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| author | ShuoX Liu <shuox.liu@intel.com> | 2013-01-23 21:49:37 +0100 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2013-01-26 00:39:12 +0100 |
| commit | fbadc58dd3a52c330c8f3926aa93011bf9d91fa0 (patch) | |
| tree | 3610166150f5b4cbd6be81f34c6c589f841df0b9 | |
| parent | 43720bd6014327ac454434496cb953edcdb9f8d6 (diff) | |
| download | linux-fbadc58dd3a52c330c8f3926aa93011bf9d91fa0.tar.bz2 | |
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: Yanmin Zhang <yanmin.zhang@intel.com>
Signed-off-by: ShuoX Liu <shuox.liu@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
| -rw-r--r-- | Documentation/power/runtime_pm.txt | 4 | ||||
| -rw-r--r-- | include/linux/pm_runtime.h | 7 |
2 files changed, 11 insertions, 0 deletions
diff --git a/Documentation/power/runtime_pm.txt b/Documentation/power/runtime_pm.txt index 03591a750f99..6c9f5d9aa115 100644 --- a/Documentation/power/runtime_pm.txt +++ b/Documentation/power/runtime_pm.txt @@ -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 diff --git a/include/linux/pm_runtime.h b/include/linux/pm_runtime.h index f271860c78d5..c785c215abfc 100644 --- a/include/linux/pm_runtime.h +++ b/include/linux/pm_runtime.h @@ -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; } |