What:		/config/usb-gadget/gadget/functions/hid.name
Date:		Nov 2014
KernelVersion:	3.19
Description:
		The attributes:

		protocol	- HID protocol to use
		report_desc	- blob corresponding to HID report descriptors
				except the data passed through /dev/hidg<N>
		report_length	- HID report length
		subclass	- HID device subclass to use