Commit 8a62ffe2 authored by Vincent Guittot's avatar Vincent Guittot Committed by Rafael J. Wysocki
Browse files

PM-runtime: Add new interface to get accounted time 



Some drivers (like i915/drm) needs to get the accounted suspended time.
pm_runtime_suspended_time() will return the suspended accounted time
in ns unit.

Reviewed-by: default avatarUlf Hansson <ulf.hansson@linaro.org>
Signed-off-by: default avatarVincent Guittot <vincent.guittot@linaro.org>
Signed-off-by: default avatarRafael J. Wysocki <rafael.j.wysocki@intel.com>
parent 1c7fc5cb

drivers/base/power/runtime.c

+15 −0
Original line number Diff line number Diff line
@@ -88,6 +88,21 @@ static void __update_runtime_status(struct device *dev, enum rpm_status status) 
	dev->power.runtime_status = status;

}



u64 pm_runtime_suspended_time(struct device *dev)

{

	unsigned long flags, time;



	spin_lock_irqsave(&dev->power.lock, flags);



	update_pm_runtime_accounting(dev);

	time = dev->power.suspended_jiffies;



	spin_unlock_irqrestore(&dev->power.lock, flags);



	return jiffies_to_nsecs(time);

}

EXPORT_SYMBOL_GPL(pm_runtime_suspended_time);



/**

 * pm_runtime_deactivate_timer - Deactivate given device's suspend timer.

 * @dev: Device to handle.

include/linux/pm_runtime.h

+2 −0
Original line number Diff line number Diff line
@@ -113,6 +113,8 @@ static inline bool pm_runtime_is_irq_safe(struct device *dev) 
	return dev->power.irq_safe;

}



extern u64 pm_runtime_suspended_time(struct device *dev);



#else /* !CONFIG_PM */



static inline bool queue_pm_work(struct work_struct *work) { return false; }

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