Input: add generic suspend and resume for input devices
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>
diff --git a/drivers/input/input.c b/drivers/input/input.c
index 7c237e6..b8ed429 100644
--- a/drivers/input/input.c
+++ b/drivers/input/input.c
@@ -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 @@
* 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 @@
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)