[PATCH v2 1/1] irqchip: exynos-combiner: Save IRQ enable set on suspend

Sudeep Holla sudeep.holla at arm.com
Mon Jun 15 02:01:47 PDT 2015

On 15/06/15 08:46, Javier Martinez Canillas wrote:

> Sudeep, so we may need something like $subject after all from Doug's
> explanations since the combiner chip state is lost during a S2R. I know
> that it adds more duplicated code (others irqchip drivers do the same)
> and it may not scale well if a chip has many registers but is the best
> solution I could came with.


> If you have a suggestion for a better alternative, I can give a try and
> write the patch. But I think $subject could also land to fix this issue
> since is a very non intrusive change and later can be changed once the
> irqchip core supports this use case.

Agreed. But I would suggest also to add MASK_ON_SUSPEND and set_irq_wake
also and then you can restore iff it's non-zero as irq core will take
care of most of the non-wakeup sources. Because I am planning to push
MASK_ON_SUSPEND to GIC and it will break this combiner if it assumes the
combiner interrupts are always on in GIC. Implement set_irq_wake as
enable_irq_wake (comb_irq_to_GIC).


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