Re: [RFC PATCH 7/7] irqchip/apple-aic: add SMP support to the Apple AIC driver.

[Marc Zyngier]

On 2021-01-21 12:50, Mohamed Mediouni wrote:
> > On 21 Jan 2021, at 13:44, Arnd Bergmann <arnd@xxxxxxxxxx> wrote:
> >
> > On Wed, Jan 20, 2021 at 2:27 PM Mohamed Mediouni

[...]

> > > +       aic.fast_ipi = of_property_read_bool(node, "fast-ipi");
> >
> > Where is this property documented, and what decides which one to use?
> It’s getting documented in the next patch set.
>
> This property is there to enable support for older iPhone processors
> later on, some of which do not have fast IPI support.
>
> On Apple M1, fast-ipi is always on.

Then please focus on a single implementation. Additional features can
always be merged later once something is up and running.

Also, there sysregs can be detected by matching the MIDR, so I don't
think we need a DT property for that.

Thanks,

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