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

[Allen Martin <amartin@nvidia.com>]

On Thu, Oct 25, 2012 at 03:47:09PM -0700, Joe Hershberger wrote:
> Hi Stephen,
> 
> On Thu, Oct 25, 2012 at 5:45 PM, Stephen Warren <swarren@wwwdotorg.org> wrote:
> > On 10/25/2012 04:36 PM, Joe Hershberger wrote:
> >> Hi Allen,
> >>
> >> On Thu, Oct 25, 2012 at 4:59 PM, Allen Martin <amartin@nvidia.com> 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.
> > ...
> >> Changes to this directly conflict with the environment callback series
> >> I sent out RFC (soon be be a real series).  Can we hold off on this
> >> until that happens?
> >
> > The problem here is that serial output on Tegra simply doesn't work
> > (after some point in boot?) without this patch. It seems better to get
> > everything working before adding new features doesn't it? Otherwise, if
> > the environment callback stuff (or any other change right now) breaks
> > something Tegra-specific, there would be no way to identify which change
> > broke it.
> 
> Fair enough.  However I don't think this patch is the right way to fix it.
> 

Ok, would removing the existing calls to serial_assign() from iomux.c
and cmd_nvedit.c be an ok first step?  They don't appear to do
anything useful right now and that would fix tegra and raspberry pi.

-Allen
-- 
nvpublic