Index: uspace/lib/usbdev/include/usb/dev/driver.h
===================================================================
--- uspace/lib/usbdev/include/usb/dev/driver.h	(revision ec700c75765e920cd0cb4090eb421a98256eb4b3)
+++ uspace/lib/usbdev/include/usb/dev/driver.h	(revision 6b2930bfefb987dc1d4ba5cbee4cf72814ef52ce)
@@ -48,4 +48,8 @@
 	/** Callback when a device was removed from the system. */
 	int (*device_gone)(usb_device_t *);
+	/** Callback asking the driver to online a specific function. */
+	int (*function_online)(ddf_fun_t *);
+	/** Callback asking the driver to offline a specific function. */
+	int (*function_offline)(ddf_fun_t *);
 } usb_driver_ops_t;