usb_bus_start_enum(9) centos man page | unix.com

USB_BUS_START_ENUM(9)					       Host Controller APIs					     USB_BUS_START_ENUM(9)

NAME
       usb_bus_start_enum - start immediate enumeration (for OTG)

SYNOPSIS
       int usb_bus_start_enum(struct usb_bus * bus, unsigned port_num);

ARGUMENTS
       bus
	   the bus (must use hcd framework)

       port_num
	   1-based number of port; usually bus->otg_port

CONTEXT
       in_interrupt

DESCRIPTION
       Starts enumeration, with an immediate reset followed later by khubd identifying and possibly configuring the device. This is needed by OTG
       controller drivers, where it helps meet HNP protocol timing requirements for starting a port reset.

RETURN
       0 if successful.

COPYRIGHT
Kernel Hackers Manual 3.10					     June 2014						     USB_BUS_START_ENUM(9)