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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>
This commit is contained in:
Stephen Hemminger 2007-09-26 00:01:25 -04:00 committed by Dmitry Torokhov
parent e15b02138b
commit 14134b31ae
1 changed files with 5 additions and 2 deletions
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7
drivers/input/input-polldev.c
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@ -70,6 +70,7 @@ static int input_open_polled_device(struct input_dev *input)
{
struct input_polled_dev *dev = input->private;
int error;
unsigned long ticks;
error = input_polldev_start_workqueue();
if (error)
@ -78,8 +79,10 @@ static int input_open_polled_device(struct input_dev *input)
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;
}