+		{ 5, 376000 },	/* gain: x0.25 */
+		{ 4,  72700 },	/* gain: x0.33 */
+		{ 2, 688000 },	/* gain: x0.5 */
+		{ 2,  36400 },	/* gain: x0.66 */
+		{ 1, 344000 },	/* gain: x1 */
+		{ 0, 672000 },	/* gain: x2 */
+	},
+	/* integration time: 6.25 ms */
+	{
+		{ 2, 688000 },	/* gain: x0.25 */
+		{ 2,  36350 },	/* gain: x0.33 */
+		{ 1, 344000 },	/* gain: x0.5 */
+		{ 1,  18200 },	/* gain: x0.66 */
+		{ 0, 672000 },	/* gain: x1 */
+		{ 0, 336000 },	/* gain: x2 */
+	},
+	/* integration time: 12.5 ms */
+	{
+		{ 1, 344000 },	/* gain: x0.25 */
+		{ 1,  18175 },	/* gain: x0.33 */
+		{ 0, 672000 },	/* gain: x0.5 */
+		{ 0, 509100 },	/* gain: x0.66 */
+		{ 0, 336000 },	/* gain: x1 */
+		{ 0, 168000 },	/* gain: x2 */
+	},
+	/* integration time: 25 ms */
+	{
+		{ 0, 672000 },	/* gain: x0.25 */
+		{ 0, 509087 },	/* gain: x0.33 */
+		{ 0, 336000 },	/* gain: x0.5 */
+		{ 0, 254550 },	/* gain: x0.66 */
+		{ 0, 168000 },	/* gain: x1 */
+		{ 0,  84000 },	/* gain: x2 */
+	},
+	/* integration time: 50 ms */
+	{
+		{ 0, 336000 },	/* gain: x0.25 */
+		{ 0, 254543 },	/* gain: x0.33 */
+		{ 0, 168000 },	/* gain: x0.5 */
+		{ 0, 127275 },	/* gain: x0.66 */
+		{ 0,  84000 },	/* gain: x1 */
+		{ 0,  42000 },	/* gain: x2 */
+	},
+	/* integration time: 100 ms */
+	{
+		{ 0, 168000 },	/* gain: x0.25 */
+		{ 0, 127271 },	/* gain: x0.33 */
+		{ 0,  84000 },	/* gain: x0.5 */
+		{ 0,  63637 },	/* gain: x0.66 */
+		{ 0,  42000 },	/* gain: x1 */
+		{ 0,  21000 },	/* gain: x2 */
+	},
+	/* integration time: 200 ms */
+	{
+		{ 0,  84000 },	/* gain: x0.25 */
+		{ 0,  63635 },	/* gain: x0.33 */
+		{ 0,  42000 },	/* gain: x0.5 */
+		{ 0,  31818 },	/* gain: x0.66 */
+		{ 0,  21000 },	/* gain: x1 */
+		{ 0,  10500 },	/* gain: x2 */
+	},
+	/* integration time: 400 ms */
+	{
+		{ 0,  42000 },	/* gain: x0.25 */
+		{ 0,  31817 },	/* gain: x0.33 */
+		{ 0,  21000 },	/* gain: x0.5 */
+		{ 0,  15909 },	/* gain: x0.66 */
+		{ 0,  10500 },	/* gain: x1 */
+		{ 0,   5250 },	/* gain: x2 */
+	},
+};
+
+/*
+ * Two bits (RGB_ON_0 and RGB_ON_1) must be cleared to power on the device.
+ */
+static int veml6046x00_power_on(struct veml6046x00_data *data)
+{
+	int ret;
+	struct device *dev = regmap_get_device(data->regmap);
+
+	ret = regmap_clear_bits(data->regmap, VEML6046X00_REG_CONF0,
+				VEML6046X00_CONF0_ON_0);
+	if (ret) {
+		dev_err(dev, "Failed to set bit for power on %d\n", ret);
+		return ret;
+	}
+
+	return regmap_clear_bits(data->regmap, VEML6046X00_REG_CONF1,
+				 VEML6046X00_CONF1_ON_1);
+}
+
+/*
+ * Two bits (RGB_ON_0 and RGB_ON_1) must be set to power off the device.
+ */
+static int veml6046x00_shutdown(struct veml6046x00_data *data)
+{
+	int ret;
+	struct device *dev = regmap_get_device(data->regmap);
+
+	ret = regmap_set_bits(data->regmap, VEML6046X00_REG_CONF0,
+			      VEML6046X00_CONF0_ON_0);
+	if (ret) {
+		dev_err(dev, "Failed to set bit for shutdown %d\n", ret);
+		return ret;
+	}
+
+	return regmap_set_bits(data->regmap, VEML6046X00_REG_CONF1,
+			       VEML6046X00_CONF1_ON_1);
+}
+
+static void veml6046x00_shutdown_action(void *data)
+{
+	veml6046x00_shutdown(data);
+}
+
+static const struct iio_chan_spec veml6046x00_channels[] = {
+	{
+		.type = IIO_INTENSITY,
+		.address = VEML6046X00_REG_R,
+		.modified = 1,
+		.channel2 = IIO_MOD_LIGHT_RED,
+		.info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
+		.info_mask_shared_by_all = BIT(IIO_CHAN_INFO_INT_TIME) |
+					   BIT(IIO_CHAN_INFO_SCALE),
+		.info_mask_shared_by_all_available = BIT(IIO_CHAN_INFO_INT_TIME) |
+						     BIT(IIO_CHAN_INFO_SCALE),
+		.scan_index = VEML6046X00_SCAN_R,
+		.scan_type = {
+			.sign = 'u',
+			.realbits = 16,
+			.storagebits = 16,
+			.endianness = IIO_LE,
+		},
+	},
+	{
+		.type = IIO_INTENSITY,
+		.address = VEML6046X00_REG_G,
+		.modified = 1,
+		.channel2 = IIO_MOD_LIGHT_GREEN,
+		.info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
+		.info_mask_shared_by_all = BIT(IIO_CHAN_INFO_INT_TIME) |
+					   BIT(IIO_CHAN_INFO_SCALE),
+		.info_mask_shared_by_all_available = BIT(IIO_CHAN_INFO_INT_TIME) |
+						     BIT(IIO_CHAN_INFO_SCALE),
+		.scan_index = VEML6046X00_SCAN_G,
+		.scan_type = {
+			.sign = 'u',
+			.realbits = 16,
+			.storagebits = 16,
+			.endianness = IIO_LE,
+		},
+	},
+	{
+		.type = IIO_INTENSITY,
+		.address = VEML6046X00_REG_B,
+		.modified = 1,
+		.channel2 = IIO_MOD_LIGHT_BLUE,
+		.info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
+		.info_mask_shared_by_all = BIT(IIO_CHAN_INFO_INT_TIME) |
+					   BIT(IIO_CHAN_INFO_SCALE),
+		.info_mask_shared_by_all_available = BIT(IIO_CHAN_INFO_INT_TIME) |
+						     BIT(IIO_CHAN_INFO_SCALE),
+		.scan_index = VEML6046X00_SCAN_B,
+		.scan_type = {
+			.sign = 'u',
+			.realbits = 16,
+			.storagebits = 16,
+			.endianness = IIO_LE,
+		},
+	},
+	{
+		.type = IIO_INTENSITY,
+		.address = VEML6046X00_REG_IR,
+		.modified = 1,
+		.channel2 = IIO_MOD_LIGHT_IR,
+		.info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
+		.info_mask_shared_by_all = BIT(IIO_CHAN_INFO_INT_TIME) |
+					   BIT(IIO_CHAN_INFO_SCALE),
+		.info_mask_shared_by_all_available = BIT(IIO_CHAN_INFO_INT_TIME) |
+						     BIT(IIO_CHAN_INFO_SCALE),
+		.scan_index = VEML6046X00_SCAN_IR,
+		.scan_type = {
+			.sign = 'u',
+			.realbits = 16,
+			.storagebits = 16,
+			.endianness = IIO_LE,
+		},
+	},
+	IIO_CHAN_SOFT_TIMESTAMP(VEML6046X00_SCAN_TIMESTAMP),
+};
+
+static const struct regmap_config veml6046x00_regmap_config = {
+	.name = "veml6046x00_regm",
+	.reg_bits = 8,
+	.val_bits = 8,
+	.max_register = VEML6046X00_REG_INT_H,
+};
+
+static const struct reg_field veml6046x00_rf_int_en =
+	REG_FIELD(VEML6046X00_REG_CONF0, 1, 1);
+
+static const struct reg_field veml6046x00_rf_trig =
+	REG_FIELD(VEML6046X00_REG_CONF0, 2, 2);
+
+static const struct reg_field veml6046x00_rf_mode =
+	REG_FIELD(VEML6046X00_REG_CONF0, 3, 3);
+
+static const struct reg_field veml6046x00_rf_it =
+	REG_FIELD(VEML6046X00_REG_CONF0, 4, 6);
+
+static const struct reg_field veml6046x00_rf_pers =
+	REG_FIELD(VEML6046X00_REG_CONF1, 1, 2);
+
+static int veml6046x00_regfield_init(struct veml6046x00_data *data)
+{
+	struct regmap *regmap = data->regmap;
+	struct device *dev = regmap_get_device(data->regmap);
+	struct regmap_field *rm_field;
+	struct veml6046x00_rf *rf = &data->rf;
+
+	rm_field = devm_regmap_field_alloc(dev, regmap, veml6046x00_rf_int_en);
+	if (IS_ERR(rm_field))
+		return PTR_ERR(rm_field);
+	rf->int_en = rm_field;
+
+	rm_field = devm_regmap_field_alloc(dev, regmap, veml6046x00_rf_mode);
+	if (IS_ERR(rm_field))
+		return PTR_ERR(rm_field);
+	rf->mode = rm_field;
+
+	rm_field = devm_regmap_field_alloc(dev, regmap, veml6046x00_rf_trig);
+	if (IS_ERR(rm_field))
+		return PTR_ERR(rm_field);
+	rf->trig = rm_field;
+
+	rm_field = devm_regmap_field_alloc(dev, regmap, veml6046x00_rf_it);
+	if (IS_ERR(rm_field))
+		return PTR_ERR(rm_field);
+	rf->it = rm_field;
+
+	rm_field = devm_regmap_field_alloc(dev, regmap, veml6046x00_rf_pers);
+	if (IS_ERR(rm_field))
+		return PTR_ERR(rm_field);
+	rf->pers = rm_field;
+
+	return 0;
+}
+
+static int veml6046x00_get_it_index(struct veml6046x00_data *data)
+{
+	int ret;
+	unsigned int reg;
+
+	ret = regmap_field_read(data->rf.it, &reg);
+	if (ret)
+		return ret;
+
+	/* register value is identical with index of array */
+	if (reg >= ARRAY_SIZE(veml6046x00_it))
+		return -EINVAL;
+
+	return reg;
+}
+
+static int veml6046x00_get_it_usec(struct veml6046x00_data *data, unsigned int *it_usec)
+{
+	int ret;
+	unsigned int reg;
+
+	ret = regmap_field_read(data->rf.it, &reg);
+	if (ret)
+		return ret;
+
+	if (reg >= ARRAY_SIZE(veml6046x00_it))
+		return -EINVAL;
+
+	*it_usec = veml6046x00_it[reg][1];
+
+	return IIO_VAL_INT_PLUS_MICRO;
+}
+
+static int veml6046x00_set_it(struct iio_dev *iio, int val, int val2)
+{
+	struct veml6046x00_data *data = iio_priv(iio);
+	unsigned int i;
+
+	for (i = 0; i < ARRAY_SIZE(veml6046x00_it); i++) {
+		if ((veml6046x00_it[i][0] == val) &&
+		    (veml6046x00_it[i][1] == val2))
+			return regmap_field_write(data->rf.it, i);
+	}
+
+	return -EINVAL;
+}
+
+static int veml6046x00_get_val_gain_idx(struct veml6046x00_data *data, int val,
+					int val2)
+{
+	unsigned int i;
+	int it_idx;
+
+	it_idx = veml6046x00_get_it_index(data);
+	if (it_idx < 0)
+		return it_idx;
+
+	for (i = 0; i < ARRAY_SIZE(veml6046x00_it_gains[it_idx]); i++) {
+		if ((veml6046x00_it_gains[it_idx][i][0] == val) &&
+		    (veml6046x00_it_gains[it_idx][i][1] == val2))
+			return i;
+	}
+
+	return -EINVAL;
+}
+
+static int veml6046x00_get_gain_idx(struct veml6046x00_data *data)
+{
+	int ret;
+	unsigned int i, reg, reg_gain, reg_pd;
+
+	ret = regmap_read(data->regmap, VEML6046X00_REG_CONF1, &reg);
+	if (ret)
+		return ret;
+
+	reg_gain = FIELD_GET(VEML6046X00_CONF1_GAIN, reg);
+	reg_pd = reg & VEML6046X00_CONF1_PD_D2;
+
+	for (i = 0; i < ARRAY_SIZE(veml6046x00_gain_pd); i++) {
+		if ((veml6046x00_gain_pd[i].gain_sen == reg_gain) &&
+		    (veml6046x00_gain_pd[i].pd == reg_pd))
+			return i;
+	}
+
+	return -EINVAL;
+}
+
+static int veml6046x00_set_scale(struct iio_dev *iio, int val, int val2)
+{
+	struct veml6046x00_data *data = iio_priv(iio);
+	unsigned int new_scale;
+	int gain_idx;
+
+	gain_idx = veml6046x00_get_val_gain_idx(data, val, val2);
+	if (gain_idx < 0)
+		return gain_idx;
+
+	new_scale = FIELD_PREP(VEML6046X00_CONF1_GAIN,
+			       veml6046x00_gain_pd[gain_idx].gain_sen) |
+			       veml6046x00_gain_pd[gain_idx].pd;
+
+	return regmap_update_bits(data->regmap, VEML6046X00_REG_CONF1,
+				  VEML6046X00_CONF1_GAIN |
+				  VEML6046X00_CONF1_PD_D2,
+				  new_scale);
+}
+
+static int veml6046x00_get_scale(struct veml6046x00_data *data,
+				 int *val, int *val2)
+{
+	int gain_idx, it_idx;
+
+	gain_idx = veml6046x00_get_gain_idx(data);
+	if (gain_idx < 0)
+		return gain_idx;
+
+	it_idx = veml6046x00_get_it_index(data);
+	if (it_idx < 0)
+		return it_idx;
+
+	*val = veml6046x00_it_gains[it_idx][gain_idx][0];
+	*val2 = veml6046x00_it_gains[it_idx][gain_idx][1];
+
+	return IIO_VAL_INT_PLUS_MICRO;
+}
+
+/**
+ * veml6046x00_read_data_ready() - Read data ready bit
+ * @data:	Private data.
+ *
+ * Helper function for reading data ready bit from interrupt register.
+ *
+ * Return:
+ * * %1		- Data is available (AF_DATA_READY is set)
+ * * %0		- No data available
+ * * %-EIO	- Error during bulk read
+ */
+static int veml6046x00_read_data_ready(struct veml6046x00_data *data)
+{
+	struct device *dev = regmap_get_device(data->regmap);
+	int ret;
+	u8 reg[2];
+
+	/*
+	 * Note from the vendor, but not explicitly in the datasheet: we
+	 * should always read both registers together.
+	 */
+	ret = regmap_bulk_read(data->regmap, VEML6046X00_REG_INT,
+			       &reg, sizeof(reg));
+	if (ret) {
+		dev_err(dev, "Failed to read interrupt register %d\n", ret);
+		return -EIO;
+	}
+
+	if (reg[1] & VEML6046X00_INT_DRDY)
+		return 1;
+
+	return 0;
+}
+
+/**
+ * veml6046x00_wait_data_available() - Wait until data is available
+ * @iio:	Industrial IO.
+ * @usecs:	Microseconds to wait for data.
+ *
+ * This function waits for a certain bit in the interrupt register which signals
+ * that there is data to be read available.
+ *
+ * It tries it two times with a waiting time of usecs in between.
+ *
+ * Return:
+ * * %1		- Data is available (AF_DATA_READY is set)
+ * * %0		- Timeout, no data available after usecs timeout
+ * * %-EIO	- Error during bulk read
+ */
+static int veml6046x00_wait_data_available(struct iio_dev *iio, unsigned int usecs)
+{
+	struct veml6046x00_data *data = iio_priv(iio);
+	int ret;
+
+	ret = veml6046x00_read_data_ready(data);
+	if (ret)
+		return ret;
+
+	fsleep(usecs);
+	return veml6046x00_read_data_ready(data);
+}
+
+static int veml6046x00_single_read(struct iio_dev *iio,
+				   enum iio_modifier modifier, int *val)
+{
+	struct veml6046x00_data *data = iio_priv(iio);
+	struct device *dev = regmap_get_device(data->regmap);
+	unsigned int addr, it_usec;
+	int ret;
+	__le16 reg;
+
+	switch (modifier) {
+	case IIO_MOD_LIGHT_RED:
+		addr = VEML6046X00_REG_R;
+		break;
+	case IIO_MOD_LIGHT_GREEN:
+		addr = VEML6046X00_REG_G;
+		break;
+	case IIO_MOD_LIGHT_BLUE:
+		addr = VEML6046X00_REG_B;
+		break;
+	case IIO_MOD_LIGHT_IR:
+		addr = VEML6046X00_REG_IR;
+		break;
+	default:
+		return -EINVAL;
+	}
+	ret = pm_runtime_resume_and_get(dev);
+	if (ret)
+		return ret;
+
+	ret = veml6046x00_get_it_usec(data, &it_usec);
+	if (ret < 0) {
+		dev_err(dev, "Failed to get integration time ret: %d", ret);
+		goto out;
+	}
+
+	ret = regmap_field_write(data->rf.mode, 1);
+	if (ret) {
+		dev_err(dev, "Failed to write mode ret: %d", ret);
+		goto out;
+	}
+
+	ret = regmap_field_write(data->rf.trig, 1);
+	if (ret) {
+		dev_err(dev, "Failed to write trigger ret: %d", ret);
+		goto out;
+	}
+
+	/* integration time + 12.5 % to ensure completion */
+	fsleep(it_usec + it_usec / 8);
+
+	ret = veml6046x00_wait_data_available(iio, it_usec * 4);
+	if (ret < 0)
+		goto out;
+	if (ret == 0) {
+		ret = -EAGAIN;
+		goto out;
+	}
+
+	if (!iio_device_claim_direct(iio)) {
+		ret = -EBUSY;
+		goto out;
+	}
+
+	ret = regmap_bulk_read(data->regmap, addr, &reg, sizeof(reg));
+	iio_device_release_direct(iio);
+	if (ret)
+		goto out;
+
+	*val = le16_to_cpu(reg);
+
+	ret = IIO_VAL_INT;
+
+out:
+	pm_runtime_put_autosuspend(dev);
+
+	return ret;
+}
+
+static int veml6046x00_read_raw(struct iio_dev *iio,
+				struct iio_chan_spec const *chan, int *val,
+				int *val2, long mask)
+{
+	struct veml6046x00_data *data = iio_priv(iio);
+
+	switch (mask) {
+	case IIO_CHAN_INFO_RAW:
+		if (chan->type != IIO_INTENSITY)
+			return -EINVAL;
+		return veml6046x00_single_read(iio, chan->channel2, val);
+	case IIO_CHAN_INFO_INT_TIME:
+		*val = 0;
+		return veml6046x00_get_it_usec(data, val2);
+	case IIO_CHAN_INFO_SCALE:
+		return veml6046x00_get_scale(data, val, val2);
+	default:
+		return -EINVAL;
+	}
+}
+
+static int veml6046x00_read_avail(struct iio_dev *iio,
+				  struct iio_chan_spec const *chan,
+				  const int **vals, int *type, int *length,
+				  long mask)
+{
+	struct veml6046x00_data *data = iio_priv(iio);
+	int it_idx;
+
+	switch (mask) {
+	case IIO_CHAN_INFO_INT_TIME:
+		*vals = (int *)&veml6046x00_it;
+		*length = 2 * ARRAY_SIZE(veml6046x00_it);
+		*type = IIO_VAL_INT_PLUS_MICRO;
+		return IIO_AVAIL_LIST;
+	case IIO_CHAN_INFO_SCALE:
+		it_idx = veml6046x00_get_it_index(data);
+		if (it_idx < 0)
+			return it_idx;
+		*vals = (int *)&veml6046x00_it_gains[it_idx];
+		*length = 2 * ARRAY_SIZE(veml6046x00_it_gains[it_idx]);
+		*type = IIO_VAL_INT_PLUS_MICRO;
+		return IIO_AVAIL_LIST;
+	default:
+		return -EINVAL;
+	}
+}
+
+static int veml6046x00_write_raw(struct iio_dev *iio,
+				 struct iio_chan_spec const *chan,
+				 int val, int val2, long mask)
+{
+	switch (mask) {
+	case IIO_CHAN_INFO_INT_TIME:
+		return veml6046x00_set_it(iio, val, val2);
+	case IIO_CHAN_INFO_SCALE:
+		return veml6046x00_set_scale(iio, val, val2);
+	default:
+		return -EINVAL;
+	}
+}
+
+static const struct iio_info veml6046x00_info_no_irq = {
+	.read_raw = veml6046x00_read_raw,
+	.read_avail = veml6046x00_read_avail,
+	.write_raw = veml6046x00_write_raw,
+};
+
+static int veml6046x00_buffer_preenable(struct iio_dev *iio)
+{
+	struct veml6046x00_data *data = iio_priv(iio);
+	struct device *dev = regmap_get_device(data->regmap);
+	int ret;
+
+	ret = regmap_field_write(data->rf.mode, 0);
+	if (ret) {
+		dev_err(dev, "Failed to set mode %d\n", ret);
+		return ret;
+	}
+
+	ret = regmap_field_write(data->rf.trig, 0);
+	if (ret) {
+		/*
+		 * no unrolling of mode as it is set appropriately with next
+		 * single read.
+		 */
+		dev_err(dev, "Failed to set trigger %d\n", ret);
+		return ret;
+	}
+
+	return pm_runtime_resume_and_get(dev);
+}
+
+static int veml6046x00_buffer_postdisable(struct iio_dev *iio)
+{
+	struct veml6046x00_data *data = iio_priv(iio);
+	struct device *dev = regmap_get_device(data->regmap);
+	int ret;
+
+	ret = regmap_field_write(data->rf.mode, 1);
+	if (ret) {
+		dev_err(dev, "Failed to set mode %d\n", ret);
+		return ret;
+	}
+
+	pm_runtime_put_autosuspend(dev);
+
+	return 0;
+}
+
+static const struct iio_buffer_setup_ops veml6046x00_buffer_setup_ops = {
+	.preenable = veml6046x00_buffer_preenable,
+	.postdisable = veml6046x00_buffer_postdisable,
+};
+
+static irqreturn_t veml6046x00_trig_handler(int irq, void *p)
+{
+	struct iio_poll_func *pf = p;
+	struct iio_dev *iio = pf->indio_dev;
+	struct veml6046x00_data *data = iio_priv(iio);
+	int ret;
+	struct {
+		__le16 chans[4];
+		aligned_s64 timestamp;
+	} scan;
+
+	ret = regmap_bulk_read(data->regmap, VEML6046X00_REG_R,
+			       &scan.chans, sizeof(scan.chans));
+	if (ret)
+		goto done;
+
+	iio_push_to_buffers_with_ts(iio, &scan, sizeof(scan),
+				    iio_get_time_ns(iio));
+
+done:
+	iio_trigger_notify_done(iio->trig);
+
+	return IRQ_HANDLED;
+}
+
+static int veml6046x00_validate_part_id(struct veml6046x00_data *data)
+{
+	struct device *dev = regmap_get_device(data->regmap);
+	unsigned int part_id;
+	int ret;
+	__le16 reg;
+
+	ret = regmap_bulk_read(data->regmap, VEML6046X00_REG_ID,
+			       &reg, sizeof(reg));
+	if (ret)
+		return dev_err_probe(dev, ret, "Failed to read ID\n");
+
+	part_id = le16_to_cpu(reg);
+	if (part_id != 0x01)
+		dev_info(dev, "Unknown ID %#04x\n", part_id);
+
+	return 0;
+}
+
+static int veml6046x00_setup_device(struct iio_dev *iio)
+{
+	struct veml6046x00_data *data = iio_priv(iio);
+	struct device *dev = regmap_get_device(data->regmap);
+	int ret;
+	__le16 reg16;
+
+	reg16 = cpu_to_le16(VEML6046X00_CONF0_AF);
+	ret = regmap_bulk_write(data->regmap, VEML6046X00_REG_CONF0,
+				&reg16, sizeof(reg16));
+	if (ret)
+		return dev_err_probe(dev, ret, "Failed to set configuration\n");
+
+	reg16 = cpu_to_le16(0);
+	ret = regmap_bulk_write(data->regmap, VEML6046X00_REG_THDL,
+				&reg16, sizeof(reg16));
+	if (ret)
+		return dev_err_probe(dev, ret, "Failed to set low threshold\n");
+
+	reg16 = cpu_to_le16(U16_MAX);
+	ret = regmap_bulk_write(data->regmap, VEML6046X00_REG_THDH,
+				&reg16, sizeof(reg16));
+	if (ret)
+		return dev_err_probe(dev, ret, "Failed to set high threshold\n");
+
+	ret = regmap_bulk_read(data->regmap, VEML6046X00_REG_INT,
+			       &reg16, sizeof(reg16));
+	if (ret)
+		return dev_err_probe(dev, ret, "Failed to clear interrupts\n");
+
+	return 0;
+}
+
+static int veml6046x00_probe(struct i2c_client *i2c)
+{
+	struct device *dev = &i2c->dev;
+	struct veml6046x00_data *data;
+	struct iio_dev *iio;
+	struct regmap *regmap;
+	int ret;
+
+	regmap = devm_regmap_init_i2c(i2c, &veml6046x00_regmap_config);
+	if (IS_ERR(regmap))
+		return dev_err_probe(dev, PTR_ERR(regmap), "Failed to set regmap\n");
+
+	iio = devm_iio_device_alloc(dev, sizeof(*data));
+	if (!iio)
+		return -ENOMEM;
+
+	data = iio_priv(iio);
+	/* struct iio_dev is retrieved via dev_get_drvdata(). */
+	i2c_set_clientdata(i2c, iio);
+	data->regmap = regmap;
+
+	ret = veml6046x00_regfield_init(data);
+	if (ret)
+		return dev_err_probe(dev, ret, "Failed to init regfield\n");
+
+	ret = devm_regulator_get_enable(dev, "vdd");
+	if (ret)
+		return dev_err_probe(dev, ret, "Failed to enable regulator\n");
+
+	/* bring device in a known state and switch device on */
+	ret = veml6046x00_setup_device(iio);
+	if (ret < 0)
+		return ret;
+
+	ret = devm_add_action_or_reset(dev, veml6046x00_shutdown_action, data);
+	if (ret < 0)
+		return dev_err_probe(dev, ret, "Failed to add shut down action\n");
+
+	ret = pm_runtime_set_active(dev);
+	if (ret < 0)
+		return dev_err_probe(dev, ret, "Failed to activate PM runtime\n");
+
+	ret = devm_pm_runtime_enable(dev);
+	if (ret)
+		return dev_err_probe(dev, ret, "Failed to enable PM runtime\n");
+
+	pm_runtime_get_noresume(dev);
+	pm_runtime_set_autosuspend_delay(dev, VEML6046X00_AUTOSUSPEND_MS);
+	pm_runtime_use_autosuspend(dev);
+
+	ret = veml6046x00_validate_part_id(data);
+	if (ret)
+		return dev_err_probe(dev, ret, "Failed to validate device ID\n");
+
+	iio->name = "veml6046x00";
+	iio->channels = veml6046x00_channels;
+	iio->num_channels = ARRAY_SIZE(veml6046x00_channels);
+	iio->modes = INDIO_DIRECT_MODE;
+
+	iio->info = &veml6046x00_info_no_irq;
+
+	ret = devm_iio_triggered_buffer_setup(dev, iio, NULL,
+					      veml6046x00_trig_handler,
+					      &veml6046x00_buffer_setup_ops);
+	if (ret)
+		return dev_err_probe(dev, ret,
+				     "Failed to register triggered buffer");
+
+	pm_runtime_put_autosuspend(dev);
+
+	ret = devm_iio_device_register(dev, iio);
+	if (ret)
+		return dev_err_probe(dev, ret, "Failed to register iio device");
+
+	return 0;
+}
+
+static int veml6046x00_runtime_suspend(struct device *dev)
+{
+	struct veml6046x00_data *data = iio_priv(dev_get_drvdata(dev));
+
+	return veml6046x00_shutdown(data);
+}
+
+static int veml6046x00_runtime_resume(struct device *dev)
+{
+	struct veml6046x00_data *data = iio_priv(dev_get_drvdata(dev));
+
+	return veml6046x00_power_on(data);
+}
+
+static DEFINE_RUNTIME_DEV_PM_OPS(veml6046x00_pm_ops,
+				 veml6046x00_runtime_suspend,
+				 veml6046x00_runtime_resume, NULL);
+
+static const struct of_device_id veml6046x00_of_match[] = {
+	{ .compatible = "vishay,veml6046x00" },
+	{ }
+};
+MODULE_DEVICE_TABLE(of, veml6046x00_of_match);
+
+static const struct i2c_device_id veml6046x00_id[] = {
+	{ "veml6046x00" },
+	{ }
+};
+MODULE_DEVICE_TABLE(i2c, veml6046x00_id);
+
+static struct i2c_driver veml6046x00_driver = {
+	.driver = {
+		.name = "veml6046x00",
+		.of_match_table = veml6046x00_of_match,
+		.pm = pm_ptr(&veml6046x00_pm_ops),
+	},
+	.probe = veml6046x00_probe,
+	.id_table = veml6046x00_id,
+};
+module_i2c_driver(veml6046x00_driver);
+
+MODULE_AUTHOR("Andreas Klinger <[e-mail]>");
+MODULE_DESCRIPTION("VEML6046X00 RGBIR Color Sensor");
+MODULE_LICENSE("GPL");

drivers/iio/light/vl6180.c

···
 	unsigned int als_it_ms;
 	unsigned int als_meas_rate;
 	unsigned int range_meas_rate;
-
-	struct {
-		u16 chan[2];
-		aligned_s64 timestamp;
-	} scan;
 };
 
 enum { VL6180_ALS, VL6180_RANGE, VL6180_PROX };
···
 	struct vl6180_data *data = iio_priv(indio_dev);
 	s64 time_ns = iio_get_time_ns(indio_dev);
 	int ret, bit, i = 0;
+	struct {
+		u16 chan[2];
+		aligned_s64 timestamp;
+	} scan = { };
+
 
 	iio_for_each_active_channel(indio_dev, bit) {
 		if (vl6180_chan_regs_table[bit].word)
···
 			return IRQ_HANDLED;
 		}
 
-		data->scan.chan[i++] = ret;
+		scan.chan[i++] = ret;
 	}
 
-	iio_push_to_buffers_with_timestamp(indio_dev, &data->scan, time_ns);
+	iio_push_to_buffers_with_ts(indio_dev, &scan, sizeof(scan), time_ns);
 	iio_trigger_notify_done(indio_dev->trig);
 
 	/* Clear the interrupt flag after data read */
···
 						IRQF_ONESHOT,
 						indio_dev->name, indio_dev);
 		if (ret)
-			return dev_err_probe(&client->dev, ret, "devm_request_irq error \n");
+			return dev_err_probe(&client->dev, ret, "devm_request_irq error\n");
 
 		init_completion(&data->completion);
 

drivers/iio/magnetometer/Kconfig

···
 	select IIO_BUFFER
 	select HID_SENSOR_IIO_COMMON
 	select HID_SENSOR_IIO_TRIGGER
-	tristate "HID Magenetometer 3D"
+	tristate "HID Magnetometer 3D"
 	help
 	  Say yes here to build support for the HID SENSOR
 	  Magnetometer 3D.
···
 
 	  To compile this driver as a module, choose M here. The module
 	  will be called st_magn_spi.
+
+config INFINEON_TLV493D
+	tristate "Infineon TLV493D Low-Power 3D Magnetic Sensor"
+	depends on I2C
+	select IIO_BUFFER
+	select IIO_TRIGGERED_BUFFER
+	help
+	  Say Y here to add support for the Infineon TLV493D-A1B6 Low-
+	  Power 3D Magnetic Sensor.
+
+	  This driver can also be compiled as a module.
+	  To compile this driver as a module, choose M here: the module
+	  will be called tlv493d.
 
 config SENSORS_HMC5843
 	tristate

drivers/iio/magnetometer/Makefile

···
 obj-$(CONFIG_IIO_ST_MAGN_I2C_3AXIS) += st_magn_i2c.o
 obj-$(CONFIG_IIO_ST_MAGN_SPI_3AXIS) += st_magn_spi.o
 
+obj-$(CONFIG_INFINEON_TLV493D)		+= tlv493d.o
+
 obj-$(CONFIG_SENSORS_HMC5843)		+= hmc5843_core.o
 obj-$(CONFIG_SENSORS_HMC5843_I2C)	+= hmc5843_i2c.o
 obj-$(CONFIG_SENSORS_HMC5843_SPI)	+= hmc5843_spi.o

drivers/iio/magnetometer/ak8974.c

···
 	*val = (s16)le16_to_cpu(hw_values[address]);
 out_unlock:
 	mutex_unlock(&ak8974->lock);
-	pm_runtime_mark_last_busy(&ak8974->i2c->dev);
 	pm_runtime_put_autosuspend(&ak8974->i2c->dev);
 
 	return ret;
···
 
  out_unlock:
 	mutex_unlock(&ak8974->lock);
-	pm_runtime_mark_last_busy(&ak8974->i2c->dev);
 	pm_runtime_put_autosuspend(&ak8974->i2c->dev);
 }
 

drivers/iio/magnetometer/ak8975.c

···
 
 	mutex_unlock(&data->lock);
 
-	pm_runtime_mark_last_busy(&data->client->dev);
 	pm_runtime_put_autosuspend(&data->client->dev);
 
 	/* Swap bytes and convert to valid range. */

drivers/iio/magnetometer/als31300.c

···
 	*z = ALS31300_DATA_Z_GET(buf);
 
 out:
-	pm_runtime_mark_last_busy(data->dev);
 	pm_runtime_put_autosuspend(data->dev);
 
 	return ret;
···
 	int ret;
 
 	switch (mask) {
-	case IIO_CHAN_INFO_PROCESSED:
 	case IIO_CHAN_INFO_RAW:
 		ret = als31300_get_measure(data, &t, &x, &y, &z);
 		if (ret)
···
 
 	ret = devm_add_action_or_reset(dev, als31300_power_down, data);
 	if (ret)
-		return dev_err_probe(dev, ret, "failed to add powerdown action\n");
+		return ret;
 
 	indio_dev->info = &als31300_info;
 	indio_dev->modes = INDIO_DIRECT_MODE;
···
 	pm_runtime_set_autosuspend_delay(dev, 200);
 	pm_runtime_use_autosuspend(dev);
 
-	pm_runtime_mark_last_busy(dev);
 	pm_runtime_put_autosuspend(dev);
 
 	ret = devm_iio_device_register(dev, indio_dev);

drivers/iio/magnetometer/bmc150_magn.c

···
 
 static int bmc150_magn_set_power_state(struct bmc150_magn_data *data, bool on)
 {
-#ifdef CONFIG_PM
-	int ret;
+	int ret = 0;
 
-	if (on) {
+	if (on)
 		ret = pm_runtime_resume_and_get(data->dev);
-	} else {
-		pm_runtime_mark_last_busy(data->dev);
-		ret = pm_runtime_put_autosuspend(data->dev);
-	}
-
+	else
+		pm_runtime_put_autosuspend(data->dev);
 	if (ret < 0) {
 		dev_err(data->dev,
 			"failed to change power state to %d\n", on);
 		return ret;
 	}
-#endif
 
 	return 0;
 }

drivers/iio/magnetometer/tlv493d.c

···
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Driver for the Infineon TLV493D Low-Power 3D Magnetic Sensor
+ *
+ * Copyright (C) 2025 Dixit Parmar <[e-mail]>
+ */
+
+#include <linux/array_size.h>
+#include <linux/bits.h>
+#include <linux/bitfield.h>
+#include <linux/cleanup.h>
+#include <linux/delay.h>
+#include <linux/dev_printk.h>
+#include <linux/i2c.h>
+#include <linux/iopoll.h>
+#include <linux/module.h>
+#include <linux/mod_devicetable.h>
+#include <linux/pm.h>
+#include <linux/pm_runtime.h>
+#include <linux/regulator/consumer.h>
+#include <linux/types.h>
+#include <linux/units.h>
+
+#include <linux/iio/buffer.h>
+#include <linux/iio/iio.h>
+#include <linux/iio/trigger_consumer.h>
+#include <linux/iio/triggered_buffer.h>
+
+/*
+ * TLV493D sensor I2C communication note:
+ *
+ * The sensor supports only direct byte-stream write starting from the
+ * register address 0x0. So for any modification to be made to any write
+ * registers, it must be written starting from the register address  0x0.
+ * I2C write operation should not contain the register address in the I2C
+ * frame, it should contain only raw byte stream for the write registers.
+ * I2C Frame: |S|SlaveAddr Wr|Ack|Byte[0]|Ack|Byte[1]|Ack|.....|Sp|
+ *
+ * Same as the write operation, reading from the sensor registers is also
+ * performed starting from the register address 0x0 for as many bytes as
+ * need to be read.
+ * I2C read operation should not contain the register address in the I2C frame.
+ * I2C Frame: |S|SlaveAddr Rd|Ack|Byte[0]|Ack|Byte[1]|Ack|.....|Sp|
+ */
+
+#define TLV493D_RD_REG_BX	0x00
+#define TLV493D_RD_REG_BY	0x01
+#define TLV493D_RD_REG_BZ	0x02
+#define TLV493D_RD_REG_TEMP	0x03
+#define TLV493D_RD_REG_BX2	0x04
+#define TLV493D_RD_REG_BZ2	0x05
+#define TLV493D_RD_REG_TEMP2	0x06
+#define TLV493D_RD_REG_RES1	0x07
+#define TLV493D_RD_REG_RES2	0x08
+#define TLV493D_RD_REG_RES3	0x09
+#define TLV493D_RD_REG_MAX	0x0a
+
+#define TLV493D_WR_REG_MODE1	0x01
+#define TLV493D_WR_REG_MODE2	0x03
+#define TLV493D_WR_REG_MAX	0x04
+
+#define TLV493D_BX_MAG_X_AXIS_MSB	GENMASK(7, 0)
+#define TLV493D_BX2_MAG_X_AXIS_LSB	GENMASK(7, 4)
+#define TLV493D_BY_MAG_Y_AXIS_MSB	GENMASK(7, 0)
+#define TLV493D_BX2_MAG_Y_AXIS_LSB	GENMASK(3, 0)
+#define TLV493D_BZ_MAG_Z_AXIS_MSB	GENMASK(7, 0)
+#define TLV493D_BZ2_MAG_Z_AXIS_LSB	GENMASK(3, 0)
+#define TLV493D_TEMP_TEMP_MSB		GENMASK(7, 4)
+#define TLV493D_TEMP2_TEMP_LSB		GENMASK(7, 0)
+#define TLV493D_TEMP_CHANNEL		GENMASK(1, 0)
+#define TLV493D_MODE1_MOD_LOWFAST	GENMASK(1, 0)
+#define TLV493D_MODE2_LP_PERIOD	BIT(6)
+#define TLV493D_RD_REG_RES1_WR_MASK	GENMASK(4, 3)
+#define TLV493D_RD_REG_RES2_WR_MASK	GENMASK(7, 0)
+#define TLV493D_RD_REG_RES3_WR_MASK	GENMASK(4, 0)
+
+enum tlv493d_channels {
+	TLV493D_AXIS_X,
+	TLV493D_AXIS_Y,
+	TLV493D_AXIS_Z,
+	TLV493D_TEMPERATURE,
+};
+
+enum tlv493d_op_mode {
+	TLV493D_OP_MODE_POWERDOWN,
+	TLV493D_OP_MODE_FAST,
+	TLV493D_OP_MODE_LOWPOWER,
+	TLV493D_OP_MODE_ULTRA_LOWPOWER,
+	TLV493D_OP_MODE_MASTERCONTROLLED,
+};
+
+struct tlv493d_data {
+	struct i2c_client *client;
+	/* protects from simultaneous sensor access and register readings */
+	struct mutex lock;
+	enum tlv493d_op_mode mode;
+	u8 wr_regs[TLV493D_WR_REG_MAX];
+};
+
+/*
+ * Different mode has different measurement sampling time, this time is
+ * used in deriving the sleep and timeout while reading the data from
+ * sensor in polling.
+ * Power-down mode: No measurement.
+ * Fast mode: Freq:3.3 KHz. Measurement time:305 usec.
+ * Low-power mode: Freq:100 Hz. Measurement time:10 msec.
+ * Ultra low-power mode: Freq:10 Hz. Measurement time:100 msec.
+ * Master controlled mode: Freq:3.3 Khz. Measurement time:305 usec.
+ */
+static const u32 tlv493d_sample_rate_us[] = {
+	[TLV493D_OP_MODE_POWERDOWN] = 0,
+	[TLV493D_OP_MODE_FAST] = 305,
+	[TLV493D_OP_MODE_LOWPOWER] = 10 * USEC_PER_MSEC,
+	[TLV493D_OP_MODE_ULTRA_LOWPOWER] = 100 * USEC_PER_MSEC,
+	[TLV493D_OP_MODE_MASTERCONTROLLED] = 305,
+};
+
+static int tlv493d_write_all_regs(struct tlv493d_data *data)
+{
+	int ret;
+	struct device *dev = &data->client->dev;
+
+	ret = i2c_master_send(data->client, data->wr_regs, ARRAY_SIZE(data->wr_regs));
+	if (ret < 0) {
+		dev_err(dev, "i2c write registers failed, error: %d\n", ret);
+		return ret;
+	}
+
+	return 0;
+}
+
+static int tlv493d_set_operating_mode(struct tlv493d_data *data, enum tlv493d_op_mode mode)
+{
+	u8 *mode1_cfg = &data->wr_regs[TLV493D_WR_REG_MODE1];
+	u8 *mode2_cfg = &data->wr_regs[TLV493D_WR_REG_MODE2];
+
+	switch (mode) {
+	case TLV493D_OP_MODE_POWERDOWN:
+		FIELD_MODIFY(TLV493D_MODE1_MOD_LOWFAST, mode1_cfg, 0);
+		FIELD_MODIFY(TLV493D_MODE2_LP_PERIOD, mode2_cfg, 0);
+		break;
+
+	case TLV493D_OP_MODE_FAST:
+		FIELD_MODIFY(TLV493D_MODE1_MOD_LOWFAST, mode1_cfg, 1);
+		FIELD_MODIFY(TLV493D_MODE2_LP_PERIOD, mode2_cfg, 0);
+		break;
+
+	case TLV493D_OP_MODE_LOWPOWER:
+		FIELD_MODIFY(TLV493D_MODE1_MOD_LOWFAST, mode1_cfg, 2);
+		FIELD_MODIFY(TLV493D_MODE2_LP_PERIOD, mode2_cfg, 1);
+		break;
+
+	case TLV493D_OP_MODE_ULTRA_LOWPOWER:
+		FIELD_MODIFY(TLV493D_MODE1_MOD_LOWFAST, mode1_cfg, 2);
+		FIELD_MODIFY(TLV493D_MODE2_LP_PERIOD, mode2_cfg, 0);
+		break;
+
+	case TLV493D_OP_MODE_MASTERCONTROLLED:
+		FIELD_MODIFY(TLV493D_MODE1_MOD_LOWFAST, mode1_cfg, 3);
+		FIELD_MODIFY(TLV493D_MODE2_LP_PERIOD, mode2_cfg, 0);
+		break;
+	}
+
+	return tlv493d_write_all_regs(data);
+}
+
+static s16 tlv493d_get_channel_data(u8 *b, enum tlv493d_channels ch)
+{
+	u16 val;
+
+	switch (ch) {
+	case TLV493D_AXIS_X:
+		val = FIELD_GET(TLV493D_BX_MAG_X_AXIS_MSB, b[TLV493D_RD_REG_BX]) << 4 |
+		      FIELD_GET(TLV493D_BX2_MAG_X_AXIS_LSB, b[TLV493D_RD_REG_BX2]) >> 4;
+		break;
+	case TLV493D_AXIS_Y:
+		val = FIELD_GET(TLV493D_BY_MAG_Y_AXIS_MSB, b[TLV493D_RD_REG_BY]) << 4 |
+		      FIELD_GET(TLV493D_BX2_MAG_Y_AXIS_LSB, b[TLV493D_RD_REG_BX2]);
+		break;
+	case TLV493D_AXIS_Z:
+		val = FIELD_GET(TLV493D_BZ_MAG_Z_AXIS_MSB, b[TLV493D_RD_REG_BZ]) << 4 |
+		      FIELD_GET(TLV493D_BZ2_MAG_Z_AXIS_LSB, b[TLV493D_RD_REG_BZ2]);
+		break;
+	case TLV493D_TEMPERATURE:
+		val = FIELD_GET(TLV493D_TEMP_TEMP_MSB, b[TLV493D_RD_REG_TEMP]) << 8 |
+		      FIELD_GET(TLV493D_TEMP2_TEMP_LSB, b[TLV493D_RD_REG_TEMP2]);
+		break;
+	}
+
+	return sign_extend32(val, 11);
+}
+
+static int tlv493d_get_measurements(struct tlv493d_data *data, s16 *x, s16 *y,
+				    s16 *z, s16 *t)
+{
+	u8 buff[7] = {};
+	int err, ret;
+	struct device *dev = &data->client->dev;
+	u32 sleep_us = tlv493d_sample_rate_us[data->mode];
+
+	guard(mutex)(&data->lock);
+
+	ret = pm_runtime_resume_and_get(dev);
+	if (ret < 0)
+		return ret;
+
+	/*
+	 * Poll until data is valid.
+	 * For a valid data TLV493D_TEMP_CHANNEL bit of TLV493D_RD_REG_TEMP
+	 * should be set to 0. The sampling time depends on the sensor mode.
+	 * Poll 3x the time of the sampling time.
+	 */
+	ret = read_poll_timeout(i2c_master_recv, err,
+			err || !FIELD_GET(TLV493D_TEMP_CHANNEL, buff[TLV493D_RD_REG_TEMP]),
+			sleep_us, 3 * sleep_us, false, data->client, buff,
+			ARRAY_SIZE(buff));
+	if (ret) {
+		dev_err(dev, "i2c read poll timeout, error:%d\n", ret);
+		goto out_put_autosuspend;
+	}
+	if (err < 0) {
+		dev_err(dev, "i2c read data failed, error:%d\n", err);
+		ret = err;
+		goto out_put_autosuspend;
+	}
+
+	*x = tlv493d_get_channel_data(buff, TLV493D_AXIS_X);
+	*y = tlv493d_get_channel_data(buff, TLV493D_AXIS_Y);
+	*z = tlv493d_get_channel_data(buff, TLV493D_AXIS_Z);
+	*t = tlv493d_get_channel_data(buff, TLV493D_TEMPERATURE);
+
+out_put_autosuspend:
+	pm_runtime_put_autosuspend(dev);
+	return ret;
+}
+
+static int tlv493d_init(struct tlv493d_data *data)
+{
+	int ret;
+	u8 buff[TLV493D_RD_REG_MAX];
+	struct device *dev = &data->client->dev;
+
+	/*
+	 * The sensor initialization requires below steps to be followed,
+	 * 1. Power-up sensor.
+	 * 2. Read and store read-registers map (0x0-0x9).
+	 * 3. Copy values from read reserved registers to write reserved fields
+	 *    (0x0-0x3).
+	 * 4. Set operating mode.
+	 * 5. Write to all registers.
+	 */
+	ret = i2c_master_recv(data->client, buff, ARRAY_SIZE(buff));
+	if (ret < 0)
+		return dev_err_probe(dev, ret, "i2c read failed\n");
+
+	/* Write register 0x0 is reserved. Does not require to be updated.*/
+	data->wr_regs[0] = 0;
+	data->wr_regs[1] = buff[TLV493D_RD_REG_RES1] & TLV493D_RD_REG_RES1_WR_MASK;
+	data->wr_regs[2] = buff[TLV493D_RD_REG_RES2] & TLV493D_RD_REG_RES2_WR_MASK;
+	data->wr_regs[3] = buff[TLV493D_RD_REG_RES3] & TLV493D_RD_REG_RES3_WR_MASK;
+
+	ret = tlv493d_set_operating_mode(data, data->mode);
+	if (ret < 0)
+		return dev_err_probe(dev, ret, "failed to set operating mode\n");
+
+	return 0;
+}
+
+static int tlv493d_read_raw(struct iio_dev *indio_dev,
+			const struct iio_chan_spec *chan, int *val,
+			int *val2, long mask)
+{
+	struct tlv493d_data *data = iio_priv(indio_dev);
+	s16 x, y, z, t;
+	int ret;
+
+	switch (mask) {
+	case IIO_CHAN_INFO_RAW:
+		ret = tlv493d_get_measurements(data, &x, &y, &z, &t);
+		if (ret)
+			return ret;
+
+		switch (chan->address) {
+		case TLV493D_AXIS_X:
+			*val = x;
+			return IIO_VAL_INT;
+		case TLV493D_AXIS_Y:
+			*val = y;
+			return IIO_VAL_INT;
+		case TLV493D_AXIS_Z:
+			*val = z;
+			return IIO_VAL_INT;
+		case TLV493D_TEMPERATURE:
+			*val = t;
+			return IIO_VAL_INT;
+		default:
+			return -EINVAL;
+		}
+	case IIO_CHAN_INFO_SCALE:
+		switch (chan->type) {
+		case IIO_MAGN:
+			/*
+			 * Magnetic field scale: 0.0098 mTesla (i.e. 9.8 µT)
+			 * Magnetic field in Gauss: mT * 10 = 0.098.
+			 */
+			*val = 98;
+			*val2 = 1000;
+			return IIO_VAL_FRACTIONAL;
+		case IIO_TEMP:
+			/*
+			 * Temperature scale: 1.1 °C per LSB, expressed as 1100 m°C
+			 * Returned as integer for IIO core to apply:
+			 * temp = (raw + offset) * scale
+			 */
+			*val = 1100;
+			return IIO_VAL_INT;
+		default:
+			return -EINVAL;
+		}
+	case IIO_CHAN_INFO_OFFSET:
+		switch (chan->type) {
+		case IIO_TEMP:
+			/*
+			 * Temperature offset includes sensor-specific raw offset
+			 * plus compensation for +25°C bias in formula.
+			 * offset = -raw_offset + (25000 / 1100)
+			 * -340 + 22.72 = -317.28
+			 */
+			*val = -31728;
+			*val2 = 100;
+			return IIO_VAL_FRACTIONAL;
+		default:
+			return -EINVAL;
+		}
+	default:
+		return -EINVAL;
+	}
+}
+
+static irqreturn_t tlv493d_trigger_handler(int irq, void *ptr)
+{
+	int ret;
+	s16 x, y, z, t;
+	struct iio_poll_func *pf = ptr;
+	struct iio_dev *indio_dev = pf->indio_dev;
+	struct tlv493d_data *data = iio_priv(indio_dev);
+	struct device *dev = &data->client->dev;
+	struct {
+		s16 channels[3];
+		s16 temperature;
+		aligned_s64 timestamp;
+	} scan;
+
+	ret = tlv493d_get_measurements(data, &x, &y, &z, &t);
+	if (ret) {
+		dev_err(dev, "failed to read sensor data\n");
+		goto out_trigger_notify;
+	}
+
+	scan.channels[0] = x;
+	scan.channels[1] = y;
+	scan.channels[2] = z;
+	scan.temperature = t;
+	iio_push_to_buffers_with_ts(indio_dev, &scan, sizeof(scan), pf->timestamp);
+
+out_trigger_notify:
+	iio_trigger_notify_done(indio_dev->trig);
+
+	return IRQ_HANDLED;
+}
+
+#define TLV493D_AXIS_CHANNEL(axis, index)			\
+	{							\
+		.type = IIO_MAGN,				\
+		.modified = 1,					\
+		.channel2 = IIO_MOD_##axis,			\
+		.info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |	\
+				BIT(IIO_CHAN_INFO_SCALE),	\
+		.address = index,				\
+		.scan_index = index,				\
+		.scan_type = {					\
+			.sign = 's',				\
+			.realbits = 12,				\
+			.storagebits = 16,			\
+			.endianness = IIO_CPU,			\
+		},						\
+	}
+
+static const struct iio_chan_spec tlv493d_channels[] = {
+	TLV493D_AXIS_CHANNEL(X, TLV493D_AXIS_X),
+	TLV493D_AXIS_CHANNEL(Y, TLV493D_AXIS_Y),
+	TLV493D_AXIS_CHANNEL(Z, TLV493D_AXIS_Z),
+	{
+		.type = IIO_TEMP,
+		.info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |
+				BIT(IIO_CHAN_INFO_SCALE) |
+				BIT(IIO_CHAN_INFO_OFFSET),
+		.address = TLV493D_TEMPERATURE,
+		.scan_index = TLV493D_TEMPERATURE,
+		.scan_type = {
+			.sign = 's',
+			.realbits = 12,
+			.storagebits = 16,
+			.endianness = IIO_CPU,
+		},
+	},
+	IIO_CHAN_SOFT_TIMESTAMP(4),
+};
+
+static const struct iio_info tlv493d_info = {
+	.read_raw = tlv493d_read_raw,
+};
+
+static const unsigned long tlv493d_scan_masks[] = { GENMASK(3, 0), 0 };
+
+static int tlv493d_probe(struct i2c_client *client)
+{
+	struct device *dev = &client->dev;
+	struct iio_dev *indio_dev;
+	struct tlv493d_data *data;
+	int ret;
+
+	indio_dev = devm_iio_device_alloc(dev, sizeof(*data));
+	if (!indio_dev)
+		return -ENOMEM;
+
+	data = iio_priv(indio_dev);
+	data->client = client;
+	i2c_set_clientdata(client, indio_dev);
+
+	ret = devm_mutex_init(dev, &data->lock);
+	if (ret)
+		return ret;
+
+	ret = devm_regulator_get_enable(dev, "vdd");
+	if (ret)
+		return dev_err_probe(dev, ret, "failed to enable regulator\n");
+
+	/*
+	 * Setting Sensor default operating mode to Master-Controlled mode since
+	 * it performs measurement cycle only on-request and stays in Power-Down
+	 * state until next cycle is initiated.
+	 */
+	data->mode = TLV493D_OP_MODE_MASTERCONTROLLED;
+	ret = tlv493d_init(data);
+	if (ret)
+		return dev_err_probe(dev, ret, "failed to initialize\n");
+
+	indio_dev->info = &tlv493d_info;
+	indio_dev->modes = INDIO_DIRECT_MODE;
+	indio_dev->name = client->name;
+	indio_dev->channels = tlv493d_channels;
+	indio_dev->num_channels = ARRAY_SIZE(tlv493d_channels);
+	indio_dev->available_scan_masks = tlv493d_scan_masks;
+
+	ret = devm_iio_triggered_buffer_setup(dev, indio_dev,
+					      iio_pollfunc_store_time,
+					      tlv493d_trigger_handler,
+					      NULL);
+	if (ret)
+		return dev_err_probe(dev, ret, "iio triggered buffer setup failed\n");
+
+	ret = pm_runtime_set_active(dev);
+	if (ret)
+		return ret;
+
+	ret = devm_pm_runtime_enable(dev);
+	if (ret)
+		return ret;
+
+	pm_runtime_get_noresume(dev);
+	pm_runtime_set_autosuspend_delay(dev, 500);
+	pm_runtime_use_autosuspend(dev);
+
+	pm_runtime_put_autosuspend(dev);
+
+	ret = devm_iio_device_register(dev, indio_dev);
+	if (ret)
+		return dev_err_probe(dev, ret, "iio device register failed\n");
+
+	return 0;
+}
+
+static int tlv493d_runtime_suspend(struct device *dev)
+{
+	struct tlv493d_data *data = iio_priv(dev_get_drvdata(dev));
+
+	return tlv493d_set_operating_mode(data, TLV493D_OP_MODE_POWERDOWN);
+}
+
+static int tlv493d_runtime_resume(struct device *dev)
+{
+	struct tlv493d_data *data = iio_priv(dev_get_drvdata(dev));
+
+	return tlv493d_set_operating_mode(data, data->mode);
+}
+
+static DEFINE_RUNTIME_DEV_PM_OPS(tlv493d_pm_ops, tlv493d_runtime_suspend,
+				 tlv493d_runtime_resume, NULL);
+
+static const struct i2c_device_id tlv493d_id[] = {
+	{ "tlv493d" },
+	{ }
+};
+MODULE_DEVICE_TABLE(i2c, tlv493d_id);
+
+static const struct of_device_id tlv493d_of_match[] = {
+	{ .compatible = "infineon,tlv493d-a1b6" },
+	{ }
+};
+MODULE_DEVICE_TABLE(of, tlv493d_of_match);
+
+static struct i2c_driver tlv493d_driver = {
+	.driver = {
+		.name = "tlv493d",
+		.of_match_table = tlv493d_of_match,
+		.pm = pm_ptr(&tlv493d_pm_ops),
+	},
+	.probe = tlv493d_probe,
+	.id_table = tlv493d_id,
+};
+module_i2c_driver(tlv493d_driver);
+
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("Infineon TLV493D Low-Power 3D Magnetic Sensor");
+MODULE_AUTHOR("Dixit Parmar <[e-mail]>");

drivers/iio/magnetometer/tmag5273.c

···
 	int ret;
 
 	switch (mask) {
-	case IIO_CHAN_INFO_PROCESSED:
 	case IIO_CHAN_INFO_RAW:
 		ret = pm_runtime_resume_and_get(data->dev);
 		if (ret < 0)
···
 
 		ret = tmag5273_get_measure(data, &t, &x, &y, &z, &angle, &magnitude);
 
-		pm_runtime_mark_last_busy(data->dev);
 		pm_runtime_put_autosuspend(data->dev);
 
 		if (ret)
···
 	 */
 	ret = devm_add_action_or_reset(dev, tmag5273_power_down, data);
 	if (ret)
-		return dev_err_probe(dev, ret, "failed to add powerdown action\n");
+		return ret;
 
 	ret = pm_runtime_set_active(dev);
 	if (ret < 0)
···
 	indio_dev->channels = tmag5273_channels;
 	indio_dev->num_channels = ARRAY_SIZE(tmag5273_channels);
 
-	pm_runtime_mark_last_busy(dev);
 	pm_runtime_put_autosuspend(dev);
 
 	ret = devm_iio_device_register(dev, indio_dev);

drivers/iio/magnetometer/yamaha-yas530.c

···
 	case IIO_CHAN_INFO_RAW:
 		pm_runtime_get_sync(yas5xx->dev);
 		ret = ci->get_measure(yas5xx, &t, &x, &y, &z);
-		pm_runtime_mark_last_busy(yas5xx->dev);
 		pm_runtime_put_autosuspend(yas5xx->dev);
 		if (ret)
 			return ret;
···
 
 	pm_runtime_get_sync(yas5xx->dev);
 	ret = ci->get_measure(yas5xx, &t, &x, &y, &z);
-	pm_runtime_mark_last_busy(yas5xx->dev);
 	pm_runtime_put_autosuspend(yas5xx->dev);
 	if (ret) {
 		dev_err(yas5xx->dev, "error refilling buffer\n");

drivers/iio/potentiostat/lmp91000.c

···
 	data->trig = devm_iio_trigger_alloc(dev, "%s-mux%d",
 					    indio_dev->name,
 					    iio_device_id(indio_dev));
-	if (!data->trig) {
-		dev_err(dev, "cannot allocate iio trigger.\n");
+	if (!data->trig)
 		return -ENOMEM;
-	}
 
 	init_completion(&data->completion);
 

drivers/iio/pressure/bmp280-core.c

···
 
 	pm_runtime_get_sync(data->dev);
 	ret = bmp280_read_raw_impl(indio_dev, chan, val, val2, mask);
-	pm_runtime_mark_last_busy(data->dev);
 	pm_runtime_put_autosuspend(data->dev);
 
 	return ret;
···
 
 	pm_runtime_get_sync(data->dev);
 	ret = bmp280_write_raw_impl(indio_dev, chan, val, val2, mask);
-	pm_runtime_mark_last_busy(data->dev);
 	pm_runtime_put_autosuspend(data->dev);
 
 	return ret;
···
 
 	pm_runtime_get_sync(data->dev);
 	ret = bmp580_nvmem_read_impl(priv, offset, val, bytes);
-	pm_runtime_mark_last_busy(data->dev);
 	pm_runtime_put_autosuspend(data->dev);
 
 	return ret;
···
 
 	pm_runtime_get_sync(data->dev);
 	ret = bmp580_nvmem_write_impl(priv, offset, val, bytes);
-	pm_runtime_mark_last_busy(data->dev);
 	pm_runtime_put_autosuspend(data->dev);
 
 	return ret;
···
 {
 	struct bmp280_data *data = iio_priv(indio_dev);
 
-	pm_runtime_mark_last_busy(data->dev);
 	pm_runtime_put_autosuspend(data->dev);
 
 	return 0;
···
 		return dev_err_probe(dev, PTR_ERR(gpiod), "failed to get reset GPIO\n");
 
 	/* Deassert the signal */
-	dev_info(dev, "release reset\n");
-	gpiod_set_value(gpiod, 0);
+	gpiod_set_value_cansleep(gpiod, 0);
 
 	data->regmap = regmap;
 

drivers/iio/pressure/dlhl60d.c

···
 	}
 
 	indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*st));
-	if (!indio_dev) {
-		dev_err(&client->dev, "failed to allocate iio device\n");
+	if (!indio_dev)
 		return -ENOMEM;
-	}
 
 	i2c_set_clientdata(client, indio_dev);
 

drivers/iio/pressure/icp10100.c

···
 			(be16_to_cpu(measures[1]) >> 8);
 	*temperature = be16_to_cpu(measures[2]);
 
-	pm_runtime_mark_last_busy(&st->client->dev);
 error_measure:
 	pm_runtime_put_autosuspend(&st->client->dev);
 	return ret;

drivers/iio/pressure/mpl115.c

···
 		ret = mpl115_comp_pressure(data, val, val2);
 		if (ret < 0)
 			return ret;
-		pm_runtime_mark_last_busy(data->dev);
 		pm_runtime_put_autosuspend(data->dev);
 
 		return IIO_VAL_INT_PLUS_MICRO;
···
 		ret = mpl115_read_temp(data);
 		if (ret < 0)
 			return ret;
-		pm_runtime_mark_last_busy(data->dev);
 		pm_runtime_put_autosuspend(data->dev);
 		*val = ret >> 6;
 

drivers/iio/pressure/zpa2326.c

···
 
 	zpa2326_sleep(indio_dev);
 
-	pm_runtime_mark_last_busy(parent);
 	pm_runtime_put_autosuspend(parent);
 }
 
···
 	pm_runtime_enable(parent);
 	pm_runtime_set_autosuspend_delay(parent, 1000);
 	pm_runtime_use_autosuspend(parent);
-	pm_runtime_mark_last_busy(parent);
 	pm_runtime_put_autosuspend(parent);
 }
 

drivers/iio/proximity/d3323aa.c

···
 
 	indio_dev = devm_iio_device_alloc(dev, sizeof(*data));
 	if (!indio_dev)
-		return dev_err_probe(dev, -ENOMEM,
-				     "Could not allocate iio device\n");
+		return -ENOMEM;
 
 	data = iio_priv(indio_dev);
 	data->dev = dev;

drivers/iio/proximity/hx9023s.c

···
 						    indio_dev->name,
 						    iio_device_id(indio_dev));
 		if (!data->trig)
-			return dev_err_probe(dev, -ENOMEM,
-					     "iio trigger alloc failed\n");
+			return -ENOMEM;
 
 		data->trig->ops = &hx9023s_trigger_ops;
 		iio_trigger_set_drvdata(data->trig, indio_dev);

drivers/iio/proximity/irsd200.c

···
 
 	indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data));
 	if (!indio_dev)
-		return dev_err_probe(&client->dev, -ENOMEM,
-				     "Could not allocate iio device\n");
+		return -ENOMEM;
 
 	data = iio_priv(indio_dev);
 	data->dev = &client->dev;
···
 	trigger = devm_iio_trigger_alloc(data->dev, "%s-dev%d", indio_dev->name,
 					 iio_device_id(indio_dev));
 	if (!trigger)
-		return dev_err_probe(data->dev, -ENOMEM,
-				     "Could not allocate iio trigger\n");
+		return -ENOMEM;
 
 	trigger->ops = &irsd200_trigger_ops;
 	iio_trigger_set_drvdata(trigger, data);

drivers/iio/proximity/mb1232.c

···
 	 */
 	struct completion	ranging;
 	int			irqnr;
-	/* Ensure correct alignment of data to push to IIO buffer */
-	struct {
-		s16 distance;
-		aligned_s64 ts;
-	} scan;
 };
 
 static irqreturn_t mb1232_handle_irq(int irq, void *dev_id)
···
 	struct iio_poll_func *pf = p;
 	struct iio_dev *indio_dev = pf->indio_dev;
 	struct mb1232_data *data = iio_priv(indio_dev);
+	struct {
+		s16 distance;
+		aligned_s64 ts;
+	} scan = { };
 
-	data->scan.distance = mb1232_read_distance(data);
-	if (data->scan.distance < 0)
+	scan.distance = mb1232_read_distance(data);
+	if (scan.distance < 0)
 		goto err;
 
-	iio_push_to_buffers_with_ts(indio_dev, &data->scan, sizeof(data->scan),
+	iio_push_to_buffers_with_ts(indio_dev, &scan, sizeof(scan),
 				    pf->timestamp);
 
 err:

drivers/iio/proximity/ping.c

···
 	struct iio_dev *indio_dev;
 
 	indio_dev = devm_iio_device_alloc(dev, sizeof(struct ping_data));
-	if (!indio_dev) {
-		dev_err(dev, "failed to allocate IIO device\n");
+	if (!indio_dev)
 		return -ENOMEM;
-	}
 
 	data = iio_priv(indio_dev);
 	data->dev = dev;

drivers/iio/proximity/pulsedlight-lidar-lite-v2.c

···
 
 	int (*xfer)(struct lidar_data *data, u8 reg, u8 *val, int len);
 	int i2c_enabled;
-
-	/* Ensure timestamp is naturally aligned */
-	struct {
-		u16 chan;
-		aligned_s64 timestamp;
-	} scan;
 };
 
 static const struct iio_chan_spec lidar_channels[] = {
···
 		}
 		ret = -EIO;
 	}
-	pm_runtime_mark_last_busy(&client->dev);
 	pm_runtime_put_autosuspend(&client->dev);
 
 	return ret;
···
 	struct iio_dev *indio_dev = pf->indio_dev;
 	struct lidar_data *data = iio_priv(indio_dev);
 	int ret;
+	struct {
+		u16 chan;
+		aligned_s64 timestamp;
+	} scan = { };
 
-	ret = lidar_get_measurement(data, &data->scan.chan);
+	ret = lidar_get_measurement(data, &scan.chan);
 	if (!ret) {
-		iio_push_to_buffers_with_ts(indio_dev, &data->scan,
-					    sizeof(data->scan),
+		iio_push_to_buffers_with_ts(indio_dev, &scan, sizeof(scan),
 					    iio_get_time_ns(indio_dev));
 	} else if (ret != -EINVAL) {
 		dev_err(&data->client->dev, "cannot read LIDAR measurement");

drivers/iio/proximity/srf04.c

···
 	udelay(data->cfg->trigger_pulse_us);
 	gpiod_set_value(data->gpiod_trig, 0);
 
-	if (data->gpiod_power) {
-		pm_runtime_mark_last_busy(data->dev);
+	if (data->gpiod_power)
 		pm_runtime_put_autosuspend(data->dev);
-	}
 
 	/* it should not take more than 20 ms until echo is rising */
 	ret = wait_for_completion_killable_timeout(&data->rising, HZ/50);
···
 	int ret;
 
 	indio_dev = devm_iio_device_alloc(dev, sizeof(struct srf04_data));
-	if (!indio_dev) {
-		dev_err(dev, "failed to allocate IIO device\n");
+	if (!indio_dev)
 		return -ENOMEM;
-	}
 
 	data = iio_priv(indio_dev);
 	data->dev = dev;

drivers/iio/proximity/srf08.c

···
 	int			range_mm;
 	struct mutex		lock;
 
-	/* Ensure timestamp is naturally aligned */
-	struct {
-		s16 chan;
-		aligned_s64 timestamp;
-	} scan;
-
 	/* Sensor-Type */
 	enum srf08_sensor_type	sensor_type;
 
···
 	struct iio_poll_func *pf = p;
 	struct iio_dev *indio_dev = pf->indio_dev;
 	struct srf08_data *data = iio_priv(indio_dev);
-	s16 sensor_data;
+	struct {
+		s16 chan;
+		aligned_s64 timestamp;
+	} scan = { };
 
-	sensor_data = srf08_read_ranging(data);
-	if (sensor_data < 0)
+	scan.chan = srf08_read_ranging(data);
+	if (scan.chan < 0)
 		goto err;
 
 	mutex_lock(&data->lock);
 
-	data->scan.chan = sensor_data;
-	iio_push_to_buffers_with_ts(indio_dev, &data->scan, sizeof(data->scan),
+	iio_push_to_buffers_with_ts(indio_dev, &scan, sizeof(scan),
 				    pf->timestamp);
 
 	mutex_unlock(&data->lock);

drivers/iio/proximity/sx9500.c

···
 	bool prox_stat[SX9500_NUM_CHANNELS];
 	bool event_enabled[SX9500_NUM_CHANNELS];
 	bool trigger_enabled;
-	u16 *buffer;
 	/* Remember enabled channels and sample rate during suspend. */
 	unsigned int suspend_ctrl0;
 	struct completion completion;
···
 	return ret;
 }
 
-static int sx9500_update_scan_mode(struct iio_dev *indio_dev,
-				   const unsigned long *scan_mask)
-{
-	struct sx9500_data *data = iio_priv(indio_dev);
-
-	mutex_lock(&data->mutex);
-	kfree(data->buffer);
-	data->buffer = kzalloc(indio_dev->scan_bytes, GFP_KERNEL);
-	mutex_unlock(&data->mutex);
-
-	if (data->buffer == NULL)
-		return -ENOMEM;
-
-	return 0;
-}
-
 static IIO_CONST_ATTR_SAMP_FREQ_AVAIL(
 	"2.500000 3.333333 5 6.666666 8.333333 11.111111 16.666666 33.333333");
 
···
 	.write_raw = &sx9500_write_raw,
 	.read_event_config = &sx9500_read_event_config,
 	.write_event_config = &sx9500_write_event_config,
-	.update_scan_mode = &sx9500_update_scan_mode,
 };
 
 static int sx9500_set_trigger_state(struct iio_trigger *trig,
···
 	struct iio_dev *indio_dev = pf->indio_dev;
 	struct sx9500_data *data = iio_priv(indio_dev);
 	int val, bit, ret, i = 0;
+	struct {
+		u16 chan[SX9500_NUM_CHANNELS];
+		aligned_s64 timestamp;
+	} scan = { };
 
 	mutex_lock(&data->mutex);
 
···
 		if (ret < 0)
 			goto out;
 
-		data->buffer[i++] = val;
+		scan.chan[i++] = val;
 	}
 
-	iio_push_to_buffers_with_timestamp(indio_dev, data->buffer,
+	iio_push_to_buffers_with_timestamp(indio_dev, &scan,
 					   iio_get_time_ns(indio_dev));
 
 out:
···
 	iio_triggered_buffer_cleanup(indio_dev);
 	if (client->irq > 0)
 		iio_trigger_unregister(data->trig);
-	kfree(data->buffer);
 }
 
 static int sx9500_suspend(struct device *dev)

drivers/iio/proximity/vl53l0x-i2c.c

···
 	struct regulator *vdd_supply;
 	struct gpio_desc *reset_gpio;
 	struct iio_trigger *trig;
-
-	struct {
-		u16 chan;
-		aligned_s64 timestamp;
-	} scan;
 };
 
 static int vl53l0x_clear_irq(struct vl53l0x_data *data)
···
 	struct vl53l0x_data *data = iio_priv(indio_dev);
 	u8 buffer[12];
 	int ret;
+	struct {
+		u16 chan;
+		aligned_s64 timestamp;
+	} scan = { };
 
 	ret = i2c_smbus_read_i2c_block_data(data->client,
 					VL_REG_RESULT_RANGE_STATUS,
···
 	else if (ret != 12)
 		return -EREMOTEIO;
 
-	data->scan.chan = get_unaligned_be16(&buffer[10]);
-	iio_push_to_buffers_with_ts(indio_dev, &data->scan, sizeof(data->scan),
+	scan.chan = get_unaligned_be16(&buffer[10]);
+	iio_push_to_buffers_with_ts(indio_dev, &scan, sizeof(scan),
 				    iio_get_time_ns(indio_dev));
 
 	iio_trigger_notify_done(indio_dev->trig);
···
 {
 	struct vl53l0x_data *data;
 	struct iio_dev *indio_dev;
-	int error;
 	int ret;
 
 	indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data));
···
 		return dev_err_probe(&client->dev, PTR_ERR(data->reset_gpio),
 				     "Cannot get reset GPIO\n");
 
-	error = vl53l0x_power_on(data);
-	if (error)
-		return dev_err_probe(&client->dev, error,
+	ret = vl53l0x_power_on(data);
+	if (ret)
+		return dev_err_probe(&client->dev, ret,
 				     "Failed to power on the chip\n");
 
-	error = devm_add_action_or_reset(&client->dev, vl53l0x_power_off, data);
-	if (error)
-		return dev_err_probe(&client->dev, error,
-				     "Failed to install poweroff action\n");
+	ret = devm_add_action_or_reset(&client->dev, vl53l0x_power_off, data);
+	if (ret)
+		return ret;
 
 	indio_dev->name = "vl53l0x";
 	indio_dev->info = &vl53l0x_info;

drivers/iio/temperature/Kconfig

···
 	  will be called max31865.
 
 config MCP9600
-	tristate "MCP9600 thermocouple EMF converter"
+	tristate "MCP9600 and similar thermocouple EMF converters"
 	depends on I2C
 	help
-	  If you say yes here you get support for MCP9600
-	  thermocouple EMF converter connected via I2C.
+	  If you say yes here you get support for...
+	  - MCP9600
+	  - MCP9601
+	  ...thermocouple EMF converters connected via I2C.
 
 	  This driver can also be built as a module. If so, the module
 	  will be called mcp9600.

drivers/iio/temperature/mcp9600.c

···
 #include <linux/iio/events.h>
 #include <linux/iio/iio.h>
 
+#include <dt-bindings/iio/temperature/thermocouple.h>
+
 /* MCP9600 registers */
-#define MCP9600_HOT_JUNCTION 0x0
-#define MCP9600_COLD_JUNCTION 0x2
-#define MCP9600_STATUS			0x4
+#define MCP9600_HOT_JUNCTION		0x00
+#define MCP9600_COLD_JUNCTION		0x02
+#define MCP9600_STATUS			0x04
 #define MCP9600_STATUS_ALERT(x)		BIT(x)
-#define MCP9600_ALERT_CFG1		0x8
+#define MCP9600_SENSOR_CFG		0x05
+#define MCP9600_SENSOR_TYPE_MASK	GENMASK(6, 4)
+#define MCP9600_ALERT_CFG1		0x08
 #define MCP9600_ALERT_CFG(x)		(MCP9600_ALERT_CFG1 + (x - 1))
 #define MCP9600_ALERT_CFG_ENABLE	BIT(0)
 #define MCP9600_ALERT_CFG_ACTIVE_HIGH	BIT(2)
 #define MCP9600_ALERT_CFG_FALLING	BIT(3)
 #define MCP9600_ALERT_CFG_COLD_JUNCTION	BIT(4)
-#define MCP9600_ALERT_HYSTERESIS1	0xc
+#define MCP9600_ALERT_HYSTERESIS1	0x0c
 #define MCP9600_ALERT_HYSTERESIS(x)	(MCP9600_ALERT_HYSTERESIS1 + (x - 1))
 #define MCP9600_ALERT_LIMIT1		0x10
 #define MCP9600_ALERT_LIMIT(x)		(MCP9600_ALERT_LIMIT1 + (x - 1))
 #define MCP9600_ALERT_LIMIT_MASK	GENMASK(15, 2)
-#define MCP9600_DEVICE_ID 0x20
+#define MCP9600_DEVICE_ID		0x20
 
 /* MCP9600 device id value */
-#define MCP9600_DEVICE_ID_MCP9600 0x40
+#define MCP9600_DEVICE_ID_MCP9600	0x40
+#define MCP9600_DEVICE_ID_MCP9601	0x41
 
 #define MCP9600_ALERT_COUNT		4
 
···
 	[MCP9600_ALERT4] = "alert4",
 };
 
+/* Map between dt-bindings enum and the chip's type value */
+static const unsigned int mcp9600_type_map[] = {
+	[THERMOCOUPLE_TYPE_K] = 0,
+	[THERMOCOUPLE_TYPE_J] = 1,
+	[THERMOCOUPLE_TYPE_T] = 2,
+	[THERMOCOUPLE_TYPE_N] = 3,
+	[THERMOCOUPLE_TYPE_S] = 4,
+	[THERMOCOUPLE_TYPE_E] = 5,
+	[THERMOCOUPLE_TYPE_B] = 6,
+	[THERMOCOUPLE_TYPE_R] = 7,
+};
+
+/* Map thermocouple type to a char for iio info in sysfs */
+static const int mcp9600_tc_types[] = {
+	[THERMOCOUPLE_TYPE_K] = 'K',
+	[THERMOCOUPLE_TYPE_J] = 'J',
+	[THERMOCOUPLE_TYPE_T] = 'T',
+	[THERMOCOUPLE_TYPE_N] = 'N',
+	[THERMOCOUPLE_TYPE_S] = 'S',
+	[THERMOCOUPLE_TYPE_E] = 'E',
+	[THERMOCOUPLE_TYPE_B] = 'B',
+	[THERMOCOUPLE_TYPE_R] = 'R',
+};
+
 static const struct iio_event_spec mcp9600_events[] = {
 	{
 		.type = IIO_EV_TYPE_THRESH,
···
 	},
 };
 
+struct mcp_chip_info {
+	u8 chip_id;
+	const char *chip_name;
+};
+
+struct mcp9600_data {
+	struct i2c_client *client;
+	u32 thermocouple_type;
+};
+
+static int mcp9600_config(struct mcp9600_data *data)
+{
+	struct i2c_client *client = data->client;
+	int ret;
+	u8 cfg;
+
+	cfg  = FIELD_PREP(MCP9600_SENSOR_TYPE_MASK,
+			  mcp9600_type_map[data->thermocouple_type]);
+
+	ret = i2c_smbus_write_byte_data(client, MCP9600_SENSOR_CFG, cfg);
+	if (ret < 0) {
+		dev_err(&client->dev, "Failed to set sensor configuration\n");
+		return ret;
+	}
+
+	return 0;
+}
+
 #define MCP9600_CHANNELS(hj_num_ev, hj_ev_spec_off, cj_num_ev, cj_ev_spec_off) \
 	{								       \
 		{							       \
 			.type = IIO_TEMP,				       \
 			.address = MCP9600_HOT_JUNCTION,		       \
 			.info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |	       \
+					      BIT(IIO_CHAN_INFO_THERMOCOUPLE_TYPE) | \
 					      BIT(IIO_CHAN_INFO_SCALE),	       \
 			.event_spec = &mcp9600_events[hj_ev_spec_off],	       \
 			.num_event_specs = hj_num_ev,			       \
···
 	MCP9600_CHANNELS(2, 0, 2, 0), /* Alerts: 1 2 3 4 */
 };
 
-struct mcp9600_data {
-	struct i2c_client *client;
-};
-
 static int mcp9600_read(struct mcp9600_data *data,
 			struct iio_chan_spec const *chan, int *val)
 {
···
 		*val = 62;
 		*val2 = 500000;
 		return IIO_VAL_INT_PLUS_MICRO;
+	case IIO_CHAN_INFO_THERMOCOUPLE_TYPE:
+		*val = mcp9600_tc_types[data->thermocouple_type];
+		return IIO_VAL_CHAR;
 	default:
 		return -EINVAL;
 	}
···
 
 static int mcp9600_probe(struct i2c_client *client)
 {
+	struct device *dev = &client->dev;
+	const struct mcp_chip_info *chip_info;
 	struct iio_dev *indio_dev;
 	struct mcp9600_data *data;
-	int ret, ch_sel;
+	int ch_sel, dev_id, ret;
 
-	ret = i2c_smbus_read_byte_data(client, MCP9600_DEVICE_ID);
-	if (ret < 0)
-		return dev_err_probe(&client->dev, ret, "Failed to read device ID\n");
-	if (ret != MCP9600_DEVICE_ID_MCP9600)
-		dev_warn(&client->dev, "Expected ID %x, got %x\n",
-				MCP9600_DEVICE_ID_MCP9600, ret);
+	chip_info = i2c_get_match_data(client);
+	if (!chip_info)
+		return dev_err_probe(dev, -ENODEV,
+				     "No chip-info found for device\n");
 
-	indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data));
+	dev_id = i2c_smbus_read_byte_data(client, MCP9600_DEVICE_ID);
+	if (dev_id < 0)
+		return dev_err_probe(dev, dev_id, "Failed to read device ID\n");
+
+	switch (dev_id) {
+	case MCP9600_DEVICE_ID_MCP9600:
+	case MCP9600_DEVICE_ID_MCP9601:
+		if (dev_id != chip_info->chip_id)
+			dev_warn(dev,
+				 "Expected id %02x, but device responded with %02x\n",
+				 chip_info->chip_id, dev_id);
+		break;
+
+	default:
+		dev_warn(dev, "Unknown id %x, using %x\n", dev_id,
+			 chip_info->chip_id);
+	}
+
+	indio_dev = devm_iio_device_alloc(dev, sizeof(*data));
 	if (!indio_dev)
 		return -ENOMEM;
 
 	data = iio_priv(indio_dev);
 	data->client = client;
 
+	/* Accept type from dt with default of Type-K. */
+	data->thermocouple_type = THERMOCOUPLE_TYPE_K;
+	ret = device_property_read_u32(dev, "thermocouple-type",
+				       &data->thermocouple_type);
+	if (ret && ret != -EINVAL)
+		return dev_err_probe(dev, ret,
+				     "Error reading thermocouple-type property\n");
+
+	if (data->thermocouple_type >= ARRAY_SIZE(mcp9600_type_map))
+		return dev_err_probe(dev, -EINVAL,
+				     "Invalid thermocouple-type property %u.\n",
+				     data->thermocouple_type);
+
+	/* Set initial config. */
+	ret = mcp9600_config(data);
+	if (ret)
+		return ret;
+
 	ch_sel = mcp9600_probe_alerts(indio_dev);
 	if (ch_sel < 0)
 		return ch_sel;
 
 	indio_dev->info = &mcp9600_info;
-	indio_dev->name = "mcp9600";
+	indio_dev->name = chip_info->chip_name;
 	indio_dev->modes = INDIO_DIRECT_MODE;
 	indio_dev->channels = mcp9600_channels[ch_sel];
 	indio_dev->num_channels = ARRAY_SIZE(mcp9600_channels[ch_sel]);
 
-	return devm_iio_device_register(&client->dev, indio_dev);
+	return devm_iio_device_register(dev, indio_dev);
 }
 
+static const struct mcp_chip_info mcp9600_chip_info = {
+	.chip_id   = MCP9600_DEVICE_ID_MCP9600,
+	.chip_name = "mcp9600",
+};
+
+static const struct mcp_chip_info mcp9601_chip_info = {
+	.chip_id   = MCP9600_DEVICE_ID_MCP9601,
+	.chip_name = "mcp9601",
+};
+
 static const struct i2c_device_id mcp9600_id[] = {
-	{ "mcp9600" },
+	{ "mcp9600", .driver_data = (kernel_ulong_t)&mcp9600_chip_info },
+	{ "mcp9601", .driver_data = (kernel_ulong_t)&mcp9601_chip_info },
 	{ }
 };
 MODULE_DEVICE_TABLE(i2c, mcp9600_id);
 
 static const struct of_device_id mcp9600_of_match[] = {
-	{ .compatible = "microchip,mcp9600" },
+	{ .compatible = "microchip,mcp9600", .data = &mcp9600_chip_info },
+	{ .compatible = "microchip,mcp9601", .data = &mcp9601_chip_info },
 	{ }
 };
 MODULE_DEVICE_TABLE(of, mcp9600_of_match);

drivers/iio/temperature/mlx90614.c

···
 	if (!data->wakeup_gpio)
 		return;
 
-	pm_runtime_mark_last_busy(&data->client->dev);
 	pm_runtime_put_autosuspend(&data->client->dev);
 }
 #else

drivers/iio/temperature/mlx90632.c

···
 	}
 
 mlx90632_read_raw_pm:
-	pm_runtime_mark_last_busy(&data->client->dev);
 	pm_runtime_put_autosuspend(&data->client->dev);
 	return ret;
 }
···
 	int ret;
 
 	indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*mlx90632));
-	if (!indio_dev) {
-		dev_err(&client->dev, "Failed to allocate device\n");
+	if (!indio_dev)
 		return -ENOMEM;
-	}
 
 	regmap = devm_regmap_init_i2c(client, &mlx90632_regmap);
 	if (IS_ERR(regmap)) {

drivers/iio/temperature/mlx90635.c

···
 	}
 
 mlx90635_read_raw_pm:
-	pm_runtime_mark_last_busy(&data->client->dev);
 	pm_runtime_put_autosuspend(&data->client->dev);
 	return ret;
 }
···
 
 	indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*mlx90635));
 	if (!indio_dev)
-		return dev_err_probe(&client->dev, -ENOMEM, "failed to allocate device\n");
+		return -ENOMEM;
 
 	regmap = devm_regmap_init_i2c(client, &mlx90635_regmap);
 	if (IS_ERR(regmap))
···
 	ret = devm_add_action_or_reset(&client->dev, mlx90635_disable_regulator,
 				       mlx90635);
 	if (ret < 0)
-		return dev_err_probe(&client->dev, ret,
-				     "failed to setup regulator cleanup action\n");
+		return ret;
 
 	ret = mlx90635_wakeup(mlx90635);
 	if (ret < 0)
···
 
 	ret = devm_add_action_or_reset(&client->dev, mlx90635_sleep, mlx90635);
 	if (ret < 0)
-		return dev_err_probe(&client->dev, ret,
-				     "failed to setup low power cleanup\n");
+		return ret;
 
 	ret = regmap_read(mlx90635->regmap_ee, MLX90635_EE_VERSION, &dsp_version);
 	if (ret < 0)

drivers/iio/test/Kconfig

···
 	  to the KUnit documentation in Documentation/dev-tools/kunit/.
 
 	  If unsure, say N.
+
+config IIO_MULTIPLY_KUNIT_TEST
+	tristate "Test IIO multiply functions" if !KUNIT_ALL_TESTS
+	depends on KUNIT
+	default KUNIT_ALL_TESTS
+	help
+	  build unit tests for the IIO multiply functions.
+
+	  For more information on KUnit and unit tests in general, please refer
+	  to the KUnit documentation in Documentation/dev-tools/kunit/.
+
+	  If unsure, say N.

drivers/iio/test/Makefile

···
 obj-$(CONFIG_IIO_RESCALE_KUNIT_TEST) += iio-test-rescale.o
 obj-$(CONFIG_IIO_FORMAT_KUNIT_TEST) += iio-test-format.o
 obj-$(CONFIG_IIO_GTS_KUNIT_TEST) += iio-test-gts.o
+obj-$(CONFIG_IIO_MULTIPLY_KUNIT_TEST) += iio-test-multiply.o
 CFLAGS_iio-test-format.o += $(DISABLE_STRUCTLEAK_PLUGIN)

drivers/iio/test/iio-test-multiply.c

···
+// SPDX-License-Identifier: GPL-2.0-only
+/* Unit tests for IIO multiply functions
+ *
+ * Copyright (c) 2025 Hans de Goede <[e-mail]>
+ * Based on iio-test-format.c which is:
+ * Copyright (c) 2020 Lars-Peter Clausen <[e-mail]>
+ */
+
+#include <kunit/test.h>
+#include <linux/iio/consumer.h>
+#include <linux/math64.h>
+#include <linux/types.h>
+
+static void __iio_test_iio_multiply_value_integer(struct kunit *test, s64 multiplier)
+{
+	int ret, result, val;
+
+	val = 42;
+	ret = iio_multiply_value(&result, multiplier, IIO_VAL_INT, val, 0);
+	KUNIT_EXPECT_EQ(test, ret, IIO_VAL_INT);
+	KUNIT_EXPECT_EQ(test, result, multiplier * val);
+
+	val = -23;
+	ret = iio_multiply_value(&result, multiplier, IIO_VAL_INT, val, 0);
+	KUNIT_EXPECT_EQ(test, ret, IIO_VAL_INT);
+	KUNIT_EXPECT_EQ(test, result, multiplier * val);
+
+	val = 0;
+	ret = iio_multiply_value(&result, multiplier, IIO_VAL_INT, val, 0);
+	KUNIT_EXPECT_EQ(test, ret, IIO_VAL_INT);
+	KUNIT_EXPECT_EQ(test, result, multiplier * val);
+}
+
+static void iio_test_iio_multiply_value_integer(struct kunit *test)
+{
+	__iio_test_iio_multiply_value_integer(test, 20);
+	__iio_test_iio_multiply_value_integer(test, -20);
+}
+
+static void __iio_test_iio_multiply_value_fixedpoint(struct kunit *test, s64 multiplier)
+{
+	int ret, result, val, val2;
+
+	/* positive >= 1 (1.5) */
+	val = 1;
+	val2 = 500000;
+	ret = iio_multiply_value(&result, multiplier, IIO_VAL_INT_PLUS_MICRO, val, val2);
+	KUNIT_EXPECT_EQ(test, ret, IIO_VAL_INT);
+	KUNIT_EXPECT_EQ(test, result, div_s64(multiplier * 15, 10));
+
+	val = 1;
+	val2 = 500000000;
+	ret = iio_multiply_value(&result, multiplier, IIO_VAL_INT_PLUS_NANO, val, val2);
+	KUNIT_EXPECT_EQ(test, ret, IIO_VAL_INT);
+	KUNIT_EXPECT_EQ(test, result, div_s64(multiplier * 15, 10));
+
+	/* positive < 1 (0.5) */
+	val = 0;
+	val2 = 500000;
+	ret = iio_multiply_value(&result, multiplier, IIO_VAL_INT_PLUS_MICRO, val, val2);
+	KUNIT_EXPECT_EQ(test, ret, IIO_VAL_INT);
+	KUNIT_EXPECT_EQ(test, result, div_s64(multiplier * 5, 10));
+
+	val = 0;
+	val2 = 500000000;
+	ret = iio_multiply_value(&result, multiplier, IIO_VAL_INT_PLUS_NANO, val, val2);
+	KUNIT_EXPECT_EQ(test, ret, IIO_VAL_INT);
+	KUNIT_EXPECT_EQ(test, result, div_s64(multiplier * 5, 10));
+
+	/* negative <= -1 (-1.5) */
+	val = -1;
+	val2 = 500000;
+	ret = iio_multiply_value(&result, multiplier, IIO_VAL_INT_PLUS_MICRO, val, val2);
+	KUNIT_EXPECT_EQ(test, ret, IIO_VAL_INT);
+	KUNIT_EXPECT_EQ(test, result, div_s64(multiplier * -15, 10));
+
+	val = -1;
+	val2 = 500000000;
+	ret = iio_multiply_value(&result, multiplier, IIO_VAL_INT_PLUS_NANO, val, val2);
+	KUNIT_EXPECT_EQ(test, ret, IIO_VAL_INT);
+	KUNIT_EXPECT_EQ(test, result, div_s64(multiplier * -15, 10));
+
+	/* negative > -1 (-0.5) */
+	val = 0;
+	val2 = -500000;
+	ret = iio_multiply_value(&result, multiplier, IIO_VAL_INT_PLUS_MICRO, val, val2);
+	KUNIT_EXPECT_EQ(test, ret, IIO_VAL_INT);
+	KUNIT_EXPECT_EQ(test, result, div_s64(multiplier * -5, 10));
+
+	val = 0;
+	val2 = -500000000;
+	ret = iio_multiply_value(&result, multiplier, IIO_VAL_INT_PLUS_NANO, val, val2);
+	KUNIT_EXPECT_EQ(test, ret, IIO_VAL_INT);
+	KUNIT_EXPECT_EQ(test, result, div_s64(multiplier * -5, 10));
+}
+
+static void iio_test_iio_multiply_value_fixedpoint(struct kunit *test)
+{
+	__iio_test_iio_multiply_value_fixedpoint(test, 20);
+	__iio_test_iio_multiply_value_fixedpoint(test, -20);
+}
+
+static void __iio_test_iio_multiply_value_fractional(struct kunit *test, s64 multiplier)
+{
+	int ret, result, val, val2;
+
+	/* positive < 1 (1/10)*/
+	val = 1;
+	val2 = 10;
+	ret = iio_multiply_value(&result, multiplier, IIO_VAL_FRACTIONAL, val, val2);
+	KUNIT_EXPECT_EQ(test, ret, IIO_VAL_INT);
+	KUNIT_EXPECT_EQ(test, result, div_s64(multiplier * val, val2));
+
+	/* positive >= 1 (100/3)*/
+	val = 100;
+	val2 = 3;
+	ret = iio_multiply_value(&result, multiplier, IIO_VAL_FRACTIONAL, val, val2);
+	KUNIT_EXPECT_EQ(test, ret, IIO_VAL_INT);
+	KUNIT_EXPECT_EQ(test, result, div_s64(multiplier * val, val2));
+
+	/* negative > -1 (-1/10) */
+	val = -1;
+	val2 = 10;
+	ret = iio_multiply_value(&result, multiplier, IIO_VAL_FRACTIONAL, val, val2);
+	KUNIT_EXPECT_EQ(test, ret, IIO_VAL_INT);
+	KUNIT_EXPECT_EQ(test, result, div_s64(multiplier * val, val2));
+
+	/* negative <= -1 (-200/3)*/
+	val = -200;
+	val2 = 3;
+	ret = iio_multiply_value(&result, multiplier, IIO_VAL_FRACTIONAL, val, val2);
+	KUNIT_EXPECT_EQ(test, ret, IIO_VAL_INT);
+	KUNIT_EXPECT_EQ(test, result, div_s64(multiplier * val, val2));
+
+	/* Zero (0/-10) */
+	val = 0;
+	val2 = -10;
+	ret = iio_multiply_value(&result, multiplier, IIO_VAL_FRACTIONAL, val, val2);
+	KUNIT_EXPECT_EQ(test, ret, IIO_VAL_INT);
+	KUNIT_EXPECT_EQ(test, result, div_s64(multiplier * val, val2));
+}
+
+static void iio_test_iio_multiply_value_fractional(struct kunit *test)
+{
+	__iio_test_iio_multiply_value_fractional(test, 20);
+	__iio_test_iio_multiply_value_fractional(test, -20);
+}
+
+static void __iio_test_iio_multiply_value_fractional_log2(struct kunit *test, s64 multiplier)
+{
+	int ret, result, val, val2;
+
+	/* positive < 1 (123/1024) */
+	val = 123;
+	val2 = 10;
+	ret = iio_multiply_value(&result, multiplier, IIO_VAL_FRACTIONAL_LOG2, val, val2);
+	KUNIT_EXPECT_EQ(test, ret, IIO_VAL_INT);
+	KUNIT_EXPECT_EQ(test, result, (multiplier * val) >> val2);
+
+	/* positive >= 1 (1234567/1024) */
+	val = 1234567;
+	val2 = 10;
+	ret = iio_multiply_value(&result, multiplier, IIO_VAL_FRACTIONAL_LOG2, val, val2);
+	KUNIT_EXPECT_EQ(test, ret, IIO_VAL_INT);
+	KUNIT_EXPECT_EQ(test, result, (multiplier * val) >> val2);
+
+	/* negative > -1 (-123/1024) */
+	val = -123;
+	val2 = 10;
+	ret = iio_multiply_value(&result, multiplier, IIO_VAL_FRACTIONAL_LOG2, val, val2);
+	KUNIT_EXPECT_EQ(test, ret, IIO_VAL_INT);
+	KUNIT_EXPECT_EQ(test, result, (multiplier * val) >> val2);
+
+	/* negative <= -1 (-1234567/1024) */
+	val = -1234567;
+	val2 = 10;
+	ret = iio_multiply_value(&result, multiplier, IIO_VAL_FRACTIONAL_LOG2, val, val2);
+	KUNIT_EXPECT_EQ(test, ret, IIO_VAL_INT);
+	KUNIT_EXPECT_EQ(test, result, (multiplier * val) >> val2);
+
+	/* Zero (0/1024) */
+	val = 0;
+	val2 = 10;
+	ret = iio_multiply_value(&result, multiplier, IIO_VAL_FRACTIONAL_LOG2, val, val2);
+	KUNIT_EXPECT_EQ(test, ret, IIO_VAL_INT);
+	KUNIT_EXPECT_EQ(test, result, (multiplier * val) >> val2);
+}
+
+static void iio_test_iio_multiply_value_fractional_log2(struct kunit *test)
+{
+	__iio_test_iio_multiply_value_fractional_log2(test, 20);
+	__iio_test_iio_multiply_value_fractional_log2(test, -20);
+}
+
+static struct kunit_case iio_multiply_test_cases[] = {
+		KUNIT_CASE(iio_test_iio_multiply_value_integer),
+		KUNIT_CASE(iio_test_iio_multiply_value_fixedpoint),
+		KUNIT_CASE(iio_test_iio_multiply_value_fractional),
+		KUNIT_CASE(iio_test_iio_multiply_value_fractional_log2),
+		{ }
+};
+
+static struct kunit_suite iio_multiply_test_suite = {
+	.name = "iio-multiply",
+	.test_cases = iio_multiply_test_cases,
+};
+kunit_test_suite(iio_multiply_test_suite);
+
+MODULE_AUTHOR("Hans de Goede <[e-mail]>");
+MODULE_DESCRIPTION("Test IIO multiply functions");
+MODULE_LICENSE("GPL");
+MODULE_IMPORT_NS("IIO_UNIT_TEST");

drivers/staging/iio/adc/ad7816.c

···
 	if (!indio_dev)
 		return -ENOMEM;
 	chip = iio_priv(indio_dev);
-	/* this is only used for device removal purposes */
-	dev_set_drvdata(&spi_dev->dev, indio_dev);
 
 	chip->spi_dev = spi_dev;
 	for (i = 0; i <= AD7816_CS_MAX; i++)

include/linux/iio/consumer.h

···
 			   int *val2);
 
 /**
+ * iio_multiply_value() - Multiply an IIO value
+ * @result:	Destination pointer for the multiplication result
+ * @multiplier:	Multiplier.
+ * @type:	One of the IIO_VAL_* constants. This decides how the @val and
+ *		@val2 parameters are interpreted.
+ * @val:	Value being multiplied.
+ * @val2:	Value being multiplied. @val2 use depends on type.
+ *
+ * Multiply an IIO value with a s64 multiplier storing the result as
+ * IIO_VAL_INT. This is typically used for scaling.
+ *
+ * Returns:
+ * IIO_VAL_INT on success or a negative error-number on failure.
+ */
+int iio_multiply_value(int *result, s64 multiplier,
+		       unsigned int type, int val, int val2);
+
+/**
  * iio_convert_raw_to_processed() - Converts a raw value to a processed value
  * @chan:		The channel being queried
  * @raw:		The raw IIO to convert

include/linux/iio/iio.h

···
 			unsigned int num_ext_scan_type;
 		};
 	};
-	long			info_mask_separate;
-	long			info_mask_separate_available;
-	long			info_mask_shared_by_type;
-	long			info_mask_shared_by_type_available;
-	long			info_mask_shared_by_dir;
-	long			info_mask_shared_by_dir_available;
-	long			info_mask_shared_by_all;
-	long			info_mask_shared_by_all_available;
+	unsigned long			info_mask_separate;
+	unsigned long			info_mask_separate_available;
+	unsigned long			info_mask_shared_by_type;
+	unsigned long			info_mask_shared_by_type_available;
+	unsigned long			info_mask_shared_by_dir;
+	unsigned long			info_mask_shared_by_dir_available;
+	unsigned long			info_mask_shared_by_all;
+	unsigned long			info_mask_shared_by_all_available;
 	const struct iio_event_spec *event_spec;
 	unsigned int		num_event_specs;
 	const struct iio_chan_spec_ext_info *ext_info;
···
  * them safe for use with non-coherent DMA.
  *
  * A number of drivers also use this on buffers that include a 64-bit timestamp
- * that is used with iio_push_to_buffer_with_ts(). Therefore, in the case where
+ * that is used with iio_push_to_buffers_with_ts(). Therefore, in the case where
  * DMA alignment is not sufficient for proper timestamp alignment, we align to
  * 8 bytes instead.
  */
···
  * @name: identifier name of the buffer
  * @count: number of elements in the buffer
  *
- * Declares a buffer that is safe to use with iio_push_to_buffer_with_ts(). In
+ * Declares a buffer that is safe to use with iio_push_to_buffers_with_ts(). In
  * addition to allocating enough space for @count elements of @type, it also
  * allocates space for a s64 timestamp at the end of the buffer and ensures
  * proper alignment of the timestamp.

include/linux/iio/types.h

···
 	IIO_CHAN_INFO_ZEROPOINT,
 	IIO_CHAN_INFO_TROUGH,
 	IIO_CHAN_INFO_CONVDELAY,
+	IIO_CHAN_INFO_POWERFACTOR,
 };
 
 #endif /* _IIO_TYPES_H_ */

include/linux/mfd/88pm886.h

···
 #define PM886_IRQ_ONKEY			0
 
 #define PM886_PAGE_OFFSET_REGULATORS	1
+#define PM886_PAGE_OFFSET_GPADC		2
 
 #define PM886_REG_ID			0x00
 
···
 
 #define PM886_LDO_VSEL_MASK		0x0f
 #define PM886_BUCK_VSEL_MASK		0x7f
+
+/* GPADC enable/disable registers */
+#define PM886_REG_GPADC_CONFIG(n)	(n)
+
+#define PM886_GPADC_VSC_EN		BIT(0)
+#define PM886_GPADC_VBAT_EN		BIT(1)
+#define PM886_GPADC_GNDDET1_EN		BIT(3)
+#define PM886_GPADC_VBUS_EN		BIT(4)
+#define PM886_GPADC_VCHG_PWR_EN		BIT(5)
+#define PM886_GPADC_VCF_OUT_EN		BIT(6)
+#define PM886_GPADC_CONFIG1_EN_ALL	\
+	(PM886_GPADC_VSC_EN |		\
+	 PM886_GPADC_VBAT_EN |		\
+	 PM886_GPADC_GNDDET1_EN |	\
+	 PM886_GPADC_VBUS_EN |		\
+	 PM886_GPADC_VCHG_PWR_EN |	\
+	 PM886_GPADC_VCF_OUT_EN)
+
+#define PM886_GPADC_TINT_EN		BIT(0)
+#define PM886_GPADC_PMODE_EN		BIT(1)
+#define PM886_GPADC_GPADC0_EN		BIT(2)
+#define PM886_GPADC_GPADC1_EN		BIT(3)
+#define PM886_GPADC_GPADC2_EN		BIT(4)
+#define PM886_GPADC_GPADC3_EN		BIT(5)
+#define PM886_GPADC_MIC_DET_EN		BIT(6)
+#define PM886_GPADC_CONFIG2_EN_ALL	\
+	(PM886_GPADC_TINT_EN |		\
+	 PM886_GPADC_GPADC0_EN |	\
+	 PM886_GPADC_GPADC1_EN |	\
+	 PM886_GPADC_GPADC2_EN |	\
+	 PM886_GPADC_GPADC3_EN |	\
+	 PM886_GPADC_MIC_DET_EN)
+
+/* No CONFIG3_EN_ALL because this is the only bit there. */
+#define PM886_GPADC_GND_DET2_EN		BIT(0)
+
+/* GPADC channel registers */
+#define PM886_REG_GPADC_VSC		0x40
+#define PM886_REG_GPADC_VCHG_PWR	0x4c
+#define PM886_REG_GPADC_VCF_OUT		0x4e
+#define PM886_REG_GPADC_TINT		0x50
+#define PM886_REG_GPADC_GPADC0		0x54
+#define PM886_REG_GPADC_GPADC1		0x56
+#define PM886_REG_GPADC_GPADC2		0x58
+#define PM886_REG_GPADC_VBAT		0xa0
+#define PM886_REG_GPADC_GND_DET1	0xa4
+#define PM886_REG_GPADC_GND_DET2	0xa6
+#define PM886_REG_GPADC_VBUS		0xa8
+#define PM886_REG_GPADC_GPADC3		0xaa
+#define PM886_REG_GPADC_MIC_DET		0xac
+#define PM886_REG_GPADC_VBAT_SLP	0xb0
+
+/* VBAT_SLP is the last register and is 2 bytes wide like other channels. */
+#define PM886_GPADC_MAX_REGISTER	(PM886_REG_GPADC_VBAT_SLP + 1)
+
+#define PM886_GPADC_BIAS_LEVELS		16
+#define PM886_GPADC_INDEX_TO_BIAS_uA(i)	(1 + (i) * 5)
 
 struct pm886_chip {
 	struct i2c_client *client;

include/linux/platform_data/touchscreen-s3c2410.h

···
-/* SPDX-License-Identifier: GPL-2.0-only */
-/*
- * Copyright (c) 2005 Arnaud Patard <[e-mail]>
-*/
-
-#ifndef __TOUCHSCREEN_S3C2410_H
-#define __TOUCHSCREEN_S3C2410_H
-
-struct s3c2410_ts_mach_info {
-	int delay;
-	int presc;
-	int oversampling_shift;
-	void (*cfg_gpio)(struct platform_device *dev);
-};
-
-extern void s3c24xx_ts_set_platdata(struct s3c2410_ts_mach_info *);
-extern void s3c64xx_ts_set_platdata(struct s3c2410_ts_mach_info *);
-
-/* defined by architecture to configure gpio */
-extern void s3c24xx_ts_cfg_gpio(struct platform_device *dev);
-
-#endif /*__TOUCHSCREEN_S3C2410_H */

include/uapi/linux/iio/types.h

···
 	IIO_COLORTEMP,
 	IIO_CHROMATICITY,
 	IIO_ATTENTION,
+	IIO_ALTCURRENT,
 };
 
 enum iio_modifier {
···
 	IIO_MOD_ROLL,
 	IIO_MOD_LIGHT_UVA,
 	IIO_MOD_LIGHT_UVB,
+	IIO_MOD_RMS,
+	IIO_MOD_ACTIVE,
+	IIO_MOD_REACTIVE,
+	IIO_MOD_APPARENT,
 };
 
 enum iio_event_type {

tools/iio/iio_event_monitor.c

···
 	[IIO_COLORTEMP] = "colortemp",
 	[IIO_CHROMATICITY] = "chromaticity",
 	[IIO_ATTENTION] = "attention",
+	[IIO_ALTCURRENT] = "altcurrent",
 };
 
 static const char * const iio_ev_type_text[] = {
···
 	[IIO_MOD_PITCH] = "pitch",
 	[IIO_MOD_YAW] = "yaw",
 	[IIO_MOD_ROLL] = "roll",
+	[IIO_MOD_RMS] = "rms",
+	[IIO_MOD_ACTIVE] = "active",
+	[IIO_MOD_REACTIVE] = "reactive",
+	[IIO_MOD_APPARENT] = "apparent",
 };
 
 static bool event_is_known(struct iio_event_data *event)
···
 	case IIO_COLORTEMP:
 	case IIO_CHROMATICITY:
 	case IIO_ATTENTION:
+	case IIO_ALTCURRENT:
 		break;
 	default:
 		return false;
···
 	case IIO_MOD_PM4:
 	case IIO_MOD_PM10:
 	case IIO_MOD_O2:
+	case IIO_MOD_RMS:
+	case IIO_MOD_ACTIVE:
+	case IIO_MOD_REACTIVE:
+	case IIO_MOD_APPARENT:
 		break;
 	default:
 		return false;