linux-kernel - [PATCH] arm64: dts: arm: Add stdout-path

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Message-Id: <20240730103758.907950-1-Debbie.Martin@arm.com>
Date: Tue, 30 Jul 2024 11:37:58 +0100
From: Debbie Martin <Debbie.Martin@....com>
To: liviu.dudau@....com,
	sudeep.holla@....com,
	lpieralisi@...nel.org,
	robh@...nel.org,
	krzk+dt@...nel.org,
	conor+dt@...nel.org
Cc: linux-arm-kernel@...ts.infradead.org,
	devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH] arm64: dts: arm: Add stdout-path

Add stdout-path to the Arm devicetrees to specify the primary console.
This means that distributions can boot without the need for
platform-specific command line parameters i.e. they can use earlycon
with no parameters and no console argument is needed at all.

Signed-off-by: Debbie Martin <Debbie.Martin@....com>
---
 arch/arm64/boot/dts/arm/foundation-v8.dtsi | 4 +++-
 arch/arm64/boot/dts/arm/fvp-base-revc.dts  | 4 +++-
 arch/arm64/boot/dts/arm/rtsm_ve-aemv8a.dts | 4 +++-
 3 files changed, 9 insertions(+), 3 deletions(-)

diff --git a/arch/arm64/boot/dts/arm/foundation-v8.dtsi b/arch/arm64/boot/dts/arm/foundation-v8.dtsi
index 93f1e7c026b8..083be35495b3 100644
--- a/arch/arm64/boot/dts/arm/foundation-v8.dtsi
+++ b/arch/arm64/boot/dts/arm/foundation-v8.dtsi
@@ -18,7 +18,9 @@ / {
 	#address-cells = <2>;
 	#size-cells = <2>;
 
-	chosen { };
+	chosen {
+		stdout-path = "serial0:115200n8";
+	};
 
 	aliases {
 		serial0 = &v2m_serial0;
diff --git a/arch/arm64/boot/dts/arm/fvp-base-revc.dts b/arch/arm64/boot/dts/arm/fvp-base-revc.dts
index 85f1c15cc65d..19973ab4ea6b 100644
--- a/arch/arm64/boot/dts/arm/fvp-base-revc.dts
+++ b/arch/arm64/boot/dts/arm/fvp-base-revc.dts
@@ -24,7 +24,9 @@ / {
 	#address-cells = <2>;
 	#size-cells = <2>;
 
-	chosen { };
+	chosen {
+		stdout-path = "serial0:115200n8";
+	};
 
 	aliases {
 		serial0 = &v2m_serial0;
diff --git a/arch/arm64/boot/dts/arm/rtsm_ve-aemv8a.dts b/arch/arm64/boot/dts/arm/rtsm_ve-aemv8a.dts
index afdf954206f1..7f7226711d4b 100644
--- a/arch/arm64/boot/dts/arm/rtsm_ve-aemv8a.dts
+++ b/arch/arm64/boot/dts/arm/rtsm_ve-aemv8a.dts
@@ -23,7 +23,9 @@ / {
 	#address-cells = <2>;
 	#size-cells = <2>;
 
-	chosen { };
+	chosen {
+		stdout-path = "serial0:115200n8";
+	};
 
 	aliases {
 		serial0 = &v2m_serial0;
-- 
2.25.1