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Commit fdca78b5 authored by Jeevan Shriram's avatar Jeevan Shriram
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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: 964228
Change-Id: Ifd03fcdcfc9afd3ae96a6942293c81a872cc0df6
Signed-off-by: default avatarJeevan Shriram <jshriram@codeaurora.org>
parent 184e2ced

drivers/irqchip/irq-gic-common.h

+1 −0
Original line number Diff line number Diff line
@@ -22,6 +22,7 @@ 


extern bool from_suspend;

extern struct irq_chip gic_arch_extn;

extern int msm_show_resume_irq_mask;



void 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
@@ -355,11 +355,45 @@ 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);