linux-kernel - Re: [PATCH 1/6] ASoC: max98088: Document DT bindings

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Message-ID: <54E5EB36.9020007@collabora.co.uk>
Date:	Thu, 19 Feb 2015 14:55:02 +0100
From:	Javier Martinez Canillas <javier.martinez@...labora.co.uk>
To:	Andreas Färber <afaerber@...e.de>,
	Sangbeom Kim <sbkim73@...sung.com>,
	alsa-devel@...a-project.org, linux-samsung-soc@...r.kernel.org
CC:	Liam Girdwood <lgirdwood@...il.com>,
	Mark Brown <broonie@...nel.org>,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
	devicetree@...r.kernel.org,
	Vincent Palatin <vpalatin@...omium.org>,
	Doug Anderson <dianders@...omium.org>,
	Tomasz Figa <tomasz.figa@...il.com>,
	Rob Herring <robh+dt@...nel.org>,
	Pawel Moll <pawel.moll@....com>,
	Mark Rutland <mark.rutland@....com>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	Kumar Gala <galak@...eaurora.org>
Subject: Re: [PATCH 1/6] ASoC: max98088: Document DT bindings

Hello Andreas,

On 02/18/2015 07:25 PM, Andreas Färber wrote:
> Signed-off-by: Andreas Färber <afaerber@...e.de>
> ---
>  Documentation/devicetree/bindings/sound/max98088.txt | 16 ++++++++++++++++
>  1 file changed, 16 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/sound/max98088.txt
> 
> diff --git a/Documentation/devicetree/bindings/sound/max98088.txt b/Documentation/devicetree/bindings/sound/max98088.txt
> new file mode 100644
> index 000000000000..6f8fe85040ee
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/sound/max98088.txt
> @@ -0,0 +1,16 @@
> +MAX98088 audio CODEC
> +
> +This device supports I2C only.
> +
> +Required properties:
> +
> +- compatible : "maxim,max98088" or "maxim,max98089".
> +
> +- reg : The I2C address of the device.
> +
> +Example:
> +
> +max98089: codec@10 {
> +	compatible = "maxim,max98089";
> +	reg = <0x10>;
> +};
>

I see that a master clock (mclk) is added in patch 6/6 but the
max98088 codec driver does handle this clock.

If the SoC XCLKOUT provides the master clock to the max98089
codec in Spring like is the case for the max9809{0,5} codecs
in the Snow and Peach Pit/Pi Chromebooks then you need to do
something along the lines of the following commits:

e3048c3d2be5 ASoC: max98095: Add master clock handling
b10ab7b838bd ASoC: max98090: Add master clock handling

If that's the case you also have to mention in the DT binding
doc that "clocks" and "clock-names" are optional properties
like Documentation/devicetree/bindings/sound/max9809{0,5}.txt.

Best regards,
Javier
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