boards: nxp: imx943_evk: add NETC switch support for M33

Added NETC switch support for M33.

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

Author: yangbolu1991

boards/nxp/imx943_evk/doc/index.rst

@@ -65,10 +65,13 @@ CPU's UART1 for Cortex-A55, and UART8 for Cortex-M33.
 Ethernet
 --------
 
-NETC driver supports to manage the Physical Station Interface (PSI).
+NETC driver supports to manage the Physical Station Interface (PSI), and TSN switch.
 The ENET0, ENETC1, ENETC2 ports could be enabled for M33 by west build option
 ``-DEXTRA_DTC_OVERLAY_FILE=enetc.overlay``.
 
+The two switch ports could be enabled for M33 by west build option.
+``-DEXTRA_DTC_OVERLAY_FILE=netc-switch.overlay``.
+
 Programming and Debugging (A55)
 *******************************
 

boards/nxp/imx943_evk/dts/netc-switch.overlay

@@ -0,0 +1,39 @@
+/*
+ * Copyright 2025 NXP
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+&emdio {
+	status = "okay";
+
+	phy0: phy@2 {
+		status = "okay";
+	};
+
+	phy1: phy@3 {
+		status = "okay";
+	};
+};
+
+/* Internal port */
+&enetc_psi3 {
+	status = "okay";
+};
+
+&netc_switch {
+	status = "okay";
+
+	switch_port0: switch_port@0 {
+		status = "okay";
+	};
+
+	switch_port1: switch_port@1 {
+		status = "okay";
+	};
+
+	/* Internal port */
+	switch_port3: switch_port@3 {
+		status = "okay";
+	};
+};

boards/nxp/imx943_evk/imx943_evk_mimx94398_m33.dts

@@ -28,15 +28,15 @@
 	pinctrl-names = "default";
 	status = "disabled";
 
-	phy0: phy@f {
+	phy0: phy@2 {
 		compatible = "ethernet-phy";
-		reg = <0xf>;
+		reg = <0x2>;
 		status = "disabled";
 	};
 
-	phy1: phy@10 {
+	phy1: phy@3 {
 		compatible = "ethernet-phy";
-		reg = <0x10>;
+		reg = <0x3>;
 		status = "disabled";
 	};
 
@@ -89,3 +89,27 @@
 	pinctrl-0 = <&lpuart8_default>;
 	pinctrl-names = "default";
 };
+
+&switch_port0 {
+	zephyr,random-mac-address;
+	pinctrl-0 = <&eth0_default>;
+	pinctrl-names = "default";
+	phy-handle = <&phy0>;
+	phy-connection-type = "mii";
+	status = "disabled";
+};
+
+&switch_port1 {
+	zephyr,random-mac-address;
+	pinctrl-0 = <&eth1_default>;
+	pinctrl-names = "default";
+	phy-handle = <&phy1>;
+	phy-connection-type = "mii";
+	status = "disabled";
+};
+
+/* Internal port */
+&switch_port3 {
+	zephyr,random-mac-address;
+	status = "disabled";
+};