diff --git a/src/common/qca-vendor.h b/src/common/qca-vendor.h
index 8f961bf1c..cf041938d 100644
--- a/src/common/qca-vendor.h
+++ b/src/common/qca-vendor.h
@@ -70,8 +70,25 @@ enum qca_radiotap_vendor_ids {
  *	supported by the driver. enum qca_wlan_vendor_features defines
  *	the possible features.
  *
- * @QCA_NL80211_VENDOR_SUBCMD_CAC_STARTED: Event used by driver, which
- *	supports DFS offloading, to indicate a channel availability check start.
+ * @QCA_NL80211_VENDOR_SUBCMD_DFS_OFFLOAD_CAC_STARTED: Event used by driver,
+ *	which supports DFS offloading, to indicate a channel availability check
+ *	start.
+ *
+ * @QCA_NL80211_VENDOR_SUBCMD_DFS_OFFLOAD_CAC_FINISHED: Event used by driver,
+ *	which supports DFS offloading, to indicate a channel availability check
+ *	completion.
+ *
+ * @QCA_NL80211_VENDOR_SUBCMD_DFS_OFFLOAD_CAC_ABORTED: Event used by driver,
+ *	which supports DFS offloading, to indicate that the channel availability
+ *	check aborted, no change to the channel status.
+ *
+ * @QCA_NL80211_VENDOR_SUBCMD_DFS_OFFLOAD_CAC_NOP_FINISHED: Event used by
+ *	driver, which supports DFS offloading, to indicate that the
+ *	Non-Occupancy Period for this channel is over, channel becomes usable.
+ *
+ * @QCA_NL80211_VENDOR_SUBCMD_DFS_OFFLOAD_RADAR_DETECTED: Event used by driver,
+ *	which supports DFS offloading, to indicate a radar pattern has been
+ *	detected. The channel is now unusable.
  */
 enum qca_nl80211_vendor_subcmds {
 	QCA_NL80211_VENDOR_SUBCMD_UNSPEC = 0,
@@ -118,7 +135,11 @@ enum qca_nl80211_vendor_subcmds {
 	/* 53 - reserved for QCA */
 	QCA_NL80211_VENDOR_SUBCMD_DO_ACS = 54,
 	QCA_NL80211_VENDOR_SUBCMD_GET_FEATURES = 55,
-	QCA_NL80211_VENDOR_SUBCMD_CAC_STARTED = 56,
+	QCA_NL80211_VENDOR_SUBCMD_DFS_OFFLOAD_CAC_STARTED = 56,
+	QCA_NL80211_VENDOR_SUBCMD_DFS_OFFLOAD_CAC_FINISHED = 57,
+	QCA_NL80211_VENDOR_SUBCMD_DFS_OFFLOAD_CAC_ABORTED = 58,
+	QCA_NL80211_VENDOR_SUBCMD_DFS_OFFLOAD_CAC_NOP_FINISHED = 59,
+	QCA_NL80211_VENDOR_SUBCMD_DFS_OFFLOAD_RADAR_DETECTED = 60,
 };
 
 
diff --git a/src/drivers/driver.h b/src/drivers/driver.h
index 745f8b3c5..b1d896c02 100644
--- a/src/drivers/driver.h
+++ b/src/drivers/driver.h
@@ -3763,7 +3763,7 @@ enum wpa_event_type {
 	EVENT_CONNECT_FAILED_REASON,
 
 	/**
-	 * EVENT_RADAR_DETECTED - Notify of radar detection
+	 * EVENT_DFS_RADAR_DETECTED - Notify of radar detection
 	 *
 	 * A radar has been detected on the supplied frequency, hostapd should
 	 * react accordingly (e.g., change channel).
@@ -3771,14 +3771,14 @@ enum wpa_event_type {
 	EVENT_DFS_RADAR_DETECTED,
 
 	/**
-	 * EVENT_CAC_FINISHED - Notify that channel availability check has been completed
+	 * EVENT_DFS_CAC_FINISHED - Notify that channel availability check has been completed
 	 *
 	 * After a successful CAC, the channel can be marked clear and used.
 	 */
 	EVENT_DFS_CAC_FINISHED,
 
 	/**
-	 * EVENT_CAC_ABORTED - Notify that channel availability check has been aborted
+	 * EVENT_DFS_CAC_ABORTED - Notify that channel availability check has been aborted
 	 *
 	 * The CAC was not successful, and the channel remains in the previous
 	 * state. This may happen due to a radar beeing detected or other
@@ -3787,7 +3787,7 @@ enum wpa_event_type {
 	EVENT_DFS_CAC_ABORTED,
 
 	/**
-	 * EVENT_DFS_CAC_NOP_FINISHED - Notify that non-occupancy period is over
+	 * EVENT_DFS_NOP_FINISHED - Notify that non-occupancy period is over
 	 *
 	 * The channel which was previously unavailable is now available again.
 	 */
@@ -3836,6 +3836,15 @@ enum wpa_event_type {
 	 * in device.
 	 */
 	EVENT_ACS_CHANNEL_SELECTED,
+
+	/**
+	 * EVENT_DFS_CAC_STARTED - Notify that channel availability check has
+	 * been started.
+	 *
+	 * This event indicates that channel availability check has been started
+	 * on a DFS frequency by a driver that supports DFS Offload.
+	 */
+	EVENT_DFS_CAC_STARTED,
 };
 
 
diff --git a/src/drivers/driver_common.c b/src/drivers/driver_common.c
index f897c1147..aebea8cf6 100644
--- a/src/drivers/driver_common.c
+++ b/src/drivers/driver_common.c
@@ -79,6 +79,7 @@ const char * event_to_string(enum wpa_event_type event)
 	E2S(AVOID_FREQUENCIES);
 	E2S(NEW_PEER_CANDIDATE);
 	E2S(ACS_CHANNEL_SELECTED);
+	E2S(DFS_CAC_STARTED);
 	}
 
 	return "UNKNOWN";