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+What:           /config/usb-gadget
+Date:           Jun 2013
+KenelVersion:   3.11
+Description:
+                This group contains sub-groups corresponding to created
+                USB gadgets.
+
+What:           /config/usb-gadget/gadget
+Date:           Jun 2013
+KenelVersion:   3.11
+Description:
+
+                The attributes of a gadget:
+
+                UDC             - bind a gadget to UDC/unbind a gadget;
+                                write UDC's name found in /sys/class/udc/*
+                                to bind a gadget, empty string "" to unbind.
+
+                bDeviceClass    - USB device class code
+                bDeviceSubClass - USB device subclass code
+                bDeviceProtocol - USB device protocol code
+                bMaxPacketSize0 - maximum endpoint 0 packet size
+                bcdDevice       - bcd device release number
+                bcdUSB          - bcd USB specification version number
+                idProduct       - product ID
+                idVendor        - vendor ID
+
+What:           /config/usb-gadget/gadget/configs
+Date:           Jun 2013
+KenelVersion:   3.11
+Description:
+                This group contains a USB gadget's configurations
+
+What:           /config/usb-gadget/gadget/configs/config
+Date:           Jun 2013
+KernelVersion:  3.11
+Description:
+                The attributes of a configuration:
+
+                bmAttributes    - configuration characteristics
+                MaxPower        - maximum power consumption from the bus
+
+What:           /config/usb-gadget/gadget/configs/config/strings
+Date:           Jun 2013
+KernelVersion:  3.11
+Description:
+                This group contains subdirectories for language-specific
+                strings for this configuration.
+
+What:           /config/usb-gadget/gadget/configs/config/strings/language
+Date:           Jun 2013
+KernelVersion:  3.11
+Description:
+                The attributes:
+
+                configuration   - configuration description
+
+
+What:           /config/usb-gadget/gadget/functions
+Date:           Jun 2013
+KenelVersion:   3.11
+Description:
+                This group contains functions available to this USB gadget.
+
+What:           /config/usb-gadget/gadget/strings
+Date:           Jun 2013
+KenelVersion:   3.11
+Description:
+                This group contains subdirectories for language-specific
+                strings for this gadget.
+
+What:           /config/usb-gadget/gadget/strings/language
+Date:           Jun 2013
+KenelVersion:   3.11
+Description:
+                The attributes:
+
+                serialnumber    - gadget's serial number (string)
+                product         - gadget's product description
+                manufacturer    - gadget's manufacturer description
+