[PATCH 2/3] [POWERPC] Xilinx: of_serial support for Xilinx uart16550.

[Stephen Neuendorffer]

> -----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
Segher Boessenkool
> Sent: Friday, March 21, 2008 9:46 AM
> To: Sergei Shtylyov
> Cc: linuxppc-dev at ozlabs.org; John Linn
> Subject: Re: [PATCH 2/3] [POWERPC] Xilinx: of_serial support for
Xilinx uart16550.
> 
> >    The proposed use clearly would treat them as generic, since in
the
> > context of the Xilinx UART they're just not needed -- it's known
> > beforehand and most probably fixed how/where the registers are
mapped.
> > There's just no need for such info in the device tree -- unless
you're
> > going to teach the *generic* driver to handle this specific (and
> > possibly others alike) kind of a device.
> 
> I was under the impression that the "xilinx uart" was just a 16550 (or
> so)
> with its registers wired up in a slightly unusual way.  If it's a
> completely
> different device, of course you need a separate binding, and you might
> not
> want reg-shift properties etc. there.

It's a standard 16550, with registers in the standard order, but at
offsets 3,7,11, etc.

Steve