linux-kernel - Re: [PATCH v1 2/2] dt-bindings: ASoC: simple-card: Add system-clock-id property

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Date:   Sun, 23 Oct 2022 09:08:21 -0400
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     Aidan MacDonald <aidanmacdonald.0x0@...il.com>, broonie@...nel.org,
        lgirdwood@...il.com, robh+dt@...nel.org,
        krzysztof.kozlowski+dt@...aro.org, kuninori.morimoto.gx@...esas.com
Cc:     perex@...ex.cz, tiwai@...e.com, alsa-devel@...a-project.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v1 2/2] dt-bindings: ASoC: simple-card: Add
 system-clock-id property

On 22/10/2022 12:27, Aidan MacDonald wrote:
> This is a new per-DAI property used to specify the clock ID argument
> to snd_soc_dai_set_sysclk().

You did no show the use of this property and here you refer to some
specific Linux driver implementation, so in total this does no look like
 a hardware property.

You also did not explain why do you need it (the most important piece of
commit msg).

> 
> Signed-off-by: Aidan MacDonald <aidanmacdonald.0x0@...il.com>
> ---
>  Documentation/devicetree/bindings/sound/simple-card.yaml | 8 ++++++++
>  1 file changed, 8 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/sound/simple-card.yaml b/Documentation/devicetree/bindings/sound/simple-card.yaml
> index ed19899bc94b..cb7774e235d0 100644
> --- a/Documentation/devicetree/bindings/sound/simple-card.yaml
> +++ b/Documentation/devicetree/bindings/sound/simple-card.yaml
> @@ -57,6 +57,12 @@ definitions:
>        single fixed sampling rate.
>      $ref: /schemas/types.yaml#/definitions/flag
>  
> +  system-clock-id:
> +    description: |
> +      Specify the clock ID used for setting the DAI system clock.


With lack of explanation above, I would say - use common clock framework
to choose a clock...


Best regards,
Krzysztof