regulator: dt-bindings: adi,adp5055-regulator: Add adp5055 support

Add documentation for devicetree bindings for ADP5055. The device consists
of 3 buck regulators able to connect to high input voltages of up to 18V
with no preregulators.

Reviewed-by: Krzysztof Kozlowski <[e-mail]>
Signed-off-by: Alexis Czezar Torreno <[e-mail]>
Link: https://patch.msgid.link/[e-mail]
Signed-off-by: Mark Brown <[e-mail]>

Documentation/devicetree/bindings/regulator/adi,adp5055-regulator.yaml

···
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/regulator/adi,adp5055-regulator.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Analog Devices ADP5055 Triple Buck Regulator
+
+maintainers:
+  - Alexis Czezar Torreno <[e-mail]>
+
+description: |
+  The ADP5055 combines three high performance buck regulator. The device enables
+  direct connection to high input voltages up to 18 V with no preregulators.
+  https://www.analog.com/media/en/technical-documentation/data-sheets/adp5055.pdf
+
+properties:
+  compatible:
+    enum:
+      - adi,adp5055
+
+  reg:
+    enum:
+      - 0x70
+      - 0x71
+
+  adi,tset-us:
+    description:
+      Setting time used by the device. This is changed via soldering specific
+      resistor values on the CFG2 pin.
+    enum: [2600, 20800]
+    default: 2600
+
+  adi,ocp-blanking:
+    description:
+      If present, overcurrent protection (OCP) blanking for all regulator is on.
+    type: boolean
+
+  adi,delay-power-good:
+    description:
+      Configures delay timer of the power good (PWRGD) pin. Delay is based on
+      Tset which can be 2.6 ms or 20.8 ms.
+    type: boolean
+
+  '#address-cells':
+    const: 1
+
+  '#size-cells':
+    const: 0
+
+patternProperties:
+  '^buck[0-2]$':
+    type: object
+    $ref: regulator.yaml#
+    unevaluatedProperties: false
+
+    properties:
+      enable-gpios:
+        maxItems: 1
+        description:
+          GPIO specifier to enable the GPIO control for each regulator. The
+          driver supports two modes of enable, hardware only (GPIOs) or software
+          only (Registers). Pure hardware enabling requires each regulator to
+          contain this property. If at least one regulator does not have this,
+          the driver automatically switches to software only mode.
+
+      adi,dvs-limit-upper-microvolt:
+        description:
+          Configure the allowable upper side limit of the voltage output of each
+          regulator in microvolt. Relative to the default Vref trimming value.
+          Vref = 600 mV. Voltages are in 12 mV steps, value is autoadjusted.
+          Vout_high = Vref_trim + dvs-limit-upper.
+        minimum: 12000
+        maximum: 192000
+        default: 192000
+
+      adi,dvs-limit-lower-microvolt:
+        description:
+          Configure the allowable lower side limit of the voltage output of each
+          regulator in microvolt. Relative to the default Vref trimming value.
+          Vref = 600 mV. Voltages are in 12 mV steps, value is autoadjusted.
+          Vout_low = Vref_trim + dvs-limit-lower.
+        minimum: -190500
+        maximum: -10500
+        default: -190500
+
+      adi,fast-transient:
+        description:
+          Configures the fast transient sensitivity for each regulator.
+          "none"    - No fast transient.
+          "3G_1.5%" - 1.5% window with 3*350uA/V
+          "5G_1.5%" - 1.5% window with 5*350uA/V
+          "5G_2.5%" - 2.5% window with 5*350uA/V
+        enum: [none, 3G_1.5%, 5G_1.5%, 5G_2.5%]
+        default: 5G_2.5%
+
+      adi,mask-power-good:
+        description:
+          If present, masks individual regulators PWRGD signal to the external
+          PWRGD hardware pin.
+        type: boolean
+
+    required:
+      - regulator-name
+
+required:
+  - compatible
+  - reg
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/gpio/gpio.h>
+
+    i2c {
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        regulator@70 {
+            compatible = "adi,adp5055";
+            reg = <0x70>;
+            #address-cells = <1>;
+            #size-cells = <0>;
+
+            adi,tset-us = <2600>;
+            adi,ocp-blanking;
+            adi,delay-power-good;
+
+            buck0 {
+                regulator-name = "buck0";
+                enable-gpios = <&gpio 17 GPIO_ACTIVE_HIGH>;
+                adi,dvs-limit-upper-microvolt = <192000>;
+                adi,dvs-limit-lower-microvolt = <(-190500)>;
+                adi,fast-transient = "5G_2.5%";
+                adi,mask-power-good;
+            };
+
+            buck1 {
+                regulator-name = "buck1";
+                enable-gpios = <&gpio 18 GPIO_ACTIVE_HIGH>;
+                adi,dvs-limit-upper-microvolt = <192000>;
+                adi,dvs-limit-lower-microvolt = <(-190500)>;
+                adi,fast-transient = "5G_2.5%";
+                adi,mask-power-good;
+            };
+
+            buck2 {
+                regulator-name = "buck2";
+                enable-gpios = <&gpio 19 GPIO_ACTIVE_HIGH>;
+                adi,dvs-limit-upper-microvolt = <192000>;
+                adi,dvs-limit-lower-microvolt = <(-190500)>;
+                adi,fast-transient = "5G_2.5%";
+                adi,mask-power-good;
+            };
+        };
+    };

MAINTAINERS

···
 F:	Documentation/devicetree/bindings/iio/filter/adi,admv8818.yaml
 F:	drivers/iio/filter/admv8818.c
 
+ANALOG DEVICES INC ADP5055 DRIVER
+M:	Alexis Czezar Torreno <[e-mail]>
+S:	Supported
+W:	https://ez.analog.com/linux-software-drivers
+F:	Documentation/devicetree/bindings/regulator/adi,adp5055-regulator.yaml
+
 ANALOG DEVICES INC ADP5061 DRIVER
 M:	Michael Hennerich <[e-mail]>
 L:	[e-mail]