usb_gadget_frame_number(9) centos man page | unix.com

USB_GADGET_FRAME_NUM(9) 				      Kernel Mode Gadget API					   USB_GADGET_FRAME_NUM(9)

NAME
       usb_gadget_frame_number - returns the current frame number

SYNOPSIS
       int usb_gadget_frame_number(struct usb_gadget * gadget);

ARGUMENTS
       gadget
	   controller that reports the frame number

DESCRIPTION
       Returns the usb frame number, normally eleven bits from a SOF packet, or negative errno if this device doesn't support this capability.

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

COPYRIGHT
Kernel Hackers Manual 3.10					     June 2014						   USB_GADGET_FRAME_NUM(9)