Re: [PATCH 2/2] gpio: sch: Add interrupt support

[Mika Westerberg <mika.westerberg@xxxxxxxxxxxxxxx>]

On Wed, Apr 24, 2019 at 10:12:42AM +0200, Jan Kiszka wrote:
> On 24.04.19 09:58, Mika Westerberg wrote:
> > +Rafael and linux-acpi.
> > 
> > On Thu, Apr 18, 2019 at 11:23:49AM +0200, Jan Kiszka wrote:
> > > From: Jan Kiszka <jan.kiszka@xxxxxxxxxxx>
> > > 
> > > Validated on the Quark platform, this adds interrupt support on rising
> > > and/or falling edges.
> > 
> > The irqchip parts look good to me but but the ACPI SCI handling seems
> > weird. This is typically handled by ACPI core based on the values read
> > from FADT ACPI table. What does it contain on this Quark platform?
> 
> There is no FADT on the original Quark firmware, nor did we add one. As we
> are talking about existing devices, possibly not only Quarks, I was going
> down the ACPI-independent way to hook into the interrupt. But I'm open to
> learn about better alternatives.

Hmm, if it does not have FADT table why would you need SCI then? Is this
implementing some real use case?