centos man page for usb_add_config

USB_ADD_CONFIG(9)					      Kernel Mode Gadget API						 USB_ADD_CONFIG(9)

NAME
       usb_add_config - add a configuration to a device.

SYNOPSIS
       int usb_add_config(struct usb_composite_dev * cdev, struct usb_configuration * config, int (*bind) (struct usb_configuration *));

ARGUMENTS
       cdev
	   wraps the USB gadget

       config
	   the configuration, with bConfigurationValue assigned

       bind
	   the configuration's bind function

CONTEXT
       single threaded during gadget setup

DESCRIPTION
       One of the main tasks of a composite bind() routine is to add each of the configurations it supports, using this routine.

       This function returns the value of the configuration's bind(), which is zero for success else a negative errno value. Binding
       configurations assigns global resources including string IDs, and per-configuration resources such as interface IDs and endpoints.

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

COPYRIGHT
Kernel Hackers Manual 3.10					     June 2014							 USB_ADD_CONFIG(9)