boards: silabs: Add ITM configuration

asmellby · kartben · commit 90dbc8dfd177 · 2025-04-07T08:54:38.000+02:00
Configure pinout and frequency for Serial Wire Output to enable use
of the SWO logging backend on Silicon Labs dev kits.

Signed-off-by: Aksel Skauge Mellbye &lt;aksel.mellbye@silabs.com&gt;
diff --git a/boards/silabs/dev_kits/sltb010a/Kconfig.defconfig b/boards/silabs/dev_kits/sltb010a/Kconfig.defconfig
@@ -1,6 +1,11 @@
 # Copyright (c) 2023 Antmicro <www.antmicro.com>
 # SPDX-License-Identifier: Apache-2.0
 
+if BOARD_SLTB010A
+
+configdefault LOG_BACKEND_SWO_FREQ_HZ
+	default 875000
+
 if SOC_GECKO_USE_RAIL
 
 config FPU
@@ -24,3 +29,5 @@ endif # BT
 
 config REGULATOR
 	default y if SI7210
+
+endif
diff --git a/boards/silabs/dev_kits/sltb010a/sltb010a-pinctrl.dtsi b/boards/silabs/dev_kits/sltb010a/sltb010a-pinctrl.dtsi
@@ -39,4 +39,12 @@
 			bias-pull-up;
 		};
 	};
+
+	itm_default: itm_default {
+		group0 {
+			pins = <GPIO_SWV_PA3>;
+			drive-push-pull;
+			output-high;
+		};
+	};
 };
diff --git a/boards/silabs/dev_kits/sltb010a/thunderboard.dtsi b/boards/silabs/dev_kits/sltb010a/thunderboard.dtsi
@@ -68,6 +68,12 @@
 	clock-frequency = <76800000>;
 };
 
+&itm {
+	pinctrl-0 = <&itm_default>;
+	pinctrl-names = "default";
+	swo-ref-frequency = <DT_FREQ_K(76800)>;
+};
+
 &pstate_em3 {
 	status = "disabled";
 };
diff --git a/boards/silabs/dev_kits/xg24_dk2601b/Kconfig.defconfig b/boards/silabs/dev_kits/xg24_dk2601b/Kconfig.defconfig
@@ -3,6 +3,9 @@
 
 if BOARD_XG24_DK2601B
 
+configdefault LOG_BACKEND_SWO_FREQ_HZ
+	default 875000
+
 if SOC_GECKO_USE_RAIL
 
 config FPU
diff --git a/boards/silabs/dev_kits/xg24_dk2601b/xg24_dk2601b-pinctrl.dtsi b/boards/silabs/dev_kits/xg24_dk2601b/xg24_dk2601b-pinctrl.dtsi
@@ -40,4 +40,12 @@
 			bias-pull-up;
 		};
 	};
+
+	itm_default: itm_default {
+		group0 {
+			pins = <GPIO_SWV_PA3>;
+			drive-push-pull;
+			output-high;
+		};
+	};
 };
diff --git a/boards/silabs/dev_kits/xg24_dk2601b/xg24_dk2601b.dts b/boards/silabs/dev_kits/xg24_dk2601b/xg24_dk2601b.dts
@@ -75,6 +75,12 @@
 	clock-frequency = <78000000>;
 };
 
+&itm {
+	pinctrl-0 = <&itm_default>;
+	pinctrl-names = "default";
+	swo-ref-frequency = <DT_FREQ_M(78)>;
+};
+
 &hfxo {
 	status = "okay";
 	ctune = <140>;
diff --git a/boards/silabs/dev_kits/xg24_ek2703a/Kconfig.defconfig b/boards/silabs/dev_kits/xg24_ek2703a/Kconfig.defconfig
@@ -3,6 +3,9 @@
 
 if BOARD_XG24_EK2703A
 
+configdefault LOG_BACKEND_SWO_FREQ_HZ
+	default 875000
+
 config CMU_HFXO_FREQ
 	default 39000000
 
diff --git a/boards/silabs/dev_kits/xg24_ek2703a/xg24_ek2703a-pinctrl.dtsi b/boards/silabs/dev_kits/xg24_ek2703a/xg24_ek2703a-pinctrl.dtsi
@@ -27,4 +27,12 @@
 			bias-pull-up;
 		};
 	};
+
+	itm_default: itm_default {
+		group0 {
+			pins = <GPIO_SWV_PA3>;
+			drive-push-pull;
+			output-high;
+		};
+	};
 };
diff --git a/boards/silabs/dev_kits/xg24_ek2703a/xg24_ek2703a.dts b/boards/silabs/dev_kits/xg24_ek2703a/xg24_ek2703a.dts
@@ -64,6 +64,12 @@
 	clock-frequency = <78000000>;
 };
 
+&itm {
+	pinctrl-0 = <&itm_default>;
+	pinctrl-names = "default";
+	swo-ref-frequency = <DT_FREQ_M(78)>;
+};
+
 &hfxo {
 	status = "okay";
 	ctune = <140>;
diff --git a/boards/silabs/dev_kits/xg27_dk2602a/Kconfig.defconfig b/boards/silabs/dev_kits/xg27_dk2602a/Kconfig.defconfig
@@ -1,6 +1,11 @@
 # Copyright (c) 2023 Antmicro <www.antmicro.com>
 # SPDX-License-Identifier: Apache-2.0
 
+if BOARD_XG27_DK2602A
+
+configdefault LOG_BACKEND_SWO_FREQ_HZ
+	default 875000
+
 if SOC_GECKO_USE_RAIL
 
 config FPU
@@ -24,3 +29,5 @@ endif # BT
 
 config REGULATOR
 	default y if SI7210
+
+endif
diff --git a/boards/silabs/dev_kits/xg27_dk2602a/thunderboard.dtsi b/boards/silabs/dev_kits/xg27_dk2602a/thunderboard.dtsi
@@ -68,6 +68,12 @@
 	clock-frequency = <76800000>;
 };
 
+&itm {
+	pinctrl-0 = <&itm_default>;
+	pinctrl-names = "default";
+	swo-ref-frequency = <DT_FREQ_K(76800)>;
+};
+
 &pstate_em3 {
 	status = "disabled";
 };
diff --git a/boards/silabs/dev_kits/xg27_dk2602a/xg27_dk2602a-pinctrl.dtsi b/boards/silabs/dev_kits/xg27_dk2602a/xg27_dk2602a-pinctrl.dtsi
@@ -39,4 +39,12 @@
 			bias-pull-up;
 		};
 	};
+
+	itm_default: itm_default {
+		group0 {
+			pins = <GPIO_SWV_PA3>;
+			drive-push-pull;
+			output-high;
+		};
+	};
 };
diff --git a/boards/silabs/radio_boards/xg23_rb4210a/xg23_rb4210a-pinctrl.dtsi b/boards/silabs/radio_boards/xg23_rb4210a/xg23_rb4210a-pinctrl.dtsi
@@ -40,4 +40,12 @@
 			bias-pull-up;
 		};
 	};
+
+	itm_default: itm_default {
+		group0 {
+			pins = <GPIO_SWV_PA3>;
+			drive-push-pull;
+			output-high;
+		};
+	};
 };
diff --git a/boards/silabs/radio_boards/xg23_rb4210a/xg23_rb4210a.dts b/boards/silabs/radio_boards/xg23_rb4210a/xg23_rb4210a.dts
@@ -71,6 +71,12 @@
 	clock-frequency = <78000000>;
 };
 
+&itm {
+	pinctrl-0 = <&itm_default>;
+	pinctrl-names = "default";
+	swo-ref-frequency = <DT_FREQ_M(78)>;
+};
+
 &pstate_em3 {
 	status = "disabled";
 };
diff --git a/boards/silabs/radio_boards/xg24_rb4187c/xg24_rb4187c-pinctrl.dtsi b/boards/silabs/radio_boards/xg24_rb4187c/xg24_rb4187c-pinctrl.dtsi
@@ -41,4 +41,12 @@
 			bias-pull-up;
 		};
 	};
+
+	itm_default: itm_default {
+		group0 {
+			pins = <GPIO_SWV_PA3>;
+			drive-push-pull;
+			output-high;
+		};
+	};
 };
diff --git a/boards/silabs/radio_boards/xg24_rb4187c/xg24_rb4187c.dts b/boards/silabs/radio_boards/xg24_rb4187c/xg24_rb4187c.dts
@@ -73,6 +73,12 @@
 	clock-frequency = <78000000>;
 };
 
+&itm {
+	pinctrl-0 = <&itm_default>;
+	pinctrl-names = "default";
+	swo-ref-frequency = <DT_FREQ_M(78)>;
+};
+
 &pstate_em3 {
 	status = "disabled";
 };
diff --git a/boards/silabs/radio_boards/xg29_rb4412a/xg29_rb4412a-pinctrl.dtsi b/boards/silabs/radio_boards/xg29_rb4412a/xg29_rb4412a-pinctrl.dtsi
@@ -40,4 +40,12 @@
 			bias-pull-up;
 		};
 	};
+
+	itm_default: itm_default {
+		group0 {
+			pins = <GPIO_SWV_PA3>;
+			drive-push-pull;
+			output-high;
+		};
+	};
 };
diff --git a/boards/silabs/radio_boards/xg29_rb4412a/xg29_rb4412a.dts b/boards/silabs/radio_boards/xg29_rb4412a/xg29_rb4412a.dts
@@ -75,6 +75,12 @@
 	clock-frequency = <76800000>;
 };
 
+&itm {
+	pinctrl-0 = <&itm_default>;
+	pinctrl-names = "default";
+	swo-ref-frequency = <DT_FREQ_K(76800)>;
+};
+
 &hfxo {
 	status = "okay";
 	ctune = <140>;
