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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
+