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Commit fbadc58dd3a52c330c8f3926aa93011bf9d91fa0

Authored by ShuoX Liu
Committed by Rafael J. Wysocki
1 parent 43720bd601
Exists in smarc-l5.0.0_1.0.0-ga and in 5 other branches imx_3.10.17_1.0.1_ga, imx_3.10.53_1.1.0_ga, imx_3.14.28_1.0.0_ga, smarc-imx_3.10.53_1.1.0_ga, smarc-imx_3.14.28_1.0.0_ga

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>

Showing 2 changed files with 11 additions and 0 deletions Side-by-side Diff

Documentation/power/runtime_pm.txt
Diff comments   View file @ fbadc58
... ... @@ -426,6 +426,10 @@
426 426 'power.runtime_error' is set or 'power.disable_depth' is greater than
427 427 zero)
428 428  
  429 + bool pm_runtime_active(struct device *dev);
  430 + - return true if the device's runtime PM status is 'active' or its
  431 + 'power.disable_depth' field is not equal to zero, or false otherwise
  432 +
429 433 bool pm_runtime_suspended(struct device *dev);
430 434 - return true if the device's runtime PM status is 'suspended' and its
431 435 'power.disable_depth' field is equal to zero, or false otherwise
include/linux/pm_runtime.h
Diff comments   View file @ fbadc58
... ... @@ -80,6 +80,12 @@
80 80 && !dev->power.disable_depth;
81 81 }
82 82  
  83 +static inline bool pm_runtime_active(struct device *dev)
  84 +{
  85 + return dev->power.runtime_status == RPM_ACTIVE
  86 + || dev->power.disable_depth;
  87 +}
  88 +
83 89 static inline bool pm_runtime_status_suspended(struct device *dev)
84 90 {
85 91 return dev->power.runtime_status == RPM_SUSPENDED;
... ... @@ -132,6 +138,7 @@
132 138 static inline bool device_run_wake(struct device *dev) { return false; }
133 139 static inline void device_set_run_wake(struct device *dev, bool enable) {}
134 140 static inline bool pm_runtime_suspended(struct device *dev) { return false; }
  141 +static inline bool pm_runtime_active(struct device *dev) { return true; }
135 142 static inline bool pm_runtime_status_suspended(struct device *dev) { return false; }
136 143 static inline bool pm_runtime_enabled(struct device *dev) { return false; }
137 144