linux-kernel - Re: [PATCH v3 1/2] ASoC: qcom: dt-bindings: Add sc7180 machine bindings

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Date:   Fri, 31 Jul 2020 12:32:48 -0600
From:   Rob Herring <robh@...nel.org>
To:     Cheng-Yi Chiang <cychiang@...omium.org>
Cc:     linux-kernel@...r.kernel.org, Mark Brown <broonie@...nel.org>,
        Taniya Das <tdas@...eaurora.org>,
        Rohit kumar <rohitkr@...eaurora.org>,
        Banajit Goswami <bgoswami@...eaurora.org>,
        Patrick Lai <plai@...eaurora.org>,
        Andy Gross <agross@...nel.org>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        Liam Girdwood <lgirdwood@...il.com>,
        Jaroslav Kysela <perex@...ex.cz>,
        Takashi Iwai <tiwai@...e.com>,
        Srini Kandagatla <srinivas.kandagatla@...aro.org>,
        Stephan Gerhold <stephan@...hold.net>, dianders@...omium.org,
        dgreid@...omium.org, tzungbi@...omium.org,
        linux-arm-kernel@...ts.infradead.org,
        linux-arm-msm@...r.kernel.org, devicetree@...r.kernel.org,
        alsa-devel@...a-project.org
Subject: Re: [PATCH v3 1/2] ASoC: qcom: dt-bindings: Add sc7180 machine
 bindings

On Fri, Jul 31, 2020 at 04:40:22PM +0800, Cheng-Yi Chiang wrote:
> Add devicetree bindings documentation file for sc7180 sound card.
> 
> Signed-off-by: Cheng-Yi Chiang <cychiang@...omium.org>
> ---
>  .../bindings/sound/qcom,sc7180.yaml           | 113 ++++++++++++++++++
>  1 file changed, 113 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/sound/qcom,sc7180.yaml
> 
> diff --git a/Documentation/devicetree/bindings/sound/qcom,sc7180.yaml b/Documentation/devicetree/bindings/sound/qcom,sc7180.yaml
> new file mode 100644
> index 000000000000..ce8a5a2d9df9
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/sound/qcom,sc7180.yaml
> @@ -0,0 +1,113 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/sound/qcom,sc7180.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Qualcomm Technologies Inc. SC7180 ASoC sound card driver
> +
> +maintainers:
> +  - Rohit kumar <rohitkr@...eaurora.org>
> +  - Cheng-Yi Chiang <cychiang@...omium.org>
> +
> +description:
> +  This binding describes the SC7180 sound card which uses LPASS for audio.
> +
> +definitions:

Please don't use 'definitions'. Either just duplicate it or you can do 
'patternProperties'.

> +
> +  dai:
> +    type: object
> +    properties:
> +      sound-dai:
> +        maxItems: 1
> +        $ref: /schemas/types.yaml#/definitions/phandle-array
> +        description: phandle array of the codec or CPU DAI

This is a common property. You can assume we have a common schema 
definition for it. IOW, 'sound-dai: true' is enough as it's always a 
single phandle+args.

> +
> +    required:
> +      - sound-dai
> +
> +properties:
> +  compatible:
> +    contains:
> +      const: qcom,sc7180-sndcard
> +
> +  audio-routing:
> +    $ref: /schemas/types.yaml#/definitions/non-unique-string-array
> +    description:
> +      A list of the connections between audio components. Each entry is a
> +      pair of strings, the first being the connection's sink, the second
> +      being the connection's source.
> +
> +  model:
> +    $ref: /schemas/types.yaml#/definitions/string
> +    description: User specified audio sound card name
> +
> +  aux-dev:
> +    $ref: /schemas/types.yaml#/definitions/phandle
> +    description: phandle of the codec for headset detection
> +
> +patternProperties:
> +  "^dai-link(@[0-9]+)?$":
> +    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
> +
> +      cpu:
> +        $ref: "#/definitions/dai"
> +
> +      codec:
> +        $ref: "#/definitions/dai"
> +
> +    required:
> +      - link-name
> +      - cpu
> +      - codec
> +
> +    additionalProperties: false
> +
> +examples:
> +
> +  - |
> +    sound {
> +        compatible = "qcom,sc7180-sndcard";
> +        model = "sc7180-snd-card";
> +
> +        audio-routing =
> +                    "Headphone Jack", "HPOL",
> +                    "Headphone Jack", "HPOR";
> +
> +        aux-dev = <&alc5682>;
> +
> +        #address-cells = <1>;
> +        #size-cells = <0>;
> +
> +        dai-link@0 {
> +            link-name = "MultiMedia0";
> +            cpu {
> +                sound-dai = <&lpass_cpu 0>;
> +            };
> +
> +            codec {
> +                sound-dai = <&alc5682 0>;
> +            };
> +        };
> +
> +        dai-link@1 {
> +            link-name = "MultiMedia1";
> +            cpu {
> +                sound-dai = <&lpass_cpu 1>;
> +            };
> +
> +            codec {
> +                sound-dai = <&max98357a>;
> +            };
> +        };
> +    };
> -- 
> 2.28.0.163.g6104cc2f0b6-goog
>