diff --git a/boards/nordic/nrf54l15dk/nrf54l15dk_common.dtsi b/boards/nordic/nrf54l15dk/nrf54l15dk_common.dtsi
index c030c2c55189..6740544b524a 100644
--- a/boards/nordic/nrf54l15dk/nrf54l15dk_common.dtsi
+++ b/boards/nordic/nrf54l15dk/nrf54l15dk_common.dtsi
@@ -108,5 +108,9 @@
 	pinctrl-names = "default", "sleep";
 };
 
+&hfxo {
+	startup-time-us = <854>;
+};
+
 /* Get a node label for wi-fi spi to use in shield files */
 wifi_spi: &spi22 {};
diff --git a/modules/hal_nordic/Kconfig b/modules/hal_nordic/Kconfig
index 8053017170e6..665fe2cc95b0 100644
--- a/modules/hal_nordic/Kconfig
+++ b/modules/hal_nordic/Kconfig
@@ -163,12 +163,12 @@ config NRF_802154_CCA_MODE_CARRIER_OR_ED
 
 endchoice
 
-config NRF_802154_CCA_ED_THRESHOLD
-	int "nRF IEEE 802.15.4 CCA Energy Detection threshold"
-	default 45
+config NRF_802154_CCA_ED_THRESHOLD_DBM
+	int "nRF IEEE 802.15.4 CCA Energy Detection threshold in dBm"
+	default -75
 	help
 	  If energy detected in a given channel is above the value then the
-	  channel is deemed busy. The unit is defined as per 802.15.4-2006 spec.
+	  channel is deemed busy. The unit is dBm.
 
 config NRF_802154_CCA_CORR_THRESHOLD
 	int "nRF IEEE 802.15.4 CCA Correlator threshold"
diff --git a/modules/hal_nordic/nrf_802154/CMakeLists.txt b/modules/hal_nordic/nrf_802154/CMakeLists.txt
index 1fc5c85ec0b1..957019ff1e67 100644
--- a/modules/hal_nordic/nrf_802154/CMakeLists.txt
+++ b/modules/hal_nordic/nrf_802154/CMakeLists.txt
@@ -52,7 +52,7 @@ target_compile_definitions(zephyr-802154-interface
     # CCA mode options
     NRF_802154_CCA_CORR_LIMIT_DEFAULT=${CONFIG_NRF_802154_CCA_CORR_LIMIT}
     NRF_802154_CCA_CORR_THRESHOLD_DEFAULT=${CONFIG_NRF_802154_CCA_CORR_THRESHOLD}
-    NRF_802154_CCA_ED_THRESHOLD_DEFAULT=${CONFIG_NRF_802154_CCA_ED_THRESHOLD}
+    NRF_802154_CCA_ED_THRESHOLD_DBM_DEFAULT=${CONFIG_NRF_802154_CCA_ED_THRESHOLD_DBM}
 
     # Key storage size
     NRF_802154_SECURITY_KEY_STORAGE_SIZE=${CONFIG_NRF_802154_SECURITY_KEY_STORAGE_SIZE}
diff --git a/modules/hal_nordic/nrf_802154/sl_opensource/platform/nrf_802154_clock_zephyr.c b/modules/hal_nordic/nrf_802154/sl_opensource/platform/nrf_802154_clock_zephyr.c
index ca4f8c11c9c7..1dcf724b0e52 100644
--- a/modules/hal_nordic/nrf_802154/sl_opensource/platform/nrf_802154_clock_zephyr.c
+++ b/modules/hal_nordic/nrf_802154/sl_opensource/platform/nrf_802154_clock_zephyr.c
@@ -18,7 +18,11 @@ static bool hfclk_is_running;
 
 void nrf_802154_clock_init(void)
 {
-	/* Intentionally empty. */
+#ifdef NRF54L_SERIES
+	uint32_t clock_latency_us = z_nrf_clock_bt_ctlr_hf_get_startup_time_us();
+
+	nrf_802154_clock_hfclk_latency_set(clock_latency_us);
+#endif
 }
 
 void nrf_802154_clock_deinit(void)