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path: root/drivers/input/keyboard/gpio_keys.c
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Diffstat (limited to 'drivers/input/keyboard/gpio_keys.c')
-rw-r--r--drivers/input/keyboard/gpio_keys.c19
1 files changed, 14 insertions, 5 deletions
diff --git a/drivers/input/keyboard/gpio_keys.c b/drivers/input/keyboard/gpio_keys.c
index b8213fd13c3..a9fd147f2ba 100644
--- a/drivers/input/keyboard/gpio_keys.c
+++ b/drivers/input/keyboard/gpio_keys.c
@@ -31,6 +31,7 @@ struct gpio_button_data {
struct input_dev *input;
struct timer_list timer;
struct work_struct work;
+ int timer_debounce; /* in msecs */
bool disabled;
};
@@ -109,7 +110,7 @@ static void gpio_keys_disable_button(struct gpio_button_data *bdata)
* Disable IRQ and possible debouncing timer.
*/
disable_irq(gpio_to_irq(bdata->button->gpio));
- if (bdata->button->debounce_interval)
+ if (bdata->timer_debounce)
del_timer_sync(&bdata->timer);
bdata->disabled = true;
@@ -347,9 +348,9 @@ static irqreturn_t gpio_keys_isr(int irq, void *dev_id)
BUG_ON(irq != gpio_to_irq(button->gpio));
- if (button->debounce_interval)
+ if (bdata->timer_debounce)
mod_timer(&bdata->timer,
- jiffies + msecs_to_jiffies(button->debounce_interval));
+ jiffies + msecs_to_jiffies(bdata->timer_debounce));
else
schedule_work(&bdata->work);
@@ -383,6 +384,14 @@ static int __devinit gpio_keys_setup_key(struct platform_device *pdev,
goto fail3;
}
+ if (button->debounce_interval) {
+ error = gpio_set_debounce(button->gpio,
+ button->debounce_interval * 1000);
+ /* use timer if gpiolib doesn't provide debounce */
+ if (error < 0)
+ bdata->timer_debounce = button->debounce_interval;
+ }
+
irq = gpio_to_irq(button->gpio);
if (irq < 0) {
error = irq;
@@ -498,7 +507,7 @@ static int __devinit gpio_keys_probe(struct platform_device *pdev)
fail2:
while (--i >= 0) {
free_irq(gpio_to_irq(pdata->buttons[i].gpio), &ddata->data[i]);
- if (pdata->buttons[i].debounce_interval)
+ if (ddata->data[i].timer_debounce)
del_timer_sync(&ddata->data[i].timer);
cancel_work_sync(&ddata->data[i].work);
gpio_free(pdata->buttons[i].gpio);
@@ -526,7 +535,7 @@ static int __devexit gpio_keys_remove(struct platform_device *pdev)
for (i = 0; i < pdata->nbuttons; i++) {
int irq = gpio_to_irq(pdata->buttons[i].gpio);
free_irq(irq, &ddata->data[i]);
- if (pdata->buttons[i].debounce_interval)
+ if (ddata->data[i].timer_debounce)
del_timer_sync(&ddata->data[i].timer);
cancel_work_sync(&ddata->data[i].work);
gpio_free(pdata->buttons[i].gpio);