diff mbox

[v4] PM / suspend: Export pm_suspend_target_state

Message ID 20170718001925.25286-1-f.fainelli@gmail.com (mailing list archive)
State New, archived
Headers show

Commit Message

Florian Fainelli July 18, 2017, 12:19 a.m. UTC
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: Florian Fainelli <f.fainelli@gmail.com>
---
Changes in v4:
- clear pm_suspend_target_state in Close label

Changes in v3:

- just export pm_suspend_target_state without a helper function

Changes in v2:

- rename platform_suspend_target_state() -> suspend_target_state()
- directly export the suspend_state_t value and assign it in
  suspend_devices_and_enter()


 include/linux/suspend.h | 1 +
 kernel/power/suspend.c  | 5 +++++
 2 files changed, 6 insertions(+)

Comments

Rafael J. Wysocki July 24, 2017, 8:55 p.m. UTC | #1
On Monday, July 17, 2017 05:19:25 PM Florian Fainelli wrote:
> 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: Florian Fainelli <f.fainelli@gmail.com>
> ---
> Changes in v4:
> - clear pm_suspend_target_state in Close label
> 
> Changes in v3:
> 
> - just export pm_suspend_target_state without a helper function
> 
> Changes in v2:
> 
> - rename platform_suspend_target_state() -> suspend_target_state()
> - directly export the suspend_state_t value and assign it in
>   suspend_devices_and_enter()

Applied, thanks!
diff mbox

Patch

diff --git a/include/linux/suspend.h b/include/linux/suspend.h
index 0b1cf32edfd7..2159f6841768 100644
--- a/include/linux/suspend.h
+++ b/include/linux/suspend.h
@@ -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);
diff --git a/kernel/power/suspend.c b/kernel/power/suspend.c
index 3ecf275d7e44..d0c0b96c2383 100644
--- a/kernel/power/suspend.c
+++ b/kernel/power/suspend.c
@@ -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: