Re: [PATCH v2 1/2] arm64: dts: mediatek: alias all enabled serial ports

[AngeloGioacchino Del Regno]

On 7/27/26 09:38, Carlo Caione wrote:
> On most MediaTek boards only serial0 is aliased, so the remaining
> enabled uarts get first-free ttyS line numbers from the 8250 core in
> probe order. When the console uart defers on its clocks another uart can
> win line 0: console=ttyS0 then ends up on the wrong port and the boot
> looks like a hang on the serial console, depending on probe order.
>
> Signed-off-by: Carlo Caione <ccaione@xxxxxxxxxxxx>
> ---
>   arch/arm64/boot/dts/mediatek/mt6795-sony-xperia-m5.dts    | 1 +
>   arch/arm64/boot/dts/mediatek/mt7622-rfb1.dts              | 1 +
>   arch/arm64/boot/dts/mediatek/mt7986a-bananapi-bpi-r3.dts  | 2 ++
>   arch/arm64/boot/dts/mediatek/mt7986a-rfb.dts              | 2 ++
>   arch/arm64/boot/dts/mediatek/mt8183-kukui.dtsi            | 1 +
>   arch/arm64/boot/dts/mediatek/mt8192-asurada-hayato-r1.dts | 4 ++++
>   arch/arm64/boot/dts/mediatek/mt8195-demo.dts              | 1 +
>   arch/arm64/boot/dts/mediatek/mt8365-evk.dts               | 2 ++
>   arch/arm64/boot/dts/mediatek/mt8390-genio-common.dtsi     | 2 ++
>   arch/arm64/boot/dts/mediatek/mt8390-grinn-genio-sbc.dtsi  | 2 ++
>   arch/arm64/boot/dts/mediatek/mt8390-tungsten-smarc.dtsi   | 2 ++
>   arch/arm64/boot/dts/mediatek/mt8395-genio-common.dtsi     | 1 +
>   12 files changed, 21 insertions(+)
>
> diff --git a/arch/arm64/boot/dts/mediatek/mt6795-sony-xperia-m5.dts b/arch/arm64/boot/dts/mediatek/mt6795-sony-xperia-m5.dts
> index 0e086dd487d9..63659e240b1d 100644
> --- a/arch/arm64/boot/dts/mediatek/mt6795-sony-xperia-m5.dts
> +++ b/arch/arm64/boot/dts/mediatek/mt6795-sony-xperia-m5.dts
> @@ -20,6 +20,7 @@ aliases {
>   		mmc2 = &mmc2;
>   		serial0 = &uart0;
>   		serial1 = &uart1;
> +		serial2 = &uart2;
>   	};
>   
>   	backlight_lcd0: backlight {
> diff --git a/arch/arm64/boot/dts/mediatek/mt7622-rfb1.dts b/arch/arm64/boot/dts/mediatek/mt7622-rfb1.dts
> index 8c3e2e2578bc..7bccad118d24 100644
> --- a/arch/arm64/boot/dts/mediatek/mt7622-rfb1.dts
> +++ b/arch/arm64/boot/dts/mediatek/mt7622-rfb1.dts
> @@ -20,6 +20,7 @@ / {
>   
>   	aliases {
>   		serial0 = &uart0;
> +		serial2 = &uart2;

Why is that serial2 and not serial1 = &uart2?

Cheers,
Angelo

>   	};
>   
>   	chosen {