Irq domain for legacy interrupts

[Arnd Bergmann]

On Wednesday 07 October 2015 14:53:03 bharat kumar gogada wrote:
> why do we need a irq domain for legacy interrupts ?

You need an irq domain if you want to refer to the interrupts from
DT, otherwise you have no way to describe them.

> Do we need any specific
> parameter in device tree other that interrupt-map, interrupt-map-mask, for
> handling with irq domain ?

no.

> when will the .map method in struct irq_domain_ops get invoked for legacy
> interrupts ?

when the interrupt gets mapped ;-)

This should happen whenever the first PCIe device starts using non-MSI
interrupts.

	Arnd