usb_gadget_vbus_connect(9) centos man page | unix.com

USB_GADGET_VBUS_CONN(9) 				      Kernel Mode Gadget API					   USB_GADGET_VBUS_CONN(9)

NAME
       usb_gadget_vbus_connect - Notify controller that VBUS is powered

SYNOPSIS
       int usb_gadget_vbus_connect(struct usb_gadget * gadget);

ARGUMENTS
       gadget
	   The device which now has VBUS power.

CONTEXT
       can sleep

DESCRIPTION
       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.

AUTHOR
       David Brownell <dbrownell@users.sourceforge.net>
	   Author.

COPYRIGHT
Kernel Hackers Manual 3.10					     June 2014						   USB_GADGET_VBUS_CONN(9)