Documentation/devicetree/bindings/regulator/fixed-regulator.yaml

# SPDX-License-Identifier: GPL-2.0
%YAML 1.2
---
$id: http://devicetree.org/schemas/regulator/fixed-regulator.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#

title: Fixed Voltage regulators

maintainers:
  - Liam Girdwood <lgirdwood@gmail.com>
  - Mark Brown <broonie@kernel.org>

description:
  Any property defined as part of the core regulator binding, defined in
  regulator.yaml, can also be used. However a fixed voltage regulator is
  expected to have the regulator-min-microvolt and regulator-max-microvolt
  to be the same.

allOf:
  - $ref: "regulator.yaml#"
  - if:
      properties:
        compatible:
          contains:
            const: regulator-fixed-clock
    then:
      required:
        - clocks
  - if:
      properties:
        compatible:
          contains:
            const: regulator-fixed-domain
    then:
      required:
        - power-domains
        - required-opps

properties:
  compatible:
    enum:
      - regulator-fixed
      - regulator-fixed-clock
      - regulator-fixed-domain

  regulator-name: true

  gpio:
    description: gpio to use for enable control
    maxItems: 1

  clocks:
    description:
      clock to use for enable control. This binding is only available if
      the compatible is chosen to regulator-fixed-clock. The clock binding
      is mandatory if compatible is chosen to regulator-fixed-clock.
    maxItems: 1

  power-domains:
    deprecated: true
    description:
      Power domain to use for enable control. This binding is only
      available if the compatible is chosen to regulator-fixed-domain.
    maxItems: 1

  required-opps:
    deprecated: true
    description:
      Performance state to use for enable control. This binding is only
      available if the compatible is chosen to regulator-fixed-domain. The
      power-domain binding is mandatory if compatible is chosen to
      regulator-fixed-domain.
    maxItems: 1

  startup-delay-us:
    description: startup time in microseconds

  off-on-delay-us:
    description: off delay time in microseconds

  enable-active-high:
    description:
      Polarity of GPIO is Active high. If this property is missing,
      the default assumed is Active low.
    type: boolean

  gpio-open-drain:
    description:
      GPIO is open drain type. If this property is missing then default
      assumption is false.
    type: boolean

  vin-supply:
    description: Input supply phandle.

required:
  - compatible
  - regulator-name

unevaluatedProperties: false

examples:
  - |
    reg_1v8: regulator-1v8 {
      compatible = "regulator-fixed";
      regulator-name = "1v8";
      regulator-min-microvolt = <1800000>;
      regulator-max-microvolt = <1800000>;
      gpio = <&gpio1 16 0>;
      startup-delay-us = <70000>;
      enable-active-high;
      regulator-boot-on;
      gpio-open-drain;
      vin-supply = <&parent_reg>;
    };
    reg_1v8_clk: regulator-1v8-clk {
      compatible = "regulator-fixed-clock";
      regulator-name = "1v8";
      regulator-min-microvolt = <1800000>;
      regulator-max-microvolt = <1800000>;
      clocks = <&clock1>;
      startup-delay-us = <70000>;
      enable-active-high;
      regulator-boot-on;
      vin-supply = <&parent_reg>;
    };
    reg_1v8_domain: regulator-1v8-domain {
      compatible = "regulator-fixed-domain";
      regulator-name = "1v8";
      regulator-min-microvolt = <1800000>;
      regulator-max-microvolt = <1800000>;
      power-domains = <&domain1>;
      required-opps = <&domain1_state1>;
      startup-delay-us = <70000>;
      enable-active-high;
      regulator-boot-on;
      vin-supply = <&parent_reg>;
    };
...