Re: [PATCH] ARM: shmobile: alt dts: Drop console= bootargs parameter

[Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>]

Hello.

On 11/04/2014 07:23 AM, Simon Horman wrote:

> Alt is booted from DT, so chosen/stdout-path is
> always used, and we can drop the "console=" parameter from chosen/bootargs.

> This change has a side-effect of changing the console speed from 38400
> to 115200. This is intentional as 115200 is consistently used on
> all other shmobile boards.

    I'd say it's not very practical to change the console's baud rate from 
U-Boot's default (AFAIR changing baud rate in U-Boot didn't work)...

> Cc: Ulrich Hecht <ulrich.hecht+renesas@gmail.com>
> Cc: Geert Uytterhoeven <geert+renesas@glider.be>
> Cc: devicetree@vger.kernel.org
> Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
> ---
>   arch/arm/boot/dts/r8a7794-alt.dts | 2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/arch/arm/boot/dts/r8a7794-alt.dts b/arch/arm/boot/dts/r8a7794-alt.dts
> index 8aec512..f2cf757 100644
> --- a/arch/arm/boot/dts/r8a7794-alt.dts
> +++ b/arch/arm/boot/dts/r8a7794-alt.dts
> @@ -20,7 +20,7 @@
>   	};
>
>   	chosen {
> -		bootargs = "console=ttySC0,38400 ignore_loglevel rw root=/dev/nfs ip=dhcp";
> +		bootargs = "ignore_loglevel rw root=/dev/nfs ip=dhcp";

    Hm, does this even work as intended? I've tried to boot another R8A7794 
based board and I couldn't get any output with alike command line. Booting 
with 'earlyprintk=serial' has shown that tty0 was enabled as a console which 
is not what we wanted.

WBR, Sergei