ASoC: dt-bindings: ak4642: switch to yaml base Documentation

AK4642 I2C transmitter

This device supports I2C mode only.

Required properties:

  - compatible : "asahi-kasei,ak4642" or "asahi-kasei,ak4643" or "asahi-kasei,ak4648"

  - reg : The chip select number on the I2C bus

Optional properties:

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

  - clocks :			common clock binding; MCKI clock

  - clock-frequency :		common clock binding; frequency of MCKO

  - clock-output-names :	common clock binding; MCKO clock name

Example 1:

&i2c {

	ak4648: ak4648@12 {

		compatible = "asahi-kasei,ak4642";

		reg = <0x12>;

	};

};

Example 2:

&i2c {

	ak4643: codec@12 {

		compatible = "asahi-kasei,ak4643";

		reg = <0x12>;

		#clock-cells = <0>;

		clocks = <&audio_clock>;

		clock-frequency = <12288000>;

		clock-output-names = "ak4643_mcko";

	};

};

# SPDX-License-Identifier: GPL-2.0

%YAML 1.2

---

$id: http://devicetree.org/schemas/sound/ak4642.yaml#

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

title: AK4642 I2C transmitter Device Tree Bindings

maintainers:

  - Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>

properties:

  compatible:

    enum:

      - asahi-kasei,ak4642

      - asahi-kasei,ak4643

      - asahi-kasei,ak4648

  reg:

    maxItems: 1

  "#clock-cells":

    const: 0

  "#sound-dai-cells":

    const: 0

  clocks:

    maxItems: 1

  clock-frequency:

    description: common clock binding; frequency of MCKO

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

  clock-output-names:

    description: common clock name

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

required:

  - compatible

  - reg

additionalProperties: false

examples:

  - |

    i2c {

        #address-cells = <1>;

        #size-cells = <0>;

        ak4643: codec@12 {

            compatible = "asahi-kasei,ak4643";

            #sound-dai-cells = <0>;

            reg = <0x12>;

            #clock-cells = <0>;

            clocks = <&audio_clock>;

            clock-frequency = <12288000>;

            clock-output-names = "ak4643_mcko";

        };

    };