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Commit fbadc58d authored by ShuoX Liu's avatar ShuoX Liu Committed by Rafael J. Wysocki
Browse files

PM / Runtime: Add new helper function: pm_runtime_active() 



This boolean function simply returns whether or not the runtime
status of the device is 'active'. The typical scenario is driver
calls pm_runtime_get firstly, then check pm_runtime_active in
atomic environment.

Also add entry to Documentation/power/runtime.txt

Signed-off-by: default avatarYanmin Zhang <yanmin.zhang@intel.com>
Signed-off-by: default avatarShuoX Liu <shuox.liu@intel.com>
Signed-off-by: default avatarRafael J. Wysocki <rafael.j.wysocki@intel.com>
parent 43720bd6

Documentation/power/runtime_pm.txt

+4 −0
Original line number Diff line number Diff line
@@ -426,6 +426,10 @@ drivers/base/power/runtime.c and include/linux/pm_runtime.h: 
      'power.runtime_error' is set or 'power.disable_depth' is greater than

      zero)



  bool pm_runtime_active(struct device *dev);

    - return true if the device's runtime PM status is 'active' or its

      'power.disable_depth' field is not equal to zero, or false otherwise



  bool pm_runtime_suspended(struct device *dev);

    - return true if the device's runtime PM status is 'suspended' and its

      'power.disable_depth' field is equal to zero, or false otherwise

include/linux/pm_runtime.h

+7 −0
Original line number Diff line number Diff line
@@ -80,6 +80,12 @@ static inline bool pm_runtime_suspended(struct device *dev) 
		&& !dev->power.disable_depth;

}



static inline bool pm_runtime_active(struct device *dev)

{

	return dev->power.runtime_status == RPM_ACTIVE

		|| dev->power.disable_depth;

}



static inline bool pm_runtime_status_suspended(struct device *dev)

{

	return dev->power.runtime_status == RPM_SUSPENDED;
@@ -132,6 +138,7 @@ static inline void pm_runtime_put_noidle(struct device *dev) {} 
static inline bool device_run_wake(struct device *dev) { return false; }

static inline void device_set_run_wake(struct device *dev, bool enable) {}

static inline bool pm_runtime_suspended(struct device *dev) { return false; }

static inline bool pm_runtime_active(struct device *dev) { return true; }

static inline bool pm_runtime_status_suspended(struct device *dev) { return false; }

static inline bool pm_runtime_enabled(struct device *dev) { return false; }