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Commit 14134b31 authored by Stephen Hemminger's avatar Stephen Hemminger Committed by Dmitry Torokhov
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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: default avatarStephen Hemminger <shemminger@linux-foundation.org>
Signed-off-by: default avatarDmitry Torokhov <dtor@mail.ru>
parent e15b0213

drivers/input/input-polldev.c

+5 −2
Original line number Diff line number Diff line
@@ -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;

}