xref: /openbmc/linux/Documentation/devicetree/bindings/regulator/maxim,max8952.yaml (revision 8a1e6bb3)

# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
%YAML 1.2
---
$id: http://devicetree.org/schemas/regulator/maxim,max8952.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#

title: Maxim MAX8952 voltage regulator

maintainers:
  - Krzysztof Kozlowski <krzk@kernel.org>

allOf:
  - $ref: regulator.yaml#

properties:
  compatible:
    const: maxim,max8952

  max8952,default-mode:
    $ref: /schemas/types.yaml#/definitions/uint32
    enum: [0, 1, 2, 3]
    description: |
      index of default DVS voltage

  max8952,dvs-mode-microvolt:
    minItems: 4
    maxItems: 4
    items:
      minimum: 770000
      maximum: 1400000
    description: |
      Array of 4 integer values defining DVS voltages in microvolts. All values
      must be from range <770000, 1400000>.

  max8952,en-gpio:
    maxItems: 1
    description: |
      GPIO used to control enable status of regulator

  max8952,ramp-speed:
    $ref: /schemas/types.yaml#/definitions/uint32
    enum: [0, 1, 2, 3, 4, 5, 6, 7]
    default: 0
    description: |
      Voltage ramp speed, values map to:
       - 0: 32mV/us
       - 1: 16mV/us
       - 2: 8mV/us
       - 3: 4mV/us
       - 4: 2mV/us
       - 5: 1mV/us
       - 6: 0.5mV/us
       - 7: 0.25mV/us
      Defaults to 32mV/us if not specified.

  max8952,sync-freq:
    $ref: /schemas/types.yaml#/definitions/uint32
    enum: [0, 1, 2]
    default: 0
    description: |
      Sync frequency, values map to:
       - 0: 26 MHz
       - 1: 13 MHz
       - 2: 19.2 MHz
      Defaults to 26 MHz if not specified.

  max8952,vid-gpios:
    minItems: 2
    maxItems: 2
    description: |
      Array of two GPIO pins used for DVS voltage selection

  reg:
    maxItems: 1

required:
  - compatible
  - max8952,dvs-mode-microvolt
  - reg

unevaluatedProperties: false

examples:
  - |
    #include <dt-bindings/gpio/gpio.h>

    i2c {
        #address-cells = <1>;
        #size-cells = <0>;

        pmic@60 {
            compatible = "maxim,max8952";
            reg = <0x60>;

            max8952,vid-gpios = <&gpx0 3 GPIO_ACTIVE_HIGH>,
                                <&gpx0 4 GPIO_ACTIVE_HIGH>;
            max8952,default-mode = <0>;
            max8952,dvs-mode-microvolt = <1250000>, <1200000>,
                                         <1050000>, <950000>;
            max8952,sync-freq = <0>;
            max8952,ramp-speed = <0>;

            regulator-name = "VARM_1.2V_C210";
            regulator-min-microvolt = <770000>;
            regulator-max-microvolt = <1400000>;
            regulator-always-on;
            regulator-boot-on;
        };
    };