[PATCH] riscv: dts: microchip: mpfs-icicle: Fix serial console

[PATCH] riscv: dts: microchip: mpfs-icicle: Fix serial console

[Geert Uytterhoeven]

Currently, nothing is output on the serial console, unless
"console=ttyS0,115200n8" or "earlycon" are appended to the kernel
command line.  Enable automatic console selection using
chosen/stdout-path by adding a proper alias, and configure the expected
serial rate.

While at it, add aliases for the other three serial ports, which are
provided on the same micro-USB connector as the first one.

Fixes: 0fa6107eca4186ad ("RISC-V: Initial DTS for Microchip ICICLE board")
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
---
 .../boot/dts/microchip/microchip-mpfs-icicle-kit.dts     | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/arch/riscv/boot/dts/microchip/microchip-mpfs-icicle-kit.dts b/arch/riscv/boot/dts/microchip/microchip-mpfs-icicle-kit.dts
index ec79944065c98ef2..d75ea11ed043c1f0 100644
--- a/arch/riscv/boot/dts/microchip/microchip-mpfs-icicle-kit.dts
+++ b/arch/riscv/boot/dts/microchip/microchip-mpfs-icicle-kit.dts
@@ -14,8 +14,15 @@ / {
 	model = "Microchip PolarFire-SoC Icicle Kit";
 	compatible = "microchip,mpfs-icicle-kit";
 
+	aliases {
+		serial0 = &serial0;
+		serial1 = &serial1;
+		serial2 = &serial2;
+		serial3 = &serial3;
+	};
+
 	chosen {
-		stdout-path = &serial0;
+		stdout-path = "serial0:115200n8";
 	};
 
 	cpus {
-- 
2.25.1

Re: [PATCH] riscv: dts: microchip: mpfs-icicle: Fix serial console

[Bin Meng]

On Fri, Jul 16, 2021 at 1:26 AM Geert Uytterhoeven <geert@linux-m68k.org> wrote:
>
> Currently, nothing is output on the serial console, unless
> "console=ttyS0,115200n8" or "earlycon" are appended to the kernel
> command line.  Enable automatic console selection using
> chosen/stdout-path by adding a proper alias, and configure the expected
> serial rate.
>
> While at it, add aliases for the other three serial ports, which are
> provided on the same micro-USB connector as the first one.
>
> Fixes: 0fa6107eca4186ad ("RISC-V: Initial DTS for Microchip ICICLE board")
> Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
> ---
>  .../boot/dts/microchip/microchip-mpfs-icicle-kit.dts     | 9 ++++++++-
>  1 file changed, 8 insertions(+), 1 deletion(-)
>
> diff --git a/arch/riscv/boot/dts/microchip/microchip-mpfs-icicle-kit.dts b/arch/riscv/boot/dts/microchip/microchip-mpfs-icicle-kit.dts
> index ec79944065c98ef2..d75ea11ed043c1f0 100644
> --- a/arch/riscv/boot/dts/microchip/microchip-mpfs-icicle-kit.dts
> +++ b/arch/riscv/boot/dts/microchip/microchip-mpfs-icicle-kit.dts
> @@ -14,8 +14,15 @@ / {
>         model = "Microchip PolarFire-SoC Icicle Kit";
>         compatible = "microchip,mpfs-icicle-kit";
>
> +       aliases {
> +               serial0 = &serial0;
> +               serial1 = &serial1;
> +               serial2 = &serial2;
> +               serial3 = &serial3;
> +       };
> +
>         chosen {
> -               stdout-path = &serial0;
> +               stdout-path = "serial0:115200n8";
>         };
>
>         cpus {
> --

If possible, please rebase this patch on top of
https://patchwork.kernel.org/project/linux-riscv/patch/20210702014319.1265766-2-bmeng.cn@gmail.com/

Reviewed-by: Bin Meng <bmeng.cn@gmail.com>