nrfconnect · rlubos · Jun 12, 2025 · May 26, 2025 · May 26, 2025 · May 26, 2025
diff --git a/boards/nordic/nrf54l15dk/Kconfig.defconfig b/boards/nordic/nrf54l15dk/Kconfig.defconfig
@@ -5,11 +5,6 @@
 DT_CHOSEN_Z_CODE_PARTITION := zephyr,code-partition
 DT_CHOSEN_Z_SRAM_PARTITION := zephyr,sram-secure-partition
 
-# The 54L has a HFXO latency which is better than the default.
-config MPSL_HFCLK_LATENCY
-	int
-	default 854 if MPSL
-
 if BOARD_NRF54L15DK_NRF54L05_CPUAPP || BOARD_NRF54L15DK_NRF54L10_CPUAPP || \
 	BOARD_NRF54L15DK_NRF54L15_CPUAPP
 

diff --git a/boards/nordic/nrf54l15dk/nrf54l15dk_common.dtsi b/boards/nordic/nrf54l15dk/nrf54l15dk_common.dtsi
@@ -99,5 +99,9 @@
 	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/drivers/clock_control/Kconfig.nrf b/drivers/clock_control/Kconfig.nrf
@@ -130,8 +130,7 @@ endif # CLOCK_CONTROL_NRF_K32SRC_RC_CALIBRATION
 
 config CLOCK_CONTROL_NRF_HFINT_CALIBRATION
 	bool "HFINT clock calibration"
-	depends on SOC_NRF54L05 || SOC_NRF54L10 || SOC_NRF54L15
-	depends on DT_HAS_NORDIC_NRF_HFXO_ENABLED
+	depends on DT_HAS_NORDIC_NRF54L_HFXO_ENABLED
 	depends on !TRUSTED_EXECUTION_NONSECURE
 	select EXPERIMENTAL
 	help

diff --git a/drivers/clock_control/clock_control_nrf.c b/drivers/clock_control/clock_control_nrf.c
@@ -436,6 +436,13 @@ void z_nrf_clock_bt_ctlr_hf_release(void)
 	irq_unlock(key);
 }
 
+#if DT_NODE_EXISTS(DT_NODELABEL(hfxo))
+uint32_t z_nrf_clock_bt_ctlr_hf_get_startup_time_us(void)
+{
+	return DT_PROP(DT_NODELABEL(hfxo), startup_time_us);
+}
+#endif
+
 static int stop(const struct device *dev, clock_control_subsys_t subsys,
 		uint32_t ctx)
 {

diff --git a/dts/arm/nordic/nrf51822.dtsi b/dts/arm/nordic/nrf51822.dtsi
@@ -22,6 +22,15 @@
 		};
 	};
 
+	clocks {
+		hfxo: hfxo {
+			compatible = "nordic,nrf51-hfxo";
+			clock-frequency = <16000000>;
+			startup-time-us = <1400>;
+			#clock-cells = <0>;
+		};
+	};
+
 	soc {
 		ficr: ficr@10000000 {
 			compatible = "nordic,nrf-ficr";

diff --git a/dts/arm/nordic/nrf52805.dtsi b/dts/arm/nordic/nrf52805.dtsi
@@ -27,6 +27,15 @@
 		};
 	};
 
+	clocks {
+		hfxo: hfxo {
+			compatible = "nordic,nrf52-hfxo";
+			clock-frequency = <64000000>;
+			startup-time-us = <1400>;
+			#clock-cells = <0>;
+		};
+	};
+
 	soc {
 		ficr: ficr@10000000 {
 			compatible = "nordic,nrf-ficr";

diff --git a/dts/arm/nordic/nrf52810.dtsi b/dts/arm/nordic/nrf52810.dtsi
@@ -31,6 +31,15 @@
 		};
 	};
 
+	clocks {
+		hfxo: hfxo {
+			compatible = "nordic,nrf52-hfxo";
+			clock-frequency = <64000000>;
+			startup-time-us = <1400>;
+			#clock-cells = <0>;
+		};
+	};
+
 	soc {
 		ficr: ficr@10000000 {
 			compatible = "nordic,nrf-ficr";

diff --git a/dts/arm/nordic/nrf52811.dtsi b/dts/arm/nordic/nrf52811.dtsi
@@ -35,6 +35,15 @@
 		};
 	};
 
+	clocks {
+		hfxo: hfxo {
+			compatible = "nordic,nrf52-hfxo";
+			clock-frequency = <64000000>;
+			startup-time-us = <1400>;
+			#clock-cells = <0>;
+		};
+	};
+
 	soc {
 		ficr: ficr@10000000 {
 			compatible = "nordic,nrf-ficr";

diff --git a/dts/arm/nordic/nrf52820.dtsi b/dts/arm/nordic/nrf52820.dtsi
@@ -35,6 +35,15 @@
 		};
 	};
 
+	clocks {
+		hfxo: hfxo {
+			compatible = "nordic,nrf52-hfxo";
+			clock-frequency = <64000000>;
+			startup-time-us = <1400>;
+			#clock-cells = <0>;
+		};
+	};
+
 	soc {
 		ficr: ficr@10000000 {
 			compatible = "nordic,nrf-ficr";

diff --git a/dts/arm/nordic/nrf52832.dtsi b/dts/arm/nordic/nrf52832.dtsi
@@ -31,6 +31,15 @@
 		};
 	};
 
+	clocks {
+		hfxo: hfxo {
+			compatible = "nordic,nrf52-hfxo";
+			clock-frequency = <64000000>;
+			startup-time-us = <1400>;
+			#clock-cells = <0>;
+		};
+	};
+
 	soc {
 		ficr: ficr@10000000 {
 			compatible = "nordic,nrf-ficr";

diff --git a/dts/arm/nordic/nrf52833.dtsi b/dts/arm/nordic/nrf52833.dtsi
@@ -35,6 +35,15 @@
 		};
 	};
 
+	clocks {
+		hfxo: hfxo {
+			compatible = "nordic,nrf52-hfxo";
+			clock-frequency = <64000000>;
+			startup-time-us = <1400>;
+			#clock-cells = <0>;
+		};
+	};
+
 	soc {
 		ficr: ficr@10000000 {
 			compatible = "nordic,nrf-ficr";

diff --git a/dts/arm/nordic/nrf52840.dtsi b/dts/arm/nordic/nrf52840.dtsi
@@ -31,6 +31,15 @@
 		};
 	};
 
+	clocks {
+		hfxo: hfxo {
+			compatible = "nordic,nrf52-hfxo";
+			clock-frequency = <64000000>;
+			startup-time-us = <1400>;
+			#clock-cells = <0>;
+		};
+	};
+
 	soc {
 		ficr: ficr@10000000 {
 			compatible = "nordic,nrf-ficr";

diff --git a/dts/arm/nordic/nrf5340_cpuapp_peripherals.dtsi b/dts/arm/nordic/nrf5340_cpuapp_peripherals.dtsi
@@ -26,6 +26,7 @@ oscillators: clock-controller@4000 {
 		compatible = "nordic,nrf53-hfxo";
 		#clock-cells = <0>;
 		clock-frequency = <DT_FREQ_M(32)>;
+		startup-time-us = <1400>;
 	};
 };
 

diff --git a/dts/bindings/clock/nordic,nrf51-hfxo.yaml b/dts/bindings/clock/nordic,nrf51-hfxo.yaml
@@ -0,0 +1,26 @@
+# Copyright (c) 2025 Nordic Semiconductor ASA
+# SPDX-License-Identifier: Apache-2.0
+
+description: Nordic nRF high-frequency crystal oscillator (nRF51 series)
+
+compatible: "nordic,nrf51-hfxo"
+
+include: fixed-clock.yaml
+
+properties:
+  clock-frequency:
+    const: 16000000
+
+  startup-time-us:
+    type: int
+    required: true
+    description: |
+      Startup time in microseconds.
+
+      The value can be obtained by first measuring the time between
+      TASKS_HFCLKSTART and EVENTS_HFCLKSTARTED. Then multiply
+      the value by 2 to account for temperature and supply variations.
+
+      Note that the startup time will be longer usual on the first
+      power-up and as such should not be used to determine
+      startup-time-us.
diff --git a/dts/bindings/clock/nordic,nrf52-hfxo.yaml b/dts/bindings/clock/nordic,nrf52-hfxo.yaml
@@ -0,0 +1,25 @@
+# Copyright (c) 2025 Nordic Semiconductor ASA
+# SPDX-License-Identifier: Apache-2.0
+
+description: Nordic nRF high-frequency crystal oscillator (nRF52 series)
+
+compatible: "nordic,nrf52-hfxo"
+
+include: fixed-clock.yaml
+
+properties:
+  clock-frequency:
+    const: 64000000
+
+  startup-time-us:
+    type: int
+    description: |
+      Startup time in microseconds.
+
+      The value can be obtained by first measuring the time between
+      TASKS_HFCLKSTART and EVENTS_HFCLKSTARTED. Then multiply
+      the value by 2 to account for temperature and supply variations.
+
+      Note that the startup time will be longer usual on the first
+      power-up and as such should not be used to determine
+      startup-time-us.
diff --git a/dts/bindings/clock/nordic,nrf53-hfxo.yaml b/dts/bindings/clock/nordic,nrf53-hfxo.yaml
@@ -11,6 +11,20 @@ properties:
   clock-frequency:
     const: 32000000
 
+  startup-time-us:
+    type: int
+    required: true
+    description: |
+      Startup time in microseconds.
+
+      The value can be obtained by first measuring the time between
+      TASKS_HFCLKSTART and EVENTS_HFCLKSTARTED. Then multiply
+      the value by 2 to account for temperature and supply variations.
+
+      Note that the startup time will be longer usual on the first
+      power-up and as such should not be used to determine
+      startup-time-us.
+
   load-capacitors:
     type: string
     enum:

diff --git a/dts/bindings/clock/nordic,nrf-hfxo.yaml → dts/bindings/clock/nordic,nrf54l-hfxo.yaml b/dts/bindings/clock/nordic,nrf-hfxo.yaml → dts/bindings/clock/nordic,nrf54l-hfxo.yaml
@@ -1,16 +1,30 @@
 # Copyright (c) 2024 Nordic Semiconductor ASA
 # SPDX-License-Identifier: Apache-2.0
 
-description: Nordic nRF high-frequency crystal oscillator
+description: Nordic nRF high-frequency crystal oscillator (nRF54L series)
 
-compatible: "nordic,nrf-hfxo"
+compatible: "nordic,nrf54l-hfxo"
 
 include: fixed-clock.yaml
 
 properties:
   clock-frequency:
     const: 32000000
 
+  startup-time-us:
+    type: int
+    required: true
+    description: |
+      Startup time in microseconds.
+
+      The value can be obtained by first measuring the time between
+      TASKS_XOSTART and EVENTS_XOTUNED. Then multiply the value by 2 to
+      account for temperature and supply variations.
+
+      Note that the startup time will be longer usual on the first
+      power-up and as such should not be used to determine
+      startup-time-us.
+
   load-capacitors:
     type: string
     enum:

diff --git a/dts/bindings/clock/nordic,nrf-lfxo.yaml → dts/bindings/clock/nordic,nrf54l-lfxo.yaml b/dts/bindings/clock/nordic,nrf-lfxo.yaml → dts/bindings/clock/nordic,nrf54l-lfxo.yaml
@@ -1,9 +1,9 @@
 # Copyright (c) 2024 Nordic Semiconductor ASA
 # SPDX-License-Identifier: Apache-2.0
 
-description: Nordic nRF low-frequency crystal oscillator
+description: Nordic nRF low-frequency crystal oscillator (nRF54L series)
 
-compatible: "nordic,nrf-lfxo"
+compatible: "nordic,nrf54l-lfxo"
 
 include: fixed-clock.yaml
 

diff --git a/dts/common/nordic/nrf54l09.dtsi b/dts/common/nordic/nrf54l09.dtsi
@@ -56,15 +56,16 @@
 		};
 
 		lfxo: lfxo {
-			compatible = "nordic,nrf-lfxo";
+			compatible = "nordic,nrf54l-lfxo";
 			#clock-cells = <0>;
 			clock-frequency = <32768>;
 		};
 
 		hfxo: hfxo {
-			compatible = "nordic,nrf-hfxo";
+			compatible = "nordic,nrf54l-hfxo";
 			#clock-cells = <0>;
 			clock-frequency = <DT_FREQ_M(32)>;
+			startup-time-us = <1650>;
 		};
 
 		hfpll: hfpll {

diff --git a/dts/common/nordic/nrf54l20.dtsi b/dts/common/nordic/nrf54l20.dtsi
@@ -61,15 +61,16 @@
 		};
 
 		lfxo: lfxo {
-			compatible = "nordic,nrf-lfxo";
+			compatible = "nordic,nrf54l-lfxo";
 			#clock-cells = <0>;
 			clock-frequency = <32768>;
 		};
 
 		hfxo: hfxo {
-			compatible = "nordic,nrf-hfxo";
+			compatible = "nordic,nrf54l-hfxo";
 			#clock-cells = <0>;
 			clock-frequency = <DT_FREQ_M(32)>;
+			startup-time-us = <1650>;
 		};
 
 		hfpll: hfpll {

diff --git a/dts/common/nordic/nrf54l_05_10_15.dtsi b/dts/common/nordic/nrf54l_05_10_15.dtsi
@@ -56,15 +56,16 @@
 		};
 
 		lfxo: lfxo {
-			compatible = "nordic,nrf-lfxo";
+			compatible = "nordic,nrf54l-lfxo";
 			#clock-cells = <0>;
 			clock-frequency = <32768>;
 		};
 
 		hfxo: hfxo {
-			compatible = "nordic,nrf-hfxo";
+			compatible = "nordic,nrf54l-hfxo";
 			#clock-cells = <0>;
 			clock-frequency = <DT_FREQ_M(32)>;
+			startup-time-us = <1650>;
 		};
 
 		hfpll: hfpll {

diff --git a/include/zephyr/drivers/clock_control/nrf_clock_control.h b/include/zephyr/drivers/clock_control/nrf_clock_control.h
@@ -162,6 +162,13 @@ void z_nrf_clock_bt_ctlr_hf_request(void);
  */
 void z_nrf_clock_bt_ctlr_hf_release(void);
 
+/**
+ * @brief Get clock startup time
+ *
+ * @retval HFCLK startup time in microseconds
+ */
+uint32_t z_nrf_clock_bt_ctlr_hf_get_startup_time_us(void);
+
 #endif /* defined(CONFIG_CLOCK_CONTROL_NRF) */
 
 

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
@@ -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)