rk: usb_detect: add irq debounce for gpio detect

diff --git a/arch/arm/plat-rk/usb_detect.c b/arch/arm/plat-rk/usb_detect.c
index 3d5dbcdfd35b7a05437190f98cc8084f2942646f..85bdded7bc74d0c2a528407ba885d04dacd2d60e 100755 (executable)
--- a/arch/arm/plat-rk/usb_detect.c
+++ b/arch/arm/plat-rk/usb_detect.c
@@ -22,6 +22,7 @@ static void usb_detect_do_wakeup(struct work_struct *work)
        if (ret < 0) {
                pr_err("%s: irq_set_irq_type(%d, %d) failed\n", __func__, irq, type);
        }
+       enable_irq(irq);
 }
 
 static DECLARE_DELAYED_WORK(wakeup_work, usb_detect_do_wakeup);
@@ -30,6 +31,7 @@ static struct wake_lock usb_wakelock;
 
 static irqreturn_t usb_detect_irq_handler(int irq, void *dev_id)
 {
+       disable_irq_nosync(irq); // for irq debounce
        wake_lock_timeout(&usb_wakelock, WAKE_LOCK_TIMEOUT);
        schedule_delayed_work(&wakeup_work, HZ / 10);
        return IRQ_HANDLED;