[U-Boot] [PATCH] serial: add environment control for SERIAL_MULTI

[Allen Martin <amartin@nvidia.com>]

On Thu, Oct 25, 2012 at 03:46:01PM -0700, Joe Hershberger wrote:
> Hi Stephen,
> 
> On Thu, Oct 25, 2012 at 5:43 PM, Stephen Warren <swarren@wwwdotorg.org> wrote:
> > On 10/25/2012 03:59 PM, Allen Martin wrote:
> >> Add a new special environment variable "serial" that allows selection
> >> of serial device when CONFIG_SERIAL_MULTI is defined.  This replaces
> >> the existing calls to serial_assign() from cmd_nvedit.c and iomux.c
> >> that were not doing anything.
> >
> > So I think this requires (for example) the following environment variables:
> >
> > stdout=serial
> > serial=eserial0
> >
> > Is it possible to allow the following instead:
> >
> > stdout=eserial0
> 
> This is precisely what the patch I had pre-Marek serial did.

In your patch would "stdout=serial" still work for case where there is
only one serial port?  I think it's important to try to preserve that
to no be too disruptive.

> 
> > That way, one could presumably set:
> >
> > stdout=eserial0,eserial3
> 
> Though it didn't allow this.
> 

Shouldn't that be (nearly) transparent through iomux?

-Allen
-- 
nvpublic