+What: /sys/bus/greybus/devices/N-M.I.B/gpbX
+Date: April 2016
+KernelVersion: 4.XX
+Contact: Greg Kroah-Hartman <greg@kroah.com>
+Description:
+ The General Purpose Bridged PHY device of the bundle B,
+ where X is a dynamically assigned 0-based id.
+
+What: /sys/bus/greybus/devices/N-M.I.B/state