Index: uspace/lib/usbhost/include/usb/host/bus.h
===================================================================
--- uspace/lib/usbhost/include/usb/host/bus.h	(revision 6271a349ac2cca2530102d30f2c9decf64972d81)
+++ uspace/lib/usbhost/include/usb/host/bus.h	(revision 58f4c0fc4eecabe73ea09902fd92e2d3098b337b)
@@ -68,5 +68,10 @@
 	/* Invalid for the roothub device */
 	unsigned port;
+
+	/** Hub under which this device is connected */
 	struct device *hub;
+
+	/** USB Tier of the device */
+	uint8_t tier;
 
 	/* Transaction translator */