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Commit d1a6faf9 authored by Runmin Wang's avatar Runmin Wang Committed by Kyle Yan
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drivers: GICv3: Enable logging of interrupts that triggered wakeup 



This change enables logging of irq number and name which triggered
wake up of the system from deep sleep. This helps in debugging the
spurious wakeups due to interrupts from various subsystems.

CRs-Fixed: 1033023
Change-Id: Ieeec5959475740e2b0cc75871c1f7e10e1098fa4
Signed-off-by: default avatarRunmin Wang <runminw@codeaurora.org>
parent 4689ca86

drivers/irqchip/irq-gic-common.h

+1 −0
Original line number Diff line number Diff line
@@ -28,6 +28,7 @@ struct gic_quirk { 
};

extern bool from_suspend;

extern struct irq_chip gic_arch_extn;

extern int msm_show_resume_irq_mask;



int gic_configure_irq(unsigned int irq, unsigned int type,

                       void __iomem *base, void (*sync_access)(void));

drivers/irqchip/irq-gic-v3.c

+34 −0
Original line number Diff line number Diff line
@@ -410,11 +410,45 @@ static int gic_suspend(void) 
	return 0;

}



static void gic_show_resume_irq(struct gic_chip_data *gic)

{

	unsigned int i;

	u32 enabled;

	u32 pending[32];

	void __iomem *base = gic_data_dist_base(gic);



	if (!msm_show_resume_irq_mask)

		return;



	for (i = 0; i * 32 < gic->irq_nr; i++) {

		enabled = readl_relaxed(base + GICD_ICENABLER + i * 4);

		pending[i] = readl_relaxed(base + GICD_ISPENDR + i * 4);

		pending[i] &= enabled;

	}



	for (i = find_first_bit((unsigned long *)pending, gic->irq_nr);

	     i < gic->irq_nr;

	     i = find_next_bit((unsigned long *)pending, gic->irq_nr, i+1)) {

		unsigned int irq = irq_find_mapping(gic->domain, i);

		struct irq_desc *desc = irq_to_desc(irq);

		const char *name = "null";



		if (desc == NULL)

			name = "stray irq";

		else if (desc->action && desc->action->name)

			name = desc->action->name;



		pr_warn("%s: %d triggered %s\n", __func__, irq, name);

	}

}



static void gic_resume_one(struct gic_chip_data *gic)

{

	unsigned int i;

	void __iomem *base = gic_data_dist_base(gic);



	gic_show_resume_irq(gic);



	for (i = 0; i * 32 < gic->irq_nr; i++) {

		/* disable all of them */

		writel_relaxed(0xffffffff, base + GICD_ICENABLER + i * 4);