regulator: dt-bindings: Convert fixed-regulator to json-schema

Fixed Voltage regulators

Required properties:

- compatible: Must be "regulator-fixed";

- regulator-name: Defined in regulator.txt as optional, but required here.

Optional properties:

- gpio: gpio to use for enable control

- startup-delay-us: startup time in microseconds

- enable-active-high: Polarity of GPIO is Active high

If this property is missing, the default assumed is Active low.

- gpio-open-drain: GPIO is open drain type.

  If this property is missing then default assumption is false.

-vin-supply: Input supply name.

Any property defined as part of the core regulator

binding, defined in regulator.txt, 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.

Example:

	abc: fixedregulator@0 {

		compatible = "regulator-fixed";

		regulator-name = "fixed-supply";

		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>;

	};

# 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.txt, 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.

properties:

  compatible:

    const: regulator-fixed

  regulator-name: true

  gpio:

    description: gpio to use for enable control

    maxItems: 1

  startup-delay-us:

    description: startup time in microseconds

    $ref: /schemas/types.yaml#/definitions/uint32

  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.

    $ref: /schemas/types.yaml#/definitions/phandle

required:

  - compatible

  - regulator-name

examples:

  - |

    abc: fixedregulator@0 {

      compatible = "regulator-fixed";

      regulator-name = "fixed-supply";

      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>;

    };

...