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Commit bd8c9ba3 authored by Florian Fainelli's avatar Florian Fainelli Committed by Rafael J. Wysocki
Browse files

PM / suspend: Export pm_suspend_target_state 



Have the core suspend/resume framework store the system-wide suspend
state (suspend_state_t) we are about to enter, and expose it to drivers
via pm_suspend_target_state in order to retrieve that. The state is
assigned in suspend_devices_and_enter().

This is useful for platform specific drivers that may need to take a
slightly different suspend/resume path based on the system's
suspend/resume state being entered.

Signed-off-by: default avatarFlorian Fainelli <f.fainelli@gmail.com>
Acked-by: default avatarPavel Machek <pavel@ucw.cz>
Signed-off-by: default avatarRafael J. Wysocki <rafael.j.wysocki@intel.com>
parent 5771a8c0

include/linux/suspend.h

+1 −0
Original line number Diff line number Diff line
@@ -427,6 +427,7 @@ 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 suspend_state_t pm_suspend_target_state;



extern bool pm_wakeup_pending(void);

extern void pm_system_wakeup(void);

kernel/power/suspend.c

+5 −0
Original line number Diff line number Diff line
@@ -47,6 +47,8 @@ const char *mem_sleep_states[PM_SUSPEND_MAX]; 


suspend_state_t mem_sleep_current = PM_SUSPEND_FREEZE;

static suspend_state_t mem_sleep_default = PM_SUSPEND_MEM;

suspend_state_t pm_suspend_target_state;

EXPORT_SYMBOL_GPL(pm_suspend_target_state);



unsigned int pm_suspend_global_flags;

EXPORT_SYMBOL_GPL(pm_suspend_global_flags);
@@ -456,6 +458,8 @@ int suspend_devices_and_enter(suspend_state_t state) 
	if (!sleep_state_supported(state))

		return -ENOSYS;



	pm_suspend_target_state = state;



	error = platform_suspend_begin(state);

	if (error)

		goto Close;
@@ -485,6 +489,7 @@ int suspend_devices_and_enter(suspend_state_t state) 


 Close:

	platform_resume_end(state);

	pm_suspend_target_state = PM_SUSPEND_ON;

	return error;



 Recover_platform: