Merge tag 'leds-next-6.4' of git://git.kernel.org/pub/scm/linux/kernel/git/lee/leds

Pull LED updates from Lee Jones:
"New Drivers:
- Add support for MediaTek MT6370 LED Indicator
- Add support for MediaTek MT6370 Flashlight
- Add support for QCOM PMIC Flash
- Add support for Rohm BD2606MVV Charge Pump LED

New Device Support:
- Add support for PMK8550 PWM to QCOM LPG

New Functionality:
- Add support for high resolution PWM to QCOM LPG

Fix-ups:
- Kconfig 'depends' and 'select' dependency changes
- Remove unused / irrelevant includes
- Remove unnecessary checks (already performed further into the call stack)
- Trivial: Fix commentary, simplify error messages
- Rid 'defined but not used' warnings
- Provide documentation
- Explicitly provide include files

Bug Fixes:
- Mark GPIO LED as BROKEN
- Fix Kconfig entries
- Fix various Smatch staticify reports
- Fix error handling (or a lack there of)"

* tag 'leds-next-6.4' of git://git.kernel.org/pub/scm/linux/kernel/git/lee/leds: (30 commits)
leds: bd2606mvv: Driver for the Rohm 6 Channel i2c LED driver
dt-bindings: leds: Add ROHM BD2606MVV LED
docs: leds: ledtrig-oneshot: Fix spelling mistake
leds: pwm-multicolor: Simplify an error message
dt-bindings: leds: Convert PCA9532 to dtschema
leds: rgb: leds-qcom-lpg: Add support for PMK8550 PWM
leds: rgb: leds-qcom-lpg: Add support for high resolution PWM
dt-bindings: leds-qcom-lpg: Add qcom,pmk8550-pwm compatible string
leds: tca6507: Fix error handling of using fwnode_property_read_string
leds: flash: Set variables mvflash_{3,4}ch_regs storage-class-specifier to static
leds: rgb: mt6370: Correct config name to select in LEDS_MT6370_RGB
MAINTAINERS: Add entry for LED devices documentation
Documentation: leds: MT6370: Use bullet lists for timing variables
Documentation: leds: mt6370: Properly wrap hw_pattern chart
Documentation: leds: Add MT6370 doc to the toctree
leds: rgb: mt6370: Fix implicit declaration for FIELD_GET
docs: leds: Add MT6370 RGB LED pattern document
leds: flash: mt6370: Add MediaTek MT6370 flashlight support
leds: rgb: mt6370: Add MediaTek MT6370 current sink type LED Indicator support
dt-bindings: leds: spmi-flash-led: Add pm6150l compatible
...

Documentation/devicetree/bindings/leds/common.yaml

···
           - heartbeat
             # LED indicates disk activity
           - disk-activity
+            # LED indicates disk read activity
           - disk-read
+            # LED indicates disk write activity
           - disk-write
             # LED flashes at a fixed, configurable rate
           - timer
             # LED alters the brightness for the specified duration with one software
             # timer (requires "led-pattern" property)
           - pattern
+            # LED indicates mic mute state
+          - audio-micmute
+            # LED indicates audio mute state
+          - audio-mute
+            # LED indicates bluetooth power state
+          - bluetooth-power
+            # LED indicates activity of all CPUs
+          - cpu
+            # LED indicates camera flash state
+          - flash
+            # LED indicated keyboard capslock
+          - kbd-capslock
+            # LED indicates MTD memory activity
+          - mtd
+            # LED indicates NAND memory activity (deprecated),
+            # in new implementations use "mtd"
+          - nand-disk
+            # No trigger assigned to the LED. This is the default mode
+            # if trigger is absent
+          - none
+            # LED indicates camera torch state
+          - torch
+            # LED indicates USB gadget activity
           - usb-gadget
+            # LED indicates USB host activity
           - usb-host
+            # LED indicates USB port state
+          - usbport
+        # LED is triggered by CPU activity
       - pattern: "^cpu[0-9]*$"
-      - pattern: "^hci[0-9]+-power$"
         # LED is triggered by Bluetooth activity
-      - pattern: "^mmc[0-9]+$"
+      - pattern: "^hci[0-9]+-power$"
         # LED is triggered by SD/MMC activity
-      - pattern: "^phy[0-9]+tx$"
+      - pattern: "^mmc[0-9]+$"
         # LED is triggered by WLAN activity
+      - pattern: "^phy[0-9]+tx$"
 
   led-pattern:
     description: |

Documentation/devicetree/bindings/leds/leds-pca9532.txt

···
-*NXP - pca9532 PWM LED Driver
-
-The PCA9532 family is SMBus I/O expander optimized for dimming LEDs.
-The PWM support 256 steps.
-
-Required properties:
-	- compatible:
-		"nxp,pca9530"
-		"nxp,pca9531"
-		"nxp,pca9532"
-		"nxp,pca9533"
-	- reg -  I2C slave address
-
-Each led is represented as a sub-node of the nxp,pca9530.
-
-Optional sub-node properties:
-	- label: see Documentation/devicetree/bindings/leds/common.txt
-	- type: Output configuration, see dt-bindings/leds/leds-pca9532.h (default NONE)
-	- linux,default-trigger: see Documentation/devicetree/bindings/leds/common.txt
-	- default-state: see Documentation/devicetree/bindings/leds/common.txt
-	  This property is only valid for sub-nodes of type <PCA9532_TYPE_LED>.
-
-Example:
-  #include <dt-bindings/leds/leds-pca9532.h>
-
-  leds: pca9530@60 {
-    compatible = "nxp,pca9530";
-    reg = <0x60>;
-
-    red-power {
-      label = "pca:red:power";
-      type = <PCA9532_TYPE_LED>;
-    };
-    green-power {
-      label = "pca:green:power";
-      type = <PCA9532_TYPE_LED>;
-    };
-    kernel-booting {
-      type = <PCA9532_TYPE_LED>;
-      default-state = "on";
-    };
-    sys-stat {
-      type = <PCA9532_TYPE_LED>;
-      default-state = "keep"; // don't touch, was set by U-Boot
-    };
-  };
-
-For more product information please see the link below:
-http://nxp.com/documents/data_sheet/PCA9532.pdf

Documentation/devicetree/bindings/leds/leds-qcom-lpg.yaml

···
       - qcom,pmc8180c-lpg
       - qcom,pmi8994-lpg
       - qcom,pmi8998-lpg
+      - qcom,pmk8550-pwm
 
   "#pwm-cells":
     const: 2

Documentation/devicetree/bindings/leds/nxp,pca953x.yaml

···
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/leds/nxp,pca953x.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: NXP PCA9532 LED Dimmer
+
+maintainers:
+  - Riku Voipio <[e-mail]>
+
+description: |
+  The PCA9532 family is SMBus I/O expander optimized for dimming LEDs.
+  The PWM support 256 steps.
+
+  For more product information please see the link below:
+    https://www.nxp.com/docs/en/data-sheet/PCA9532.pdf
+
+properties:
+  compatible:
+    enum:
+      - nxp,pca9530
+      - nxp,pca9531
+      - nxp,pca9532
+      - nxp,pca9533
+
+  reg:
+    maxItems: 1
+
+  gpio-controller: true
+
+  '#gpio-cells':
+    const: 2
+
+patternProperties:
+  "^led-[0-9a-z]+$":
+    type: object
+    $ref: common.yaml#
+    unevaluatedProperties: false
+
+    properties:
+      type:
+        description: |
+          Output configuration, see include/dt-bindings/leds/leds-pca9532.h
+        $ref: /schemas/types.yaml#/definitions/uint32
+        default: 0
+        minimum: 0
+        maximum: 4
+
+required:
+  - compatible
+  - reg
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/leds/leds-pca9532.h>
+
+    i2c {
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        led-controller@62 {
+            compatible = "nxp,pca9533";
+            reg = <0x62>;
+
+            led-1 {
+                label = "pca:red:power";
+                type = <PCA9532_TYPE_LED>;
+            };
+
+            led-2 {
+                label = "pca:green:power";
+                type = <PCA9532_TYPE_LED>;
+            };
+
+            led-3 {
+                type = <PCA9532_TYPE_LED>;
+                default-state = "on";
+            };
+
+            led-4 {
+                type = <PCA9532_TYPE_LED>;
+                default-state = "keep";
+            };
+        };
+    };
+
+...

Documentation/devicetree/bindings/leds/qcom,spmi-flash-led.yaml

···
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/leds/qcom,spmi-flash-led.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Flash LED device inside Qualcomm Technologies, Inc. PMICs
+
+maintainers:
+  - Fenglin Wu <[e-mail]>
+
+description: |
+  Flash LED controller is present inside some Qualcomm Technologies, Inc. PMICs.
+  The flash LED module can have different number of LED channels supported
+  e.g. 3 or 4. There are some different registers between them but they can
+  both support maximum current up to 1.5 A per channel and they can also support
+  ganging 2 channels together to supply maximum current up to 2 A. The current
+  will be split symmetrically on each channel and they will be enabled and
+  disabled at the same time.
+
+properties:
+  compatible:
+    items:
+      - enum:
+          - qcom,pm6150l-flash-led
+          - qcom,pm8150c-flash-led
+          - qcom,pm8150l-flash-led
+          - qcom,pm8350c-flash-led
+      - const: qcom,spmi-flash-led
+
+  reg:
+    maxItems: 1
+
+patternProperties:
+  "^led-[0-3]$":
+    type: object
+    $ref: common.yaml#
+    unevaluatedProperties: false
+    description:
+      Represents the physical LED components which are connected to the
+      flash LED channels' output.
+
+    properties:
+      led-sources:
+        description:
+          The HW indices of the flash LED channels that connect to the
+          physical LED
+        allOf:
+          - minItems: 1
+            maxItems: 2
+            items:
+              enum: [1, 2, 3, 4]
+
+      led-max-microamp:
+        anyOf:
+          - minimum: 5000
+            maximum: 500000
+            multipleOf: 5000
+          - minimum: 10000
+            maximum: 1000000
+            multipleOf: 10000
+
+      flash-max-microamp:
+        anyOf:
+          - minimum: 12500
+            maximum: 1500000
+            multipleOf: 12500
+          - minimum: 25000
+            maximum: 2000000
+            multipleOf: 25000
+
+      flash-max-timeout-us:
+        minimum: 10000
+        maximum: 1280000
+        multipleOf: 10000
+
+    required:
+      - led-sources
+      - led-max-microamp
+
+required:
+  - compatible
+  - reg
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/leds/common.h>
+    spmi {
+        #address-cells = <1>;
+        #size-cells = <0>;
+        led-controller@ee00 {
+            compatible = "qcom,pm8350c-flash-led", "qcom,spmi-flash-led";
+            reg = <0xee00>;
+
+            led-0 {
+                function = LED_FUNCTION_FLASH;
+                color = <LED_COLOR_ID_WHITE>;
+                led-sources = <1>, <4>;
+                led-max-microamp = <300000>;
+                flash-max-microamp = <2000000>;
+                flash-max-timeout-us = <1280000>;
+                function-enumerator = <0>;
+            };
+
+            led-1 {
+                function = LED_FUNCTION_FLASH;
+                color = <LED_COLOR_ID_YELLOW>;
+                led-sources = <2>, <3>;
+                led-max-microamp = <300000>;
+                flash-max-microamp = <2000000>;
+                flash-max-timeout-us = <1280000>;
+                function-enumerator = <1>;
+            };
+        };
+    };

Documentation/devicetree/bindings/leds/rohm,bd2606mvv.yaml

···
+# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/leds/rohm,bd2606mvv.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: ROHM BD2606MVV LED controller
+
+maintainers:
+  - Andreas Kemnade <[e-mail]>
+
+description:
+  The BD2606 MVV is a programmable LED controller connected via I2C that can
+  drive 6 separate lines. Each of them can be individually switched on and off,
+  but the brightness setting is shared between pairs of them.
+
+  Datasheet is available at
+  https://fscdn.rohm.com/en/products/databook/datasheet/ic/power/led_driver/bd2606mvv_1-e.pdf
+
+properties:
+  compatible:
+    const: rohm,bd2606mvv
+
+  reg:
+    maxItems: 1
+
+  "#address-cells":
+    const: 1
+
+  "#size-cells":
+    const: 0
+
+  enable-gpios:
+    maxItems: 1
+    description: GPIO pin to enable/disable the device.
+
+patternProperties:
+  "^led@[0-6]$":
+    type: object
+    $ref: common.yaml#
+    unevaluatedProperties: false
+
+    properties:
+      reg:
+        minimum: 0
+        maximum: 6
+
+    required:
+      - reg
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/leds/common.h>
+
+    i2c {
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        led-controller@66 {
+            compatible = "rohm,bd2606mvv";
+            reg = <0x66>;
+            #address-cells = <1>;
+            #size-cells = <0>;
+
+            led@0 {
+                reg = <0x0>;
+                color = <LED_COLOR_ID_RED>;
+                function = LED_FUNCTION_POWER;
+            };
+
+            led@2 {
+                reg = <0x2>;
+                color = <LED_COLOR_ID_WHITE>;
+                function = LED_FUNCTION_STATUS;
+            };
+        };
+    };
+
+...

Documentation/leds/index.rst

···
    leds-lp5562
    leds-lp55xx
    leds-mlxcpld
+   leds-mt6370-rgb
    leds-sc27xx
    leds-qcom-lpg

Documentation/leds/leds-mt6370-rgb.rst

···
+.. SPDX-License-Identifier: GPL-2.0
+
+=========================================
+The device for Mediatek MT6370 RGB LED
+=========================================
+
+Description
+-----------
+
+The MT6370 integrates a four-channel RGB LED driver, designed to provide a
+variety of lighting effect for mobile device applications. The RGB LED devices
+includes a smart LED string controller and it can drive 3 channels of LEDs with
+a sink current up to 24mA and a CHG_VIN power good indicator LED with sink
+current up to 6mA. It provides three operation modes for RGB LEDs:
+PWM Dimming mode, breath pattern mode, and constant current mode. The device
+can increase or decrease the brightness of the RGB LED via an I2C interface.
+
+The breath pattern for a channel can be programmed using the "pattern" trigger,
+using the hw_pattern attribute.
+
+/sys/class/leds/<led>/hw_pattern
+--------------------------------
+
+Specify a hardware breath pattern for a MT6370 RGB LED.
+
+The breath pattern is a series of timing pairs, with the hold-time expressed in
+milliseconds. And the brightness is controlled by
+'/sys/class/leds/<led>/brightness'. The pattern doesn't include the brightness
+setting. Hardware pattern only controls the timing for each pattern stage
+depending on the current brightness setting.
+
+Pattern diagram::
+
+         "0 Tr1 0 Tr2 0 Tf1 0 Tf2 0 Ton 0 Toff" --> '0' for dummy brightness code
+
+          ^
+          |           ============
+          |          /            \                                /
+    Icurr |         /              \                              /
+          |        /                \                            /
+          |       /                  \                          /   .....repeat
+          |      /                    \                        /
+          |   ---                      ---                  ---
+          |---                            ---            ---
+          +----------------------------------============------------> Time
+          < Tr1><Tr2><   Ton    ><Tf1><Tf2 ><  Toff    >< Tr1><Tr2>
+
+Timing description:
+
+  * Tr1:    First rising time for 0% - 30% load.
+  * Tr2:    Second rising time for 31% - 100% load.
+  * Ton:    On time for 100% load.
+  * Tf1:    First falling time for 100% - 31% load.
+  * Tf2:    Second falling time for 30% to 0% load.
+  * Toff:   Off time for 0% load.
+
+  * Tr1/Tr2/Tf1/Tf2/Ton: 125ms to 3125ms, 200ms per step.
+  * Toff: 250ms to 6250ms, 400ms per step.
+
+Pattern example::
+
+       "0 125 0 125 0 125 0 125 0 625 0 1050"
+
+This Will configure Tr1/Tr2/Tf1/Tf2 to 125m, Ton to 625ms, and Toff to 1050ms.

Documentation/leds/ledtrig-oneshot.rst

···
 This is a LED trigger useful for signaling the user of an event where there are
 no clear trap points to put standard led-on and led-off settings.  Using this
 trigger, the application needs only to signal the trigger when an event has
-happened, than the trigger turns the LED on and than keeps it off for a
+happened, then the trigger turns the LED on and then keeps it off for a
 specified amount of time.
 
 This trigger is meant to be usable both for sporadic and dense events.  In the

MAINTAINERS

···
 S:	Maintained
 T:	git git://git.kernel.org/pub/scm/linux/kernel/git/pavel/linux-leds.git
 F:	Documentation/devicetree/bindings/leds/
+F:	Documentation/leds/
 F:	drivers/leds/
 F:	include/dt-bindings/leds/
 F:	include/linux/leds.h

drivers/leds/Kconfig

···
 	help
 	  This option enables support for regulator driven LEDs.
 
+config LEDS_BD2606MVV
+	tristate "LED driver for BD2606MVV"
+	depends on LEDS_CLASS
+	depends on I2C
+	select REGMAP_I2C
+	help
+	  This option enables support for BD2606MVV LED driver chips
+	  accessed via the I2C bus. It supports setting brightness, with
+	  the limitiation that there are groups of two channels sharing
+	  a brightness setting, but not the on/off setting.
+
+	  To compile this driver as a module, choose M here: the module will
+	  be called leds-bd2606mvv.
+
 config LEDS_BD2802
 	tristate "LED driver for BD2802 RGB LED"
 	depends on LEDS_CLASS
···
 config LEDS_TI_LMU_COMMON
 	tristate "LED driver for TI LMU"
 	depends on LEDS_CLASS
-	depends on REGMAP
+	select REGMAP
 	help
 	  Say Y to enable the LED driver for TI LMU devices.
 	  This supports common features between the TI LM3532, LM3631, LM3632,

drivers/leds/Makefile

···
 obj-$(CONFIG_LEDS_AW2013)		+= leds-aw2013.o
 obj-$(CONFIG_LEDS_BCM6328)		+= leds-bcm6328.o
 obj-$(CONFIG_LEDS_BCM6358)		+= leds-bcm6358.o
+obj-$(CONFIG_LEDS_BD2606MVV)		+= leds-bd2606mvv.o
 obj-$(CONFIG_LEDS_BD2802)		+= leds-bd2802.o
 obj-$(CONFIG_LEDS_BLINKM)		+= leds-blinkm.o
 obj-$(CONFIG_LEDS_CLEVO_MAIL)		+= leds-clevo-mail.o

drivers/leds/flash/Kconfig

···
 	  Independent current sources supply for each flash LED support torch
 	  and strobe mode.
 
+config LEDS_MT6370_FLASH
+	tristate "Flash LED Support for MediaTek MT6370 PMIC"
+	depends on LEDS_CLASS
+	depends on V4L2_FLASH_LED_CLASS || !V4L2_FLASH_LED_CLASS
+	depends on MFD_MT6370
+	help
+	  Support 2 channels and torch/strobe mode.
+	  Say Y here to enable support for
+	  MT6370_FLASH_LED device.
+
+	  This driver can also be built as a module. If so, the module
+	  will be called "leds-mt6370-flash".
+
+config LEDS_QCOM_FLASH
+	tristate "LED support for flash module inside Qualcomm Technologies, Inc. PMIC"
+	depends on MFD_SPMI_PMIC || COMPILE_TEST
+	depends on LEDS_CLASS && OF
+	depends on V4L2_FLASH_LED_CLASS || !V4L2_FLASH_LED_CLASS
+	select REGMAP
+	help
+	  This option enables support for the flash module found in Qualcomm
+	  Technologies, Inc. PMICs. The flash module can have 3 or 4 flash LED
+	  channels and each channel is programmable to support up to 1.5 A full
+	  scale current. It also supports connecting two channels' output together
+	  to supply one LED component to achieve current up to 2 A. In such case,
+	  the total LED current will be split symmetrically on each channel and
+	  they will be enabled/disabled at the same time.
+
 config LEDS_RT4505
 	tristate "LED support for RT4505 flashlight controller"
 	depends on I2C && OF

drivers/leds/flash/Makefile

···
 # SPDX-License-Identifier: GPL-2.0
 
 obj-$(CONFIG_LEDS_MT6360)	+= leds-mt6360.o
+obj-$(CONFIG_LEDS_MT6370_FLASH)	+= leds-mt6370-flash.o
 obj-$(CONFIG_LEDS_AAT1290)	+= leds-aat1290.o
 obj-$(CONFIG_LEDS_AS3645A)	+= leds-as3645a.o
 obj-$(CONFIG_LEDS_KTD2692)	+= leds-ktd2692.o
 obj-$(CONFIG_LEDS_LM3601X)	+= leds-lm3601x.o
 obj-$(CONFIG_LEDS_MAX77693)	+= leds-max77693.o
+obj-$(CONFIG_LEDS_QCOM_FLASH)	+= leds-qcom-flash.o
 obj-$(CONFIG_LEDS_RT4505)	+= leds-rt4505.o
 obj-$(CONFIG_LEDS_RT8515)	+= leds-rt8515.o
 obj-$(CONFIG_LEDS_SGM3140)	+= leds-sgm3140.o

drivers/leds/flash/leds-mt6370-flash.c

···
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (C) 2023 Richtek Technology Corp.
+ *
+ * Authors:
+ *   Alice Chen <[e-mail]>
+ *   ChiYuan Huang <[e-mail]>
+ */
+
+#include <linux/bitops.h>
+#include <linux/delay.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/kernel.h>
+#include <linux/led-class-flash.h>
+#include <linux/module.h>
+#include <linux/mutex.h>
+#include <linux/platform_device.h>
+#include <linux/property.h>
+#include <linux/regmap.h>
+
+#include <media/v4l2-flash-led-class.h>
+
+enum {
+	MT6370_LED_FLASH1 = 0,
+	MT6370_LED_FLASH2,
+	MT6370_MAX_LEDS
+};
+
+/* Virtual definition for multicolor */
+
+#define MT6370_REG_FLEDEN		0x17E
+#define MT6370_REG_STRBTO		0x173
+#define MT6370_REG_CHGSTAT2		0x1D1
+#define MT6370_REG_FLEDSTAT1		0x1D9
+#define MT6370_REG_FLEDISTRB(_id)	(0x174 + 4 * (_id))
+#define MT6370_REG_FLEDITOR(_id)	(0x175 + 4 * (_id))
+#define MT6370_ITORCH_MASK		GENMASK(4, 0)
+#define MT6370_ISTROBE_MASK		GENMASK(6, 0)
+#define MT6370_STRBTO_MASK		GENMASK(6, 0)
+#define MT6370_TORCHEN_MASK		BIT(3)
+#define MT6370_STROBEN_MASK		BIT(2)
+#define MT6370_FLCSEN_MASK(_id)		BIT(MT6370_LED_FLASH2 - (_id))
+#define MT6370_FLCSEN_MASK_ALL		GENMASK(1, 0)
+#define MT6370_FLEDCHGVINOVP_MASK	BIT(3)
+#define MT6370_FLED1STRBTO_MASK		BIT(11)
+#define MT6370_FLED2STRBTO_MASK		BIT(10)
+#define MT6370_FLED1STRB_MASK		BIT(9)
+#define MT6370_FLED2STRB_MASK		BIT(8)
+#define MT6370_FLED1SHORT_MASK		BIT(7)
+#define MT6370_FLED2SHORT_MASK		BIT(6)
+#define MT6370_FLEDLVF_MASK		BIT(3)
+
+#define MT6370_LED_JOINT		2
+#define MT6370_RANGE_FLED_REG		4
+#define MT6370_ITORCH_MIN_uA		25000
+#define MT6370_ITORCH_STEP_uA		12500
+#define MT6370_ITORCH_MAX_uA		400000
+#define MT6370_ITORCH_DOUBLE_MAX_uA	800000
+#define MT6370_ISTRB_MIN_uA		50000
+#define MT6370_ISTRB_STEP_uA		12500
+#define MT6370_ISTRB_MAX_uA		1500000
+#define MT6370_ISTRB_DOUBLE_MAX_uA	3000000
+#define MT6370_STRBTO_MIN_US		64000
+#define MT6370_STRBTO_STEP_US		32000
+#define MT6370_STRBTO_MAX_US		2432000
+
+#define to_mt6370_led(ptr, member) container_of(ptr, struct mt6370_led, member)
+
+struct mt6370_led {
+	struct led_classdev_flash flash;
+	struct v4l2_flash *v4l2_flash;
+	struct mt6370_priv *priv;
+	u8 led_no;
+};
+
+struct mt6370_priv {
+	struct regmap *regmap;
+	struct mutex lock;
+	unsigned int fled_strobe_used;
+	unsigned int fled_torch_used;
+	unsigned int leds_active;
+	unsigned int leds_count;
+	struct mt6370_led leds[];
+};
+
+static int mt6370_torch_brightness_set(struct led_classdev *lcdev, enum led_brightness level)
+{
+	struct mt6370_led *led = to_mt6370_led(lcdev, flash.led_cdev);
+	struct mt6370_priv *priv = led->priv;
+	u32 led_enable_mask = led->led_no == MT6370_LED_JOINT ? MT6370_FLCSEN_MASK_ALL :
+			      MT6370_FLCSEN_MASK(led->led_no);
+	u32 enable_mask = MT6370_TORCHEN_MASK | led_enable_mask;
+	u32 val = level ? led_enable_mask : 0;
+	u32 curr;
+	int ret, i;
+
+	mutex_lock(&priv->lock);
+
+	/*
+	 * There is only one set of flash control logic, and this flag is used to check if 'strobe'
+	 * is currently being used.
+	 */
+	if (priv->fled_strobe_used) {
+		dev_warn(lcdev->dev, "Please disable strobe first [%d]\n", priv->fled_strobe_used);
+		ret = -EBUSY;
+		goto unlock;
+	}
+
+	if (level)
+		curr = priv->fled_torch_used | BIT(led->led_no);
+	else
+		curr = priv->fled_torch_used & ~BIT(led->led_no);
+
+	if (curr)
+		val |= MT6370_TORCHEN_MASK;
+
+	if (level) {
+		level -= 1;
+		if (led->led_no == MT6370_LED_JOINT) {
+			u32 flevel[MT6370_MAX_LEDS];
+
+			/*
+			 * There're two flash channels in MT6370. If joint flash output is used,
+			 * torch current will be averaged output from both channels.
+			 */
+			flevel[0] = level / 2;
+			flevel[1] = level - flevel[0];
+			for (i = 0; i < MT6370_MAX_LEDS; i++) {
+				ret = regmap_update_bits(priv->regmap, MT6370_REG_FLEDITOR(i),
+							 MT6370_ITORCH_MASK, flevel[i]);
+				if (ret)
+					goto unlock;
+			}
+		} else {
+			ret = regmap_update_bits(priv->regmap, MT6370_REG_FLEDITOR(led->led_no),
+						 MT6370_ITORCH_MASK, level);
+			if (ret)
+				goto unlock;
+		}
+	}
+
+	ret = regmap_update_bits(priv->regmap, MT6370_REG_FLEDEN, enable_mask, val);
+	if (ret)
+		goto unlock;
+
+	priv->fled_torch_used = curr;
+
+unlock:
+	mutex_unlock(&priv->lock);
+	return ret;
+}
+
+static int mt6370_flash_brightness_set(struct led_classdev_flash *fl_cdev, u32 brightness)
+{
+	/*
+	 * Because of the current spikes when turning on the flash, the brightness should be kept
+	 * by the LED framework. This empty function is used to prevent checking failure when
+	 * led_classdev_flash registers ops.
+	 */
+	return 0;
+}
+
+static int _mt6370_flash_brightness_set(struct led_classdev_flash *fl_cdev, u32 brightness)
+{
+	struct mt6370_led *led = to_mt6370_led(fl_cdev, flash);
+	struct mt6370_priv *priv = led->priv;
+	struct led_flash_setting *setting = &fl_cdev->brightness;
+	u32 val = (brightness - setting->min) / setting->step;
+	int ret, i;
+
+	if (led->led_no == MT6370_LED_JOINT) {
+		u32 flevel[MT6370_MAX_LEDS];
+
+		/*
+		 * There're two flash channels in MT6370. If joint flash output is used, storbe
+		 * current will be averaged output from both channels.
+		 */
+		flevel[0] = val / 2;
+		flevel[1] = val - flevel[0];
+		for (i = 0; i < MT6370_MAX_LEDS; i++) {
+			ret = regmap_update_bits(priv->regmap, MT6370_REG_FLEDISTRB(i),
+						 MT6370_ISTROBE_MASK, flevel[i]);
+			if (ret)
+				break;
+		}
+	} else {
+		ret = regmap_update_bits(priv->regmap, MT6370_REG_FLEDISTRB(led->led_no),
+					 MT6370_ISTROBE_MASK, val);
+	}
+
+	return ret;
+}
+
+static int mt6370_strobe_set(struct led_classdev_flash *fl_cdev, bool state)
+{
+	struct mt6370_led *led = to_mt6370_led(fl_cdev, flash);
+	struct mt6370_priv *priv = led->priv;
+	struct led_classdev *lcdev = &fl_cdev->led_cdev;
+	struct led_flash_setting *s = &fl_cdev->brightness;
+	u32 led_enable_mask = led->led_no == MT6370_LED_JOINT ? MT6370_FLCSEN_MASK_ALL :
+			      MT6370_FLCSEN_MASK(led->led_no);
+	u32 enable_mask = MT6370_STROBEN_MASK | led_enable_mask;
+	u32 val = state ? led_enable_mask : 0;
+	u32 curr;
+	int ret;
+
+	mutex_lock(&priv->lock);
+
+	/*
+	 * There is only one set of flash control logic, and this flag is used to check if 'torch'
+	 * is currently being used.
+	 */
+	if (priv->fled_torch_used) {
+		dev_warn(lcdev->dev, "Please disable torch first [0x%x]\n", priv->fled_torch_used);
+		ret = -EBUSY;
+		goto unlock;
+	}
+
+	if (state)
+		curr = priv->fled_strobe_used | BIT(led->led_no);
+	else
+		curr = priv->fled_strobe_used & ~BIT(led->led_no);
+
+	if (curr)
+		val |= MT6370_STROBEN_MASK;
+
+	ret = regmap_update_bits(priv->regmap, MT6370_REG_FLEDEN, enable_mask, val);
+	if (ret) {
+		dev_err(lcdev->dev, "[%d] control current source %d fail\n", led->led_no, state);
+		goto unlock;
+	}
+
+	/*
+	 * If the flash needs to turn on, configure the flash current to ramp up to the setting
+	 * value. Otherwise, always revert to the minimum one.
+	 */
+	ret = _mt6370_flash_brightness_set(fl_cdev, state ? s->val : s->min);
+	if (ret) {
+		dev_err(lcdev->dev, "[%d] Failed to set brightness\n", led->led_no);
+		goto unlock;
+	}
+
+	/*
+	 * For the flash to turn on/off, we must wait for HW ramping up/down time 5ms/500us to
+	 * prevent the unexpected problem.
+	 */
+	if (!priv->fled_strobe_used && curr)
+		usleep_range(5000, 6000);
+	else if (priv->fled_strobe_used && !curr)
+		usleep_range(500, 600);
+
+	priv->fled_strobe_used = curr;
+
+unlock:
+	mutex_unlock(&priv->lock);
+	return ret;
+}
+
+static int mt6370_strobe_get(struct led_classdev_flash *fl_cdev, bool *state)
+{
+	struct mt6370_led *led = to_mt6370_led(fl_cdev, flash);
+	struct mt6370_priv *priv = led->priv;
+
+	mutex_lock(&priv->lock);
+	*state = !!(priv->fled_strobe_used & BIT(led->led_no));
+	mutex_unlock(&priv->lock);
+
+	return 0;
+}
+
+static int mt6370_timeout_set(struct led_classdev_flash *fl_cdev, u32 timeout)
+{
+	struct mt6370_led *led = to_mt6370_led(fl_cdev, flash);
+	struct mt6370_priv *priv = led->priv;
+	struct led_flash_setting *s = &fl_cdev->timeout;
+	u32 val = (timeout - s->min) / s->step;
+
+	return regmap_update_bits(priv->regmap, MT6370_REG_STRBTO, MT6370_STRBTO_MASK, val);
+}
+
+static int mt6370_fault_get(struct led_classdev_flash *fl_cdev, u32 *fault)
+{
+	struct mt6370_led *led = to_mt6370_led(fl_cdev, flash);
+	struct mt6370_priv *priv = led->priv;
+	u16 fled_stat;
+	unsigned int chg_stat, strobe_timeout_mask, fled_short_mask;
+	u32 rfault = 0;
+	int ret;
+
+	ret = regmap_read(priv->regmap, MT6370_REG_CHGSTAT2, &chg_stat);
+	if (ret)
+		return ret;
+
+	ret = regmap_raw_read(priv->regmap, MT6370_REG_FLEDSTAT1, &fled_stat, sizeof(fled_stat));
+	if (ret)
+		return ret;
+
+	switch (led->led_no) {
+	case MT6370_LED_FLASH1:
+		strobe_timeout_mask = MT6370_FLED1STRBTO_MASK;
+		fled_short_mask = MT6370_FLED1SHORT_MASK;
+		break;
+
+	case MT6370_LED_FLASH2:
+		strobe_timeout_mask = MT6370_FLED2STRBTO_MASK;
+		fled_short_mask = MT6370_FLED2SHORT_MASK;
+		break;
+
+	case MT6370_LED_JOINT:
+		strobe_timeout_mask = MT6370_FLED1STRBTO_MASK | MT6370_FLED2STRBTO_MASK;
+		fled_short_mask = MT6370_FLED1SHORT_MASK | MT6370_FLED2SHORT_MASK;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	if (chg_stat & MT6370_FLEDCHGVINOVP_MASK)
+		rfault |= LED_FAULT_INPUT_VOLTAGE;
+
+	if (fled_stat & strobe_timeout_mask)
+		rfault |= LED_FAULT_TIMEOUT;
+
+	if (fled_stat & fled_short_mask)
+		rfault |= LED_FAULT_SHORT_CIRCUIT;
+
+	if (fled_stat & MT6370_FLEDLVF_MASK)
+		rfault |= LED_FAULT_UNDER_VOLTAGE;
+
+	*fault = rfault;
+	return ret;
+}
+
+static const struct led_flash_ops mt6370_flash_ops = {
+	.flash_brightness_set = mt6370_flash_brightness_set,
+	.strobe_set = mt6370_strobe_set,
+	.strobe_get = mt6370_strobe_get,
+	.timeout_set = mt6370_timeout_set,
+	.fault_get = mt6370_fault_get,
+};
+
+#if IS_ENABLED(CONFIG_V4L2_FLASH_LED_CLASS)
+static int mt6370_flash_external_strobe_set(struct v4l2_flash *v4l2_flash,
+					    bool enable)
+{
+	struct led_classdev_flash *flash = v4l2_flash->fled_cdev;
+	struct mt6370_led *led = to_mt6370_led(flash, flash);
+	struct mt6370_priv *priv = led->priv;
+	u32 mask = led->led_no == MT6370_LED_JOINT ? MT6370_FLCSEN_MASK_ALL :
+		   MT6370_FLCSEN_MASK(led->led_no);
+	u32 val = enable ? mask : 0;
+	int ret;
+
+	mutex_lock(&priv->lock);
+
+	ret = regmap_update_bits(priv->regmap, MT6370_REG_FLEDEN, mask, val);
+	if (ret)
+		goto unlock;
+
+	if (enable)
+		priv->fled_strobe_used |= BIT(led->led_no);
+	else
+		priv->fled_strobe_used &= ~BIT(led->led_no);
+
+unlock:
+	mutex_unlock(&priv->lock);
+	return ret;
+}
+
+static const struct v4l2_flash_ops v4l2_flash_ops = {
+	.external_strobe_set = mt6370_flash_external_strobe_set,
+};
+
+static void mt6370_init_v4l2_flash_config(struct mt6370_led *led, struct v4l2_flash_config *cfg)
+{
+	struct led_classdev *lcdev;
+	struct led_flash_setting *s = &cfg->intensity;
+
+	lcdev = &led->flash.led_cdev;
+
+	s->min = MT6370_ITORCH_MIN_uA;
+	s->step = MT6370_ITORCH_STEP_uA;
+	s->val = s->max = s->min + (lcdev->max_brightness - 1) * s->step;
+
+	cfg->has_external_strobe = 1;
+	strscpy(cfg->dev_name, dev_name(lcdev->dev), sizeof(cfg->dev_name));
+
+	cfg->flash_faults = LED_FAULT_SHORT_CIRCUIT | LED_FAULT_TIMEOUT |
+			    LED_FAULT_INPUT_VOLTAGE | LED_FAULT_UNDER_VOLTAGE;
+}
+#else
+static const struct v4l2_flash_ops v4l2_flash_ops;
+static void mt6370_init_v4l2_flash_config(struct mt6370_led *led, struct v4l2_flash_config *cfg)
+{
+}
+#endif
+
+static void mt6370_v4l2_flash_release(void *v4l2_flash)
+{
+	v4l2_flash_release(v4l2_flash);
+}
+
+static int mt6370_led_register(struct device *parent, struct mt6370_led *led,
+			       struct fwnode_handle *fwnode)
+{
+	struct led_init_data init_data = { .fwnode = fwnode };
+	struct v4l2_flash_config v4l2_config = {};
+	int ret;
+
+	ret = devm_led_classdev_flash_register_ext(parent, &led->flash, &init_data);
+	if (ret)
+		return dev_err_probe(parent, ret, "Couldn't register flash %d\n", led->led_no);
+
+	mt6370_init_v4l2_flash_config(led, &v4l2_config);
+	led->v4l2_flash = v4l2_flash_init(parent, fwnode, &led->flash, &v4l2_flash_ops,
+					  &v4l2_config);
+	if (IS_ERR(led->v4l2_flash))
+		return dev_err_probe(parent, PTR_ERR(led->v4l2_flash),
+				     "Failed to register %d v4l2 sd\n", led->led_no);
+
+	return devm_add_action_or_reset(parent, mt6370_v4l2_flash_release, led->v4l2_flash);
+}
+
+static u32 mt6370_clamp(u32 val, u32 min, u32 max, u32 step)
+{
+	u32 retval;
+
+	retval = clamp_val(val, min, max);
+	if (step > 1)
+		retval = rounddown(retval - min, step) + min;
+
+	return retval;
+}
+
+static int mt6370_init_flash_properties(struct device *dev, struct mt6370_led *led,
+					struct fwnode_handle *fwnode)
+{
+	struct led_classdev_flash *flash = &led->flash;
+	struct led_classdev *lcdev = &flash->led_cdev;
+	struct mt6370_priv *priv = led->priv;
+	struct led_flash_setting *s;
+	u32 sources[MT6370_MAX_LEDS];
+	u32 max_ua, val;
+	int i, ret, num;
+
+	num = fwnode_property_count_u32(fwnode, "led-sources");
+	if (num < 1)
+		return dev_err_probe(dev, -EINVAL,
+				     "Not specified or wrong number of led-sources\n");
+
+	ret = fwnode_property_read_u32_array(fwnode, "led-sources", sources, num);
+	if (ret)
+		return ret;
+
+	for (i = 0; i < num; i++) {
+		if (sources[i] >= MT6370_MAX_LEDS)
+			return -EINVAL;
+		if (priv->leds_active & BIT(sources[i]))
+			return -EINVAL;
+		priv->leds_active |= BIT(sources[i]);
+	}
+
+	/* If both channels are specified in 'led-sources', joint flash output mode is used */
+	led->led_no = num == 2 ? MT6370_LED_JOINT : sources[0];
+
+	max_ua = num == 2 ? MT6370_ITORCH_DOUBLE_MAX_uA : MT6370_ITORCH_MAX_uA;
+	val = MT6370_ITORCH_MIN_uA;
+	ret = fwnode_property_read_u32(fwnode, "led-max-microamp", &val);
+	if (!ret)
+		val = mt6370_clamp(val, MT6370_ITORCH_MIN_uA, max_ua, MT6370_ITORCH_STEP_uA);
+
+	lcdev->max_brightness = (val - MT6370_ITORCH_MIN_uA) / MT6370_ITORCH_STEP_uA + 1;
+	lcdev->brightness_set_blocking = mt6370_torch_brightness_set;
+	lcdev->flags |= LED_DEV_CAP_FLASH;
+
+	max_ua = num == 2 ? MT6370_ISTRB_DOUBLE_MAX_uA : MT6370_ISTRB_MAX_uA;
+	val = MT6370_ISTRB_MIN_uA;
+	ret = fwnode_property_read_u32(fwnode, "flash-max-microamp", &val);
+	if (!ret)
+		val = mt6370_clamp(val, MT6370_ISTRB_MIN_uA, max_ua, MT6370_ISTRB_STEP_uA);
+
+	s = &flash->brightness;
+	s->min = MT6370_ISTRB_MIN_uA;
+	s->step = MT6370_ISTRB_STEP_uA;
+	s->val = s->max = val;
+
+	/* Always configure to the minimum level when off to prevent flash current spikes. */
+	ret = _mt6370_flash_brightness_set(flash, s->min);
+	if (ret)
+		return ret;
+
+	val = MT6370_STRBTO_MIN_US;
+	ret = fwnode_property_read_u32(fwnode, "flash-max-timeout-us", &val);
+	if (!ret)
+		val = mt6370_clamp(val, MT6370_STRBTO_MIN_US, MT6370_STRBTO_MAX_US,
+				   MT6370_STRBTO_STEP_US);
+
+	s = &flash->timeout;
+	s->min = MT6370_STRBTO_MIN_US;
+	s->step = MT6370_STRBTO_STEP_US;
+	s->val = s->max = val;
+
+	flash->ops = &mt6370_flash_ops;
+
+	return 0;
+}
+
+static int mt6370_led_probe(struct platform_device *pdev)
+{
+	struct device *dev = &pdev->dev;
+	struct mt6370_priv *priv;
+	struct fwnode_handle *child;
+	size_t count;
+	int i = 0, ret;
+
+	count = device_get_child_node_count(dev);
+	if (!count || count > MT6370_MAX_LEDS)
+		return dev_err_probe(dev, -EINVAL,
+		       "No child node or node count over max led number %zu\n", count);
+
+	priv = devm_kzalloc(dev, struct_size(priv, leds, count), GFP_KERNEL);
+	if (!priv)
+		return -ENOMEM;
+
+	priv->leds_count = count;
+	mutex_init(&priv->lock);
+
+	priv->regmap = dev_get_regmap(dev->parent, NULL);
+	if (!priv->regmap)
+		return dev_err_probe(dev, -ENODEV, "Failed to get parent regmap\n");
+
+	device_for_each_child_node(dev, child) {
+		struct mt6370_led *led = priv->leds + i;
+
+		led->priv = priv;
+
+		ret = mt6370_init_flash_properties(dev, led, child);
+		if (ret) {
+			fwnode_handle_put(child);
+			return ret;
+		}
+
+		ret = mt6370_led_register(dev, led, child);
+		if (ret) {
+			fwnode_handle_put(child);
+			return ret;
+		}
+
+		i++;
+	}
+
+	return 0;
+}
+
+static const struct of_device_id mt6370_led_of_id[] = {
+	{ .compatible = "mediatek,mt6370-flashlight" },
+	{}
+};
+MODULE_DEVICE_TABLE(of, mt6370_led_of_id);
+
+static struct platform_driver mt6370_led_driver = {
+	.driver = {
+		.name = "mt6370-flashlight",
+		.of_match_table = mt6370_led_of_id,
+	},
+	.probe = mt6370_led_probe,
+};
+module_platform_driver(mt6370_led_driver);
+
+MODULE_AUTHOR("Alice Chen <[e-mail]>");
+MODULE_AUTHOR("ChiYuan Huang <[e-mail]>");
+MODULE_DESCRIPTION("MT6370 FLASH LED Driver");
+MODULE_LICENSE("GPL");

drivers/leds/flash/leds-qcom-flash.c

···
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (c) 2022 Qualcomm Innovation Center, Inc. All rights reserved.
+ */
+
+#include <linux/bitfield.h>
+#include <linux/bits.h>
+#include <linux/leds.h>
+#include <linux/led-class-flash.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/property.h>
+#include <linux/regmap.h>
+#include <media/v4l2-flash-led-class.h>
+
+/* registers definitions */
+#define FLASH_TYPE_REG			0x04
+#define FLASH_TYPE_VAL			0x18
+
+#define FLASH_SUBTYPE_REG		0x05
+#define FLASH_SUBTYPE_3CH_VAL		0x04
+#define FLASH_SUBTYPE_4CH_VAL		0x07
+
+#define FLASH_STS_3CH_OTST1		BIT(0)
+#define FLASH_STS_3CH_OTST2		BIT(1)
+#define FLASH_STS_3CH_OTST3		BIT(2)
+#define FLASH_STS_3CH_BOB_THM_OVERLOAD	BIT(3)
+#define FLASH_STS_3CH_VPH_DROOP		BIT(4)
+#define FLASH_STS_3CH_BOB_ILIM_S1	BIT(5)
+#define FLASH_STS_3CH_BOB_ILIM_S2	BIT(6)
+#define FLASH_STS_3CH_BCL_IBAT		BIT(7)
+
+#define FLASH_STS_4CH_VPH_LOW		BIT(0)
+#define FLASH_STS_4CH_BCL_IBAT		BIT(1)
+#define FLASH_STS_4CH_BOB_ILIM_S1	BIT(2)
+#define FLASH_STS_4CH_BOB_ILIM_S2	BIT(3)
+#define FLASH_STS_4CH_OTST2		BIT(4)
+#define FLASH_STS_4CH_OTST1		BIT(5)
+#define FLASH_STS_4CHG_BOB_THM_OVERLOAD	BIT(6)
+
+#define FLASH_TIMER_EN_BIT		BIT(7)
+#define FLASH_TIMER_VAL_MASK		GENMASK(6, 0)
+#define FLASH_TIMER_STEP_MS		10
+
+#define FLASH_STROBE_HW_SW_SEL_BIT	BIT(2)
+#define SW_STROBE_VAL			0
+#define HW_STROBE_VAL			1
+#define FLASH_HW_STROBE_TRIGGER_SEL_BIT	BIT(1)
+#define STROBE_LEVEL_TRIGGER_VAL	0
+#define STROBE_EDGE_TRIGGER_VAL		1
+#define FLASH_STROBE_POLARITY_BIT	BIT(0)
+#define STROBE_ACTIVE_HIGH_VAL		1
+
+#define FLASH_IRES_MASK_4CH		BIT(0)
+#define FLASH_IRES_MASK_3CH		GENMASK(1, 0)
+#define FLASH_IRES_12P5MA_VAL		0
+#define FLASH_IRES_5MA_VAL_4CH		1
+#define FLASH_IRES_5MA_VAL_3CH		3
+
+/* constants */
+#define FLASH_CURRENT_MAX_UA		1500000
+#define TORCH_CURRENT_MAX_UA		500000
+#define FLASH_TOTAL_CURRENT_MAX_UA	2000000
+#define FLASH_CURRENT_DEFAULT_UA	1000000
+#define TORCH_CURRENT_DEFAULT_UA	200000
+
+#define TORCH_IRES_UA			5000
+#define FLASH_IRES_UA			12500
+
+#define FLASH_TIMEOUT_MAX_US		1280000
+#define FLASH_TIMEOUT_STEP_US		10000
+
+#define UA_PER_MA			1000
+
+enum hw_type {
+	QCOM_MVFLASH_3CH,
+	QCOM_MVFLASH_4CH,
+};
+
+enum led_mode {
+	FLASH_MODE,
+	TORCH_MODE,
+};
+
+enum led_strobe {
+	SW_STROBE,
+	HW_STROBE,
+};
+
+enum {
+	REG_STATUS1,
+	REG_STATUS2,
+	REG_STATUS3,
+	REG_CHAN_TIMER,
+	REG_ITARGET,
+	REG_MODULE_EN,
+	REG_IRESOLUTION,
+	REG_CHAN_STROBE,
+	REG_CHAN_EN,
+	REG_MAX_COUNT,
+};
+
+static struct reg_field mvflash_3ch_regs[REG_MAX_COUNT] = {
+	REG_FIELD(0x08, 0, 7),			/* status1	*/
+	REG_FIELD(0x09, 0, 7),                  /* status2	*/
+	REG_FIELD(0x0a, 0, 7),                  /* status3	*/
+	REG_FIELD_ID(0x40, 0, 7, 3, 1),         /* chan_timer	*/
+	REG_FIELD_ID(0x43, 0, 6, 3, 1),         /* itarget	*/
+	REG_FIELD(0x46, 7, 7),                  /* module_en	*/
+	REG_FIELD(0x47, 0, 5),                  /* iresolution	*/
+	REG_FIELD_ID(0x49, 0, 2, 3, 1),         /* chan_strobe	*/
+	REG_FIELD(0x4c, 0, 2),                  /* chan_en	*/
+};
+
+static struct reg_field mvflash_4ch_regs[REG_MAX_COUNT] = {
+	REG_FIELD(0x06, 0, 7),			/* status1	*/
+	REG_FIELD(0x07, 0, 6),			/* status2	*/
+	REG_FIELD(0x09, 0, 7),			/* status3	*/
+	REG_FIELD_ID(0x3e, 0, 7, 4, 1),		/* chan_timer	*/
+	REG_FIELD_ID(0x42, 0, 6, 4, 1),		/* itarget	*/
+	REG_FIELD(0x46, 7, 7),			/* module_en	*/
+	REG_FIELD(0x49, 0, 3),			/* iresolution	*/
+	REG_FIELD_ID(0x4a, 0, 6, 4, 1),		/* chan_strobe	*/
+	REG_FIELD(0x4e, 0, 3),			/* chan_en	*/
+};
+
+struct qcom_flash_data {
+	struct v4l2_flash	**v4l2_flash;
+	struct regmap_field     *r_fields[REG_MAX_COUNT];
+	struct mutex		lock;
+	enum hw_type		hw_type;
+	u8			leds_count;
+	u8			max_channels;
+	u8			chan_en_bits;
+};
+
+struct qcom_flash_led {
+	struct qcom_flash_data		*flash_data;
+	struct led_classdev_flash	flash;
+	u32				max_flash_current_ma;
+	u32				max_torch_current_ma;
+	u32				max_timeout_ms;
+	u32				flash_current_ma;
+	u32				flash_timeout_ms;
+	u8				*chan_id;
+	u8				chan_count;
+	bool				enabled;
+};
+
+static int set_flash_module_en(struct qcom_flash_led *led, bool en)
+{
+	struct qcom_flash_data *flash_data = led->flash_data;
+	u8 led_mask = 0, enable;
+	int i, rc;
+
+	for (i = 0; i < led->chan_count; i++)
+		led_mask |= BIT(led->chan_id[i]);
+
+	mutex_lock(&flash_data->lock);
+	if (en)
+		flash_data->chan_en_bits |= led_mask;
+	else
+		flash_data->chan_en_bits &= ~led_mask;
+
+	enable = !!flash_data->chan_en_bits;
+	rc = regmap_field_write(flash_data->r_fields[REG_MODULE_EN], enable);
+	if (rc)
+		dev_err(led->flash.led_cdev.dev, "write module_en failed, rc=%d\n", rc);
+	mutex_unlock(&flash_data->lock);
+
+	return rc;
+}
+
+static int set_flash_current(struct qcom_flash_led *led, u32 current_ma, enum led_mode mode)
+{
+	struct qcom_flash_data *flash_data = led->flash_data;
+	u32 itarg_ua, ires_ua;
+	u8 shift, ires_mask = 0, ires_val = 0, chan_id;
+	int i, rc;
+
+	/*
+	 * Split the current across the channels and set the
+	 * IRESOLUTION and ITARGET registers accordingly.
+	 */
+	itarg_ua = (current_ma * UA_PER_MA) / led->chan_count + 1;
+	ires_ua = (mode == FLASH_MODE) ? FLASH_IRES_UA : TORCH_IRES_UA;
+
+	for (i = 0; i < led->chan_count; i++) {
+		u8 itarget = 0;
+
+		if (itarg_ua > ires_ua)
+			itarget = itarg_ua / ires_ua - 1;
+
+		chan_id = led->chan_id[i];
+
+		rc = regmap_fields_write(flash_data->r_fields[REG_ITARGET], chan_id, itarget);
+		if (rc)
+			return rc;
+
+		if (flash_data->hw_type == QCOM_MVFLASH_3CH) {
+			shift = chan_id * 2;
+			ires_mask |= FLASH_IRES_MASK_3CH << shift;
+			ires_val |= ((mode == FLASH_MODE) ?
+				(FLASH_IRES_12P5MA_VAL << shift) :
+				(FLASH_IRES_5MA_VAL_3CH << shift));
+		} else if (flash_data->hw_type == QCOM_MVFLASH_4CH) {
+			shift = chan_id;
+			ires_mask |= FLASH_IRES_MASK_4CH << shift;
+			ires_val |= ((mode == FLASH_MODE) ?
+				(FLASH_IRES_12P5MA_VAL << shift) :
+				(FLASH_IRES_5MA_VAL_4CH << shift));
+		} else {
+			dev_err(led->flash.led_cdev.dev,
+					"HW type %d is not supported\n", flash_data->hw_type);
+			return -EOPNOTSUPP;
+		}
+	}
+
+	return regmap_field_update_bits(flash_data->r_fields[REG_IRESOLUTION], ires_mask, ires_val);
+}
+
+static int set_flash_timeout(struct qcom_flash_led *led, u32 timeout_ms)
+{
+	struct qcom_flash_data *flash_data = led->flash_data;
+	u8 timer, chan_id;
+	int rc, i;
+
+	/* set SAFETY_TIMER for all the channels connected to the same LED */
+	timeout_ms = min_t(u32, timeout_ms, led->max_timeout_ms);
+
+	for (i = 0; i < led->chan_count; i++) {
+		chan_id = led->chan_id[i];
+
+		timer = timeout_ms / FLASH_TIMER_STEP_MS;
+		timer = clamp_t(u8, timer, 0, FLASH_TIMER_VAL_MASK);
+
+		if (timeout_ms)
+			timer |= FLASH_TIMER_EN_BIT;
+
+		rc = regmap_fields_write(flash_data->r_fields[REG_CHAN_TIMER], chan_id, timer);
+		if (rc)
+			return rc;
+	}
+
+	return 0;
+}
+
+static int set_flash_strobe(struct qcom_flash_led *led, enum led_strobe strobe, bool state)
+{
+	struct qcom_flash_data *flash_data = led->flash_data;
+	u8 strobe_sel, chan_en, chan_id, chan_mask = 0;
+	int rc, i;
+
+	/* Set SW strobe config for all channels connected to the LED */
+	for (i = 0; i < led->chan_count; i++) {
+		chan_id = led->chan_id[i];
+
+		if (strobe == SW_STROBE)
+			strobe_sel = FIELD_PREP(FLASH_STROBE_HW_SW_SEL_BIT, SW_STROBE_VAL);
+		else
+			strobe_sel = FIELD_PREP(FLASH_STROBE_HW_SW_SEL_BIT, HW_STROBE_VAL);
+
+		strobe_sel |=
+			FIELD_PREP(FLASH_HW_STROBE_TRIGGER_SEL_BIT, STROBE_LEVEL_TRIGGER_VAL) |
+			FIELD_PREP(FLASH_STROBE_POLARITY_BIT, STROBE_ACTIVE_HIGH_VAL);
+
+		rc = regmap_fields_write(
+				flash_data->r_fields[REG_CHAN_STROBE], chan_id, strobe_sel);
+		if (rc)
+			return rc;
+
+		chan_mask |= BIT(chan_id);
+	}
+
+	/* Enable/disable flash channels */
+	chan_en = state ? chan_mask : 0;
+	rc = regmap_field_update_bits(flash_data->r_fields[REG_CHAN_EN], chan_mask, chan_en);
+	if (rc)
+		return rc;
+
+	led->enabled = state;
+	return 0;
+}
+
+static inline struct qcom_flash_led *flcdev_to_qcom_fled(struct led_classdev_flash *flcdev)
+{
+	return container_of(flcdev, struct qcom_flash_led, flash);
+}
+
+static int qcom_flash_brightness_set(struct led_classdev_flash *fled_cdev, u32 brightness)
+{
+	struct qcom_flash_led *led = flcdev_to_qcom_fled(fled_cdev);
+
+	led->flash_current_ma = min_t(u32, led->max_flash_current_ma, brightness / UA_PER_MA);
+	return 0;
+}
+
+static int qcom_flash_timeout_set(struct led_classdev_flash *fled_cdev, u32 timeout)
+{
+	struct qcom_flash_led *led = flcdev_to_qcom_fled(fled_cdev);
+
+	led->flash_timeout_ms = timeout / USEC_PER_MSEC;
+	return 0;
+}
+
+static int qcom_flash_strobe_set(struct led_classdev_flash *fled_cdev, bool state)
+{
+	struct qcom_flash_led *led = flcdev_to_qcom_fled(fled_cdev);
+	int rc;
+
+	rc = set_flash_current(led, led->flash_current_ma, FLASH_MODE);
+	if (rc)
+		return rc;
+
+	rc = set_flash_timeout(led, led->flash_timeout_ms);
+	if (rc)
+		return rc;
+
+	rc = set_flash_module_en(led, state);
+	if (rc)
+		return rc;
+
+	return set_flash_strobe(led, SW_STROBE, state);
+}
+
+static int qcom_flash_strobe_get(struct led_classdev_flash *fled_cdev, bool *state)
+{
+	struct qcom_flash_led *led = flcdev_to_qcom_fled(fled_cdev);
+
+	*state = led->enabled;
+	return 0;
+}
+
+static int qcom_flash_fault_get(struct led_classdev_flash *fled_cdev, u32 *fault)
+{
+	struct qcom_flash_led *led = flcdev_to_qcom_fled(fled_cdev);
+	struct qcom_flash_data *flash_data = led->flash_data;
+	u8 shift, chan_id, chan_mask = 0;
+	u8 ot_mask = 0, oc_mask = 0, uv_mask = 0;
+	u32 val, fault_sts = 0;
+	int i, rc;
+
+	rc = regmap_field_read(flash_data->r_fields[REG_STATUS1], &val);
+	if (rc)
+		return rc;
+
+	for (i = 0; i < led->chan_count; i++) {
+		chan_id = led->chan_id[i];
+		shift = chan_id * 2;
+
+		if (val & BIT(shift))
+			fault_sts |= LED_FAULT_SHORT_CIRCUIT;
+
+		chan_mask |= BIT(chan_id);
+	}
+
+	rc = regmap_field_read(flash_data->r_fields[REG_STATUS2], &val);
+	if (rc)
+		return rc;
+
+	if (flash_data->hw_type == QCOM_MVFLASH_3CH) {
+		ot_mask = FLASH_STS_3CH_OTST1 |
+			  FLASH_STS_3CH_OTST2 |
+			  FLASH_STS_3CH_OTST3 |
+			  FLASH_STS_3CH_BOB_THM_OVERLOAD;
+		oc_mask = FLASH_STS_3CH_BOB_ILIM_S1 |
+			  FLASH_STS_3CH_BOB_ILIM_S2 |
+			  FLASH_STS_3CH_BCL_IBAT;
+		uv_mask = FLASH_STS_3CH_VPH_DROOP;
+	} else if (flash_data->hw_type == QCOM_MVFLASH_4CH) {
+		ot_mask = FLASH_STS_4CH_OTST2 |
+			  FLASH_STS_4CH_OTST1 |
+			  FLASH_STS_4CHG_BOB_THM_OVERLOAD;
+		oc_mask = FLASH_STS_4CH_BCL_IBAT |
+			  FLASH_STS_4CH_BOB_ILIM_S1 |
+			  FLASH_STS_4CH_BOB_ILIM_S2;
+		uv_mask = FLASH_STS_4CH_VPH_LOW;
+	}
+
+	if (val & ot_mask)
+		fault_sts |= LED_FAULT_OVER_TEMPERATURE;
+
+	if (val & oc_mask)
+		fault_sts |= LED_FAULT_OVER_CURRENT;
+
+	if (val & uv_mask)
+		fault_sts |= LED_FAULT_INPUT_VOLTAGE;
+
+	rc = regmap_field_read(flash_data->r_fields[REG_STATUS3], &val);
+	if (rc)
+		return rc;
+
+	if (flash_data->hw_type == QCOM_MVFLASH_3CH) {
+		if (val & chan_mask)
+			fault_sts |= LED_FAULT_TIMEOUT;
+	} else if (flash_data->hw_type == QCOM_MVFLASH_4CH) {
+		for (i = 0; i < led->chan_count; i++) {
+			chan_id = led->chan_id[i];
+			shift = chan_id * 2;
+
+			if (val & BIT(shift))
+				fault_sts |= LED_FAULT_TIMEOUT;
+		}
+	}
+
+	*fault = fault_sts;
+	return 0;
+}
+
+static int qcom_flash_led_brightness_set(struct led_classdev *led_cdev,
+					enum led_brightness brightness)
+{
+	struct led_classdev_flash *fled_cdev = lcdev_to_flcdev(led_cdev);
+	struct qcom_flash_led *led = flcdev_to_qcom_fled(fled_cdev);
+	u32 current_ma = brightness * led->max_torch_current_ma / LED_FULL;
+	bool enable = !!brightness;
+	int rc;
+
+	rc = set_flash_current(led, current_ma, TORCH_MODE);
+	if (rc)
+		return rc;
+
+	/* Disable flash timeout for torch LED */
+	rc = set_flash_timeout(led, 0);
+	if (rc)
+		return rc;
+
+	rc = set_flash_module_en(led, enable);
+	if (rc)
+		return rc;
+
+	return set_flash_strobe(led, SW_STROBE, enable);
+}
+
+static const struct led_flash_ops qcom_flash_ops = {
+	.flash_brightness_set = qcom_flash_brightness_set,
+	.strobe_set = qcom_flash_strobe_set,
+	.strobe_get = qcom_flash_strobe_get,
+	.timeout_set = qcom_flash_timeout_set,
+	.fault_get = qcom_flash_fault_get,
+};
+
+#if IS_ENABLED(CONFIG_V4L2_FLASH_LED_CLASS)
+static int qcom_flash_external_strobe_set(struct v4l2_flash *v4l2_flash, bool enable)
+{
+	struct led_classdev_flash *fled_cdev = v4l2_flash->fled_cdev;
+	struct qcom_flash_led *led = flcdev_to_qcom_fled(fled_cdev);
+	int rc;
+
+	rc = set_flash_module_en(led, enable);
+	if (rc)
+		return rc;
+
+	if (enable)
+		return set_flash_strobe(led, HW_STROBE, true);
+	else
+		return set_flash_strobe(led, SW_STROBE, false);
+}
+
+static enum led_brightness
+qcom_flash_intensity_to_led_brightness(struct v4l2_flash *v4l2_flash, s32 intensity)
+{
+	struct led_classdev_flash *fled_cdev = v4l2_flash->fled_cdev;
+	struct qcom_flash_led *led = flcdev_to_qcom_fled(fled_cdev);
+	u32 current_ma = intensity / UA_PER_MA;
+
+	current_ma = min_t(u32, current_ma, led->max_torch_current_ma);
+	if (!current_ma)
+		return LED_OFF;
+
+	return (current_ma * LED_FULL) / led->max_torch_current_ma;
+}
+
+static s32 qcom_flash_brightness_to_led_intensity(struct v4l2_flash *v4l2_flash,
+					enum led_brightness brightness)
+{
+	struct led_classdev_flash *fled_cdev = v4l2_flash->fled_cdev;
+	struct qcom_flash_led *led = flcdev_to_qcom_fled(fled_cdev);
+
+	return (brightness * led->max_torch_current_ma * UA_PER_MA) / LED_FULL;
+}
+
+static const struct v4l2_flash_ops qcom_v4l2_flash_ops = {
+	.external_strobe_set = qcom_flash_external_strobe_set,
+	.intensity_to_led_brightness = qcom_flash_intensity_to_led_brightness,
+	.led_brightness_to_intensity = qcom_flash_brightness_to_led_intensity,
+};
+
+static int
+qcom_flash_v4l2_init(struct device *dev, struct qcom_flash_led *led, struct fwnode_handle *fwnode)
+{
+	struct qcom_flash_data *flash_data = led->flash_data;
+	struct v4l2_flash_config v4l2_cfg = { 0 };
+	struct led_flash_setting *intensity = &v4l2_cfg.intensity;
+
+	if (!(led->flash.led_cdev.flags & LED_DEV_CAP_FLASH))
+		return 0;
+
+	intensity->min = intensity->step = TORCH_IRES_UA * led->chan_count;
+	intensity->max = led->max_torch_current_ma * UA_PER_MA;
+	intensity->val = min_t(u32, intensity->max, TORCH_CURRENT_DEFAULT_UA);
+
+	strscpy(v4l2_cfg.dev_name, led->flash.led_cdev.dev->kobj.name,
+					sizeof(v4l2_cfg.dev_name));
+
+	v4l2_cfg.has_external_strobe = true;
+	v4l2_cfg.flash_faults = LED_FAULT_INPUT_VOLTAGE |
+				LED_FAULT_OVER_CURRENT |
+				LED_FAULT_SHORT_CIRCUIT |
+				LED_FAULT_OVER_TEMPERATURE |
+				LED_FAULT_TIMEOUT;
+
+	flash_data->v4l2_flash[flash_data->leds_count] =
+		v4l2_flash_init(dev, fwnode, &led->flash, &qcom_v4l2_flash_ops, &v4l2_cfg);
+	return PTR_ERR_OR_ZERO(flash_data->v4l2_flash);
+}
+# else
+static int
+qcom_flash_v4l2_init(struct device *dev, struct qcom_flash_led *led, struct fwnode_handle *fwnode)
+{
+	return 0;
+}
+#endif
+
+static int qcom_flash_register_led_device(struct device *dev,
+		struct fwnode_handle *node, struct qcom_flash_led *led)
+{
+	struct qcom_flash_data *flash_data = led->flash_data;
+	struct led_init_data init_data;
+	struct led_classdev_flash *flash = &led->flash;
+	struct led_flash_setting *brightness, *timeout;
+	u32 count, current_ua, timeout_us;
+	u32 channels[4];
+	int i, rc;
+
+	count = fwnode_property_count_u32(node, "led-sources");
+	if (count <= 0) {
+		dev_err(dev, "No led-sources specified\n");
+		return -ENODEV;
+	}
+
+	if (count > flash_data->max_channels) {
+		dev_err(dev, "led-sources count %u exceeds maximum channel count %u\n",
+				count, flash_data->max_channels);
+		return -EINVAL;
+	}
+
+	rc = fwnode_property_read_u32_array(node, "led-sources", channels, count);
+	if (rc < 0) {
+		dev_err(dev, "Failed to read led-sources property, rc=%d\n", rc);
+		return rc;
+	}
+
+	led->chan_count = count;
+	led->chan_id = devm_kcalloc(dev, count, sizeof(u8), GFP_KERNEL);
+	if (!led->chan_id)
+		return -ENOMEM;
+
+	for (i = 0; i < count; i++) {
+		if ((channels[i] == 0) || (channels[i] > flash_data->max_channels)) {
+			dev_err(dev, "led-source out of HW support range [1-%u]\n",
+					flash_data->max_channels);
+			return -EINVAL;
+		}
+
+		/* Make chan_id indexing from 0 */
+		led->chan_id[i] = channels[i] - 1;
+	}
+
+	rc = fwnode_property_read_u32(node, "led-max-microamp", &current_ua);
+	if (rc < 0) {
+		dev_err(dev, "Failed to read led-max-microamp property, rc=%d\n", rc);
+		return rc;
+	}
+
+	if (current_ua == 0) {
+		dev_err(dev, "led-max-microamp shouldn't be 0\n");
+		return -EINVAL;
+	}
+
+	current_ua = min_t(u32, current_ua, TORCH_CURRENT_MAX_UA * led->chan_count);
+	led->max_torch_current_ma = current_ua / UA_PER_MA;
+
+	if (fwnode_property_present(node, "flash-max-microamp")) {
+		flash->led_cdev.flags |= LED_DEV_CAP_FLASH;
+
+		rc = fwnode_property_read_u32(node, "flash-max-microamp", &current_ua);
+		if (rc < 0) {
+			dev_err(dev, "Failed to read flash-max-microamp property, rc=%d\n",
+					rc);
+			return rc;
+		}
+
+		current_ua = min_t(u32, current_ua, FLASH_CURRENT_MAX_UA * led->chan_count);
+		current_ua = min_t(u32, current_ua, FLASH_TOTAL_CURRENT_MAX_UA);
+
+		/* Initialize flash class LED device brightness settings */
+		brightness = &flash->brightness;
+		brightness->min = brightness->step = FLASH_IRES_UA * led->chan_count;
+		brightness->max = current_ua;
+		brightness->val = min_t(u32, current_ua, FLASH_CURRENT_DEFAULT_UA);
+
+		led->max_flash_current_ma = current_ua / UA_PER_MA;
+		led->flash_current_ma = brightness->val / UA_PER_MA;
+
+		rc = fwnode_property_read_u32(node, "flash-max-timeout-us", &timeout_us);
+		if (rc < 0) {
+			dev_err(dev, "Failed to read flash-max-timeout-us property, rc=%d\n",
+					rc);
+			return rc;
+		}
+
+		timeout_us = min_t(u32, timeout_us, FLASH_TIMEOUT_MAX_US);
+
+		/* Initialize flash class LED device timeout settings */
+		timeout = &flash->timeout;
+		timeout->min = timeout->step = FLASH_TIMEOUT_STEP_US;
+		timeout->val = timeout->max = timeout_us;
+
+		led->max_timeout_ms = led->flash_timeout_ms = timeout_us / USEC_PER_MSEC;
+
+		flash->ops = &qcom_flash_ops;
+	}
+
+	flash->led_cdev.brightness_set_blocking = qcom_flash_led_brightness_set;
+
+	init_data.fwnode = node;
+	init_data.devicename = NULL;
+	init_data.default_label = NULL;
+	init_data.devname_mandatory = false;
+
+	rc = devm_led_classdev_flash_register_ext(dev, flash, &init_data);
+	if (rc < 0) {
+		dev_err(dev, "Register flash LED classdev failed, rc=%d\n", rc);
+		return rc;
+	}
+
+	return qcom_flash_v4l2_init(dev, led, node);
+}
+
+static int qcom_flash_led_probe(struct platform_device *pdev)
+{
+	struct qcom_flash_data *flash_data;
+	struct qcom_flash_led *led;
+	struct fwnode_handle *child;
+	struct device *dev = &pdev->dev;
+	struct regmap *regmap;
+	struct reg_field *regs;
+	int count, i, rc;
+	u32 val, reg_base;
+
+	flash_data = devm_kzalloc(dev, sizeof(*flash_data), GFP_KERNEL);
+	if (!flash_data)
+		return -ENOMEM;
+
+	regmap = dev_get_regmap(dev->parent, NULL);
+	if (!regmap) {
+		dev_err(dev, "Failed to get parent regmap\n");
+		return -EINVAL;
+	}
+
+	rc = fwnode_property_read_u32(dev->fwnode, "reg", &reg_base);
+	if (rc < 0) {
+		dev_err(dev, "Failed to get register base address, rc=%d\n", rc);
+		return rc;
+	}
+
+	rc = regmap_read(regmap, reg_base + FLASH_TYPE_REG, &val);
+	if (rc < 0) {
+		dev_err(dev, "Read flash LED module type failed, rc=%d\n", rc);
+		return rc;
+	}
+
+	if (val != FLASH_TYPE_VAL) {
+		dev_err(dev, "type %#x is not a flash LED module\n", val);
+		return -ENODEV;
+	}
+
+	rc = regmap_read(regmap, reg_base + FLASH_SUBTYPE_REG, &val);
+	if (rc < 0) {
+		dev_err(dev, "Read flash LED module subtype failed, rc=%d\n", rc);
+		return rc;
+	}
+
+	if (val == FLASH_SUBTYPE_3CH_VAL) {
+		flash_data->hw_type = QCOM_MVFLASH_3CH;
+		flash_data->max_channels = 3;
+		regs = mvflash_3ch_regs;
+	} else if (val == FLASH_SUBTYPE_4CH_VAL) {
+		flash_data->hw_type = QCOM_MVFLASH_4CH;
+		flash_data->max_channels = 4;
+		regs = mvflash_4ch_regs;
+	} else {
+		dev_err(dev, "flash LED subtype %#x is not yet supported\n", val);
+		return -ENODEV;
+	}
+
+	for (i = 0; i < REG_MAX_COUNT; i++)
+		regs[i].reg += reg_base;
+
+	rc = devm_regmap_field_bulk_alloc(dev, regmap, flash_data->r_fields, regs, REG_MAX_COUNT);
+	if (rc < 0) {
+		dev_err(dev, "Failed to allocate regmap field, rc=%d\n", rc);
+		return rc;
+	}
+
+	platform_set_drvdata(pdev, flash_data);
+	mutex_init(&flash_data->lock);
+
+	count = device_get_child_node_count(dev);
+	if (count == 0 || count > flash_data->max_channels) {
+		dev_err(dev, "No child or child count exceeds %d\n", flash_data->max_channels);
+		return -EINVAL;
+	}
+
+	flash_data->v4l2_flash = devm_kcalloc(dev, count,
+			sizeof(*flash_data->v4l2_flash), GFP_KERNEL);
+	if (!flash_data->v4l2_flash)
+		return -ENOMEM;
+
+	device_for_each_child_node(dev, child) {
+		led = devm_kzalloc(dev, sizeof(*led), GFP_KERNEL);
+		if (!led) {
+			rc = -ENOMEM;
+			goto release;
+		}
+
+		led->flash_data = flash_data;
+		rc = qcom_flash_register_led_device(dev, child, led);
+		if (rc < 0)
+			goto release;
+
+		flash_data->leds_count++;
+	}
+
+	return 0;
+
+release:
+	while (flash_data->v4l2_flash[flash_data->leds_count] && flash_data->leds_count)
+		v4l2_flash_release(flash_data->v4l2_flash[flash_data->leds_count--]);
+	return rc;
+}
+
+static int qcom_flash_led_remove(struct platform_device *pdev)
+{
+	struct qcom_flash_data *flash_data = platform_get_drvdata(pdev);
+
+	while (flash_data->v4l2_flash[flash_data->leds_count] && flash_data->leds_count)
+		v4l2_flash_release(flash_data->v4l2_flash[flash_data->leds_count--]);
+
+	mutex_destroy(&flash_data->lock);
+	return 0;
+}
+
+static const struct of_device_id qcom_flash_led_match_table[] = {
+	{ .compatible = "qcom,spmi-flash-led" },
+	{ }
+};
+
+MODULE_DEVICE_TABLE(of, qcom_flash_led_match_table);
+static struct platform_driver qcom_flash_led_driver = {
+	.driver = {
+		.name = "leds-qcom-flash",
+		.of_match_table = qcom_flash_led_match_table,
+	},
+	.probe = qcom_flash_led_probe,
+	.remove = qcom_flash_led_remove,
+};
+
+module_platform_driver(qcom_flash_led_driver);
+
+MODULE_DESCRIPTION("QCOM Flash LED driver");
+MODULE_LICENSE("GPL");

drivers/leds/leds-bd2606mvv.c

···
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (C) 2023 Andreas Kemnade
+ *
+ * Datasheet:
+ * https://fscdn.rohm.com/en/products/databook/datasheet/ic/power/led_driver/bd2606mvv_1-e.pdf
+ *
+ * If LED brightness cannot be controlled independently due to shared
+ * brightness registers, max_brightness is set to 1 and only on/off
+ * is possible for the affected LED pair.
+ */
+
+#include <linux/i2c.h>
+#include <linux/leds.h>
+#include <linux/module.h>
+#include <linux/mod_devicetable.h>
+#include <linux/property.h>
+#include <linux/regmap.h>
+#include <linux/slab.h>
+
+#define BD2606_MAX_LEDS 6
+#define BD2606_MAX_BRIGHTNESS 63
+#define BD2606_REG_PWRCNT 3
+#define ldev_to_led(c)	container_of(c, struct bd2606mvv_led, ldev)
+
+struct bd2606mvv_led {
+	unsigned int led_no;
+	struct led_classdev ldev;
+	struct bd2606mvv_priv *priv;
+};
+
+struct bd2606mvv_priv {
+	struct bd2606mvv_led leds[BD2606_MAX_LEDS];
+	struct regmap *regmap;
+};
+
+static int
+bd2606mvv_brightness_set(struct led_classdev *led_cdev,
+		      enum led_brightness brightness)
+{
+	struct bd2606mvv_led *led = ldev_to_led(led_cdev);
+	struct bd2606mvv_priv *priv = led->priv;
+	int err;
+
+	if (brightness == 0)
+		return regmap_update_bits(priv->regmap,
+					  BD2606_REG_PWRCNT,
+					  1 << led->led_no,
+					  0);
+
+	/* shared brightness register */
+	err = regmap_write(priv->regmap, led->led_no / 2,
+			   led_cdev->max_brightness == 1 ?
+			   BD2606_MAX_BRIGHTNESS : brightness);
+	if (err)
+		return err;
+
+	return regmap_update_bits(priv->regmap,
+				  BD2606_REG_PWRCNT,
+				  1 << led->led_no,
+				  1 << led->led_no);
+}
+
+static const struct regmap_config bd2606mvv_regmap = {
+	.reg_bits = 8,
+	.val_bits = 8,
+	.max_register = 0x3,
+};
+
+static int bd2606mvv_probe(struct i2c_client *client)
+{
+	struct fwnode_handle *np, *child;
+	struct device *dev = &client->dev;
+	struct bd2606mvv_priv *priv;
+	struct fwnode_handle *led_fwnodes[BD2606_MAX_LEDS] = { 0 };
+	int active_pairs[BD2606_MAX_LEDS / 2] = { 0 };
+	int err, reg;
+	int i;
+
+	np = dev_fwnode(dev);
+	if (!np)
+		return -ENODEV;
+
+	priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
+	if (!priv)
+		return -ENOMEM;
+
+	priv->regmap = devm_regmap_init_i2c(client, &bd2606mvv_regmap);
+	if (IS_ERR(priv->regmap)) {
+		err = PTR_ERR(priv->regmap);
+		dev_err(dev, "Failed to allocate register map: %d\n", err);
+		return err;
+	}
+
+	i2c_set_clientdata(client, priv);
+
+	fwnode_for_each_available_child_node(np, child) {
+		struct bd2606mvv_led *led;
+
+		err = fwnode_property_read_u32(child, "reg", &reg);
+		if (err) {
+			fwnode_handle_put(child);
+			return err;
+		}
+		if (reg < 0 || reg >= BD2606_MAX_LEDS || led_fwnodes[reg]) {
+			fwnode_handle_put(child);
+			return -EINVAL;
+		}
+		led = &priv->leds[reg];
+		led_fwnodes[reg] = child;
+		active_pairs[reg / 2]++;
+		led->priv = priv;
+		led->led_no = reg;
+		led->ldev.brightness_set_blocking = bd2606mvv_brightness_set;
+		led->ldev.max_brightness = BD2606_MAX_BRIGHTNESS;
+	}
+
+	for (i = 0; i < BD2606_MAX_LEDS; i++) {
+		struct led_init_data init_data = {};
+
+		if (!led_fwnodes[i])
+			continue;
+
+		init_data.fwnode = led_fwnodes[i];
+		/* Check whether brightness can be independently adjusted. */
+		if (active_pairs[i / 2] == 2)
+			priv->leds[i].ldev.max_brightness = 1;
+
+		err = devm_led_classdev_register_ext(dev,
+						     &priv->leds[i].ldev,
+						     &init_data);
+		if (err < 0) {
+			fwnode_handle_put(child);
+			return dev_err_probe(dev, err,
+					     "couldn't register LED %s\n",
+					     priv->leds[i].ldev.name);
+		}
+	}
+	return 0;
+}
+
+static const struct of_device_id __maybe_unused of_bd2606mvv_leds_match[] = {
+	{ .compatible = "rohm,bd2606mvv", },
+	{},
+};
+MODULE_DEVICE_TABLE(of, of_bd2606mvv_leds_match);
+
+static struct i2c_driver bd2606mvv_driver = {
+	.driver   = {
+		.name    = "leds-bd2606mvv",
+		.of_match_table = of_match_ptr(of_bd2606mvv_leds_match),
+	},
+	.probe_new = bd2606mvv_probe,
+};
+
+module_i2c_driver(bd2606mvv_driver);
+
+MODULE_AUTHOR("Andreas Kemnade <[e-mail]>");
+MODULE_DESCRIPTION("BD2606 LED driver");
+MODULE_LICENSE("GPL");

drivers/leds/leds-lp8860.c

···
 #include <linux/module.h>
 #include <linux/mutex.h>
 #include <linux/of.h>
-#include <linux/of_gpio.h>
 #include <linux/gpio/consumer.h>
 #include <linux/slab.h>
 
···
 		}
 	}
 
-	if (led->enable_gpio)
-		gpiod_direction_output(led->enable_gpio, 1);
+	gpiod_direction_output(led->enable_gpio, 1);
 
 	ret = lp8860_fault_check(led);
 	if (ret)
···
 
 out:
 	if (ret)
-		if (led->enable_gpio)
-			gpiod_direction_output(led->enable_gpio, 0);
+		gpiod_direction_output(led->enable_gpio, 0);
 
 	if (led->regulator) {
 		ret = regulator_disable(led->regulator);
···
 	struct lp8860_led *led = i2c_get_clientdata(client);
 	int ret;
 
-	if (led->enable_gpio)
-		gpiod_direction_output(led->enable_gpio, 0);
+	gpiod_direction_output(led->enable_gpio, 0);
 
 	if (led->regulator) {
 		ret = regulator_disable(led->regulator);

drivers/leds/leds-tca6507.c

···
 		if (fwnode_property_read_string(child, "label", &led.name))
 			led.name = fwnode_get_name(child);
 
-		fwnode_property_read_string(child, "linux,default-trigger",
-					    &led.default_trigger);
+		if (fwnode_property_read_string(child, "linux,default-trigger",
+						&led.default_trigger))
+			led.default_trigger = NULL;
 
 		led.flags = 0;
 		if (fwnode_device_is_compatible(child, "gpio"))

drivers/leds/leds-tlc591xx.c

···
 	.max_register = 0x1e,
 };
 
-static const struct of_device_id of_tlc591xx_leds_match[] = {
+static const struct of_device_id of_tlc591xx_leds_match[] __maybe_unused = {
 	{ .compatible = "ti,tlc59116",
 	  .data = &tlc59116 },
 	{ .compatible = "ti,tlc59108",

drivers/leds/rgb/Kconfig

···
 
 	  If compiled as a module, the module will be named leds-qcom-lpg.
 
+config LEDS_MT6370_RGB
+	tristate "LED Support for MediaTek MT6370 PMIC"
+	depends on MFD_MT6370
+	select LINEAR_RANGES
+	help
+	  Say Y here to enable support for MT6370_RGB LED device.
+	  In MT6370, there are four channel current-sink LED drivers that
+	  support hardware pattern for constant current, PWM, and breath mode.
+	  Isink4 channel can also be used as a CHG_VIN power good indicator.
+
+	  This driver can also be built as a module. If so, the module
+	  will be called "leds-mt6370-rgb".
+
 endif # LEDS_CLASS_MULTICOLOR

drivers/leds/rgb/Makefile

···
 
 obj-$(CONFIG_LEDS_PWM_MULTICOLOR)	+= leds-pwm-multicolor.o
 obj-$(CONFIG_LEDS_QCOM_LPG)		+= leds-qcom-lpg.o
+obj-$(CONFIG_LEDS_MT6370_RGB)		+= leds-mt6370-rgb.o

drivers/leds/rgb/leds-mt6370-rgb.c

···
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (C) 2023 Richtek Technology Corp.
+ *
+ * Authors:
+ *   ChiYuan Huang <[e-mail]>
+ *   Alice Chen <[e-mail]>
+ */
+
+#include <linux/bitfield.h>
+#include <linux/bitops.h>
+#include <linux/kernel.h>
+#include <linux/leds.h>
+#include <linux/led-class-multicolor.h>
+#include <linux/linear_range.h>
+#include <linux/mod_devicetable.h>
+#include <linux/module.h>
+#include <linux/mutex.h>
+#include <linux/platform_device.h>
+#include <linux/property.h>
+#include <linux/regmap.h>
+#include <linux/util_macros.h>
+
+#include <asm/unaligned.h>
+
+enum {
+	MT6370_LED_ISNK1 = 0,
+	MT6370_LED_ISNK2,
+	MT6370_LED_ISNK3,
+	MT6370_LED_ISNK4,
+	MT6370_MAX_LEDS
+};
+
+enum mt6370_led_mode {
+	MT6370_LED_PWM_MODE = 0,
+	MT6370_LED_BREATH_MODE,
+	MT6370_LED_REG_MODE,
+	MT6370_LED_MAX_MODE
+};
+
+enum mt6370_led_field {
+	F_RGB_EN = 0,
+	F_CHGIND_EN,
+	F_LED1_CURR,
+	F_LED2_CURR,
+	F_LED3_CURR,
+	F_LED4_CURR,
+	F_LED1_MODE,
+	F_LED2_MODE,
+	F_LED3_MODE,
+	F_LED4_MODE,
+	F_LED1_DUTY,
+	F_LED2_DUTY,
+	F_LED3_DUTY,
+	F_LED4_DUTY,
+	F_LED1_FREQ,
+	F_LED2_FREQ,
+	F_LED3_FREQ,
+	F_LED4_FREQ,
+	F_MAX_FIELDS
+};
+
+enum mt6370_led_ranges {
+	R_LED123_CURR = 0,
+	R_LED4_CURR,
+	R_LED_TRFON,
+	R_LED_TOFF,
+	R_MAX_RANGES
+};
+
+enum mt6370_pattern {
+	P_LED_TR1 = 0,
+	P_LED_TR2,
+	P_LED_TF1,
+	P_LED_TF2,
+	P_LED_TON,
+	P_LED_TOFF,
+	P_MAX_PATTERNS
+};
+
+#define MT6370_REG_DEV_INFO			0x100
+#define MT6370_REG_RGB1_DIM			0x182
+#define MT6370_REG_RGB2_DIM			0x183
+#define MT6370_REG_RGB3_DIM			0x184
+#define MT6370_REG_RGB_EN			0x185
+#define MT6370_REG_RGB1_ISNK			0x186
+#define MT6370_REG_RGB2_ISNK			0x187
+#define MT6370_REG_RGB3_ISNK			0x188
+#define MT6370_REG_RGB1_TR			0x189
+#define MT6370_REG_RGB_CHRIND_DIM		0x192
+#define MT6370_REG_RGB_CHRIND_CTRL		0x193
+#define MT6370_REG_RGB_CHRIND_TR		0x194
+
+#define MT6372_REG_RGB_EN			0x182
+#define MT6372_REG_RGB1_ISNK			0x183
+#define MT6372_REG_RGB2_ISNK			0x184
+#define MT6372_REG_RGB3_ISNK			0x185
+#define MT6372_REG_RGB4_ISNK			0x186
+#define MT6372_REG_RGB1_DIM			0x187
+#define MT6372_REG_RGB2_DIM			0x188
+#define MT6372_REG_RGB3_DIM			0x189
+#define MT6372_REG_RGB4_DIM			0x18A
+#define MT6372_REG_RGB12_FREQ			0x18B
+#define MT6372_REG_RGB34_FREQ			0x18C
+#define MT6372_REG_RGB1_TR			0x18D
+
+#define MT6370_VENDOR_ID_MASK			GENMASK(7, 4)
+#define MT6372_VENDOR_ID			0x9
+#define MT6372C_VENDOR_ID			0xb
+#define MT6370_CHEN_BIT(id)			BIT(MT6370_LED_ISNK4 - id)
+#define MT6370_VIRTUAL_MULTICOLOR		5
+#define MC_CHANNEL_NUM				3
+#define MT6370_PWM_DUTY				(BIT(5) - 1)
+#define MT6372_PWM_DUTY				(BIT(8) - 1)
+
+struct mt6370_led {
+	/*
+	 * If the color of the LED in DT is set to
+	 *   - 'LED_COLOR_ID_RGB'
+	 *   - 'LED_COLOR_ID_MULTI'
+	 * The member 'index' of this struct will be set to
+	 * 'MT6370_VIRTUAL_MULTICOLOR'.
+	 * If so, this LED will choose 'struct led_classdev_mc mc' to use.
+	 * Instead, if the member 'index' of this struct is set to
+	 * 'MT6370_LED_ISNK1' ~ 'MT6370_LED_ISNK4', then this LED will choose
+	 * 'struct led_classdev isink' to use.
+	 */
+	union {
+		struct led_classdev isink;
+		struct led_classdev_mc mc;
+	};
+	struct mt6370_priv *priv;
+	enum led_default_state default_state;
+	u32 index;
+};
+
+struct mt6370_pdata {
+	const unsigned int *tfreq;
+	unsigned int tfreq_len;
+	u16 reg_rgb1_tr;
+	s16 reg_rgb_chrind_tr;
+	u8 pwm_duty;
+};
+
+struct mt6370_priv {
+	/* Per LED access lock */
+	struct mutex lock;
+	struct regmap *regmap;
+	struct regmap_field *fields[F_MAX_FIELDS];
+	const struct reg_field *reg_fields;
+	const struct linear_range *ranges;
+	struct reg_cfg *reg_cfgs;
+	const struct mt6370_pdata *pdata;
+	unsigned int leds_count;
+	unsigned int leds_active;
+	struct mt6370_led leds[];
+};
+
+static const struct reg_field common_reg_fields[F_MAX_FIELDS] = {
+	[F_RGB_EN]	= REG_FIELD(MT6370_REG_RGB_EN, 4, 7),
+	[F_CHGIND_EN]	= REG_FIELD(MT6370_REG_RGB_CHRIND_DIM, 7, 7),
+	[F_LED1_CURR]	= REG_FIELD(MT6370_REG_RGB1_ISNK, 0, 2),
+	[F_LED2_CURR]	= REG_FIELD(MT6370_REG_RGB2_ISNK, 0, 2),
+	[F_LED3_CURR]	= REG_FIELD(MT6370_REG_RGB3_ISNK, 0, 2),
+	[F_LED4_CURR]	= REG_FIELD(MT6370_REG_RGB_CHRIND_CTRL, 0, 1),
+	[F_LED1_MODE]	= REG_FIELD(MT6370_REG_RGB1_DIM, 5, 6),
+	[F_LED2_MODE]	= REG_FIELD(MT6370_REG_RGB2_DIM, 5, 6),
+	[F_LED3_MODE]	= REG_FIELD(MT6370_REG_RGB3_DIM, 5, 6),
+	[F_LED4_MODE]	= REG_FIELD(MT6370_REG_RGB_CHRIND_DIM, 5, 6),
+	[F_LED1_DUTY]	= REG_FIELD(MT6370_REG_RGB1_DIM, 0, 4),
+	[F_LED2_DUTY]	= REG_FIELD(MT6370_REG_RGB2_DIM, 0, 4),
+	[F_LED3_DUTY]	= REG_FIELD(MT6370_REG_RGB3_DIM, 0, 4),
+	[F_LED4_DUTY]	= REG_FIELD(MT6370_REG_RGB_CHRIND_DIM, 0, 4),
+	[F_LED1_FREQ]	= REG_FIELD(MT6370_REG_RGB1_ISNK, 3, 5),
+	[F_LED2_FREQ]	= REG_FIELD(MT6370_REG_RGB2_ISNK, 3, 5),
+	[F_LED3_FREQ]	= REG_FIELD(MT6370_REG_RGB3_ISNK, 3, 5),
+	[F_LED4_FREQ]	= REG_FIELD(MT6370_REG_RGB_CHRIND_CTRL, 2, 4),
+};
+
+static const struct reg_field mt6372_reg_fields[F_MAX_FIELDS] = {
+	[F_RGB_EN]	= REG_FIELD(MT6372_REG_RGB_EN, 4, 7),
+	[F_CHGIND_EN]	= REG_FIELD(MT6372_REG_RGB_EN, 3, 3),
+	[F_LED1_CURR]	= REG_FIELD(MT6372_REG_RGB1_ISNK, 0, 3),
+	[F_LED2_CURR]	= REG_FIELD(MT6372_REG_RGB2_ISNK, 0, 3),
+	[F_LED3_CURR]	= REG_FIELD(MT6372_REG_RGB3_ISNK, 0, 3),
+	[F_LED4_CURR]	= REG_FIELD(MT6372_REG_RGB4_ISNK, 0, 3),
+	[F_LED1_MODE]	= REG_FIELD(MT6372_REG_RGB1_ISNK, 6, 7),
+	[F_LED2_MODE]	= REG_FIELD(MT6372_REG_RGB2_ISNK, 6, 7),
+	[F_LED3_MODE]	= REG_FIELD(MT6372_REG_RGB3_ISNK, 6, 7),
+	[F_LED4_MODE]	= REG_FIELD(MT6372_REG_RGB4_ISNK, 6, 7),
+	[F_LED1_DUTY]	= REG_FIELD(MT6372_REG_RGB1_DIM, 0, 7),
+	[F_LED2_DUTY]	= REG_FIELD(MT6372_REG_RGB2_DIM, 0, 7),
+	[F_LED3_DUTY]	= REG_FIELD(MT6372_REG_RGB3_DIM, 0, 7),
+	[F_LED4_DUTY]	= REG_FIELD(MT6372_REG_RGB4_DIM, 0, 7),
+	[F_LED1_FREQ]	= REG_FIELD(MT6372_REG_RGB12_FREQ, 5, 7),
+	[F_LED2_FREQ]	= REG_FIELD(MT6372_REG_RGB12_FREQ, 2, 4),
+	[F_LED3_FREQ]	= REG_FIELD(MT6372_REG_RGB34_FREQ, 5, 7),
+	[F_LED4_FREQ]	= REG_FIELD(MT6372_REG_RGB34_FREQ, 2, 4),
+};
+
+/* Current unit: microamp, time unit: millisecond */
+static const struct linear_range common_led_ranges[R_MAX_RANGES] = {
+	[R_LED123_CURR]	= { 4000, 1, 6, 4000 },
+	[R_LED4_CURR]	= { 2000, 1, 3, 2000 },
+	[R_LED_TRFON]	= { 125, 0, 15, 200 },
+	[R_LED_TOFF]	= { 250, 0, 15, 400 },
+};
+
+static const struct linear_range mt6372_led_ranges[R_MAX_RANGES] = {
+	[R_LED123_CURR]	= { 2000, 1, 14, 2000 },
+	[R_LED4_CURR]	= { 2000, 1, 14, 2000 },
+	[R_LED_TRFON]	= { 125, 0, 15, 250 },
+	[R_LED_TOFF]	= { 250, 0, 15, 500 },
+};
+
+static const unsigned int common_tfreqs[] = {
+	10000, 5000, 2000, 1000, 500, 200, 5, 1,
+};
+
+static const unsigned int mt6372_tfreqs[] = {
+	8000, 4000, 2000, 1000, 500, 250, 8, 4,
+};
+
+static const struct mt6370_pdata common_pdata = {
+	.tfreq = common_tfreqs,
+	.tfreq_len = ARRAY_SIZE(common_tfreqs),
+	.pwm_duty = MT6370_PWM_DUTY,
+	.reg_rgb1_tr = MT6370_REG_RGB1_TR,
+	.reg_rgb_chrind_tr = MT6370_REG_RGB_CHRIND_TR,
+};
+
+static const struct mt6370_pdata mt6372_pdata = {
+	.tfreq = mt6372_tfreqs,
+	.tfreq_len = ARRAY_SIZE(mt6372_tfreqs),
+	.pwm_duty = MT6372_PWM_DUTY,
+	.reg_rgb1_tr = MT6372_REG_RGB1_TR,
+	.reg_rgb_chrind_tr = -1,
+};
+
+static enum mt6370_led_field mt6370_get_led_current_field(unsigned int led_no)
+{
+	switch (led_no) {
+	case MT6370_LED_ISNK1:
+		return F_LED1_CURR;
+	case MT6370_LED_ISNK2:
+		return F_LED2_CURR;
+	case MT6370_LED_ISNK3:
+		return F_LED3_CURR;
+	default:
+		return F_LED4_CURR;
+	}
+}
+
+static int mt6370_set_led_brightness(struct mt6370_priv *priv, unsigned int led_no,
+				     unsigned int level)
+{
+	enum mt6370_led_field sel_field;
+
+	sel_field = mt6370_get_led_current_field(led_no);
+
+	return regmap_field_write(priv->fields[sel_field], level);
+}
+
+static int mt6370_get_led_brightness(struct mt6370_priv *priv, unsigned int led_no,
+				     unsigned int *level)
+{
+	enum mt6370_led_field sel_field;
+
+	sel_field = mt6370_get_led_current_field(led_no);
+
+	return regmap_field_read(priv->fields[sel_field], level);
+}
+
+static int mt6370_set_led_duty(struct mt6370_priv *priv, unsigned int led_no, unsigned int ton,
+			       unsigned int toff)
+{
+	const struct mt6370_pdata *pdata = priv->pdata;
+	enum mt6370_led_field sel_field;
+	unsigned int divisor, ratio;
+
+	divisor = pdata->pwm_duty;
+	ratio = ton * divisor / (ton + toff);
+
+	switch (led_no) {
+	case MT6370_LED_ISNK1:
+		sel_field = F_LED1_DUTY;
+		break;
+	case MT6370_LED_ISNK2:
+		sel_field = F_LED2_DUTY;
+		break;
+	case MT6370_LED_ISNK3:
+		sel_field = F_LED3_DUTY;
+		break;
+	default:
+		sel_field = F_LED4_DUTY;
+		break;
+	}
+
+	return regmap_field_write(priv->fields[sel_field], ratio);
+}
+
+static int mt6370_set_led_freq(struct mt6370_priv *priv, unsigned int led_no, unsigned int ton,
+			       unsigned int toff)
+{
+	const struct mt6370_pdata *pdata = priv->pdata;
+	enum mt6370_led_field sel_field;
+	unsigned int tfreq_len = pdata->tfreq_len;
+	unsigned int tsum, sel;
+
+	tsum = ton + toff;
+
+	if (tsum > pdata->tfreq[0] || tsum < pdata->tfreq[tfreq_len - 1])
+		return -EOPNOTSUPP;
+
+	sel = find_closest_descending(tsum, pdata->tfreq, tfreq_len);
+
+	switch (led_no) {
+	case MT6370_LED_ISNK1:
+		sel_field = F_LED1_FREQ;
+		break;
+	case MT6370_LED_ISNK2:
+		sel_field = F_LED2_FREQ;
+		break;
+	case MT6370_LED_ISNK3:
+		sel_field = F_LED3_FREQ;
+		break;
+	default:
+		sel_field = F_LED4_FREQ;
+		break;
+	}
+
+	return regmap_field_write(priv->fields[sel_field], sel);
+}
+
+static void mt6370_get_breath_reg_base(struct mt6370_priv *priv, unsigned int led_no,
+				       unsigned int *base)
+{
+	const struct mt6370_pdata *pdata = priv->pdata;
+
+	if (pdata->reg_rgb_chrind_tr < 0) {
+		*base = pdata->reg_rgb1_tr + led_no * 3;
+		return;
+	}
+
+	switch (led_no) {
+	case MT6370_LED_ISNK1:
+	case MT6370_LED_ISNK2:
+	case MT6370_LED_ISNK3:
+		*base = pdata->reg_rgb1_tr + led_no * 3;
+		break;
+	default:
+		*base = pdata->reg_rgb_chrind_tr;
+		break;
+	}
+}
+
+static int mt6370_gen_breath_pattern(struct mt6370_priv *priv, struct led_pattern *pattern, u32 len,
+				     u8 *pattern_val, u32 val_len)
+{
+	enum mt6370_led_ranges sel_range;
+	struct led_pattern *curr;
+	unsigned int sel;
+	u32 val = 0;
+	int i;
+
+	if (len < P_MAX_PATTERNS && val_len < P_MAX_PATTERNS / 2)
+		return -EINVAL;
+
+	/*
+	 * Pattern list
+	 * tr1:	 byte 0, b'[7:4]
+	 * tr2:	 byte 0, b'[3:0]
+	 * tf1:	 byte 1, b'[7:4]
+	 * tf2:	 byte 1, b'[3:0]
+	 * ton:	 byte 2, b'[7:4]
+	 * toff: byte 2, b'[3:0]
+	 */
+	for (i = 0; i < P_MAX_PATTERNS; i++) {
+		curr = pattern + i;
+
+		sel_range = i == P_LED_TOFF ? R_LED_TOFF : R_LED_TRFON;
+
+		linear_range_get_selector_within(priv->ranges + sel_range, curr->delta_t, &sel);
+
+		if (i % 2) {
+			val |= sel;
+		} else {
+			val <<= 8;
+			val |= sel << 4;
+		}
+	}
+
+	put_unaligned_be24(val, pattern_val);
+
+	return 0;
+}
+
+static int mt6370_set_led_mode(struct mt6370_priv *priv, unsigned int led_no,
+			       enum mt6370_led_mode mode)
+{
+	enum mt6370_led_field sel_field;
+
+	switch (led_no) {
+	case MT6370_LED_ISNK1:
+		sel_field = F_LED1_MODE;
+		break;
+	case MT6370_LED_ISNK2:
+		sel_field = F_LED2_MODE;
+		break;
+	case MT6370_LED_ISNK3:
+		sel_field = F_LED3_MODE;
+		break;
+	default:
+		sel_field = F_LED4_MODE;
+		break;
+	}
+
+	return regmap_field_write(priv->fields[sel_field], mode);
+}
+
+static int mt6370_mc_brightness_set(struct led_classdev *lcdev, enum led_brightness level)
+{
+	struct led_classdev_mc *mccdev = lcdev_to_mccdev(lcdev);
+	struct mt6370_led *led = container_of(mccdev, struct mt6370_led, mc);
+	struct mt6370_priv *priv = led->priv;
+	struct mc_subled *subled;
+	unsigned int enable, disable;
+	int i, ret;
+
+	mutex_lock(&priv->lock);
+
+	led_mc_calc_color_components(mccdev, level);
+
+	ret = regmap_field_read(priv->fields[F_RGB_EN], &enable);
+	if (ret)
+		goto out_unlock;
+
+	disable = enable;
+
+	for (i = 0; i < mccdev->num_colors; i++) {
+		u32 brightness;
+
+		subled = mccdev->subled_info + i;
+		brightness = min(subled->brightness, lcdev->max_brightness);
+		disable &= ~MT6370_CHEN_BIT(subled->channel);
+
+		if (level == 0) {
+			enable &= ~MT6370_CHEN_BIT(subled->channel);
+
+			ret = mt6370_set_led_mode(priv, subled->channel, MT6370_LED_REG_MODE);
+			if (ret)
+				goto out_unlock;
+
+			continue;
+		}
+
+		if (brightness == 0) {
+			enable &= ~MT6370_CHEN_BIT(subled->channel);
+			continue;
+		}
+
+		enable |= MT6370_CHEN_BIT(subled->channel);
+
+		ret = mt6370_set_led_brightness(priv, subled->channel, brightness);
+		if (ret)
+			goto out_unlock;
+	}
+
+	ret = regmap_field_write(priv->fields[F_RGB_EN], disable);
+	if (ret)
+		goto out_unlock;
+
+	ret = regmap_field_write(priv->fields[F_RGB_EN], enable);
+
+out_unlock:
+	mutex_unlock(&priv->lock);
+
+	return ret;
+}
+
+static int mt6370_mc_blink_set(struct led_classdev *lcdev,
+			       unsigned long *delay_on,
+			       unsigned long *delay_off)
+{
+	struct led_classdev_mc *mccdev = lcdev_to_mccdev(lcdev);
+	struct mt6370_led *led = container_of(mccdev, struct mt6370_led, mc);
+	struct mt6370_priv *priv = led->priv;
+	struct mc_subled *subled;
+	unsigned int enable, disable;
+	int i, ret;
+
+	mutex_lock(&priv->lock);
+
+	if (!*delay_on && !*delay_off)
+		*delay_on = *delay_off = 500;
+
+	ret = regmap_field_read(priv->fields[F_RGB_EN], &enable);
+	if (ret)
+		goto out_unlock;
+
+	disable = enable;
+
+	for (i = 0; i < mccdev->num_colors; i++) {
+		subled = mccdev->subled_info + i;
+
+		disable &= ~MT6370_CHEN_BIT(subled->channel);
+
+		ret = mt6370_set_led_duty(priv, subled->channel, *delay_on, *delay_off);
+		if (ret)
+			goto out_unlock;
+
+		ret = mt6370_set_led_freq(priv, subled->channel, *delay_on, *delay_off);
+		if (ret)
+			goto out_unlock;
+
+		ret = mt6370_set_led_mode(priv, subled->channel, MT6370_LED_PWM_MODE);
+		if (ret)
+			goto out_unlock;
+	}
+
+	/* Toggle to make pattern timing the same */
+	ret = regmap_field_write(priv->fields[F_RGB_EN], disable);
+	if (ret)
+		goto out_unlock;
+
+	ret = regmap_field_write(priv->fields[F_RGB_EN], enable);
+
+out_unlock:
+	mutex_unlock(&priv->lock);
+
+	return ret;
+}
+
+static int mt6370_mc_pattern_set(struct led_classdev *lcdev, struct led_pattern *pattern, u32 len,
+				 int repeat)
+{
+	struct led_classdev_mc *mccdev = lcdev_to_mccdev(lcdev);
+	struct mt6370_led *led = container_of(mccdev, struct mt6370_led, mc);
+	struct mt6370_priv *priv = led->priv;
+	struct mc_subled *subled;
+	unsigned int reg_base, enable, disable;
+	u8 params[P_MAX_PATTERNS / 2];
+	int i, ret;
+
+	mutex_lock(&priv->lock);
+
+	ret = mt6370_gen_breath_pattern(priv, pattern, len, params, sizeof(params));
+	if (ret)
+		goto out_unlock;
+
+	ret = regmap_field_read(priv->fields[F_RGB_EN], &enable);
+	if (ret)
+		goto out_unlock;
+
+	disable = enable;
+
+	for (i = 0; i < mccdev->num_colors; i++) {
+		subled = mccdev->subled_info + i;
+
+		mt6370_get_breath_reg_base(priv, subled->channel, &reg_base);
+		disable &= ~MT6370_CHEN_BIT(subled->channel);
+
+		ret = regmap_raw_write(priv->regmap, reg_base, params, sizeof(params));
+		if (ret)
+			goto out_unlock;
+
+		ret = mt6370_set_led_mode(priv, subled->channel, MT6370_LED_BREATH_MODE);
+		if (ret)
+			goto out_unlock;
+	}
+
+	/* Toggle to make pattern timing be the same */
+	ret = regmap_field_write(priv->fields[F_RGB_EN], disable);
+	if (ret)
+		goto out_unlock;
+
+	ret = regmap_field_write(priv->fields[F_RGB_EN], enable);
+
+out_unlock:
+	mutex_unlock(&priv->lock);
+
+	return ret;
+}
+
+static inline int mt6370_mc_pattern_clear(struct led_classdev *lcdev)
+{
+	struct led_classdev_mc *mccdev = lcdev_to_mccdev(lcdev);
+	struct mt6370_led *led = container_of(mccdev, struct mt6370_led, mc);
+	struct mt6370_priv *priv = led->priv;
+	struct mc_subled *subled;
+	int i, ret;
+
+	mutex_lock(&led->priv->lock);
+
+	for (i = 0; i < mccdev->num_colors; i++) {
+		subled = mccdev->subled_info + i;
+
+		ret = mt6370_set_led_mode(priv, subled->channel, MT6370_LED_REG_MODE);
+		if (ret)
+			break;
+	}
+
+	mutex_unlock(&led->priv->lock);
+
+	return ret;
+}
+
+static int mt6370_isnk_brightness_set(struct led_classdev *lcdev,
+				      enum led_brightness level)
+{
+	struct mt6370_led *led = container_of(lcdev, struct mt6370_led, isink);
+	struct mt6370_priv *priv = led->priv;
+	unsigned int enable;
+	int ret;
+
+	mutex_lock(&priv->lock);
+
+	ret = regmap_field_read(priv->fields[F_RGB_EN], &enable);
+	if (ret)
+		goto out_unlock;
+
+	if (level == 0) {
+		enable &= ~MT6370_CHEN_BIT(led->index);
+
+		ret = mt6370_set_led_mode(priv, led->index, MT6370_LED_REG_MODE);
+		if (ret)
+			goto out_unlock;
+	} else {
+		enable |= MT6370_CHEN_BIT(led->index);
+
+		ret = mt6370_set_led_brightness(priv, led->index, level);
+		if (ret)
+			goto out_unlock;
+	}
+
+	ret = regmap_field_write(priv->fields[F_RGB_EN], enable);
+
+out_unlock:
+	mutex_unlock(&priv->lock);
+
+	return ret;
+}
+
+static int mt6370_isnk_blink_set(struct led_classdev *lcdev, unsigned long *delay_on,
+				 unsigned long *delay_off)
+{
+	struct mt6370_led *led = container_of(lcdev, struct mt6370_led, isink);
+	struct mt6370_priv *priv = led->priv;
+	int ret;
+
+	mutex_lock(&priv->lock);
+
+	if (!*delay_on && !*delay_off)
+		*delay_on = *delay_off = 500;
+
+	ret = mt6370_set_led_duty(priv, led->index, *delay_on, *delay_off);
+	if (ret)
+		goto out_unlock;
+
+	ret = mt6370_set_led_freq(priv, led->index, *delay_on, *delay_off);
+	if (ret)
+		goto out_unlock;
+
+	ret = mt6370_set_led_mode(priv, led->index, MT6370_LED_PWM_MODE);
+
+out_unlock:
+	mutex_unlock(&priv->lock);
+
+	return ret;
+}
+
+static int mt6370_isnk_pattern_set(struct led_classdev *lcdev, struct led_pattern *pattern, u32 len,
+				   int repeat)
+{
+	struct mt6370_led *led = container_of(lcdev, struct mt6370_led, isink);
+	struct mt6370_priv *priv = led->priv;
+	unsigned int reg_base;
+	u8 params[P_MAX_PATTERNS / 2];
+	int ret;
+
+	mutex_lock(&priv->lock);
+
+	ret = mt6370_gen_breath_pattern(priv, pattern, len, params, sizeof(params));
+	if (ret)
+		goto out_unlock;
+
+	mt6370_get_breath_reg_base(priv, led->index, &reg_base);
+
+	ret = regmap_raw_write(priv->regmap, reg_base, params, sizeof(params));
+	if (ret)
+		goto out_unlock;
+
+	ret = mt6370_set_led_mode(priv, led->index, MT6370_LED_BREATH_MODE);
+
+out_unlock:
+	mutex_unlock(&priv->lock);
+
+	return ret;
+}
+
+static inline int mt6370_isnk_pattern_clear(struct led_classdev *lcdev)
+{
+	struct mt6370_led *led = container_of(lcdev, struct mt6370_led, isink);
+	struct mt6370_priv *priv = led->priv;
+	int ret;
+
+	mutex_lock(&led->priv->lock);
+	ret = mt6370_set_led_mode(priv, led->index, MT6370_LED_REG_MODE);
+	mutex_unlock(&led->priv->lock);
+
+	return ret;
+}
+
+static int mt6370_assign_multicolor_info(struct device *dev, struct mt6370_led *led,
+					 struct fwnode_handle *fwnode)
+{
+	struct mt6370_priv *priv = led->priv;
+	struct fwnode_handle *child;
+	struct mc_subled *sub_led;
+	u32 num_color = 0;
+	int ret;
+
+	sub_led = devm_kcalloc(dev, MC_CHANNEL_NUM, sizeof(*sub_led), GFP_KERNEL);
+	if (!sub_led)
+		return -ENOMEM;
+
+	fwnode_for_each_child_node(fwnode, child) {
+		u32 reg, color;
+
+		ret = fwnode_property_read_u32(child, "reg", &reg);
+		if (ret || reg > MT6370_LED_ISNK3 || priv->leds_active & BIT(reg)) {
+			fwnode_handle_put(child);
+			return -EINVAL;
+		}
+
+		ret = fwnode_property_read_u32(child, "color", &color);
+		if (ret) {
+			fwnode_handle_put(child);
+			return dev_err_probe(dev, ret, "LED %d, no color specified\n", led->index);
+		}
+
+		priv->leds_active |= BIT(reg);
+		sub_led[num_color].color_index = color;
+		sub_led[num_color].channel = reg;
+		sub_led[num_color].intensity = 0;
+		num_color++;
+	}
+
+	if (num_color < 2)
+		return dev_err_probe(dev, -EINVAL,
+				     "Multicolor must include 2 or more LED channels\n");
+
+	led->mc.num_colors = num_color;
+	led->mc.subled_info = sub_led;
+
+	return 0;
+}
+
+static int mt6370_init_led_properties(struct device *dev, struct mt6370_led *led,
+				      struct led_init_data *init_data)
+{
+	struct mt6370_priv *priv = led->priv;
+	struct led_classdev *lcdev;
+	enum mt6370_led_ranges sel_range;
+	u32 max_uA, max_level;
+	int ret;
+
+	if (led->index == MT6370_VIRTUAL_MULTICOLOR) {
+		ret = mt6370_assign_multicolor_info(dev, led, init_data->fwnode);
+		if (ret)
+			return ret;
+
+		lcdev = &led->mc.led_cdev;
+		lcdev->brightness_set_blocking = mt6370_mc_brightness_set;
+		lcdev->blink_set = mt6370_mc_blink_set;
+		lcdev->pattern_set = mt6370_mc_pattern_set;
+		lcdev->pattern_clear = mt6370_mc_pattern_clear;
+	} else {
+		lcdev = &led->isink;
+		lcdev->brightness_set_blocking = mt6370_isnk_brightness_set;
+		lcdev->blink_set = mt6370_isnk_blink_set;
+		lcdev->pattern_set = mt6370_isnk_pattern_set;
+		lcdev->pattern_clear = mt6370_isnk_pattern_clear;
+	}
+
+	ret = fwnode_property_read_u32(init_data->fwnode, "led-max-microamp", &max_uA);
+	if (ret) {
+		dev_warn(dev, "Not specified led-max-microamp, config to the minimum\n");
+		max_uA = 0;
+	}
+
+	if (led->index == MT6370_LED_ISNK4)
+		sel_range = R_LED4_CURR;
+	else
+		sel_range = R_LED123_CURR;
+
+	linear_range_get_selector_within(priv->ranges + sel_range, max_uA, &max_level);
+
+	lcdev->max_brightness = max_level;
+
+	led->default_state = led_init_default_state_get(init_data->fwnode);
+
+	return 0;
+}
+
+static int mt6370_isnk_init_default_state(struct mt6370_led *led)
+{
+	struct mt6370_priv *priv = led->priv;
+	unsigned int enable, level;
+	int ret;
+
+	ret = mt6370_get_led_brightness(priv, led->index, &level);
+	if (ret)
+		return ret;
+
+	ret = regmap_field_read(priv->fields[F_RGB_EN], &enable);
+	if (ret)
+		return ret;
+
+	if (!(enable & MT6370_CHEN_BIT(led->index)))
+		level = 0;
+
+	switch (led->default_state) {
+	case LEDS_DEFSTATE_ON:
+		led->isink.brightness = led->isink.max_brightness;
+		break;
+	case LEDS_DEFSTATE_KEEP:
+		led->isink.brightness = min(level, led->isink.max_brightness);
+		break;
+	default:
+		led->isink.brightness = 0;
+		break;
+	}
+
+	return mt6370_isnk_brightness_set(&led->isink, led->isink.brightness);
+}
+
+static int mt6370_multicolor_led_register(struct device *dev, struct mt6370_led *led,
+					  struct led_init_data *init_data)
+{
+	int ret;
+
+	ret = mt6370_mc_brightness_set(&led->mc.led_cdev, 0);
+	if (ret)
+		return dev_err_probe(dev, ret, "Couldn't set multicolor brightness\n");
+
+	ret = devm_led_classdev_multicolor_register_ext(dev, &led->mc, init_data);
+	if (ret)
+		return dev_err_probe(dev, ret, "Couldn't register multicolor\n");
+
+	return 0;
+}
+
+static int mt6370_led_register(struct device *dev, struct mt6370_led *led,
+			       struct led_init_data *init_data)
+{
+	struct mt6370_priv *priv = led->priv;
+	int ret;
+
+	if (led->index == MT6370_VIRTUAL_MULTICOLOR)
+		return mt6370_multicolor_led_register(dev, led, init_data);
+
+	/* If ISNK4 is declared, change its mode from HW auto to SW control */
+	if (led->index == MT6370_LED_ISNK4) {
+		ret = regmap_field_write(priv->fields[F_CHGIND_EN], 1);
+		if (ret)
+			return dev_err_probe(dev, ret, "Failed to set CHRIND to SW\n");
+	}
+
+	ret = mt6370_isnk_init_default_state(led);
+	if (ret)
+		return dev_err_probe(dev, ret, "Failed to init %d isnk state\n", led->index);
+
+	ret = devm_led_classdev_register_ext(dev, &led->isink, init_data);
+	if (ret)
+		return dev_err_probe(dev, ret, "Couldn't register isink %d\n", led->index);
+
+	return 0;
+}
+
+static int mt6370_check_vendor_info(struct mt6370_priv *priv)
+{
+	unsigned int devinfo, vid;
+	int ret;
+
+	ret = regmap_read(priv->regmap, MT6370_REG_DEV_INFO, &devinfo);
+	if (ret)
+		return ret;
+
+	vid = FIELD_GET(MT6370_VENDOR_ID_MASK, devinfo);
+	if (vid == MT6372_VENDOR_ID || vid == MT6372C_VENDOR_ID) {
+		priv->reg_fields = mt6372_reg_fields;
+		priv->ranges = mt6372_led_ranges;
+		priv->pdata = &mt6372_pdata;
+	} else {
+		/* Common for MT6370/71 */
+		priv->reg_fields = common_reg_fields;
+		priv->ranges = common_led_ranges;
+		priv->pdata = &common_pdata;
+	}
+
+	return 0;
+}
+
+static int mt6370_leds_probe(struct platform_device *pdev)
+{
+	struct device *dev = &pdev->dev;
+	struct mt6370_priv *priv;
+	struct fwnode_handle *child;
+	size_t count;
+	unsigned int i = 0;
+	int ret;
+
+	count = device_get_child_node_count(dev);
+	if (!count || count > MT6370_MAX_LEDS)
+		return dev_err_probe(dev, -EINVAL,
+				     "No child node or node count over max LED number %zu\n",
+				      count);
+
+	priv = devm_kzalloc(dev, struct_size(priv, leds, count), GFP_KERNEL);
+	if (!priv)
+		return -ENOMEM;
+
+	priv->leds_count = count;
+	mutex_init(&priv->lock);
+
+	priv->regmap = dev_get_regmap(dev->parent, NULL);
+	if (!priv->regmap)
+		return dev_err_probe(dev, -ENODEV, "Failed to get parent regmap\n");
+
+	ret = mt6370_check_vendor_info(priv);
+	if (ret)
+		return dev_err_probe(dev, ret, "Failed to check vendor info\n");
+
+	ret = devm_regmap_field_bulk_alloc(dev, priv->regmap, priv->fields, priv->reg_fields,
+					   F_MAX_FIELDS);
+	if (ret)
+		return dev_err_probe(dev, ret, "Failed to allocate regmap field\n");
+
+	device_for_each_child_node(dev, child) {
+		struct mt6370_led *led = priv->leds + i++;
+		struct led_init_data init_data = { .fwnode = child };
+		u32 reg, color;
+
+		ret = fwnode_property_read_u32(child, "reg", &reg);
+		if (ret) {
+			dev_err(dev, "Failed to parse reg property\n");
+			goto fwnode_release;
+		}
+
+		if (reg >= MT6370_MAX_LEDS) {
+			ret = -EINVAL;
+			dev_err(dev, "Error reg property number\n");
+			goto fwnode_release;
+		}
+
+		ret = fwnode_property_read_u32(child, "color", &color);
+		if (ret) {
+			dev_err(dev, "Failed to parse color property\n");
+			goto fwnode_release;
+		}
+
+		if (color == LED_COLOR_ID_RGB || color == LED_COLOR_ID_MULTI)
+			reg = MT6370_VIRTUAL_MULTICOLOR;
+
+		if (priv->leds_active & BIT(reg)) {
+			ret = -EINVAL;
+			dev_err(dev, "Duplicate reg property\n");
+			goto fwnode_release;
+		}
+
+		priv->leds_active |= BIT(reg);
+
+		led->index = reg;
+		led->priv = priv;
+
+		ret = mt6370_init_led_properties(dev, led, &init_data);
+		if (ret)
+			goto fwnode_release;
+
+		ret = mt6370_led_register(dev, led, &init_data);
+		if (ret)
+			goto fwnode_release;
+	}
+
+	return 0;
+
+fwnode_release:
+	fwnode_handle_put(child);
+	return ret;
+}
+
+static const struct of_device_id mt6370_rgbled_device_table[] = {
+	{ .compatible = "mediatek,mt6370-indicator" },
+	{}
+};
+MODULE_DEVICE_TABLE(of, mt6370_rgbled_device_table);
+
+static struct platform_driver mt6370_rgbled_driver = {
+	.driver = {
+		.name = "mt6370-indicator",
+		.of_match_table = mt6370_rgbled_device_table,
+	},
+	.probe = mt6370_leds_probe,
+};
+module_platform_driver(mt6370_rgbled_driver);
+
+MODULE_AUTHOR("Alice Chen <[e-mail]>");
+MODULE_AUTHOR("ChiYuan Huang <[e-mail]>");
+MODULE_DESCRIPTION("MediaTek MT6370 RGB LED Driver");
+MODULE_LICENSE("GPL");

drivers/leds/rgb/leds-pwm-multicolor.c

···
 	ret = led_pwm_mc_set(cdev, cdev->brightness);
 	if (ret)
 		return dev_err_probe(&pdev->dev, ret,
-				     "failed to set led PWM value for %s: %d",
-				     cdev->name, ret);
+				     "failed to set led PWM value for %s\n",
+				     cdev->name);
 
 	platform_set_drvdata(pdev, priv);
 	return 0;

drivers/leds/rgb/leds-qcom-lpg.c

···
 /*
  * Copyright (c) 2017-2022 Linaro Ltd
  * Copyright (c) 2010-2012, The Linux Foundation. All rights reserved.
+ * Copyright (c) 2023, Qualcomm Innovation Center, Inc. All rights reserved.
  */
 #include <linux/bits.h>
 #include <linux/bitfield.h>
···
 #define LPG_SUBTYPE_REG		0x05
 #define  LPG_SUBTYPE_LPG	0x2
 #define  LPG_SUBTYPE_PWM	0xb
+#define  LPG_SUBTYPE_HI_RES_PWM	0xc
 #define  LPG_SUBTYPE_LPG_LITE	0x11
 #define LPG_PATTERN_CONFIG_REG	0x40
 #define LPG_SIZE_CLK_REG	0x41
 #define  PWM_CLK_SELECT_MASK	GENMASK(1, 0)
+#define  PWM_CLK_SELECT_HI_RES_MASK	GENMASK(2, 0)
+#define  PWM_SIZE_HI_RES_MASK	GENMASK(6, 4)
 #define LPG_PREDIV_CLK_REG	0x42
 #define  PWM_FREQ_PRE_DIV_MASK	GENMASK(6, 5)
 #define  PWM_FREQ_EXP_MASK	GENMASK(2, 0)
···
 #define LPG_LUT_REG(x)		(0x40 + (x) * 2)
 #define RAMP_CONTROL_REG	0xc8
 
-#define LPG_RESOLUTION		512
+#define LPG_RESOLUTION_9BIT	BIT(9)
+#define LPG_RESOLUTION_15BIT	BIT(15)
 #define LPG_MAX_M		7
+#define LPG_MAX_PREDIV		6
 
 struct lpg_channel;
 struct lpg_data;
···
  * @clk_sel:	reference clock frequency selector
  * @pre_div_sel: divider selector of the reference clock
  * @pre_div_exp: exponential divider of the reference clock
+ * @pwm_resolution_sel:	pwm resolution selector
  * @ramp_enabled: duty cycle is driven by iterating over lookup table
  * @ramp_ping_pong: reverse through pattern, rather than wrapping to start
  * @ramp_oneshot: perform only a single pass over the pattern
···
 	unsigned int clk_sel;
 	unsigned int pre_div_sel;
 	unsigned int pre_div_exp;
+	unsigned int pwm_resolution_sel;
 
 	bool ramp_enabled;
 	bool ramp_ping_pong;
···
 }
 
 static const unsigned int lpg_clk_rates[] = {0, 1024, 32768, 19200000};
+static const unsigned int lpg_clk_rates_hi_res[] = {0, 1024, 32768, 19200000, 76800000};
 static const unsigned int lpg_pre_divs[] = {1, 3, 5, 6};
+static const unsigned int lpg_pwm_resolution[] =  {9};
+static const unsigned int lpg_pwm_resolution_hi_res[] =  {8, 9, 10, 11, 12, 13, 14, 15};
 
 static int lpg_calc_freq(struct lpg_channel *chan, uint64_t period)
 {
-	unsigned int clk_sel, best_clk = 0;
+	unsigned int i, pwm_resolution_count, best_pwm_resolution_sel = 0;
+	const unsigned int *clk_rate_arr, *pwm_resolution_arr;
+	unsigned int clk_sel, clk_len, best_clk = 0;
 	unsigned int div, best_div = 0;
 	unsigned int m, best_m = 0;
+	unsigned int resolution;
 	unsigned int error;
 	unsigned int best_err = UINT_MAX;
+	u64 max_period, min_period;
 	u64 best_period = 0;
-	u64 max_period;
+	u64 max_res;
 
 	/*
 	 * The PWM period is determined by:
···
 	 * period = --------------------------
 	 *                   refclk
 	 *
-	 * With resolution fixed at 2^9 bits, pre_div = {1, 3, 5, 6} and
+	 * Resolution = 2^9 bits for PWM or
+	 *              2^{8, 9, 10, 11, 12, 13, 14, 15} bits for high resolution PWM
+	 * pre_div = {1, 3, 5, 6} and
 	 * M = [0..7].
 	 *
-	 * This allows for periods between 27uS and 384s, as the PWM framework
-	 * wants a period of equal or lower length than requested, reject
-	 * anything below 27uS.
+	 * This allows for periods between 27uS and 384s for PWM channels and periods between
+	 * 3uS and 24576s for high resolution PWMs.
+	 * The PWM framework wants a period of equal or lower length than requested,
+	 * reject anything below minimum period.
 	 */
-	if (period <= (u64)NSEC_PER_SEC * LPG_RESOLUTION / 19200000)
+
+	if (chan->subtype == LPG_SUBTYPE_HI_RES_PWM) {
+		clk_rate_arr = lpg_clk_rates_hi_res;
+		clk_len = ARRAY_SIZE(lpg_clk_rates_hi_res);
+		pwm_resolution_arr = lpg_pwm_resolution_hi_res;
+		pwm_resolution_count = ARRAY_SIZE(lpg_pwm_resolution_hi_res);
+		max_res = LPG_RESOLUTION_15BIT;
+	} else {
+		clk_rate_arr = lpg_clk_rates;
+		clk_len = ARRAY_SIZE(lpg_clk_rates);
+		pwm_resolution_arr = lpg_pwm_resolution;
+		pwm_resolution_count = ARRAY_SIZE(lpg_pwm_resolution);
+		max_res = LPG_RESOLUTION_9BIT;
+	}
+
+	min_period = (u64)NSEC_PER_SEC *
+			div64_u64((1 << pwm_resolution_arr[0]), clk_rate_arr[clk_len - 1]);
+	if (period <= min_period)
 		return -EINVAL;
 
 	/* Limit period to largest possible value, to avoid overflows */
-	max_period = (u64)NSEC_PER_SEC * LPG_RESOLUTION * 6 * (1 << LPG_MAX_M) / 1024;
+	max_period = (u64)NSEC_PER_SEC * max_res * LPG_MAX_PREDIV *
+			div64_u64((1 << LPG_MAX_M), 1024);
 	if (period > max_period)
 		period = max_period;
 
 	/*
-	 * Search for the pre_div, refclk and M by solving the rewritten formula
-	 * for each refclk and pre_div value:
+	 * Search for the pre_div, refclk, resolution and M by solving the rewritten formula
+	 * for each refclk, resolution and pre_div value:
 	 *
 	 *                     period * refclk
 	 * M = log2 -------------------------------------
 	 *           NSEC_PER_SEC * pre_div * resolution
 	 */
-	for (clk_sel = 1; clk_sel < ARRAY_SIZE(lpg_clk_rates); clk_sel++) {
-		u64 numerator = period * lpg_clk_rates[clk_sel];
 
-		for (div = 0; div < ARRAY_SIZE(lpg_pre_divs); div++) {
-			u64 denominator = (u64)NSEC_PER_SEC * lpg_pre_divs[div] * LPG_RESOLUTION;
-			u64 actual;
-			u64 ratio;
+	for (i = 0; i < pwm_resolution_count; i++) {
+		resolution = 1 << pwm_resolution_arr[i];
+		for (clk_sel = 1; clk_sel < clk_len; clk_sel++) {
+			u64 numerator = period * clk_rate_arr[clk_sel];
 
-			if (numerator < denominator)
-				continue;
+			for (div = 0; div < ARRAY_SIZE(lpg_pre_divs); div++) {
+				u64 denominator = (u64)NSEC_PER_SEC * lpg_pre_divs[div] *
+						  resolution;
+				u64 actual;
+				u64 ratio;
 
-			ratio = div64_u64(numerator, denominator);
-			m = ilog2(ratio);
-			if (m > LPG_MAX_M)
-				m = LPG_MAX_M;
+				if (numerator < denominator)
+					continue;
 
-			actual = DIV_ROUND_UP_ULL(denominator * (1 << m), lpg_clk_rates[clk_sel]);
+				ratio = div64_u64(numerator, denominator);
+				m = ilog2(ratio);
+				if (m > LPG_MAX_M)
+					m = LPG_MAX_M;
 
-			error = period - actual;
-			if (error < best_err) {
-				best_err = error;
-
-				best_div = div;
-				best_m = m;
-				best_clk = clk_sel;
-				best_period = actual;
+				actual = DIV_ROUND_UP_ULL(denominator * (1 << m),
+							  clk_rate_arr[clk_sel]);
+				error = period - actual;
+				if (error < best_err) {
+					best_err = error;
+					best_div = div;
+					best_m = m;
+					best_clk = clk_sel;
+					best_period = actual;
+					best_pwm_resolution_sel = i;
+				}
 			}
 		}
 	}
-
 	chan->clk_sel = best_clk;
 	chan->pre_div_sel = best_div;
 	chan->pre_div_exp = best_m;
 	chan->period = best_period;
-
+	chan->pwm_resolution_sel = best_pwm_resolution_sel;
 	return 0;
 }
 
 static void lpg_calc_duty(struct lpg_channel *chan, uint64_t duty)
 {
-	unsigned int max = LPG_RESOLUTION - 1;
+	unsigned int max;
 	unsigned int val;
+	unsigned int clk_rate;
 
-	val = div64_u64(duty * lpg_clk_rates[chan->clk_sel],
+	if (chan->subtype == LPG_SUBTYPE_HI_RES_PWM) {
+		max = LPG_RESOLUTION_15BIT - 1;
+		clk_rate = lpg_clk_rates_hi_res[chan->clk_sel];
+	} else {
+		max = LPG_RESOLUTION_9BIT - 1;
+		clk_rate = lpg_clk_rates[chan->clk_sel];
+	}
+
+	val = div64_u64(duty * clk_rate,
 			(u64)NSEC_PER_SEC * lpg_pre_divs[chan->pre_div_sel] * (1 << chan->pre_div_exp));
 
 	chan->pwm_value = min(val, max);
···
 
 	val = chan->clk_sel;
 
-	/* Specify 9bit resolution, based on the subtype of the channel */
+	/* Specify resolution, based on the subtype of the channel */
 	switch (chan->subtype) {
 	case LPG_SUBTYPE_LPG:
 		val |= GENMASK(5, 4);
 		break;
 	case LPG_SUBTYPE_PWM:
 		val |= BIT(2);
+		break;
+	case LPG_SUBTYPE_HI_RES_PWM:
+		val |= FIELD_PREP(PWM_SIZE_HI_RES_MASK, chan->pwm_resolution_sel);
 		break;
 	case LPG_SUBTYPE_LPG_LITE:
 	default:
···
 	triled_set(lpg, triled_mask, triled_mask);
 
 	chan = led->channels[0];
-	duty = div_u64(chan->pwm_value * chan->period, LPG_RESOLUTION);
+	duty = div_u64(chan->pwm_value * chan->period, LPG_RESOLUTION_9BIT);
 	*delay_on = div_u64(duty, NSEC_PER_MSEC);
 	*delay_off = div_u64(chan->period - duty, NSEC_PER_MSEC);
 
···
 {
 	struct lpg *lpg = container_of(chip, struct lpg, pwm);
 	struct lpg_channel *chan = &lpg->channels[pwm->hwpwm];
+	unsigned int resolution;
 	unsigned int pre_div;
 	unsigned int refclk;
 	unsigned int val;
···
 	if (ret)
 		return ret;
 
-	refclk = lpg_clk_rates[val & PWM_CLK_SELECT_MASK];
+	if (chan->subtype == LPG_SUBTYPE_HI_RES_PWM) {
+		refclk = lpg_clk_rates_hi_res[FIELD_GET(PWM_CLK_SELECT_HI_RES_MASK, val)];
+		resolution = lpg_pwm_resolution_hi_res[FIELD_GET(PWM_SIZE_HI_RES_MASK, val)];
+	} else {
+		refclk = lpg_clk_rates[FIELD_GET(PWM_CLK_SELECT_MASK, val)];
+		resolution = 9;
+	}
+
 	if (refclk) {
 		ret = regmap_read(lpg->map, chan->base + LPG_PREDIV_CLK_REG, &val);
 		if (ret)
···
 		if (ret)
 			return ret;
 
-		state->period = DIV_ROUND_UP_ULL((u64)NSEC_PER_SEC * LPG_RESOLUTION * pre_div * (1 << m), refclk);
+		state->period = DIV_ROUND_UP_ULL((u64)NSEC_PER_SEC * (1 << resolution) *
+						 pre_div * (1 << m), refclk);
 		state->duty_cycle = DIV_ROUND_UP_ULL((u64)NSEC_PER_SEC * pwm_value * pre_div * (1 << m), refclk);
 	} else {
 		state->period = 0;
···
 	}
 
 	cdev->default_trigger = of_get_property(np, "linux,default-trigger", NULL);
-	cdev->max_brightness = LPG_RESOLUTION - 1;
+	cdev->max_brightness = LPG_RESOLUTION_9BIT - 1;
 
 	if (!of_property_read_string(np, "default-state", &state) &&
 	    !strcmp(state, "on"))
···
 	},
 };
 
+static const struct lpg_data pmk8550_pwm_data = {
+	.num_channels = 2,
+	.channels = (const struct lpg_channel_data[]) {
+		{ .base = 0xe800 },
+		{ .base = 0xe900 },
+	},
+};
+
 static const struct of_device_id lpg_of_table[] = {
 	{ .compatible = "qcom,pm8150b-lpg", .data = &pm8150b_lpg_data },
 	{ .compatible = "qcom,pm8150l-lpg", .data = &pm8150l_lpg_data },
···
 	{ .compatible = "qcom,pmi8994-lpg", .data = &pmi8994_lpg_data },
 	{ .compatible = "qcom,pmi8998-lpg", .data = &pmi8998_lpg_data },
 	{ .compatible = "qcom,pmc8180c-lpg", .data = &pm8150l_lpg_data },
+	{ .compatible = "qcom,pmk8550-pwm", .data = &pmk8550_pwm_data },
 	{}
 };
 MODULE_DEVICE_TABLE(of, lpg_of_table);

drivers/leds/trigger/Kconfig

···
 config LEDS_TRIGGER_GPIO
 	tristate "LED GPIO Trigger"
 	depends on GPIOLIB || COMPILE_TEST
+	depends on BROKEN
 	help
 	  This allows LEDs to be controlled by gpio events. It's good
 	  when using gpios as switches and triggering the needed LEDs

include/linux/leds.h

···
  *
  * Note that if software blinking is active, simply calling
  * led_cdev->brightness_set() will not stop the blinking,
- * use led_classdev_brightness_set() instead.
+ * use led_set_brightness() instead.
  */
 void led_blink_set(struct led_classdev *led_cdev, unsigned long *delay_on,
 		   unsigned long *delay_off);