Subject: [linux-sunxi][PATCH] ARM: dts: sun8i-h3: orange-pi-2: Enable audio codec

From: [email-masked] (Rask Ingemann Lambertsen)
Date: Mon, 20 Feb 2017 22:57:12 +0100

On Mon, Feb 20, 2017 at 05:20:52PM +0100, codekipper at gmail.com wrote:
> From: Marcus Cooper <[email-masked]>
> 
> The Orange Pi 2 routes the LINEOUT pins through a SGM8900 PA which
> needs to be enabled. The onboard microphone is routed to MIC1, with
> MBIAS providing power.
> 
> Signed-off-by: Marcus Cooper <[email-masked]>
> ---
>  arch/arm/boot/dts/sun8i-h3-orangepi-2.dts | 15 +++++++++++++++
>  1 file changed, 15 insertions(+)
> 
> diff --git a/arch/arm/boot/dts/sun8i-h3-orangepi-2.dts b/arch/arm/boot/dts/sun8i-h3-orangepi-2.dts
> index 047e9e1c6093..b0d2b99990cc 100644
> --- a/arch/arm/boot/dts/sun8i-h3-orangepi-2.dts
> +++ b/arch/arm/boot/dts/sun8i-h3-orangepi-2.dts
> @@ -105,6 +105,16 @@
>  	};
>  };
>  
> +&codec {
> +	pinctrl-0 = <&codec_pa_pin>;
> +	allwinner,pa-gpios = <&pio 0 16 GPIO_ACTIVE_HIGH>; /* PA16 */
> +	allwinner,audio-routing =
> +		"Speaker", "LINEOUT",
> +		"MIC1", "Mic",
> +		"Mic",  "MBIAS";
> +	status = "okay";
> +};
> +
>  &ehci1 {
>  	status = "okay";
>  };
> @@ -144,6 +154,11 @@
>  };
>  
>  &pio {
> +	codec_pa_pin: codec_pa_pin at 0 {
> +		pins = "PA16";
> +		function = "gpio_out";
> +	};
> +

There should not be underscores in node names. See e.g.:
https://www.mail-archive.com/linux-kernel%40vger.kernel.org/msg1122967.html
https://www.mail-archive.com/linux-kernel%40vger.kernel.org/msg1145633.html
https://www.mail-archive.com/netdev%40vger.kernel.org/msg90319.html

Pinmux nodes for GPIO usage are considered unnecessary or even harmful
these days, so you should just drop the node in this case (as well as the
reference to it). As a bonus, you avoid a duplicate definition.

-- 
Rask Ingemann Lambertsen