diff --git a/subsys/bluetooth/controller/ll_sw/ctrl.c b/subsys/bluetooth/controller/ll_sw/ctrl.c
index 2ea8c8e3e51e5a..2a5b2c255d3a56 100644
--- a/subsys/bluetooth/controller/ll_sw/ctrl.c
+++ b/subsys/bluetooth/controller/ll_sw/ctrl.c
@@ -6603,6 +6603,13 @@ static void mayfly_adv_stop(void *param)
 
 static inline void ticker_stop_adv_stop_active(void)
 {
+#if defined(CONFIG_BT_CTLR_XTAL_ADVANCED)
+	static memq_link_t link_calc;
+	static struct mayfly s_mfy_xtal_calc = {0, 0, &link_calc,
+						(void *)RADIO_TICKER_ID_ADV,
+						mayfly_xtal_stop_calc};
+#endif /* CONFIG_BT_CTLR_XTAL_ADVANCED */
+
 	static memq_link_t link_inact;
 	static struct mayfly s_mfy_radio_inactive = {0, 0, &link_inact, NULL,
 						     mayfly_radio_inactive};
@@ -6681,6 +6688,17 @@ static inline void ticker_stop_adv_stop_active(void)
 						RADIO_TICKER_USER_ID_WORKER, 0,
 						&s_mfy_xtal_stop);
 				LL_ASSERT(!ret);
+
+#if defined(CONFIG_BT_CTLR_XTAL_ADVANCED)
+				/* calc whether xtal needs to be retained after
+				 * this event
+				 */
+				ret = mayfly_enqueue(
+						RADIO_TICKER_USER_ID_JOB,
+						RADIO_TICKER_USER_ID_JOB, 0,
+						&s_mfy_xtal_calc);
+				LL_ASSERT(!ret);
+#endif /* CONFIG_BT_CTLR_XTAL_ADVANCED */
 			}
 		} else if (ret_cb_m0 == TICKER_STATUS_FAILURE) {
 			/* Step 2.1.2: Deassert Radio Active and XTAL start */
@@ -6696,6 +6714,16 @@ static inline void ticker_stop_adv_stop_active(void)
 					     RADIO_TICKER_USER_ID_WORKER, 0,
 					     &s_mfy_xtal_stop);
 			LL_ASSERT(!ret);
+
+#if defined(CONFIG_BT_CTLR_XTAL_ADVANCED)
+			/* calc whether xtal needs to be retained after this
+			 * event
+			 */
+			ret = mayfly_enqueue(RADIO_TICKER_USER_ID_JOB,
+					     RADIO_TICKER_USER_ID_JOB, 0,
+					     &s_mfy_xtal_calc);
+			LL_ASSERT(!ret);
+#endif /* CONFIG_BT_CTLR_XTAL_ADVANCED */
 		} else {
 			LL_ASSERT(0);
 		}
@@ -6717,6 +6745,16 @@ static inline void ticker_stop_adv_stop_active(void)
 						&s_mfy_radio_stop);
 			LL_ASSERT(!ret);
 
+#if defined(CONFIG_BT_CTLR_XTAL_ADVANCED)
+			/* calc whether xtal needs to be retained after this
+			 * event
+			 */
+			ret = mayfly_enqueue(RADIO_TICKER_USER_ID_JOB,
+					     RADIO_TICKER_USER_ID_JOB, 0,
+					     &s_mfy_xtal_calc);
+			LL_ASSERT(!ret);
+#endif /* CONFIG_BT_CTLR_XTAL_ADVANCED */
+
 			/* NOTE: Cannot wait here for the event to finish
 			 * as we need to let radio ISR to execute if we are in
 			 * the same priority.
@@ -10326,6 +10364,12 @@ static inline void role_active_disable(u8_t ticker_id_stop,
 				       u32_t ticks_xtal_to_start,
 				       u32_t ticks_active_to_start)
 {
+#if defined(CONFIG_BT_CTLR_XTAL_ADVANCED)
+	static memq_link_t link_calc;
+	static struct mayfly s_mfy_xtal_calc = {0, 0, &link_calc, NULL,
+						mayfly_xtal_stop_calc};
+#endif /* CONFIG_BT_CTLR_XTAL_ADVANCED */
+
 	static memq_link_t link_inact;
 	static struct mayfly s_mfy_radio_inactive = {0, 0, &link_inact, NULL,
 						     mayfly_radio_inactive};
@@ -10394,6 +10438,19 @@ static inline void role_active_disable(u8_t ticker_id_stop,
 						RADIO_TICKER_USER_ID_WORKER, 0,
 						&s_mfy_xtal_stop);
 				LL_ASSERT(!ret);
+
+#if defined(CONFIG_BT_CTLR_XTAL_ADVANCED)
+				/* calc whether xtal needs to be retained after
+				 * this event
+				 */
+				s_mfy_xtal_calc.param =
+					(void *)(u32_t)_radio.ticker_id_stop;
+				ret = mayfly_enqueue(
+						RADIO_TICKER_USER_ID_APP,
+						RADIO_TICKER_USER_ID_JOB, 0,
+						&s_mfy_xtal_calc);
+				LL_ASSERT(!ret);
+#endif /* CONFIG_BT_CTLR_XTAL_ADVANCED */
 			}
 		} else if (ret_cb_m0 == TICKER_STATUS_FAILURE) {
 			/* Step 2.1.2: Deassert Radio Active and XTAL start */
@@ -10409,6 +10466,18 @@ static inline void role_active_disable(u8_t ticker_id_stop,
 					     RADIO_TICKER_USER_ID_WORKER, 0,
 					     &s_mfy_xtal_stop);
 			LL_ASSERT(!ret);
+
+#if defined(CONFIG_BT_CTLR_XTAL_ADVANCED)
+			/* calc whether xtal needs to be retained after this
+			 * event
+			 */
+			s_mfy_xtal_calc.param =
+				(void *)(u32_t)_radio.ticker_id_stop;
+			ret = mayfly_enqueue(RADIO_TICKER_USER_ID_APP,
+					     RADIO_TICKER_USER_ID_JOB, 0,
+					     &s_mfy_xtal_calc);
+			LL_ASSERT(!ret);
+#endif /* CONFIG_BT_CTLR_XTAL_ADVANCED */
 		} else {
 			LL_ASSERT(0);
 		}
@@ -10457,6 +10526,18 @@ static inline void role_active_disable(u8_t ticker_id_stop,
 					     &s_mfy_radio_stop);
 			LL_ASSERT(!ret);
 
+#if defined(CONFIG_BT_CTLR_XTAL_ADVANCED)
+			/* calc whether xtal needs to be retained after this
+			 * event
+			 */
+			s_mfy_xtal_calc.param =
+				(void *)(u32_t)_radio.ticker_id_stop;
+			ret = mayfly_enqueue(RADIO_TICKER_USER_ID_APP,
+					     RADIO_TICKER_USER_ID_JOB, 0,
+					     &s_mfy_xtal_calc);
+			LL_ASSERT(!ret);
+#endif /* CONFIG_BT_CTLR_XTAL_ADVANCED */
+
 			/* wait for radio ISR to exit */
 			while (_radio.role != ROLE_NONE) {
 				cpu_sleep();