dts: Add DT for brd mimxrt685_evk/mimxrt685s/hifi4

Add DT for mimxrt685_evk/mimxrt685s/hifi4 (i.MX RT685's HiFi 4 DSP
core).

Signed-off-by: Vit Stanicek <[email protected]>

Author: VitekST

boards/nxp/mimxrt685_evk/mimxrt685_evk_mimxrt685s_hifi4.dts

@@ -0,0 +1,117 @@
+/*
+ * Copyright 2025 NXP
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+/dts-v1/;
+
+#include <nxp/nxp_rt685_hifi4.dtsi>
+#include <zephyr/dt-bindings/gpio/gpio.h>
+
+#include "mimxrt685_evk-pinctrl.dtsi"
+
+/ {
+	model = "NXP MIMXRT685-EVK board, HiFi 4 DSP domain";
+	compatible = "nxp,mimxrt685";
+
+	chosen {
+		zephyr,console = &flexcomm0;
+		zephyr,shell-uart = &flexcomm0;
+	};
+
+	aliases {
+		led0 = &green_led;
+		led1 = &blue_led;
+		led2 = &red_led;
+		sw0 = &user_button_1;
+		mbox = &mbox;
+	};
+
+	leds: leds {
+		compatible = "gpio-leds";
+
+		green_led: led_1 {
+			gpios = <&gpio0 14 0>;
+			label = "User LED_GREEN";
+		};
+
+		blue_led: led_2 {
+			gpios = <&gpio0 26 0>;
+			label = "User LED_BLUE";
+		};
+
+		red_led: led_3 {
+			gpios = <&gpio0 31 0>;
+			label = "User LED_RED";
+		};
+	};
+
+	gpio_keys {
+		compatible = "gpio-keys";
+
+		user_button_1: button_0 {
+			label = "User SW1";
+			gpios = <&gpio1 1 GPIO_ACTIVE_LOW>;
+			zephyr,code = <INPUT_KEY_0>;
+		};
+	};
+};
+
+&gpio0 {
+	status = "okay";
+};
+
+&dma1 {
+	status = "okay";
+};
+
+&flexcomm0 {
+	compatible = "nxp,lpc-usart";
+	pinctrl-0 = <&pinmux_flexcomm0_usart>;
+	pinctrl-names = "default";
+	current-speed = <115200>;
+	status = "okay";
+};
+
+/* I2S receive channel */
+i2s0: &flexcomm1 {
+	status = "okay";
+	compatible = "nxp,lpc-i2s";
+	#address-cells = <1>;
+	#size-cells = <0>;
+	dmas = <&dma1 2>;
+	dma-names = "rx";
+	pinctrl-0 = <&pinmux_flexcomm1_i2s>;
+	pinctrl-names = "default";
+};
+
+/* I2S transmit channel */
+i2s1: &flexcomm3 {
+	status = "okay";
+	compatible = "nxp,lpc-i2s";
+	#address-cells = <1>;
+	#size-cells = <0>;
+	dmas = <&dma1 7>;
+	dma-names = "tx";
+	pinctrl-0 = <&pinmux_flexcomm3_i2s>;
+	pinctrl-names = "default";
+};
+
+&i3c0 {
+	status = "okay";
+	pinctrl-0 = <&pinmux_i3c>;
+	pinctrl-names = "default";
+
+	audio_codec: wm8904@1a0000000000000000 {
+		compatible = "wolfson,wm8904";
+		reg = <0x1a 0 0>;
+		clock-source = "MCLK";
+
+		clocks = <&clkctl0 MCUX_AUDIO_MCLK>;
+		clock-names = "mclk";
+	};
+};
+
+&mbox {
+	status = "okay";
+};