[PATCH/RFC] powerpc: Add MPC5200 Interrupt Controller support.

[Nicolas DET]

Nicolas DET wrote:
> Benjamin Herrenschmidt wrote:
> 
>> Now, in addition to that, we have another issue I haven't spotted
>> before, but it might be worth considering:
>>
>> Do we actually want the sdma interrupts handled there ? Because if you
>> look closely, the SDMA is basically a cascaded interrupt controller. It
>> hangs of per interrupt 0 :)
> 
> I know. I already spot this point (IRQ as far as I remenber and in 
> private mails) and I got no answer so I assumed it was ok like I did. 
> It's also really simplier and easier to add SDMA has another irq_chip.
> Keep is simple ;-)
> 
>> Thus we could simply remove the code for it from that driver and
>> implement it as as separate controller with a separate interrupt domain.
>> I know you won't like that idea because it means having a different
>> interrupt tree but it's worth having the discussion.
>>
> 
> The device tree won't change anyway...
> 
> I'll submit a new buch of patches pretty soon. Maybe the final version.
> 
> "On y est presque !" ;-)
> 

I attached the new Interrupt Controller patch. I have been very busy 
today. I hope I did not overlook anything.

RFC

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