linux-kernel - Re: [PATCH v2 1/3] dt-bindings: ASoC: Add TDA7802 amplifier

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Date:   Tue, 30 Jul 2019 13:27:48 +0100
From:   Charles Keepax <ckeepax@...nsource.cirrus.com>
To:     Thomas Preston <thomas.preston@...ethink.co.uk>
CC:     Liam Girdwood <lgirdwood@...il.com>,
        Mark Brown <broonie@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Jaroslav Kysela <perex@...ex.cz>,
        Takashi Iwai <tiwai@...e.com>,
        Jerome Brunet <jbrunet@...libre.com>,
        Srinivas Kandagatla <srinivas.kandagatla@...aro.org>,
        Marco Felsch <m.felsch@...gutronix.de>,
        Paul Cercueil <paul@...pouillou.net>,
        Kirill Marinushkin <kmarinushkin@...dec.tech>,
        Cheng-Yi Chiang <cychiang@...omium.org>,
        Kuninori Morimoto <kuninori.morimoto.gx@...esas.com>,
        Vinod Koul <vkoul@...nel.org>,
        Annaliese McDermond <nh6z@...z.net>,
        <alsa-devel@...a-project.org>, <devicetree@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>, Patrick Glaser <pglaser@...la.com>,
        Rob Duncan <rduncan@...la.com>, Nate Case <ncase@...la.com>
Subject: Re: [PATCH v2 1/3] dt-bindings: ASoC: Add TDA7802 amplifier

On Tue, Jul 30, 2019 at 01:09:35PM +0100, Thomas Preston wrote:
> Signed-off-by: Thomas Preston <thomas.preston@...ethink.co.uk>
> Cc: Patrick Glaser <pglaser@...la.com>
> Cc: Rob Duncan <rduncan@...la.com>
> Cc: Nate Case <ncase@...la.com>
> ---
>  .../devicetree/bindings/sound/tda7802.txt     | 26 +++++++++++++++++++
>  1 file changed, 26 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/sound/tda7802.txt
> 
> diff --git a/Documentation/devicetree/bindings/sound/tda7802.txt b/Documentation/devicetree/bindings/sound/tda7802.txt
> new file mode 100644
> index 000000000000..f80aaf4f1ba0
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/sound/tda7802.txt
> @@ -0,0 +1,26 @@
> +ST TDA7802 audio processor
> +
> +This device supports I2C only.
> +
> +Required properties:
> +
> +- compatible : "st,tda7802"
> +- reg : the I2C address of the device
> +- enable-supply : a regulator spec for the PLLen pin
> +
> +Optional properties:
> +
> +- st,gain-ch13 : gain for channels 1 and 3 (range: 1-4)
> +- st,gain-ch24 : gain for channels 2 and 3 (range: 1-4)

I wouldn't have expected the gains to be available as a device
tree setting.

> +- st,diagnostic-mode-ch13 : diagnotic mode for channels 1 and 3
> +                            values: "Speaker" (default), "Booster"
> +- st,diagnostic-mode-ch24 : diagnotic mode for channels 2 and 4
> +                            values: "Speaker" (default), "Booster"
> +
> +Example:
> +
> +amp: tda7802@6c {
> +	compatible = "st,tda7802";
> +	reg = <0x6c>;
> +	enable-supply = <&amp_enable_reg>;
> +};
> -- 
> 2.21.0
> 

Thanks,
Charles