[Cbe-oss-dev] [RFC/PATCH] adding support for direct MBX interrupt on Axon based platform.

[Benjamin Herrenschmidt]

On Sun, 2007-05-20 at 09:41 +0200, Jean-Christophe Dubois wrote:
> For now I have to do without OF tree for the direct MBX. I'll talk to IBM to 
> check if they would add it. 
> 
> However, theoretically this interrupt should really be attached to the mailbox 
> node. But the mailbox node already has #interrupt-cells and interrupts 
> properties pointing to the MPIC somehow ... What is the theory to have the 
> same device handled by 2 distinct "interrupt controllers" (MPIC and IIC)? 

It's a not-completely solved issue... it can be dealt with by
interposing an interrupt nexus (interrupt-map) at some level.

In the meantime, then, keep a simple quirk just for changing the class
in Axon and build up an iic interrupt number the way I explained.

That is for a CAB board with Axon on IOIF 0 and only one node, it should
be something like 0x10. You can then map that off the iic (which is the
default PIC afaik on cell).

Ben