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authorDmitry Torokhov <dmitry.torokhov@gmail.com>2009-09-16 01:06:43 -0700
committerDmitry Torokhov <dmitry.torokhov@gmail.com>2009-09-17 23:23:58 -0700
commitffd0db97196c1057f09c2ab42dd5b30e94e511d9 (patch)
tree5ac8654257d52612227c6eab1b32e13a71b9c54d
parent181d683d752c432635eda0f182ee71548c1f1820 (diff)
downloadop-kernel-dev-ffd0db97196c1057f09c2ab42dd5b30e94e511d9.zip
op-kernel-dev-ffd0db97196c1057f09c2ab42dd5b30e94e511d9.tar.gz
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>
-rw-r--r--drivers/input/input.c64
-rw-r--r--include/linux/input.h2
2 files changed, 64 insertions, 2 deletions
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 @@ 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)
diff --git a/include/linux/input.h b/include/linux/input.h
index 8b3bc3e0..0ccfc30 100644
--- a/include/linux/input.h
+++ b/include/linux/input.h
@@ -1123,7 +1123,7 @@ struct input_dev {
struct mutex mutex;
unsigned int users;
- int going_away;
+ bool going_away;
struct device dev;
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