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authorMaulik Shah <mkshah@codeaurora.org>2020-09-28 07:32:01 +0300
committerMarc Zyngier <maz@kernel.org>2020-10-06 13:23:41 +0300
commit90428a8eb4947f9c7c905a178f3520dc7e2ee6d2 (patch)
tree171d58fc480ed090807c29cd9bc27e6e5ca24930 /kernel/irq/debugfs.c
parentf41aaca593377a4fe3984459fd4539481263b4cd (diff)
downloadlinux-90428a8eb4947f9c7c905a178f3520dc7e2ee6d2.tar.xz
genirq/PM: Introduce IRQCHIP_ENABLE_WAKEUP_ON_SUSPEND flag
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
Diffstat (limited to 'kernel/irq/debugfs.c')
-rw-r--r--kernel/irq/debugfs.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/kernel/irq/debugfs.c b/kernel/irq/debugfs.c
index b95ff5d5f4bd..b6e10945e8be 100644
--- a/kernel/irq/debugfs.c
+++ b/kernel/irq/debugfs.c
@@ -57,6 +57,7 @@ static const struct irq_bit_descr irqchip_flags[] = {
BIT_MASK_DESCR(IRQCHIP_EOI_THREADED),
BIT_MASK_DESCR(IRQCHIP_SUPPORTS_LEVEL_MSI),
BIT_MASK_DESCR(IRQCHIP_SUPPORTS_NMI),
+ BIT_MASK_DESCR(IRQCHIP_ENABLE_WAKEUP_ON_SUSPEND),
};
static void
@@ -125,6 +126,8 @@ static const struct irq_bit_descr irqdata_states[] = {
BIT_MASK_DESCR(IRQD_DEFAULT_TRIGGER_SET),
BIT_MASK_DESCR(IRQD_HANDLE_ENFORCE_IRQCTX),
+
+ BIT_MASK_DESCR(IRQD_IRQ_ENABLED_ON_SUSPEND),
};
static const struct irq_bit_descr irqdesc_states[] = {