[PATCH] [POWERPC] Xilinx: Boot: Fix 16550 UART initialization

Stephen Neuendorffer stephen.neuendorffer at xilinx.com
Tue Mar 18 07:17:32 EST 2008


Grant,

If you have working platform code using libfdt, can you publish it?

Steve

> -----Original Message-----
> From: linuxppc-dev-bounces+stephen.neuendorffer=xilinx.com at ozlabs.org
[mailto:linuxppc-dev-
> bounces+stephen.neuendorffer=xilinx.com at ozlabs.org] On Behalf Of Grant
Likely
> Sent: Monday, March 17, 2008 1:08 PM
> To: John Linn
> Cc: linuxppc-dev at ozlabs.org
> Subject: Re: [PATCH] [POWERPC] Xilinx: Boot: Fix 16550 UART
initialization
> 
> On Mon, Mar 17, 2008 at 1:57 PM, John Linn <John.Linn at xilinx.com>
wrote:
> > That makes sense.  Since I'm not using a boot loader I didn't
realize
> >  that.
> >
> >  I'm not sure how hard it will be to get the data from the device
tree at
> >  that time.
> 
> You should be good.  It is now possible to read data from the device
> tree at platform_init() time.
> 
> Cheers,
> g.
> 
> >  What about checking to see if it's setup assuming that's possible
by
> >  looking at registers, and then not messing with it if it's already
> >  setup, otherwise do what my patch does.
> 
> Ugh.  The old arch/ppc code used to do this and it was kind of ugly
> and fragile.  I'd rather avoid doing it again.
> 
> Cheers,
> g.
> 
> --
> Grant Likely, B.Sc., P.Eng.
> Secret Lab Technologies Ltd.
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