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+What: /sys/class/usb_role/
+Date: Jan 2018
+Contact: Heikki Krogerus <heikki.krogerus@linux.intel.com>
+Description:
+ Place in sysfs for USB Role Switches. USB Role Switch is a
+ device that can select the data role (host or device) for USB
+ port.
+
+What: /sys/class/usb_role/<switch>/role
+Date: Jan 2018
+Contact: Heikki Krogerus <heikki.krogerus@linux.intel.com>
+Description:
+ The current role of the switch. This attribute can be used for
+ requesting role swapping with non-USB Type-C ports. With USB
+ Type-C ports, the ABI defined for USB Type-C connector class
+ must be used.
+
+ Valid values:
+ - none
+ - host
+ - device