PM / sleep: Report interrupt that caused system wakeup (a6f5f0dd) · Commits · 戴 / test

Documentation/ABI/testing/sysfs-power

+12 −0

Original line number	Diff line number	Diff line
		@@ -256,3 +256,15 @@ Description:
		Writing a "1" enables this printing while writing a "0"
		disables it. The default value is "0". Reading from this file
		will display the current value.

		What: /sys/power/pm_wakeup_irq
		Date: April 2015
		Contact: Alexandra Yates <alexandra.yates@linux.intel.org>
		Description:
		The /sys/power/pm_wakeup_irq file reports to user space the IRQ
		number of the first wakeup interrupt (that is, the first
		interrupt from an IRQ line armed for system wakeup) seen by the
		kernel during the most recent system suspend/resume cycle.

		This output is useful for system wakeup diagnostics of spurious
		wakeup interrupts.

+12 −0

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		@@ -25,6 +25,9 @@
		*/
		bool events_check_enabled __read_mostly;

		/* First wakeup IRQ seen by the kernel in the last cycle. */
		unsigned int pm_wakeup_irq __read_mostly;

		/* If set and the system is suspending, terminate the suspend. */
		static bool pm_abort_suspend __read_mostly;

		@@ -868,6 +871,15 @@ EXPORT_SYMBOL_GPL(pm_system_wakeup);
		void pm_wakeup_clear(void)
		{
		pm_abort_suspend = false;
		pm_wakeup_irq = 0;
		}

		void pm_system_irq_wakeup(unsigned int irq_number)
		{
		if (pm_wakeup_irq == 0) {
		pm_wakeup_irq = irq_number;
		pm_system_wakeup();
		}
		}

		/**

+3 −0

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		@@ -387,10 +387,12 @@ extern int unregister_pm_notifier(struct notifier_block *nb);

		/* drivers/base/power/wakeup.c */
		extern bool events_check_enabled;
		extern unsigned int pm_wakeup_irq;

		extern bool pm_wakeup_pending(void);
		extern void pm_system_wakeup(void);
		extern void pm_wakeup_clear(void);
		extern void pm_system_irq_wakeup(unsigned int irq_number);
		extern bool pm_get_wakeup_count(unsigned int *count, bool block);
		extern bool pm_save_wakeup_count(unsigned int count);
		extern void pm_wakep_autosleep_enabled(bool set);
		@@ -440,6 +442,7 @@ static inline int unregister_pm_notifier(struct notifier_block *nb)
		static inline bool pm_wakeup_pending(void) { return false; }
		static inline void pm_system_wakeup(void) {}
		static inline void pm_wakeup_clear(void) {}
		static inline void pm_system_irq_wakeup(unsigned int irq_number) {}

		static inline void lock_system_sleep(void) {}
		static inline void unlock_system_sleep(void) {}

+1 −1

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		@@ -21,7 +21,7 @@ bool irq_pm_check_wakeup(struct irq_desc *desc)
		desc->istate \|= IRQS_SUSPENDED \| IRQS_PENDING;
		desc->depth++;
		irq_disable(desc);
		pm_system_wakeup();
		pm_system_irq_wakeup(irq_desc_get_irq(desc));
		return true;
		}
		return false;

+17 −0

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		@@ -272,6 +272,22 @@ static inline void pm_print_times_init(void)
		{
		pm_print_times_enabled = !!initcall_debug;
		}

		static ssize_t pm_wakeup_irq_show(struct kobject *kobj,
		struct kobj_attribute *attr,
		char *buf)
		{
		return pm_wakeup_irq ? sprintf(buf, "%u\n", pm_wakeup_irq) : -ENODATA;
		}

		static ssize_t pm_wakeup_irq_store(struct kobject *kobj,
		struct kobj_attribute *attr,
		const char *buf, size_t n)
		{
		return -EINVAL;
		}
		power_attr(pm_wakeup_irq);

		#else /* !CONFIG_PM_SLEEP_DEBUG */
		static inline void pm_print_times_init(void) {}
		#endif /* CONFIG_PM_SLEEP_DEBUG */
		@@ -604,6 +620,7 @@ static struct attribute * g[] = {
		#endif
		#ifdef CONFIG_PM_SLEEP_DEBUG
		&pm_print_times_attr.attr,
		&pm_wakeup_irq_attr.attr,
		#endif
		#endif
		#ifdef CONFIG_FREEZER