Re: [RFC PATCH v2 2/5] dt-bindings: sound: Add Apple Macs sound peripherals

[Rob Herring <robh@kernel.org>]

On Mon, Jun 06, 2022 at 09:19:07PM +0200, Martin Povišer wrote:
> Add binding for Apple Silicon Macs' machine-level integration of sound
> peripherals.
> 
> Signed-off-by: Martin Povišer <povik+lin@cutebit.org>
> ---
>  .../bindings/sound/apple,macaudio.yaml        | 157 ++++++++++++++++++
>  1 file changed, 157 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/sound/apple,macaudio.yaml
> 
> diff --git a/Documentation/devicetree/bindings/sound/apple,macaudio.yaml b/Documentation/devicetree/bindings/sound/apple,macaudio.yaml
> new file mode 100644
> index 000000000000..f7c12697beab
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/sound/apple,macaudio.yaml
> @@ -0,0 +1,157 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/sound/apple,macaudio.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Apple Silicon Macs integrated sound peripherals
> +
> +description: |
> +  This binding represents the overall machine-level integration of sound
> +  peripherals on 'Apple Silicon' machines by Apple.
> +
> +maintainers:
> +  - Martin Povišer <povik+lin@cutebit.org>
> +
> +properties:
> +  compatible:
> +    items:
> +      - enum:
> +          - apple,j274-macaudio
> +          - apple,j293-macaudio
> +          - apple,j314-macaudio
> +      - const: apple,macaudio
> +
> +  "#address-cells":
> +    const: 1
> +
> +  "#size-cells":
> +    const: 0
> +
> +  model:
> +    description: |

Don't need '|' if there's no formatting to preserve.

> +      Model name for presentation to users
> +    $ref: /schemas/types.yaml#/definitions/string
> +
> +patternProperties:
> +  "^dai-link(@[0-9a-f]+)?$":
> +    description: |
> +      Node for each sound peripheral such as the speaker array, headphones jack,
> +      or microphone.
> +    type: object

blank line

> +    properties:
> +      reg:
> +        maxItems: 1
> +
> +      link-name:
> +        description: |
> +          Name for the peripheral, expecting 'Speaker' or 'Speakers' if this is
> +          the speaker array.
> +        $ref: /schemas/types.yaml#/definitions/string
> +
> +      cpu:
> +        type: object

           additionalProperties: false

blank line before properties.

> +        properties:
> +          sound-dai:
> +            description: |
> +              DAI list with CPU-side I2S ports involved in this peripheral.
> +            minItems: 1
> +            maxItems: 2

blank line

> +        required:
> +          - sound-dai
> +
> +      codec:
> +        type: object

blank line

> +        properties:
> +          sound-dai:
> +            description: |
> +              DAI list with the CODEC-side DAIs connected to the above CPU-side
> +              DAIs and involved in this sound peripheral.
> +
> +              The list is in left/right order if applicable. If there are more
> +              than one CPU-side DAIs (there can be two), the CODECs must be
> +              listed first those connected to the first CPU, then those
> +              connected to the second.
> +
> +              In addition, on some machines with many speaker codecs, the CODECs
> +              are listed in this fixed order:
> +
> +              J293: Left Front, Left Rear, Right Front, Right Rear
> +              J314: Left Woofer 1, Left Tweeter, Left Woofer 2,
> +                    Right Woofer 1, Right Tweeter, Right Woofer 2
> +            minItems: 1
> +            maxItems: 8

blank line

> +        required:
> +          - sound-dai
> +
> +    required:
> +      - reg
> +      - cpu
> +      - codec
> +
> +    additionalProperties: false

I prefer this to be above 'properties' in the indented cases. 

> +
> +required:
> +  - compatible
> +  - model
> +
> +additionalProperties: false
> +
> +examples:
> +  - |
> +    mca: mca@9b600000 {
> +      compatible = "apple,t6000-mca", "apple,mca";
> +      reg = <0x9b600000 0x10000>,
> +            <0x9b500000 0x20000>;
> +
> +      clocks = <&nco 0>, <&nco 1>, <&nco 2>, <&nco 3>;
> +      power-domains = <&ps_audio_p>, <&ps_mca0>, <&ps_mca1>,
> +                      <&ps_mca2>, <&ps_mca3>;
> +      dmas = <&admac 0>, <&admac 1>, <&admac 2>, <&admac 3>,
> +             <&admac 4>, <&admac 5>, <&admac 6>, <&admac 7>,
> +             <&admac 8>, <&admac 9>, <&admac 10>, <&admac 11>,
> +             <&admac 12>, <&admac 13>, <&admac 14>, <&admac 15>;
> +      dma-names = "tx0a", "rx0a", "tx0b", "rx0b",
> +                  "tx1a", "rx1a", "tx1b", "rx1b",
> +                  "tx2a", "rx2a", "tx2b", "rx2b",
> +                  "tx3a", "rx3a", "tx3b", "rx3b";
> +
> +      #sound-dai-cells = <1>;
> +    };
> +
> +    sound {
> +      compatible = "apple,j314-macaudio", "apple,macaudio";
> +      model = "MacBook Pro J314 integrated audio";
> +
> +      #address-cells = <1>;
> +      #size-cells = <0>;
> +
> +      dai-link@0 {
> +        reg = <0>;
> +        link-name = "Speakers";
> +
> +        cpu {
> +          sound-dai = <&mca 0>, <&mca 1>;
> +        };
> +        codec {
> +          sound-dai = <&speaker_left_woof1>,
> +                      <&speaker_left_tweet>,
> +                      <&speaker_left_woof2>,
> +                      <&speaker_right_woof1>,
> +                      <&speaker_right_tweet>,
> +                      <&speaker_right_woof2>;
> +        };
> +      };
> +
> +      dai-link@1 {
> +        reg = <1>;
> +        link-name = "Headphones Jack";
> +
> +        cpu {
> +          sound-dai = <&mca 2>;
> +        };
> +        codec {
> +          sound-dai = <&jack_codec>;
> +        };
> +      };
> +    };
> -- 
> 2.33.0
> 
>