[U-Boot] Multiple stdin/out without CONFIG_CONSOLE_MUX?

[Holger Brunck]

Hi Stephen,

On 10/25/2012 01:05 AM, Stephen Warren wrote:
> 
> While looking into a CONFIG_CONSOLE_MUX-related issue, I noticed the
> following:
> 
> include/configs/u8500_href.h:136:	"stdin=serial,usbtty\0"
> include/configs/u8500_href.h:135:	"stdout=serial,usbtty\0"
> include/configs/snowball.h:180:	"stdout=serial,usbtty\0"
> 
> Those all include multiple devices in the stdin/stdout definitions.
> However, those config files don't set CONFIG_CONSOLE_MUX. I assume this
> causes usbtty to be ignored, and only serial used?
> 
> Or perhaps U-Boot even fails to parse the variable at all, since
> CONFIG_SYS_CONSOLE_IS_IN_ENV isn't set on those boards? Actually, there
> are a few more boards with that problem:
> 
>> include/configs/km/keymile-common.h:258:	"stdout=serial\0"						\
>> include/configs/MVBC_P.h:146:	"stdout=serial\0"					\
>> include/configs/MVBLM7.h:460:	"stdout=serial\0"					\
>> include/configs/MVSMR.h:129:	"stdout=serial\0"					\
>> include/configs/sandbox.h:91:					"stdout=serial\0" \
>> include/configs/snowball.h:180:	"stdout=serial,usbtty\0"					\
>> include/configs/u8500_href.h:135:	"stdout=serial,usbtty\0"					\

I actually didn't get the point whats the problem here, but you are right our
boards have stdin,stdout,stderr defined in their environment. It seems to be
unneeded here. Maybe it is caused because we used CONFIG_CONSOLE_MUX in the past
but the relevant code was dropped at some point.

So we can remove these variables from our boards completely. Thanks for pointing
out.

Regards
Holger