dt-bindings: clock: gpio-mux-clock: Convert to json-schema

Binding for simple gpio clock multiplexer.

This binding uses the common clock binding[1].

[1] Documentation/devicetree/bindings/clock/clock-bindings.txt

Required properties:

- compatible : shall be "gpio-mux-clock".

- clocks: list of two references to parent clocks.

- #clock-cells : from common clock binding; shall be set to 0.

- select-gpios : GPIO reference for selecting the parent clock.

Example:

	clock {

		compatible = "gpio-mux-clock";

		clocks = <&parentclk1>, <&parentclk2>;

		#clock-cells = <0>;

		select-gpios = <&gpio 1 GPIO_ACTIVE_HIGH>;

	};

# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)

%YAML 1.2

---

$id: http://devicetree.org/schemas/clock/gpio-mux-clock.yaml#

$schema: http://devicetree.org/meta-schemas/core.yaml#

title: Simple GPIO clock multiplexer

maintainers:

  - Sergej Sawazki <ce3a@gmx.de>

properties:

  compatible:

    const: gpio-mux-clock

  clocks:

    items:

      - description: First parent clock

      - description: Second parent clock

  '#clock-cells':

    const: 0

  select-gpios:

    description: GPIO reference for selecting the parent clock.

    maxItems: 1

required:

  - compatible

  - clocks

  - '#clock-cells'

  - select-gpios

additionalProperties: false

examples:

  - |

    #include <dt-bindings/gpio/gpio.h>

    clock {

            compatible = "gpio-mux-clock";

            clocks = <&parentclk1>, <&parentclk2>;

            #clock-cells = <0>;

            select-gpios = <&gpio 1 GPIO_ACTIVE_HIGH>;

    };