linux-kernel - [PATCH 3/3] ARM: dts: Define stdout-path property for Spring board

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Date:	Mon, 16 Mar 2015 11:28:30 +0100
From:	Javier Martinez Canillas <javier.martinez@...labora.co.uk>
To:	Kukjin Kim <kgene@...nel.org>
Cc:	Olof Johansson <olof@...om.net>,
	Doug Anderson <dianders@...omium.org>,
	Andreas Faerber <afaerber@...e.de>,
	linux-arm-kernel@...ts.infradead.org,
	linux-samsung-soc@...r.kernel.org, linux-kernel@...r.kernel.org,
	Javier Martinez Canillas <javier.martinez@...labora.co.uk>
Subject: [PATCH 3/3] ARM: dts: Define stdout-path property for Spring board

The kernel can use as the default console a serial port if is defined
as stdout device in the Device Tree.

This allows a board to be booted without the need of having a console
parameter in the kernel command line.

Currently the Spring DTS has bootargs in the /chosen node and this is
kept since users that don't have a serial console on this board might
be using it to have the boot log shown in the display. This will have
more precedence than the stdout-path but it's fine since is only used
when CONFIG_ARM_ATAG_DTB_COMPAT_CMDLINE_EXTEND is enabled.

Signed-off-by: Javier Martinez Canillas <javier.martinez@...labora.co.uk>
---
 arch/arm/boot/dts/exynos5250-spring.dts | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/arm/boot/dts/exynos5250-spring.dts b/arch/arm/boot/dts/exynos5250-spring.dts
index f02775487cd4..b9ec763a5602 100644
--- a/arch/arm/boot/dts/exynos5250-spring.dts
+++ b/arch/arm/boot/dts/exynos5250-spring.dts
@@ -25,6 +25,7 @@

 	chosen {
 		bootargs = "console=tty1";
+		stdout-path = "serial3:115200n8";
 	};

 	gpio-keys {
-- 
2.1.4

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