Input: polled device power saving
For slow running polling, it saves power to align wakeups on tick boundary.
Signed-off-by: Stephen Hemminger <shemminger@linux-foundation.org>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
diff --git a/drivers/input/input-polldev.c b/drivers/input/input-polldev.c
index b773d4c..92b3598 100644
--- a/drivers/input/input-polldev.c
+++ b/drivers/input/input-polldev.c
@@ -70,6 +70,7 @@
{
struct input_polled_dev *dev = input->private;
int error;
+ unsigned long ticks;
error = input_polldev_start_workqueue();
if (error)
@@ -78,8 +79,10 @@
if (dev->flush)
dev->flush(dev);
- queue_delayed_work(polldev_wq, &dev->work,
- msecs_to_jiffies(dev->poll_interval));
+ ticks = msecs_to_jiffies(dev->poll_interval);
+ if (ticks >= HZ)
+ ticks = round_jiffies(ticks);
+ queue_delayed_work(polldev_wq, &dev->work, ticks);
return 0;
}