Man page 9 : usb_gadget_vbus_connect

usb_gadget_vbus_connect - Notify controller that VBUS is powered

int usb_gadget_vbus_connect(struct usb_gadget *  gadget );

gadget
    The device which now has VBUS power.

can sleep

This call is used by a driver for an external transceiver (or GPIO) that detects a VBUS power session starting. Common responses include resuming the controller, activating the D+ (or D-) pullup to let the host detect that a USB device is attached, and starting to draw power (8mA or possibly more, especially after SET_CONFIGURATION).

Returns zero on success, else negative errno.

David Brownell <>
    Author.