[PATCH] [POWERPC] Xilinx: add compatibility for 'simple-bus'.

[Stephen Neuendorffer]

Is there really much of a chance of that, given the differences with the bootwrappers?
Does anyone care enough about legacy_serial for this to matter?   My impression was that legacy serial was not preferred anyway...

Steve

-----Original Message-----
From: glikely at secretlab.ca on behalf of Grant Likely
Sent: Sat 6/28/2008 1:33 PM
To: Stephen Neuendorffer
Cc: dwg at au1.ibm.com; jwboyer at linux.vnet.ibm.com; linuxppc-dev at ozlabs.org; git
Subject: Re: [PATCH] [POWERPC] Xilinx: add compatibility for 'simple-bus'.
 
On Fri, Jun 6, 2008 at 10:16 AM, Stephen Neuendorffer
<stephen.neuendorffer at xilinx.com> wrote:
>
> legacy_serial identifies a valid ns16550 on a simple-bus, but the
> legacy_serial driver doesn't understand the shift and offset flags
> necessary to get it to work, which results in no console.
>
> I think the easiest solution is to change the Kconfig so that
> PPC_UDBG_16550 is only selected based on !XILINX_VIRTEX.  I've done this
> in my tree, but I've been swamped with other things at the moment, so I
> haven't verified it.

This is an easy solution, but it is not a good one.  Doing so would
break UDBG on other 405 boards when building multiplatform kernels.
It would be better to teach legacy serial about the shift and offset.
Alternately, add code to add_legacy_soc_port() to skip it if the
shift/offset properties are present.

Cheers,
g.

-- 
Grant Likely, B.Sc., P.Eng.
Secret Lab Technologies Ltd.




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