linux-kernel - Re: [PATCH v2 2/3] ASoC: dt-bindings: sama7g5-pdmc: add microchip,startup-delay-us binding

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Message-ID: <20230220225601.GA545317-robh@kernel.org>
Date:   Mon, 20 Feb 2023 16:56:01 -0600
From:   Rob Herring <robh@...nel.org>
To:     Claudiu Beznea <claudiu.beznea@...rochip.com>
Cc:     lgirdwood@...il.com, broonie@...nel.org,
        krzysztof.kozlowski+dt@...aro.org, perex@...ex.cz, tiwai@...e.com,
        nicolas.ferre@...rochip.com, alexandre.belloni@...tlin.com,
        alsa-devel@...a-project.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
Subject: Re: [PATCH v2 2/3] ASoC: dt-bindings: sama7g5-pdmc: add
 microchip,startup-delay-us binding

On Fri, Feb 17, 2023 at 02:41:50PM +0200, Claudiu Beznea wrote:
> Add microchip,startup-delay-us binding to let PDMC users to specify
> startup delay.

The diff tells me all this. Why does this need to be per platform?

> 
> Signed-off-by: Claudiu Beznea <claudiu.beznea@...rochip.com>
> Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
> ---
>  .../devicetree/bindings/sound/microchip,sama7g5-pdmc.yaml   | 6 ++++++
>  1 file changed, 6 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/sound/microchip,sama7g5-pdmc.yaml b/Documentation/devicetree/bindings/sound/microchip,sama7g5-pdmc.yaml
> index c4cf1e5ab84b..9b40268537cb 100644
> --- a/Documentation/devicetree/bindings/sound/microchip,sama7g5-pdmc.yaml
> +++ b/Documentation/devicetree/bindings/sound/microchip,sama7g5-pdmc.yaml
> @@ -67,6 +67,12 @@ properties:
>      maxItems: 4
>      uniqueItems: true
>  
> +  microchip,startup-delay-us:
> +    description: |
> +      Specifies the delay in microseconds that needs to be applied after
> +      enabling the PDMC microphones to avoid unwanted noise due to microphones
> +      not being ready.
> +
>  required:
>    - compatible
>    - reg
> -- 
> 2.34.1
>