Which makes me think (again) that we should have an optional 
device_node
pointer in irq_host. I know you said you wanted the irq stuff to be OF
agnostic, but the reality is most of the implementations do have an OF
node. And all of the newer irq_host implementations do, with the
exception of PS3 and celleb - which are special.

How do you suggest to get a reasonable display name out of
the device tree?  The recommended human-readable name for
interrupt controller nodes is "interrupt-controller"...
You cannot use "device_type" either, and using "compatible"
requires selecting one of its string entries, and likely
using a lookup table after that, too.


Segher