PM: Add flag for devices capable of generating run-time wake-up events
Apparently, there are devices that can wake up the system from sleep
states and yet are incapable of generating wake-up events at run
time. Thus, introduce a flag indicating if given device is capable
of generating run-time wake-up events.
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
diff --git a/include/linux/pm.h b/include/linux/pm.h
index 3b7e04b..0d65934 100644
--- a/include/linux/pm.h
+++ b/include/linux/pm.h
@@ -178,9 +178,10 @@
* This need not mean that the device should be put into a low power state.
* For example, if the device is behind a link which is about to be turned
* off, the device may remain at full power. If the device does go to low
- * power and if device_may_wakeup(dev) is true, remote wake-up (i.e., a
- * hardware mechanism allowing the device to request a change of its power
- * state, such as PCI PME) should be enabled for it.
+ * power and is capable of generating run-time wake-up events, remote
+ * wake-up (i.e., a hardware mechanism allowing the device to request a
+ * change of its power state via a wake-up event, such as PCI PME) should
+ * be enabled for it.
*
* @runtime_resume: Put the device into the fully active state in response to a
* wake-up event generated by hardware or at the request of software. If
@@ -428,6 +429,7 @@
unsigned int idle_notification:1;
unsigned int request_pending:1;
unsigned int deferred_resume:1;
+ unsigned int run_wake:1;
enum rpm_request request;
enum rpm_status runtime_status;
int runtime_error;
diff --git a/include/linux/pm_runtime.h b/include/linux/pm_runtime.h
index 4408704..370ce0a 100644
--- a/include/linux/pm_runtime.h
+++ b/include/linux/pm_runtime.h
@@ -50,6 +50,16 @@
atomic_add_unless(&dev->power.usage_count, -1, 0);
}
+static inline bool device_run_wake(struct device *dev)
+{
+ return dev->power.run_wake;
+}
+
+static inline void device_set_run_wake(struct device *dev, bool enable)
+{
+ dev->power.run_wake = enable;
+}
+
#else /* !CONFIG_PM_RUNTIME */
static inline int pm_runtime_idle(struct device *dev) { return -ENOSYS; }
@@ -73,6 +83,8 @@
static inline void pm_suspend_ignore_children(struct device *dev, bool en) {}
static inline void pm_runtime_get_noresume(struct device *dev) {}
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) {}
#endif /* !CONFIG_PM_RUNTIME */