Re: [PATCH RESEND v1 2/5] drivers: pinctrl: msm: enable PDC interrupt only during suspend

[Lina Iyer]

On Tue, Sep 04 2018 at 16:00 -0600, Stephen Boyd wrote:
> Quoting Lina Iyer (2018-09-04 14:09:34)
> > On Mon, Aug 27 2018 at 14:01 -0600, Stephen Boyd wrote:
> > >
> > >Can't we just configure a different chained IRQ handler with
> > >irq_set_chained_handler_and_data() for each of the GPIO IRQs that are
> > >handled by PDC to be the interrupts provide by the PDC irq controller
> > >that match the GPIOs? And then set their parent irq with
> > >irq_set_parent() for completeness? And also move those GPIOs from the
> > >existing msm_gpio irqchip to a different PDC gpio irqchip that does
> > >nothing besides push irqchip calls up to the PDC irqchip? Then we don't
> > >even have to think about resending anything and we can rely on PDC to do
> > >all the interrupt sensing all the time but still provide the irqs from
> > >the GPIO controller.
> > >
> > Seems like the irqchips need to be in hierarchy for this to work, which
> > is not the case with TLMM and the PDC, currently.
>
> Why? Does something mandate that the chained irq is also the
> hierarchical parent irqchip?
All the _parent() functions like irq_set_wake_parent() etc need
parent_data to be set, which is only set during hierarchy.

-- Lina