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-rw-r--r--drivers/base/power/generic_ops.c39
-rw-r--r--include/linux/pm.h26
2 files changed, 58 insertions, 7 deletions
diff --git a/drivers/base/power/generic_ops.c b/drivers/base/power/generic_ops.c
index 42f97f925629..cb3bb368681c 100644
--- a/drivers/base/power/generic_ops.c
+++ b/drivers/base/power/generic_ops.c
@@ -74,6 +74,23 @@ EXPORT_SYMBOL_GPL(pm_generic_runtime_resume);
#ifdef CONFIG_PM_SLEEP
/**
+ * pm_generic_prepare - Generic routine preparing a device for power transition.
+ * @dev: Device to prepare.
+ *
+ * Prepare a device for a system-wide power transition.
+ */
+int pm_generic_prepare(struct device *dev)
+{
+ struct device_driver *drv = dev->driver;
+ int ret = 0;
+
+ if (drv && drv->pm && drv->pm->prepare)
+ ret = drv->pm->prepare(dev);
+
+ return ret;
+}
+
+/**
* __pm_generic_call - Generic suspend/freeze/poweroff/thaw subsystem callback.
* @dev: Device to handle.
* @event: PM transition of the system under way.
@@ -213,16 +230,38 @@ int pm_generic_restore(struct device *dev)
return __pm_generic_resume(dev, PM_EVENT_RESTORE);
}
EXPORT_SYMBOL_GPL(pm_generic_restore);
+
+/**
+ * pm_generic_complete - Generic routine competing a device power transition.
+ * @dev: Device to handle.
+ *
+ * Complete a device power transition during a system-wide power transition.
+ */
+void pm_generic_complete(struct device *dev)
+{
+ struct device_driver *drv = dev->driver;
+
+ if (drv && drv->pm && drv->pm->complete)
+ drv->pm->complete(dev);
+
+ /*
+ * Let runtime PM try to suspend devices that haven't been in use before
+ * going into the system-wide sleep state we're resuming from.
+ */
+ pm_runtime_idle(dev);
+}
#endif /* CONFIG_PM_SLEEP */
struct dev_pm_ops generic_subsys_pm_ops = {
#ifdef CONFIG_PM_SLEEP
+ .prepare = pm_generic_prepare,
.suspend = pm_generic_suspend,
.resume = pm_generic_resume,
.freeze = pm_generic_freeze,
.thaw = pm_generic_thaw,
.poweroff = pm_generic_poweroff,
.restore = pm_generic_restore,
+ .complete = pm_generic_complete,
#endif
#ifdef CONFIG_PM_RUNTIME
.runtime_suspend = pm_generic_runtime_suspend,
diff --git a/include/linux/pm.h b/include/linux/pm.h
index dce7c7148771..3160648ccdda 100644
--- a/include/linux/pm.h
+++ b/include/linux/pm.h
@@ -550,6 +550,16 @@ extern void __suspend_report_result(const char *function, void *fn, int ret);
} while (0)
extern int device_pm_wait_for_dev(struct device *sub, struct device *dev);
+
+extern int pm_generic_prepare(struct device *dev);
+extern int pm_generic_suspend(struct device *dev);
+extern int pm_generic_resume(struct device *dev);
+extern int pm_generic_freeze(struct device *dev);
+extern int pm_generic_thaw(struct device *dev);
+extern int pm_generic_restore(struct device *dev);
+extern int pm_generic_poweroff(struct device *dev);
+extern void pm_generic_complete(struct device *dev);
+
#else /* !CONFIG_PM_SLEEP */
#define device_pm_lock() do {} while (0)
@@ -566,6 +576,15 @@ static inline int device_pm_wait_for_dev(struct device *a, struct device *b)
{
return 0;
}
+
+#define pm_generic_prepare NULL
+#define pm_generic_suspend NULL
+#define pm_generic_resume NULL
+#define pm_generic_freeze NULL
+#define pm_generic_thaw NULL
+#define pm_generic_restore NULL
+#define pm_generic_poweroff NULL
+#define pm_generic_complete NULL
#endif /* !CONFIG_PM_SLEEP */
/* How to reorder dpm_list after device_move() */
@@ -576,11 +595,4 @@ enum dpm_order {
DPM_ORDER_DEV_LAST,
};
-extern int pm_generic_suspend(struct device *dev);
-extern int pm_generic_resume(struct device *dev);
-extern int pm_generic_freeze(struct device *dev);
-extern int pm_generic_thaw(struct device *dev);
-extern int pm_generic_restore(struct device *dev);
-extern int pm_generic_poweroff(struct device *dev);
-
#endif /* _LINUX_PM_H */