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Date: Wed, 05 Mar 2008 10:32:33 -0600
From: Scott Wood <scottwood@freescale.com>
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To: benh@kernel.crashing.org
Subject: Re: ARCH=ppc -> ARCH=powerpc : help needed for dts file
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Cc: linuxppc-dev@ozlabs.org, Philippe De Muyter <phdm@macqel.be>
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Benjamin Herrenschmidt wrote:
> So at this stage, that's not enough information. We need to know exactly how
> you have wired things on your board, and somebody from fsl needs to tell
> me how the ExtIrq are routed to the MPIC on that guy.

This part's easy -- the external IRQ is used as the mpic interrupt 
number as-is (internal IRQs start at 16).

> Once that's done, you seem to have grasped the interrupt map... for any
> device or slot, you provide the mapping between idsel/pirq line on one side,
> and mpic interrupt & sense on the other. For PCI, sense is always 1 for an
> mpic so you mostly have to check your actual MPIC source numbers.
> 
>>>From your .dts, I see you've been doing some swizzling of slots using
> interrupts 1...4 ... do that correspond to EXTIRQ 5....8 ?

No, those correspond to the EXT1-4 that are the other side of the #ifdef 
for this board in arch/ppc. :-)

-Scott