linux-kernel - Re: [PATCH v9 1/8] ASoC: dt-bindings: sun50i-codec-analog: Add headphone amp regulator supply

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Message-ID: <20181122153241.lzrwhkewg5q4hy2c@flea>
Date:   Thu, 22 Nov 2018 16:32:41 +0100
From:   Maxime Ripard <maxime.ripard@...tlin.com>
To:     Chen-Yu Tsai <wens@...e.org>
Cc:     Mark Brown <broonie@...nel.org>,
        Liam Girdwood <lgirdwood@...il.com>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        devicetree@...r.kernel.org, alsa-devel@...a-project.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        linux-sunxi@...glegroups.com,
        Vasily Khoruzhick <anarsoul@...il.com>
Subject: Re: [PATCH v9 1/8] ASoC: dt-bindings: sun50i-codec-analog: Add
 headphone amp regulator supply

On Thu, Nov 22, 2018 at 06:23:18PM +0800, Chen-Yu Tsai wrote:
> On the Allwinner A64 SoC, the audio codec has a built-in headphone
> amplifier. This amplifier has a power supply separate from the rest of
> the analog audio circuitry.
> 
> Add a regulator supply property to handle this.
> 
> Signed-off-by: Chen-Yu Tsai <wens@...e.org>
> ---
>  Documentation/devicetree/bindings/sound/sun50i-codec-analog.txt | 2 ++
>  1 file changed, 2 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/sound/sun50i-codec-analog.txt b/Documentation/devicetree/bindings/sound/sun50i-codec-analog.txt
> index 4f8ad0e04d20..056a098495cc 100644
> --- a/Documentation/devicetree/bindings/sound/sun50i-codec-analog.txt
> +++ b/Documentation/devicetree/bindings/sound/sun50i-codec-analog.txt
> @@ -4,9 +4,11 @@ Required properties:
>  - compatible: must be one of the following compatibles:
>  		- "allwinner,sun50i-a64-codec-analog"
>  - reg: must contain the registers location and length
> +- cpvdd-supply: Regulator supply for the headphone amplifier

I guess we should make this optional, since even if it's missing, it's
going to create a dummy regulator. and that allows to have backward
compatibility.

For the rest of the series,
Acked-by: Maxime Ripard <maxime.ripard@...tlin.com>

Thanks!
Maxime

-- 
Maxime Ripard, Bootlin
Embedded Linux and Kernel engineering
https://bootlin.com

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