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Input: add generic suspend and resume for input devices

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Automatically turn off leds and sound effects as part of suspend
process and restore led state, sounds and repeat rate at resume.

Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
This commit is contained in:
Dmitry Torokhov 2009-09-16 01:06:43 -07:00
parent 181d683d75
commit ffd0db9719
2 changed files with 64 additions and 2 deletions
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64
drivers/input/input.c
View File

@ -11,6 +11,7 @@
*/
#include <linux/init.h>
#include <linux/types.h>
#include <linux/input.h>
#include <linux/module.h>
#include <linux/random.h>
@ -514,7 +515,7 @@ static void input_disconnect_device(struct input_dev *dev)
* that there are no threads in the middle of input_open_device()
*/
mutex_lock(&dev->mutex);
dev->going_away = 1;
dev->going_away = true;
mutex_unlock(&dev->mutex);
spin_lock_irq(&dev->event_lock);
@ -1259,10 +1260,71 @@ static int input_dev_uevent(struct device *device, struct kobj_uevent_env *env)
return 0;
}
#define INPUT_DO_TOGGLE(dev, type, bits, on) \
do { \
int i; \
if (!test_bit(EV_##type, dev->evbit)) \
break; \
for (i = 0; i < type##_MAX; i++) { \
if (!test_bit(i, dev->bits##bit) || \
!test_bit(i, dev->bits)) \
continue; \
dev->event(dev, EV_##type, i, on); \
} \
} while (0)
static void input_dev_reset(struct input_dev *dev, bool activate)
{
if (!dev->event)
return;
INPUT_DO_TOGGLE(dev, LED, led, activate);
INPUT_DO_TOGGLE(dev, SND, snd, activate);
if (activate && test_bit(EV_REP, dev->evbit)) {
dev->event(dev, EV_REP, REP_PERIOD, dev->rep[REP_PERIOD]);
dev->event(dev, EV_REP, REP_DELAY, dev->rep[REP_DELAY]);
}
}
#ifdef CONFIG_PM
static int input_dev_suspend(struct device *dev)
{
struct input_dev *input_dev = to_input_dev(dev);
mutex_lock(&input_dev->mutex);
input_dev_reset(input_dev, false);
mutex_unlock(&input_dev->mutex);
return 0;
}
static int input_dev_resume(struct device *dev)
{
struct input_dev *input_dev = to_input_dev(dev);
mutex_lock(&input_dev->mutex);
input_dev_reset(input_dev, true);
mutex_unlock(&input_dev->mutex);
return 0;
}
static const struct dev_pm_ops input_dev_pm_ops = {
.suspend = input_dev_suspend,
.resume = input_dev_resume,
.poweroff = input_dev_suspend,
.restore = input_dev_resume,
};
#endif /* CONFIG_PM */
static struct device_type input_dev_type = {
.groups = input_dev_attr_groups,
.release = input_dev_release,
.uevent = input_dev_uevent,
#ifdef CONFIG_PM
.pm = &input_dev_pm_ops,
#endif
};
static char *input_nodename(struct device *dev)

2
include/linux/input.h
View File

@ -1123,7 +1123,7 @@ struct input_dev {
struct mutex mutex;
unsigned int users;
int going_away;
bool going_away;
struct device dev;