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

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Message-Id: <98082e819007a0f22d7f0f82914b4d84aabdca6d.1626368678.git.geert@linux-m68k.org>
Date:   Thu, 15 Jul 2021 19:05:36 +0200
From:   Geert Uytterhoeven <geert@...ux-m68k.org>
To:     Paul Walmsley <paul.walmsley@...ive.com>,
        Palmer Dabbelt <palmer@...belt.com>,
        Albert Ou <aou@...s.berkeley.edu>,
        Atish Patra <atish.patra@....com>
Cc:     linux-riscv@...ts.infradead.org, linux-kernel@...r.kernel.org,
        Geert Uytterhoeven <geert@...ux-m68k.org>
Subject: [PATCH] riscv: dts: microchip: mpfs-icicle: Fix serial console

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@...ux-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