PM / Runtime: Add sysfs switch for disabling device run-time PM
Add new device sysfs attribute, power/control, allowing the user
space to block the run-time power management of the devices. If this
attribute is set to "on", the driver of the device won't be able to power
manage it at run time (without breaking the rules) and the device will
always be in the full power state (except when the entire system goes
into a sleep state).
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
diff --git a/include/linux/pm.h b/include/linux/pm.h
index 198b8f9..25b1eca 100644
--- a/include/linux/pm.h
+++ b/include/linux/pm.h
@@ -430,6 +430,7 @@
unsigned int request_pending:1;
unsigned int deferred_resume:1;
unsigned int run_wake:1;
+ unsigned int runtime_auto: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 370ce0a..7d773aa 100644
--- a/include/linux/pm_runtime.h
+++ b/include/linux/pm_runtime.h
@@ -28,6 +28,8 @@
extern int pm_runtime_barrier(struct device *dev);
extern void pm_runtime_enable(struct device *dev);
extern void __pm_runtime_disable(struct device *dev, bool check_resume);
+extern void pm_runtime_allow(struct device *dev);
+extern void pm_runtime_forbid(struct device *dev);
static inline bool pm_children_suspended(struct device *dev)
{
@@ -78,6 +80,8 @@
static inline int pm_runtime_barrier(struct device *dev) { return 0; }
static inline void pm_runtime_enable(struct device *dev) {}
static inline void __pm_runtime_disable(struct device *dev, bool c) {}
+static inline void pm_runtime_allow(struct device *dev) {}
+static inline void pm_runtime_forbid(struct device *dev) {}
static inline bool pm_children_suspended(struct device *dev) { return false; }
static inline void pm_suspend_ignore_children(struct device *dev, bool en) {}