Uart set up in PBL

[Barbier, Renaud]

> > Would it possible from the PBL to read the "baudrate" variable from the
> environment?
> 
> Normally, you would want to avoid doing anything, but the
> bare minimum from PBL. Does the baudrate device parameter
> work for you?
> 
[Barbier, Renaud] 
Just to give you a bit more context. In our platform ARM (all non-pbl) or PPC, we add a call to do a PBIT memory test before starting barebox. The uart is initialized just before that at a fixed baud rate of  9600 bauds. Now we have a requirement to support more than one baud rate configurable by the user. And our next ARM based board is going to have a PBL.

Are you saying that from the PBL, I can do something like baud=getenv("baudrate") to get the environment variable value. This would require to have /dev/env0 instantiated, would not it?
Does not that require to have the environment init code (fs support and all) be compiled as part of the PBL (lwl-y +=....).
My environment variables are in QSPI, so I would think I could parse the environment variable without the whole barebox support instead.
If not possible then I think we can find some other way to retrieve the baud rate.

Cheers.


> Cheers,
> Ahmad
> 
> >
> > Cheers,
> > Renaud
> >
> >
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