linux-kernel - Re: [PATCH v2 6/7] ASoC: dt-bindings: fsl-sai: Add new property to configure dataline

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Date:   Mon, 27 Jun 2022 17:00:12 -0600
From:   Rob Herring <robh@...nel.org>
To:     Shengjiu Wang <shengjiu.wang@....com>
Cc:     nicoleotsuka@...il.com, Xiubo.Lee@...il.com, festevam@...il.com,
        shengjiu.wang@...il.com, lgirdwood@...il.com, broonie@...nel.org,
        perex@...ex.cz, tiwai@...e.com, alsa-devel@...a-project.org,
        krzk+dt@...nel.org, devicetree@...r.kernel.org,
        linuxppc-dev@...ts.ozlabs.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 6/7] ASoC: dt-bindings: fsl-sai: Add new property to
 configure dataline

On Fri, Jun 17, 2022 at 03:44:36PM +0800, Shengjiu Wang wrote:
> "fsl,dataline" is added to configure the dataline of SAI.
> It has 3 value for each configuration, first one means the type:
> I2S(1) or PDM(2), second one is dataline mask for 'rx', third one is
> dataline mask for 'tx'. for example:
> 
> fsl,dataline = <1 0xff 0xff 2 0xff 0x11>,
> 
> it means I2S type rx mask is 0xff, tx mask is 0xff, PDM type
> rx mask is 0xff, tx mask is 0x11 (dataline 1 and 4 enabled).
> 
> Signed-off-by: Shengjiu Wang <shengjiu.wang@....com>
> ---
>  Documentation/devicetree/bindings/sound/fsl-sai.txt | 8 ++++++++
>  1 file changed, 8 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/sound/fsl-sai.txt b/Documentation/devicetree/bindings/sound/fsl-sai.txt
> index c71c5861d787..4c66e6a1a533 100644
> --- a/Documentation/devicetree/bindings/sound/fsl-sai.txt
> +++ b/Documentation/devicetree/bindings/sound/fsl-sai.txt
> @@ -49,6 +49,14 @@ Required properties:
>  			  receive data by following their own bit clocks and
>  			  frame sync clocks separately.
>  
> +  - fsl,dataline        : configure the dataline. it has 3 value for each configuration
> +                          first one means the type: I2S(1) or PDM(2)
> +                          second one is dataline mask for 'rx'
> +                          third one is dataline mask for 'tx'.
> +                          for example: fsl,dataline = <1 0xff 0xff 2 0xff 0x11>;
> +                          it means I2S type rx mask is 0xff, tx mask is 0xff, PDM type
> +                          rx mask is 0xff, tx mask is 0x11 (dataline 1 and 4 enabled).

You mean 0 and 4 enabled? Or 1 and 4?

How many 3 cell entries can you have?

Rob