linux-kernel - Re: [PATCH 2/2] dt-bindings: mediatek: mt8195: add clock property to sound node

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Date:   Thu, 16 Dec 2021 13:06:40 -0600
From:   Rob Herring <robh@...nel.org>
To:     Trevor Wu <trevor.wu@...iatek.com>
Cc:     broonie@...nel.org, tiwai@...e.com, matthias.bgg@...il.com,
        alsa-devel@...a-project.org, linux-mediatek@...ts.infradead.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        devicetree@...r.kernel.org, jiaxin.yu@...iatek.com,
        shumingf@...ltek.com
Subject: Re: [PATCH 2/2] dt-bindings: mediatek: mt8195: add clock property to
 sound node

On Wed, Dec 15, 2021 at 02:58:35PM +0800, Trevor Wu wrote:
> clocks and clock-names are added to provide MCLK phandle for sound card.
> 
> Signed-off-by: Trevor Wu <trevor.wu@...iatek.com>
> ---
>  .../bindings/sound/mt8195-mt6359-rt1011-rt5682.yaml  | 12 ++++++++++++
>  .../bindings/sound/mt8195-mt6359-rt1019-rt5682.yaml  | 12 ++++++++++++
>  2 files changed, 24 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/sound/mt8195-mt6359-rt1011-rt5682.yaml b/Documentation/devicetree/bindings/sound/mt8195-mt6359-rt1011-rt5682.yaml
> index cf6ad7933e23..b57c856d0cf3 100644
> --- a/Documentation/devicetree/bindings/sound/mt8195-mt6359-rt1011-rt5682.yaml
> +++ b/Documentation/devicetree/bindings/sound/mt8195-mt6359-rt1011-rt5682.yaml
> @@ -32,11 +32,21 @@ properties:
>      $ref: "/schemas/types.yaml#/definitions/phandle"
>      description: The phandle of MT8195 HDMI codec node.
>  
> +  clocks:
> +    items:
> +      - description: phandle and clock specifier for codec MCLK.
> +
> +  clock-names:
> +    items:
> +      - const: i2so1_mclk
> +
>  additionalProperties: false
>  
>  required:
>    - compatible
>    - mediatek,platform
> +  - clocks
> +  - clock-names
>  
>  examples:
>    - |
> @@ -44,6 +54,8 @@ examples:
>      sound: mt8195-sound {
>          compatible = "mediatek,mt8195_mt6359_rt1011_rt5682";
>          mediatek,platform = <&afe>;
> +        clocks = <&topckgen 235>; //CLK_TOP_APLL12_DIV2
> +        clock-names = "i2so1_mclk";
>          pinctrl-names = "default";
>          pinctrl-0 = <&aud_pins_default>;
>      };
> diff --git a/Documentation/devicetree/bindings/sound/mt8195-mt6359-rt1019-rt5682.yaml b/Documentation/devicetree/bindings/sound/mt8195-mt6359-rt1019-rt5682.yaml
> index 8f177e02ad35..e4720f76f66b 100644
> --- a/Documentation/devicetree/bindings/sound/mt8195-mt6359-rt1019-rt5682.yaml
> +++ b/Documentation/devicetree/bindings/sound/mt8195-mt6359-rt1019-rt5682.yaml
> @@ -42,11 +42,21 @@ properties:
>        A list of the desired dai-links in the sound card. Each entry is a
>        name defined in the machine driver.
>  
> +  clocks:
> +    items:
> +      - description: phandle and clock specifier for codec MCLK.
> +
> +  clock-names:
> +    items:
> +      - const: i2so1_mclk
> +
>  additionalProperties: false
>  
>  required:
>    - compatible
>    - mediatek,platform
> +  - clocks
> +  - clock-names
>  
>  examples:
>    - |
> @@ -54,6 +64,8 @@ examples:
>      sound: mt8195-sound {
>          compatible = "mediatek,mt8195_mt6359_rt1019_rt5682";
>          mediatek,platform = <&afe>;
> +        clocks = <&topckgen 235>; //CLK_TOP_APLL12_DIV2
> +        clock-names = "i2so1_mclk";

Being a virtual node, how does it have clocks? This belongs in the h/w 
device that consumes the clock.

>          pinctrl-names = "default";
>          pinctrl-0 = <&aud_pins_default>;
>      };
> -- 
> 2.18.0
> 
>