diff options
| -rw-r--r-- | drivers/platform/msm/gpio-usbdetect.c | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/drivers/platform/msm/gpio-usbdetect.c b/drivers/platform/msm/gpio-usbdetect.c index 1628253fb545..97682436f92c 100644 --- a/drivers/platform/msm/gpio-usbdetect.c +++ b/drivers/platform/msm/gpio-usbdetect.c @@ -77,8 +77,16 @@ static irqreturn_t gpio_usbdetect_id_irq(int irq, void *data) static irqreturn_t gpio_usbdetect_id_irq_thread(int irq, void *data) { struct gpio_usbdetect *usb = data; + bool curr_id_state; + static int prev_id_state = -EINVAL; - if (usb->id_state) { + curr_id_state = usb->id_state; + if (curr_id_state == prev_id_state) { + dev_dbg(&usb->pdev->dev, "no change in ID state\n"); + return IRQ_HANDLED; + } + + if (curr_id_state) { dev_dbg(&usb->pdev->dev, "stopping usb host\n"); extcon_set_cable_state_(usb->extcon_dev, EXTCON_USB_HOST, 0); enable_irq(usb->vbus_det_irq); @@ -88,6 +96,8 @@ static irqreturn_t gpio_usbdetect_id_irq_thread(int irq, void *data) extcon_set_cable_state_(usb->extcon_dev, EXTCON_USB_SPEED, 1); extcon_set_cable_state_(usb->extcon_dev, EXTCON_USB_HOST, 1); } + + prev_id_state = curr_id_state; return IRQ_HANDLED; } |