1 files changed, 38 insertions, 2 deletions

diff --git a/include/linux/pm.h b/include/linux/pm.h
index 5cfb07648eca..c61d5de837ef 100644
--- a/include/linux/pm.h
+++ b/include/linux/pm.h
@@ -219,10 +219,11 @@ typedef struct pm_message {
 
 struct dev_pm_info {
         pm_message_t            power_state;
+        unsigned                can_wakeup:1;
 #ifdef  CONFIG_PM
+        unsigned                should_wakeup:1;
         pm_message_t            prev_state;
         void                    * saved_state;
-        atomic_t                pm_users;
         struct device           * pm_parent;
         struct list_head        entry;
 #endif
@@ -236,13 +237,48 @@ extern void device_resume(void);
 
 #ifdef CONFIG_PM
 extern int device_suspend(pm_message_t state);
-#else
+
+#define device_set_wakeup_enable(dev,val) \
+        ((dev)->power.should_wakeup = !!(val))
+#define device_may_wakeup(dev) \
+        (device_can_wakeup(dev) && (dev)->power.should_wakeup)
+
+extern int dpm_runtime_suspend(struct device *, pm_message_t);
+extern void dpm_runtime_resume(struct device *);
+
+#else /* !CONFIG_PM */
+
 static inline int device_suspend(pm_message_t state)
 {
         return 0;
 }
+
+#define device_set_wakeup_enable(dev,val)       do{}while(0)
+#define device_may_wakeup(dev)                  (0)
+
+static inline int dpm_runtime_suspend(struct device * dev, pm_message_t state)
+{
+        return 0;
+}
+
+static inline void dpm_runtime_resume(struct device * dev)
+{
+
+}
+
 #endif
 
+/* changes to device_may_wakeup take effect on the next pm state change.
+ * by default, devices should wakeup if they can.
+ */
+#define device_can_wakeup(dev) \
+        ((dev)->power.can_wakeup)
+#define device_init_wakeup(dev,val) \
+        do { \
+                device_can_wakeup(dev) = !!(val); \
+                device_set_wakeup_enable(dev,val); \
+        } while(0)
+
 #endif /* __KERNEL__ */
 
 #endif /* _LINUX_PM_H */