Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / Documentation / ABI / testing / configfs-usb-gadget

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+What:          /config/usb-gadget
+Date:          Jun 2013
+KernelVersion: 3.11
+Description:
+               This group contains sub-groups corresponding to created
+               USB gadgets.
+
+What:          /config/usb-gadget/gadget
+Date:          Jun 2013
+KernelVersion: 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
+KernelVersion: 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
+KernelVersion: 3.11
+Description:
+               This group contains functions available to this USB gadget.
+
+What:          /config/usb-gadget/gadget/functions/<func>.<inst>/interface.<n>
+Date:          May 2014
+KernelVersion: 3.16
+Description:
+               This group contains "Feature Descriptors" specific for one
+               gadget's USB interface or one interface group described
+               by an IAD.
+
+               The attributes:
+
+               compatible_id           - 8-byte string for "Compatible ID"
+               sub_compatible_id       - 8-byte string for "Sub Compatible ID"
+
+What:          /config/usb-gadget/gadget/functions/<func>.<inst>/interface.<n>/<property>
+Date:          May 2014
+KernelVersion: 3.16
+Description:
+               This group contains "Extended Property Descriptors" specific for one
+               gadget's USB interface or one interface group described
+               by an IAD.
+
+               The attributes:
+
+               type            - value 1..7 for interpreting the data
+                               1: unicode string
+                               2: unicode string with environment variable
+                               3: binary
+                               4: little-endian 32-bit
+                               5: big-endian 32-bit
+                               6: unicode string with a symbolic link
+                               7: multiple unicode strings
+               data            - blob of data to be interpreted depending on
+                               type
+
+What:          /config/usb-gadget/gadget/strings
+Date:          Jun 2013
+KernelVersion: 3.11
+Description:
+               This group contains subdirectories for language-specific
+               strings for this gadget.
+
+What:          /config/usb-gadget/gadget/strings/language
+Date:          Jun 2013
+KernelVersion: 3.11
+Description:
+               The attributes:
+
+               serialnumber    - gadget's serial number (string)
+               product         - gadget's product description
+               manufacturer    - gadget's manufacturer description
+
+What:          /config/usb-gadget/gadget/os_desc
+Date:          May 2014
+KernelVersion: 3.16
+Description:
+               This group contains "OS String" extension handling attributes.
+
+               use             - flag turning "OS Desctiptors" support on/off
+               b_vendor_code   - one-byte value used for custom per-device and
+                               per-interface requests
+               qw_sign         - an identifier to be reported as "OS String"
+                               proper