linux-kernel - Re: [PATCH v2 13/14] ARM: dts: sun6i: hummingbird: Enable internal audio codec

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Date:   Thu, 3 Nov 2016 09:45:43 +0100
From:   Maxime Ripard <maxime.ripard@...e-electrons.com>
To:     Chen-Yu Tsai <wens@...e.org>
Cc:     Liam Girdwood <lgirdwood@...il.com>,
        Mark Brown <broonie@...nel.org>,
        Jaroslav Kysela <perex@...ex.cz>,
        Takashi Iwai <tiwai@...e.com>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        alsa-devel@...a-project.org, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org, devicetree@...r.kernel.org,
        linux-sunxi@...glegroups.com
Subject: Re: [PATCH v2 13/14] ARM: dts: sun6i: hummingbird: Enable internal
 audio codec

On Thu, Nov 03, 2016 at 03:55:55PM +0800, Chen-Yu Tsai wrote:
> The Hummingbird A31 has headset and line in audio jacks and an onboard
> mic routed to the pins for the SoC's internal codec. The line out pins
> are routed to an onboard speaker amp, whose output is available on a
> pin header.
> 
> Signed-off-by: Chen-Yu Tsai <wens@...e.org>
> ---
>  arch/arm/boot/dts/sun6i-a31-hummingbird.dts | 20 ++++++++++++++++++++
>  1 file changed, 20 insertions(+)
> 
> diff --git a/arch/arm/boot/dts/sun6i-a31-hummingbird.dts b/arch/arm/boot/dts/sun6i-a31-hummingbird.dts
> index 9a74637f677f..48c041b75aab 100644
> --- a/arch/arm/boot/dts/sun6i-a31-hummingbird.dts
> +++ b/arch/arm/boot/dts/sun6i-a31-hummingbird.dts
> @@ -69,6 +69,19 @@
>  	};
>  };
>  
> +&codec {
> +	allwinner,audio-routing =
> +		"Headphone", "HP",
> +		"Speaker", "LINEOUT",
> +		"LINEIN", "Line In",
> +		"MIC1", "Mic",
> +		"MIC2", "Headset Mic",
> +		"Mic",	"MBIAS",
> +		"Headset Mic", "HBIAS";
> +	allwinner,pa-gpios = <&pio 7 22 GPIO_ACTIVE_HIGH>; /* PH22 */
> +	status = "okay";
> +};
> +
>  &cpu0 {
>  	cpu-supply = <&reg_dcdc3>;
>  };
> @@ -152,6 +165,13 @@
>  };
>  
>  &pio {
> +	codec_pa_pin: codec_pa_pin@0 {
> +		allwinner,pins = "PH22";
> +		allwinner,function = "gpio_out";
> +		allwinner,drive = <SUN4I_PINCTRL_10_MA>;
> +		allwinner,pull = <SUN4I_PINCTRL_NO_PULL>;
> +	};
> +

This pin group isn't used anywhere. Because of the strict thing in
pinctrl, I'd say it's better to not set it, but then, the pin group is
useless.

Maxime

-- 
Maxime Ripard, Free Electrons
Embedded Linux and Kernel engineering
http://free-electrons.com

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