linux-kernel - [PATCH 5.14 053/100] riscv: dts: microchip: mpfs-icicle: Fix serial console

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Date:   Fri, 24 Sep 2021 14:44:02 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Geert Uytterhoeven <geert@...ux-m68k.org>,
        Bin Meng <bmeng.cn@...il.com>,
        Conor Dooley <conor.dooley@...rochip.com>,
        Palmer Dabbelt <palmerdabbelt@...gle.com>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.14 053/100] riscv: dts: microchip: mpfs-icicle: Fix serial console

From: Geert Uytterhoeven <geert@...ux-m68k.org>

[ Upstream commit cbba17870881cd17bca24673ccb72859431da5bd ]

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>
Reviewed-by: Bin Meng <bmeng.cn@...il.com>
Reviewed-by: Conor Dooley <conor.dooley@...rochip.com>
Signed-off-by: Palmer Dabbelt <palmerdabbelt@...gle.com>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 arch/riscv/boot/dts/microchip/microchip-mpfs-icicle-kit.dts | 6 +++++-
 1 file changed, 5 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 baea7d204639..b254c60589a1 100644
--- a/arch/riscv/boot/dts/microchip/microchip-mpfs-icicle-kit.dts
+++ b/arch/riscv/boot/dts/microchip/microchip-mpfs-icicle-kit.dts
@@ -16,10 +16,14 @@
 
 	aliases {
 		ethernet0 = &emac1;
+		serial0 = &serial0;
+		serial1 = &serial1;
+		serial2 = &serial2;
+		serial3 = &serial3;
 	};
 
 	chosen {
-		stdout-path = &serial0;
+		stdout-path = "serial0:115200n8";
 	};
 
 	cpus {
-- 
2.33.0