Hi,
Am 16.03.2015 um 11:28 schrieb Javier Martinez Canillas:
> The kernel can use as the default console a serial port if is defined
"The kernel can use a serial port as the default console if it's 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
"since it's"
> when CONFIG_ARM_ATAG_DTB_COMPAT_CMDLINE_EXTEND is enabled.
>
> Signed-off-by: Javier Martinez Canillas <javier.martinez@xxxxxxxxxxxxxxx>
> ---
> 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";
Is this a guess or did you verify that against some schematics?
> };
>
> gpio-keys {
Assuming that bootargs still work,
Reviewed-by: Andreas Färber <afaerber@xxxxxxx>
I do wonder why this mechanism could not point to the same location as
bootargs? ("dp-controller"?) The device does not even have screws for
opening it, so accessing the serial port is highly theoretical.
Regards,
Andreas
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