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@arm.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

On Tue, 30 Jul 2024 11:37:58 +0100, Debbie Martin wrote:
> 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.
>

Applied to sudeep.holla/linux (for-next/juno/updates), thanks!

[1/1] arm64: dts: arm: Add stdout-path
      https://git.kernel.org/sudeep.holla/c/9d4a984a53be
--
Regards,
Sudeep

On Tue, 30 Jul 2024 11:37:58 +0100
Debbie Martin <Debbie.Martin@arm.com> wrote:

> 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.

Looks good to me, and aligns with what the other DTs do:

> Signed-off-by: Debbie Martin <Debbie.Martin@arm.com>

Reviewed-by: Andre Przywara <andre.przywara@arm.com>

Cheers,
Andre

> ---
>  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;