linux-kernel - Re: [PATCH 08/10] ASoC: dt-bindings: Document fcomb

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Message-ID: <20190724232209.GC6859@Asurada-Nvidia.nvidia.com>
Date:   Wed, 24 Jul 2019 16:22:09 -0700
From:   Nicolin Chen <nicoleotsuka@...il.com>
To:     Daniel Baluta <daniel.baluta@....com>
Cc:     broonie@...nel.org, festevam@...il.com, perex@...ex.cz,
        tiwai@...e.com, Xiubo.Lee@...il.com, timur@...nel.org,
        alsa-devel@...a-project.org, linuxppc-dev@...ts.ozlabs.org,
        linux-kernel@...r.kernel.org, linux-imx@....com,
        shengjiu.wang@....com, angus@...ea.ca, kernel@...gutronix.de,
        l.stach@...gutronix.de, viorel.suman@....com
Subject: Re: [PATCH 08/10] ASoC: dt-bindings: Document fcomb_mode property

On Mon, Jul 22, 2019 at 03:48:31PM +0300, Daniel Baluta wrote:
> This allows combining multiple-data-line FIFOs into a
> single-data-line FIFO.
> 
> Signed-off-by: Daniel Baluta <daniel.baluta@....com>
> ---
>  Documentation/devicetree/bindings/sound/fsl-sai.txt | 4 ++++

This should be sent to devicetree mail-list also.

>  1 file changed, 4 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/sound/fsl-sai.txt b/Documentation/devicetree/bindings/sound/fsl-sai.txt
> index 59f4d965a5fb..ca27afd840ba 100644
> --- a/Documentation/devicetree/bindings/sound/fsl-sai.txt
> +++ b/Documentation/devicetree/bindings/sound/fsl-sai.txt
> @@ -54,6 +54,10 @@ Optional properties:
>  			  represents first data line, bit 1 represents second
>  			  data line and so on. Data line is enabled if
>  			  corresponding bit is set to 1.
> +  - fsl,fcomb_mode	: list of two integers (first for RX, second for TX)
> +			  representing FIFO combine mode. Possible values for
> +			  combined mode are: 0 - disabled, 1 - Rx/Tx from shift
> +			  registers, 2 - Rx/Tx by software, 3 - both.

Looks like a software configuration to me, instead of a device
property. Is this configurable by user case, or hard-coded by
SoC/hardware design?