PM / QoS: add pm_qos_update_request_timeout() API
The new API, pm_qos_update_request_timeout() is to provide a timeout
with pm_qos_update_request.
For example, pm_qos_update_request_timeout(req, 100, 1000), means that
QoS request on req with value 100 will be active for 1000 microseconds.
After 1000 microseconds, the QoS request thru req is reset. If there
were another pm_qos_update_request(req, x) during the 1000 us, this
new request with value x will override as this is another request on the
same req handle. A new request on the same req handle will always
override the previous request whether it is the conventional request or
it is the new timeout request.
Signed-off-by: MyungJoo Ham <myungjoo.ham@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Acked-by: Mark Gross <markgross@thegnar.org>
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
diff --git a/include/linux/pm_qos.h b/include/linux/pm_qos.h
index 2e9191a..233149c 100644
--- a/include/linux/pm_qos.h
+++ b/include/linux/pm_qos.h
@@ -8,6 +8,7 @@
#include <linux/notifier.h>
#include <linux/miscdevice.h>
#include <linux/device.h>
+#include <linux/workqueue.h>
enum {
PM_QOS_RESERVED = 0,
@@ -29,6 +30,7 @@
struct pm_qos_request {
struct plist_node node;
int pm_qos_class;
+ struct delayed_work work; /* for pm_qos_update_request_timeout */
};
struct dev_pm_qos_request {
@@ -73,6 +75,8 @@
s32 value);
void pm_qos_update_request(struct pm_qos_request *req,
s32 new_value);
+void pm_qos_update_request_timeout(struct pm_qos_request *req,
+ s32 new_value, unsigned long timeout_us);
void pm_qos_remove_request(struct pm_qos_request *req);
int pm_qos_request(int pm_qos_class);