soc: silabs: siwx91x: define hardware sys clock from dts

Martinhoff-maker · Martinhoff-maker · commit 6a0f685c60ed · 2025-12-01T17:22:42.000+01:00
This patch introduce configuration of the symbol
'SYS_CLOCK_HW_CYCLES_PER_SEC' with dts entry rather than a hardcoded
value.

Signed-off-by: Martin Hoff &lt;martin.hoff@silabs.com&gt;
diff --git a/boards/silabs/dev_kits/siwx917_dk2605a/siwx917_dk2605a.dts b/boards/silabs/dev_kits/siwx917_dk2605a/siwx917_dk2605a.dts
@@ -85,6 +85,10 @@
 	};
 };
 
+&cpu0 {
+	clock-frequency = <180000000>;
+};
+
 &ulpuart {
 	pinctrl-0 = <&ulpuart_default>;
 	pinctrl-names = "default";
diff --git a/boards/silabs/dev_kits/siwx917_dk2605a/siwx917_dk2605a_defconfig b/boards/silabs/dev_kits/siwx917_dk2605a/siwx917_dk2605a_defconfig
@@ -1,7 +1,6 @@
 # Copyright (c) 2025 Silicon Laboratories Inc.
 # SPDX-License-Identifier: Apache-2.0
 
-CONFIG_SYS_CLOCK_HW_CYCLES_PER_SEC=180000000
 CONFIG_USE_DT_CODE_PARTITION=y
 CONFIG_CONSOLE=y
 CONFIG_UART_CONSOLE=y
diff --git a/boards/silabs/radio_boards/siwx917_rb4338a/siwx917_rb4338a.dts b/boards/silabs/radio_boards/siwx917_rb4338a/siwx917_rb4338a.dts
@@ -77,6 +77,10 @@
 	};
 };
 
+&cpu0 {
+	clock-frequency = <180000000>;
+};
+
 &ulpuart {
 	pinctrl-0 = <&ulpuart_default>;
 	pinctrl-names = "default";
diff --git a/boards/silabs/radio_boards/siwx917_rb4338a/siwx917_rb4338a_defconfig b/boards/silabs/radio_boards/siwx917_rb4338a/siwx917_rb4338a_defconfig
@@ -1,7 +1,6 @@
 # Copyright (c) 2024 Silicon Laboratories Inc.
 # SPDX-License-Identifier: Apache-2.0
 
-CONFIG_SYS_CLOCK_HW_CYCLES_PER_SEC=180000000
 CONFIG_USE_DT_CODE_PARTITION=y
 CONFIG_CONSOLE=y
 CONFIG_UART_CONSOLE=y
diff --git a/boards/silabs/radio_boards/siwx917_rb4342a/siwx917_rb4342a.dts b/boards/silabs/radio_boards/siwx917_rb4342a/siwx917_rb4342a.dts
@@ -78,6 +78,10 @@
 	};
 };
 
+&cpu0 {
+	clock-frequency = <180000000>;
+};
+
 &ulpuart {
 	pinctrl-0 = <&ulpuart_default>;
 	pinctrl-names = "default";
diff --git a/boards/silabs/radio_boards/siwx917_rb4342a/siwx917_rb4342a_defconfig b/boards/silabs/radio_boards/siwx917_rb4342a/siwx917_rb4342a_defconfig
@@ -1,7 +1,6 @@
 # Copyright (c) 2025 Silicon Laboratories Inc.
 # SPDX-License-Identifier: Apache-2.0
 
-CONFIG_SYS_CLOCK_HW_CYCLES_PER_SEC=180000000
 CONFIG_USE_DT_CODE_PARTITION=y
 CONFIG_CONSOLE=y
 CONFIG_UART_CONSOLE=y
diff --git a/soc/silabs/silabs_siwx91x/Kconfig.defconfig b/soc/silabs/silabs_siwx91x/Kconfig.defconfig
@@ -6,6 +6,10 @@ if SOC_FAMILY_SILABS_SIWX91X
 configdefault CORTEX_M_SYSTICK
 	default n if SILABS_SLEEPTIMER_TIMER
 
+configdefault SYS_CLOCK_HW_CYCLES_PER_SEC
+	default $(dt_node_int_prop_int,/cpus/cpu@0,clock-frequency) if CORTEX_M_SYSTICK
+	default 32768
+
 configdefault SYS_CLOCK_TICKS_PER_SEC
 	default 128 if !TICKLESS_KERNEL && SILABS_SLEEPTIMER_TIMER
 	default 1024 if SILABS_SLEEPTIMER_TIMER
