genirq/PM: Introduce IRQCHIP_ENABLE_WAKEUP_ON_SUSPEND flag

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An interrupt that is disabled/masked but set for wakeup may still need to
be able to wake up the system from sleep states like "suspend to RAM".

To that effect, introduce the IRQCHIP_ENABLE_WAKEUP_ON_SUSPEND flag.
If the irqchip have this flag set, the irq PM code will enable/unmask
the irqs that are marked for wakeup, but that are in a disabled state.

On resume, such irqs will be restored back to their disabled state.

Suggested-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Maulik Shah <mkshah@codeaurora.org>
[maz: commit message fix-up]
Signed-off-by: Marc Zyngier <maz@kernel.org>
Tested-by: Stephen Boyd <swboyd@chromium.org>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Douglas Anderson <dianders@chromium.org>
Link: https://lore.kernel.org/r/1601267524-20199-4-git-send-email-mkshah@codeaurora.org

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Maulik Shah 2020-09-28 10:02:01 +05:30 • committed by Marc Zyngier

parent f41aaca593

commit 90428a8eb4

3 changed files with 63 additions and 23 deletions

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49

include/linux/irq.h

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3

kernel/irq/debugfs.c

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34

kernel/irq/pm.c

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