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| author | Vincent Guittot <vincent.guittot@linaro.org> | 2018-12-21 11:33:54 +0100 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2019-01-15 22:47:24 +0100 |
| commit | 8a62ffe2753a845272f4f2100b5fca0b6053ff6f (patch) | |
| tree | 31e2c8eaa9d740462dbe65845269b5db7dc9c027 /drivers/base/power | |
| parent | 1c7fc5cbc33980acd13d668f1c8f0313d6ae9fd8 (diff) | |
| download | linux-8a62ffe2753a845272f4f2100b5fca0b6053ff6f.tar.bz2 | |
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: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Vincent Guittot <vincent.guittot@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'drivers/base/power')
| -rw-r--r-- | drivers/base/power/runtime.c | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/drivers/base/power/runtime.c b/drivers/base/power/runtime.c index 457be03b744d..a453090c9449 100644 --- a/drivers/base/power/runtime.c +++ b/drivers/base/power/runtime.c @@ -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. |