boards: nxp: imx943_evk: add basic support for M33 platform

Added basic support for M33 platform.

Signed-off-by: Yangbo Lu <yangbo.lu@nxp.com>

boards/nxp/imx943_evk/Kconfig.imx943_evk

@@ -3,4 +3,5 @@
 
 config BOARD_IMX943_EVK
 	select SOC_MIMX94398_A55 if BOARD_IMX943_EVK_MIMX94398_A55
+	select SOC_MIMX94398_M33 if BOARD_IMX943_EVK_MIMX94398_M33
 	select SOC_PART_NUMBER_MIMX94398AVKM

boards/nxp/imx943_evk/imx943_evk-pinctrl.dtsi

@@ -15,4 +15,14 @@
 			drive-strength = "x4";
 		};
 	};
+
+	lpuart8_default: lpuart8_default {
+		group0 {
+			pinmux = <&iomuxc_dap_tclk_swclk_lpuart_rx_lpuart8_rx>,
+				<&iomuxc_dap_tms_swdio_lpuart_tx_lpuart8_tx>;
+			bias-pull-up;
+			slew-rate = "slightly_fast";
+			drive-strength = "x4";
+		};
+	};
 };

boards/nxp/imx943_evk/imx943_evk_mimx94398_m33.dts

@@ -0,0 +1,31 @@
+/*
+ * Copyright 2025 NXP
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+/dts-v1/;
+
+#include <nxp/nxp_imx943_m33.dtsi>
+#include "imx943_evk-pinctrl.dtsi"
+
+/ {
+	model = "NXP i.MX943 EVK board";
+	compatible = "nxp,imx943_evk";
+
+	chosen {
+		/* TCM */
+		zephyr,flash = &itcm;
+		zephyr,sram = &dtcm;
+
+		zephyr,console = &lpuart8;
+		zephyr,shell-uart = &lpuart8;
+	};
+};
+
+&lpuart8 {
+	status = "okay";
+	current-speed = <115200>;
+	pinctrl-0 = <&lpuart8_default>;
+	pinctrl-names = "default";
+};

boards/nxp/imx943_evk/imx943_evk_mimx94398_m33.yaml

@@ -0,0 +1,18 @@
+#
+# Copyright 2025 NXP
+#
+# SPDX-License-Identifier: Apache-2.0
+#
+
+identifier: imx943_evk/mimx94398/m33
+name: NXP i.MX943 EVK M33
+type: mcu
+arch: arm
+ram: 256
+flash: 256
+toolchain:
+  - zephyr
+  - gnuarmemb
+supported:
+  - uart
+vendor: nxp

boards/nxp/imx943_evk/imx943_evk_mimx94398_m33_defconfig

@@ -0,0 +1,23 @@
+#
+# Copyright 2025 NXP
+#
+# SPDX-License-Identifier: Apache-2.0
+#
+
+# clock-related configurations
+CONFIG_CLOCK_CONTROL=y
+
+# serial interface-related configurations
+CONFIG_SERIAL=y
+CONFIG_UART_CONSOLE=y
+CONFIG_UART_INTERRUPT_DRIVEN=y
+CONFIG_CONSOLE=y
+
+# SCMI-related configurations
+CONFIG_MBOX=y
+CONFIG_MBOX_INIT_PRIORITY=0
+CONFIG_ARM_SCMI=y
+CONFIG_ARM_SCMI_NXP_VENDOR_EXTENSIONS=y
+
+# kernel-related configurations
+CONFIG_XIP=y