Unverified Commit b1f35dfd authored by Maxime Ripard's avatar Maxime Ripard Committed by Mark Brown
Browse files

dt-bindings: sound: sun4i-spdif: Document that the RX channel can be missing 



The H3 and compatibles controllers don't have any reception capabilities,
even though it was never documented as such in the binding before.

Therefore, on those controllers, we don't have the option to set an RX DMA
channel.

This was already done in the DTSI, but the binding itself was never
updated. Let's add a special case in the schemas.

Signed-off-by: default avatarMaxime Ripard <maxime.ripard@bootlin.com>
Reviewed-by: default avatarRob Herring <robh@kernel.org>
Signed-off-by: default avatarMark Brown <broonie@kernel.org>
parent 506c7f9b

Documentation/devicetree/bindings/sound/allwinner,sun4i-a10-spdif.yaml

+28 −10
Original line number Diff line number Diff line
@@ -44,19 +44,11 @@ properties: 
      - const: apb

      - const: spdif



  dmas:

    items:

      - description: RX DMA Channel

      - description: TX DMA Channel



  dma-names:

    items:

      - const: rx

      - const: tx



  # Even though it only applies to subschemas under the conditionals,

  # not listing them here will trigger a warning because of the

  # additionalsProperties set to false.

  dmas: true

  dma-names: true

  resets:

    maxItems: 1
@@ -73,6 +65,32 @@ allOf: 
      required:

        - resets



  - if:

      properties:

        compatible:

          contains:

            const: allwinner,sun8i-h3-spdif



    then:

      properties:

        dmas:

          description: TX DMA Channel



        dma-names:

          const: tx



    else:

      properties:

        dmas:

          items:

            - description: RX DMA Channel

            - description: TX DMA Channel



        dma-names:

          items:

            - const: rx

            - const: tx



required:

  - "#sound-dai-cells"

  - compatible

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