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

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Date:   Thu, 22 Nov 2018 16:48:19 +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 <devicetree@...r.kernel.org>,
        Linux-ALSA <alsa-devel@...a-project.org>,
        linux-arm-kernel <linux-arm-kernel@...ts.infradead.org>,
        linux-kernel <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 11:41:57PM +0800, Chen-Yu Tsai wrote:
> On Thu, Nov 22, 2018 at 11:33 PM Maxime Ripard
> <maxime.ripard@...tlin.com> wrote:
> >
> > 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>
> 
> This one (not sun8i-codec-analog) is new for the next release, so there's
> no backward compatibility to consider. Plus none of the device tree changes
> for A64 have been merged.

Ok, that works for me then.

Thanks!
Maxime

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

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