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

Marc Zyngier
2021-02-16T11:47:55Z

On 2021-02-16 09:41, Arnd Bergmann wrote:
> 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.

And every driver would simply fail, because we don't allow sharing of
per-CPU interrupts.

M.
--
Jazz is not dead. It just smells funny...