ASoC: dt-bindings: Add Loongson-1 AC97 Controller

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

%YAML 1.2

---

$id: http://devicetree.org/schemas/sound/loongson,ls1b-ac97.yaml#

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

title: Loongson-1 AC97 Controller

maintainers:

  - Keguang Zhang <keguang.zhang@gmail.com>

description:

  The Loongson-1 AC97 controller supports 2-channel stereo output and input.

  It is paired with the DMA engine to handle playback and capture functions.

allOf:

  - $ref: dai-common.yaml#

properties:

  compatible:

    oneOf:

      - const: loongson,ls1b-ac97

      - items:

          - enum:

              - loongson,ls1a-ac97

              - loongson,ls1c-ac97

          - const: loongson,ls1b-ac97

  reg:

    maxItems: 3

  reg-names:

    items:

      - const: ac97

      - const: audio-tx

      - const: audio-rx

  dmas:

    maxItems: 2

  dma-names:

    items:

      - const: tx

      - const: rx

  '#sound-dai-cells':

    const: 0

required:

  - compatible

  - reg

  - reg-names

  - dmas

  - dma-names

  - '#sound-dai-cells'

unevaluatedProperties: false

examples:

  - |

    audio-controller@1fe74000 {

        compatible = "loongson,ls1b-ac97";

        reg = <0x1fe74000 0x60>, <0x1fe72420 0x4>, <0x1fe74c4c 0x4>;

        reg-names = "ac97", "audio-tx", "audio-rx";

        dmas = <&dma 1>, <&dma 2>;

        dma-names = "tx", "rx";

        #sound-dai-cells = <0>;

    };