diff options
Diffstat (limited to 'drivers/usb/otg')
| -rw-r--r-- | drivers/usb/otg/gpio_vbus.c | 12 |
1 files changed, 10 insertions, 2 deletions
diff --git a/drivers/usb/otg/gpio_vbus.c b/drivers/usb/otg/gpio_vbus.c index ac962acfbb18..bd6e755dd3d8 100644 --- a/drivers/usb/otg/gpio_vbus.c +++ b/drivers/usb/otg/gpio_vbus.c @@ -38,6 +38,7 @@ struct gpio_vbus_data { int vbus_draw_enabled; unsigned mA; struct delayed_work work; + int vbus; }; @@ -96,18 +97,24 @@ static void gpio_vbus_work(struct work_struct *work) struct gpio_vbus_data *gpio_vbus = container_of(work, struct gpio_vbus_data, work.work); struct gpio_vbus_mach_info *pdata = gpio_vbus->dev->platform_data; - int gpio, status; + int gpio, status, vbus; if (!gpio_vbus->phy.otg->gadget) return; + vbus = is_vbus_powered(pdata); + if ((vbus ^ gpio_vbus->vbus) == 0) + return; + gpio_vbus->vbus = vbus; + /* Peripheral controllers which manage the pullup themselves won't have * gpio_pullup configured here. If it's configured here, we'll do what * isp1301_omap::b_peripheral() does and enable the pullup here... although * that may complicate usb_gadget_{,dis}connect() support. */ gpio = pdata->gpio_pullup; - if (is_vbus_powered(pdata)) { + + if (vbus) { status = USB_EVENT_VBUS; gpio_vbus->phy.state = OTG_STATE_B_PERIPHERAL; gpio_vbus->phy.last_event = status; @@ -195,6 +202,7 @@ static int gpio_vbus_set_peripheral(struct usb_otg *otg, dev_dbg(&pdev->dev, "registered gadget '%s'\n", gadget->name); /* initialize connection state */ + gpio_vbus->vbus = 0; /* start with disconnected */ gpio_vbus_irq(irq, pdev); return 0; } |