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
