[PATCH 02/15] arm64: dts: mediatek: mt7981b-openwrt-one: Configure UART0 pinmux

[Daniel Golle]

On Thu, Oct 16, 2025 at 12:08:38PM +0200, Sjoerd Simons wrote:
> Add explicit pinctrl configuration for UART0 on the OpenWrt One board,
> 
> Signed-off-by: Sjoerd Simons <sjoerd at collabora.com>
> ---
>  arch/arm64/boot/dts/mediatek/mt7981b-openwrt-one.dts | 11 +++++++++++
>  1 file changed, 11 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/mediatek/mt7981b-openwrt-one.dts b/arch/arm64/boot/dts/mediatek/mt7981b-openwrt-one.dts
> index 968b91f55bb27..f836059d7f475 100644
> --- a/arch/arm64/boot/dts/mediatek/mt7981b-openwrt-one.dts
> +++ b/arch/arm64/boot/dts/mediatek/mt7981b-openwrt-one.dts
> @@ -22,6 +22,17 @@ memory at 40000000 {
>  	};
>  };
>  
> +&pio {
> +	uart0_pins: uart0-pins {
> +		mux {
> +			function = "uart";
> +			groups = "uart0";
> +		};
> +	};
> +};
> +
>  &uart0 {
> +	pinctrl-names = "default";
> +	pinctrl-0 = <&uart0_pins>;
>  	status = "okay";
>  };

As there is only a single possible pinctrl configuration for uart0,
both the pinmux definition as well as the pinctrl properties should go
into mt7981b.dtsi rather than in the board's dts.