Re: [PATCH v2 14/25] dt-bindings: interrupt-controller: Add DT bindings for apple-aic

Arnd Bergmann
2021-02-16T09:43:31Z

On Mon, Feb 15, 2021 at 1:17 PM Hector Martin <marcan@marcan.st> wrote:
> +
> + The 2nd cell contains the interrupt number.
> + - HW IRQs: interrupt number
> + - FIQs:
> + - 0: physical HV timer
> + - 1: virtual HV timer
> + - 2: physical guest timer
> + - 3: virtual guest timer

I wonder if you could just model the FIQ as a single shared level interrupt
(which is essentially what it is), and have every driver that uses it do a
request_irq() on the same IRQ number.

This would avoid having to come up with a fake binding for it, and simplify
the implementation that then no longer has to peek into each interrupt
source.

Arnd