Documentation / devicetree / bindings / sound / imx-audio-card.yaml


Based on kernel version 6.9. Page generated on 2024-05-14 10:02 EST.

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# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
%YAML 1.2
---
$id: http://devicetree.org/schemas/sound/imx-audio-card.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#

title: NXP i.MX audio sound card.

maintainers:
  - Shengjiu Wang <shengjiu.wang@nxp.com>

allOf:
  - $ref: sound-card-common.yaml#

properties:
  compatible:
    enum:
      - fsl,imx-audio-card

patternProperties:
  ".*-dai-link$":
    description:
      Each subnode represents a dai link. Subnodes of each dai links would be
      cpu/codec dais.

    type: object

    properties:
      link-name:
        description: Indicates dai-link name and PCM stream name.
        $ref: /schemas/types.yaml#/definitions/string
        maxItems: 1

      format:
        description: audio format.
        items:
          enum:
            - i2s
            - dsp_b

      dai-tdm-slot-num:
        description: see tdm-slot.txt.
        $ref: /schemas/types.yaml#/definitions/uint32

      dai-tdm-slot-width:
        description: see tdm-slot.txt.
        $ref: /schemas/types.yaml#/definitions/uint32

      cpu:
        description: Holds subnode which indicates cpu dai.
        type: object
        additionalProperties: false
        properties:
          sound-dai:
            maxItems: 1

      codec:
        description: Holds subnode which indicates codec dai.
        type: object
        additionalProperties: false
        properties:
          sound-dai:
            minItems: 1
            maxItems: 2

      fsl,mclk-equal-bclk:
        description: Indicates mclk can be equal to bclk, especially for sai interface
        $ref: /schemas/types.yaml#/definitions/flag

    required:
      - link-name
      - cpu

    additionalProperties: false

required:
  - compatible

unevaluatedProperties: false

examples:
  - |
    sound-ak4458 {
        compatible = "fsl,imx-audio-card";
        model = "ak4458-audio";
        pri-dai-link {
            link-name = "akcodec";
            format = "i2s";
            fsl,mclk-equal-bclk;
            cpu {
                 sound-dai = <&sai1>;
            };
            codec {
                 sound-dai = <&ak4458_1>, <&ak4458_2>;
            };
        };
        fe-dai-link {
            link-name = "HiFi-ASRC-FE";
            format = "i2s";
            cpu {
                sound-dai = <&easrc>;
            };
        };
        be-dai-link {
            link-name = "HiFi-ASRC-BE";
            format = "dsp_b";
            dai-tdm-slot-num = <8>;
            dai-tdm-slot-width = <32>;
            fsl,mclk-equal-bclk;
            cpu {
                sound-dai = <&sai1>;
            };
            codec {
                sound-dai = <&ak4458_1>, <&ak4458_2>;
            };
        };
    };