ASoC: add simple-audio-mux binding

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

%YAML 1.2

---

$id: http://devicetree.org/schemas/sound/simple-audio-mux.yaml#

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

title: Simple Audio Multiplexer

maintainers:

  - Alexandre Belloni <aleandre.belloni@bootlin.com>

description: |

  Simple audio multiplexers are driven using gpios, allowing to select which of

  their input line is connected to the output line.

properties:

  compatible:

    const: simple-audio-mux

  mux-gpios:

    description: |

      GPIOs used to select the input line.

  sound-name-prefix:

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

    description:

      Used as prefix for sink/source names of the component. Must be a

      unique string among multiple instances of the same component.

required:

  - compatible

  - mux-gpios

additionalProperties: false

examples:

  - |

    mux {

        compatible = "simple-audio-mux";

        mux-gpios = <&gpio 3 0>;

    };