linux-kernel - Re: [PATCH v5 13/14] ASoC: add simple-graph-scu-card document

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Message-ID: <20161205224038.obcrqcvsruaajexy@rob-hp-laptop>
Date:   Mon, 5 Dec 2016 16:40:38 -0600
From:   Rob Herring <robh@...nel.org>
To:     Kuninori Morimoto <kuninori.morimoto.gx@...esas.com>
Cc:     Mark Brown <broonie@...nel.org>,
        Linux-ALSA <alsa-devel@...a-project.org>,
        Liam Girdwood <lgirdwood@...il.com>,
        Simon <horms@...ge.net.au>,
        Laurent <laurent.pinchart@...asonboard.com>,
        Guennadi <g.liakhovetski@....de>,
        Grant Likely <grant.likely@...aro.org>,
        Frank Rowand <frowand.list@...il.com>,
        Linux-DT <devicetree@...r.kernel.org>,
        Linux-Kernel <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v5 13/14] ASoC: add simple-graph-scu-card document

On Mon, Nov 28, 2016 at 02:48:37AM +0000, Kuninori Morimoto wrote:
> 
> From: Kuninori Morimoto <kuninori.morimoto.gx@...esas.com>
> 
> Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@...esas.com>
> ---
>  .../bindings/sound/simple-graph-scu-card.txt       | 69 ++++++++++++++++++++++
>  1 file changed, 69 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/sound/simple-graph-scu-card.txt
> 
> diff --git a/Documentation/devicetree/bindings/sound/simple-graph-scu-card.txt b/Documentation/devicetree/bindings/sound/simple-graph-scu-card.txt
> new file mode 100644
> index 0000000..b0e46ba
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/sound/simple-graph-scu-card.txt
> @@ -0,0 +1,69 @@
> +Simple-Graph-SCU-Card:
> +
> +Simple-Graph-SCU-Card specifies audio DAI connections of SoC <-> codec.
> +It is based on common bindings for device graphs.
> +see ${LINUX}/Documentation/devicetree/bindings/graph.txt
> +
> +Basically, Simple-Graph-SCU-Card property is same as Simple-Card / Simple-Graph-Card.
> +see ${LINUX}/Documentation/devicetree/bindings/sound/simple-card.txt
> +    ${LINUX}/Documentation/devicetree/bindings/sound/simple-graph-card.txt
> +
> +Main difference between Simple-Graph-Card and Simple-Graph-SCU-Card is that
> +Simple-Graph-SCU-Card can use multi CPU.

So it can have more that 1 port? At least for the bindings, I think you 
should combine these 2 bindings. Whether the driver should be combined 
is separate question. I imagine you have 2 compatible strings because 
you have 2 drivers, but that isn't really a reason to have 2.

I still have no idea what SCU is.

Rob