2 files changed, 53 insertions, 0 deletions

diff --git a/include/linux/pm.h b/include/linux/pm.h
index abd81ffaba3c..40f3f45702ba 100644
--- a/include/linux/pm.h
+++ b/include/linux/pm.h
@@ -444,6 +444,9 @@ enum rpm_status {
  *
  * RPM_REQ_SUSPEND      Run the device bus type's ->runtime_suspend() callback
  *
+ * RPM_REQ_AUTOSUSPEND  Same as RPM_REQ_SUSPEND, but not until the device has
+ *                      been inactive for as long as power.autosuspend_delay
+ *
  * RPM_REQ_RESUME       Run the device bus type's ->runtime_resume() callback
  */
 
@@ -451,6 +454,7 @@ enum rpm_request {
         RPM_REQ_NONE = 0,
         RPM_REQ_IDLE,
         RPM_REQ_SUSPEND,
+        RPM_REQ_AUTOSUSPEND,
         RPM_REQ_RESUME,
 };
 
@@ -482,9 +486,13 @@ struct dev_pm_info {
         unsigned int            run_wake:1;
         unsigned int            runtime_auto:1;
         unsigned int            no_callbacks:1;
+        unsigned int            use_autosuspend:1;
+        unsigned int            timer_autosuspends:1;
         enum rpm_request        request;
         enum rpm_status         runtime_status;
         int                     runtime_error;
+        int                     autosuspend_delay;
+        unsigned long           last_busy;
         unsigned long           active_jiffies;
         unsigned long           suspended_jiffies;
         unsigned long           accounting_timestamp;
diff --git a/include/linux/pm_runtime.h b/include/linux/pm_runtime.h
index 8ca52f7c357e..99ed1aa8f933 100644
--- a/include/linux/pm_runtime.h
+++ b/include/linux/pm_runtime.h
@@ -12,12 +12,15 @@
 #include <linux/device.h>
 #include <linux/pm.h>
 
+#include <linux/jiffies.h>
+
 /* Runtime PM flag argument bits */
 #define RPM_ASYNC               0x01    /* Request is asynchronous */
 #define RPM_NOWAIT              0x02    /* Don't wait for concurrent
                                             state change */
 #define RPM_GET_PUT             0x04    /* Increment/decrement the
                                             usage_count */
+#define RPM_AUTO                0x08    /* Use autosuspend_delay */
 
 #ifdef CONFIG_PM_RUNTIME
 
@@ -37,6 +40,9 @@ extern int pm_generic_runtime_idle(struct device *dev);
 extern int pm_generic_runtime_suspend(struct device *dev);
 extern int pm_generic_runtime_resume(struct device *dev);
 extern void pm_runtime_no_callbacks(struct device *dev);
+extern void __pm_runtime_use_autosuspend(struct device *dev, bool use);
+extern void pm_runtime_set_autosuspend_delay(struct device *dev, int delay);
+extern unsigned long pm_runtime_autosuspend_expiration(struct device *dev);
 
 static inline bool pm_children_suspended(struct device *dev)
 {
@@ -74,6 +80,11 @@ static inline bool pm_runtime_suspended(struct device *dev)
         return dev->power.runtime_status == RPM_SUSPENDED;
 }
 
+static inline void pm_runtime_mark_last_busy(struct device *dev)
+{
+        ACCESS_ONCE(dev->power.last_busy) = jiffies;
+}
+
 #else /* !CONFIG_PM_RUNTIME */
 
 static inline int __pm_runtime_idle(struct device *dev, int rpmflags)
@@ -113,6 +124,14 @@ static inline int pm_generic_runtime_suspend(struct device *dev) { return 0; }
 static inline int pm_generic_runtime_resume(struct device *dev) { return 0; }
 static inline void pm_runtime_no_callbacks(struct device *dev) {}
 
+static inline void pm_runtime_mark_last_busy(struct device *dev) {}
+static inline void __pm_runtime_use_autosuspend(struct device *dev,
+                                                bool use) {}
+static inline void pm_runtime_set_autosuspend_delay(struct device *dev,
+                                                int delay) {}
+static inline unsigned long pm_runtime_autosuspend_expiration(
+                                struct device *dev) { return 0; }
+
 #endif /* !CONFIG_PM_RUNTIME */
 
 static inline int pm_runtime_idle(struct device *dev)
@@ -125,6 +144,11 @@ static inline int pm_runtime_suspend(struct device *dev)
         return __pm_runtime_suspend(dev, 0);
 }
 
+static inline int pm_runtime_autosuspend(struct device *dev)
+{
+        return __pm_runtime_suspend(dev, RPM_AUTO);
+}
+
 static inline int pm_runtime_resume(struct device *dev)
 {
         return __pm_runtime_resume(dev, 0);
@@ -155,11 +179,22 @@ static inline int pm_runtime_put(struct device *dev)
         return __pm_runtime_idle(dev, RPM_GET_PUT | RPM_ASYNC);
 }
 
+static inline int pm_runtime_put_autosuspend(struct device *dev)
+{
+        return __pm_runtime_suspend(dev,
+            RPM_GET_PUT | RPM_ASYNC | RPM_AUTO);
+}
+
 static inline int pm_runtime_put_sync(struct device *dev)
 {
         return __pm_runtime_idle(dev, RPM_GET_PUT);
 }
 
+static inline int pm_runtime_put_sync_autosuspend(struct device *dev)
+{
+        return __pm_runtime_suspend(dev, RPM_GET_PUT | RPM_AUTO);
+}
+
 static inline int pm_runtime_set_active(struct device *dev)
 {
         return __pm_runtime_set_status(dev, RPM_ACTIVE);
@@ -175,4 +210,14 @@ static inline void pm_runtime_disable(struct device *dev)
         __pm_runtime_disable(dev, true);
 }
 
+static inline void pm_runtime_use_autosuspend(struct device *dev)
+{
+        __pm_runtime_use_autosuspend(dev, true);
+}
+
+static inline void pm_runtime_dont_use_autosuspend(struct device *dev)
+{
+        __pm_runtime_use_autosuspend(dev, false);
+}
+
 #endif