boards: ambiq: enable the ITM in Ambiq boards

This commit defines the default pinctrl of ITM for Apollo3 and
Apollo4 EVB. Also configures the default SWO frequency.

Signed-off-by: Aaron Ye <[email protected]>

Author: aaronyegx

boards/ambiq/apollo3_evb/Kconfig.defconfig

@@ -0,0 +1,11 @@
+# SPDX-License-Identifier: Apache-2.0
+#
+# Copyright (c) 2024 Ambiq Micro Inc. <www.ambiq.com>
+
+if BOARD_APOLLO3_EVB
+
+config LOG_BACKEND_SWO_FREQ_HZ
+	default 1000000
+	depends on LOG_BACKEND_SWO
+
+endif # BOARD_APOLLO3_EVB

boards/ambiq/apollo3_evb/apollo3_evb-pinctrl.dtsi

@@ -17,6 +17,11 @@
 			input-enable;
 		};
 	};
+	itm_default: itm_default {
+		group1 {
+			pinmux = <SWO_P41>;
+		};
+	};
 	i2c0_default: i2c0_default {
 		group1 {
 			pinmux = <M0SCL_P5>, <M0SDAWIR3_P6>;

boards/ambiq/apollo3_evb/apollo3_evb.dts

@@ -98,6 +98,12 @@
 	status = "okay";
 };
 
+&itm {
+	pinctrl-0 = <&itm_default>;
+	pinctrl-names = "default";
+	status = "okay";
+};
+
 &wdt0 {
 	status = "okay";
 };

boards/ambiq/apollo3p_evb/Kconfig.defconfig

@@ -0,0 +1,11 @@
+# SPDX-License-Identifier: Apache-2.0
+#
+# Copyright (c) 2024 Ambiq Micro Inc. <www.ambiq.com>
+
+if BOARD_APOLLO3P_EVB
+
+config LOG_BACKEND_SWO_FREQ_HZ
+	default 1000000
+	depends on LOG_BACKEND_SWO
+
+endif # BOARD_APOLLO3P_EVB

boards/ambiq/apollo3p_evb/apollo3p_evb-pinctrl.dtsi

@@ -17,6 +17,11 @@
 			input-enable;
 		};
 	};
+	itm_default: itm_default {
+		group1 {
+			pinmux = <SWO_P41>;
+		};
+	};
 	i2c0_default: i2c0_default {
 		group1 {
 			pinmux = <M0SCL_P5>, <M0SDAWIR3_P6>;

boards/ambiq/apollo3p_evb/apollo3p_evb.dts

@@ -98,6 +98,12 @@
 	status = "okay";
 };
 
+&itm {
+	pinctrl-0 = <&itm_default>;
+	pinctrl-names = "default";
+	status = "okay";
+};
+
 &wdt0 {
 	status = "okay";
 };

boards/ambiq/apollo4p_blue_kxr_evb/Kconfig.defconfig

@@ -4,6 +4,10 @@
 
 if BOARD_APOLLO4P_BLUE_KXR_EVB
 
+config LOG_BACKEND_SWO_FREQ_HZ
+	default 1000000
+	depends on LOG_BACKEND_SWO
+
 if BT
 
 config MAIN_STACK_SIZE

boards/ambiq/apollo4p_blue_kxr_evb/apollo4p_blue_kxr_evb-pinctrl.dtsi

@@ -16,6 +16,11 @@
 			input-enable;
 		};
 	};
+	itm_default: itm_default {
+		group1 {
+			pinmux = <SWO_P28>;
+		};
+	};
 	i2c0_default: i2c0_default {
 		group1 {
 			pinmux = <M0SCL_P5>, <M0SDAWIR3_P6>;

boards/ambiq/apollo4p_blue_kxr_evb/apollo4p_blue_kxr_evb.dts

@@ -69,6 +69,12 @@
 	status = "okay";
 };
 
+&itm {
+	pinctrl-0 = <&itm_default>;
+	pinctrl-names = "default";
+	status = "okay";
+};
+
 &counter0 {
 	status = "okay";
 };

boards/ambiq/apollo4p_evb/Kconfig.defconfig

@@ -0,0 +1,11 @@
+# SPDX-License-Identifier: Apache-2.0
+#
+# Copyright (c) 2024 Ambiq Micro Inc. <www.ambiq.com>
+
+if BOARD_APOLLO4P_EVB
+
+config LOG_BACKEND_SWO_FREQ_HZ
+	default 1000000
+	depends on LOG_BACKEND_SWO
+
+endif # BOARD_APOLLO4P_EVB