linux-kernel - Re: [PATCH v6 3/3] arm64: dts: allwinner: a64: enable sound on Pinebook

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Date:   Wed, 14 Nov 2018 21:47:36 -0800
From:   Vasily Khoruzhick <anarsoul@...il.com>
To:     Chen-Yu Tsai <wens@...e.org>
Cc:     Maxime Ripard <maxime.ripard@...tlin.com>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        arm-linux <linux-arm-kernel@...ts.infradead.org>,
        devicetree <devicetree@...r.kernel.org>,
        linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v6 3/3] arm64: dts: allwinner: a64: enable sound on Pinebook

On Wed, Nov 7, 2018 at 11:30 PM Chen-Yu Tsai <wens@...e.org> wrote:
> > +
> > +       speaker_amp: speaker_amp {
> > +               compatible = "simple-audio-amplifier";
> > +               enable-gpios = <&pio 7 7 GPIO_ACTIVE_HIGH>; /* PH7 */
>
> You might want to add a sound-name-prefix property. See
>
>     Documentation/devicetree/bindings/sound/name-prefix.txt
>
> Also this should have a reference to its power supply regulator.

You're right, it should reference its power supply which should be a
fixed regulator controlled via GPIO from AXP803.

Unfortunately there's no AXP803 GPIO support yet and
simple-audio-amplifier doesn't have regulator property.

I have no time (and interest) to work on it in near future, so if
anyone wants to pick it up - feel free to do so.

Regards,
Vasily