On Sat, Mar 01, 2008 at 09:21:22PM +0000, Oliver Ford wrote:
>>> B) Since the kernel apparently has support for the chip, is it fairly 
>>> likely to 'just work', if I compile with the appropriate config?
>>>     
>>
>> No.  You need to have kernel code specific to the device (eg,
>> IPAQ214).
>>
>>   
> I ought to be clear what I mean by 'work'. At the moment all I want to see 
> how far the kernel will get, I'm not really expecting to be able to use any 
> of the features/hardware of the device yet, just to know that the compiled 
> kernel is actually executing on the chip. The best-case at the moment would 
> be to have a simple program executing under init=blah, post-kernel.

I assume you want the output to go to the framebuffer.  You'll need to
at least tell the kernel that much.

You should be able to clone one of the directories:

arch/arm/mach-pxa/<xyz>/

(grab one using a pxafb) and then delete all the stuff you're not
interested in.

>> The 'pxafb' may work.  If your device uses it (instead of, for
>> example, an ati chip) and Marvell didn't make any drastic changes then
>> it will probably work.  Unfortunately, there are no docs, so I don't
>> know if Marvell made any changes.
>>   
> Ok, I'd never thought of them using a different chip, I assumed using the 
> built-in graphics would be usual.
> Is there much hope of getting a serial interface working?

Does your device have a serial port?  If so, I'd definitely try
getting that to work.

I've also debugged kernels on devices that had a uart hooked up to
irda.  It's a bit tricky, but can be useful.

-Kevin
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