diff --git a/include/linux/usb/otg.h b/include/linux/usb/otg.h
index 52bb917..6c0b676 100644
--- a/include/linux/usb/otg.h
+++ b/include/linux/usb/otg.h
@@ -9,6 +9,8 @@
 #ifndef __LINUX_USB_OTG_H
 #define __LINUX_USB_OTG_H
 
+#include <linux/notifier.h>
+
 /* OTG defines lots of enumeration states before device reset */
 enum usb_otg_state {
 	OTG_STATE_UNDEFINED = 0,
@@ -33,6 +35,14 @@
 	OTG_STATE_A_VBUS_ERR,
 };
 
+enum usb_xceiv_events {
+	USB_EVENT_NONE,         /* no events or cable disconnected */
+	USB_EVENT_VBUS,         /* vbus valid event */
+	USB_EVENT_ID,           /* id was grounded */
+	USB_EVENT_CHARGER,      /* usb dedicated charger */
+	USB_EVENT_ENUMERATED,   /* gadget driver enumerated */
+};
+
 #define USB_OTG_PULLUP_ID		(1 << 0)
 #define USB_OTG_PULLDOWN_DP		(1 << 1)
 #define USB_OTG_PULLDOWN_DM		(1 << 2)
@@ -70,6 +80,9 @@
 	struct otg_io_access_ops	*io_ops;
 	void __iomem			*io_priv;
 
+	/* for notification of usb_xceiv_events */
+	struct blocking_notifier_head	notifier;
+
 	/* to pass extra port status to the root hub */
 	u16			port_status;
 	u16			port_change;
@@ -203,6 +216,18 @@
 	return otg->start_srp(otg);
 }
 
+/* notifiers */
+static inline int
+otg_register_notifier(struct otg_transceiver *otg, struct notifier_block *nb)
+{
+	return blocking_notifier_chain_register(&otg->notifier, nb);
+}
+
+static inline void
+otg_unregister_notifier(struct otg_transceiver *otg, struct notifier_block *nb)
+{
+	blocking_notifier_chain_unregister(&otg->notifier, nb);
+}
 
 /* for OTG controller drivers (and maybe other stuff) */
 extern int usb_bus_start_enum(struct usb_bus *bus, unsigned port_num);