MIPS: dts: loongson: Add LSGZ_1B_DEV board

Add a device tree for LSGZ_1B_DEV board.

Signed-off-by: Keguang Zhang <keguang.zhang@gmail.com>
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>

Author: kelvincheung

arch/mips/boot/dts/loongson/Makefile

@@ -7,3 +7,4 @@ dtb-$(CONFIG_MACH_LOONGSON64)	+= loongson64g_4core_ls7a.dtb
 dtb-$(CONFIG_MACH_LOONGSON64)	+= loongson64v_4core_virtio.dtb
 
 dtb-$(CONFIG_MACH_LOONGSON32)	+= ls1b-demo.dtb
+dtb-$(CONFIG_MACH_LOONGSON32)	+= lsgz_1b_dev.dtb

arch/mips/boot/dts/loongson/lsgz_1b_dev.dts

@@ -0,0 +1,162 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (c) 2023-2025 Keguang Zhang <keguang.zhang@gmail.com>
+ */
+
+/dts-v1/;
+
+#include <dt-bindings/gpio/gpio.h>
+
+#include "loongson1b.dtsi"
+
+/ {
+	compatible = "loongson,lsgz-1b-dev", "loongson,ls1b";
+	model = "LSGZ_1B_DEV Board";
+
+	memory@0 {
+		device_type = "memory";
+		reg = <0x0 0x4000000>;
+	};
+
+	aliases {
+		ethernet0 = &gmac0;
+		ethernet1 = &gmac1;
+		gpio0 = &gpio0;
+		gpio1 = &gpio1;
+		serial0 = &uart2;
+		serial1 = &uart3;
+	};
+
+	chosen {
+		stdout-path = "serial0:115200n8";
+	};
+
+	leds {
+		compatible = "gpio-leds";
+
+		led9 {
+			label = "led9";
+			gpios = <&gpio1 6 GPIO_ACTIVE_LOW>;
+			linux,default-trigger = "heartbeat";
+		};
+
+		led6 {
+			label = "led6";
+			gpios = <&gpio1 7 GPIO_ACTIVE_LOW>;
+			linux,default-trigger = "nand-disk";
+		};
+	};
+
+	codec: audio-codec {
+		compatible = "realtek,alc203";
+		#sound-dai-cells = <0>;
+	};
+
+	sound {
+		compatible = "simple-audio-card";
+		simple-audio-card,name = "ls1b-alc655";
+		simple-audio-card,format = "ac97";
+		simple-audio-card,widgets =
+			"Speaker", "Line Out Jack",
+			"Line", "Line In Jack",
+			"Microphone", "Microphone Jack";
+		simple-audio-card,routing =
+			"Line Out Jack", "TX",
+			"RX", "Line In Jack",
+			"RX", "Microphone Jack";
+
+		simple-audio-card,cpu {
+			sound-dai = <&ac97>;
+		};
+
+		simple-audio-card,codec {
+			sound-dai = <&codec>;
+		};
+	};
+};
+
+&xtal {
+	clock-frequency = <33000000>;
+};
+
+&gmac0 {
+	phy-handle = <&phy0>;
+	phy-mode = "mii";
+	status = "okay";
+
+	mdio {
+		#address-cells = <1>;
+		#size-cells = <0>;
+		compatible = "snps,dwmac-mdio";
+
+		phy0: ethernet-phy@0 {
+			reg = <0x0>;
+		};
+	};
+};
+
+&gmac1 {
+	phy-handle = <&phy1>;
+	phy-mode = "mii";
+	status = "okay";
+
+	mdio {
+		compatible = "snps,dwmac-mdio";
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		phy1: ethernet-phy@0 {
+			reg = <0x0>;
+		};
+	};
+};
+
+&nand {
+	status = "okay";
+
+	nand@0 {
+		partitions {
+			compatible = "fixed-partitions";
+			#address-cells = <1>;
+			#size-cells = <1>;
+
+			partition@0 {
+				label = "kernel";
+				reg = <0x0 0x1000000>;
+			};
+
+			partition@1000000 {
+				label = "rootfs";
+				reg = <0x1000000 0x7000000>;
+			};
+		};
+	};
+};
+
+&ac97 {
+	status = "okay";
+};
+
+&ehci {
+	status = "okay";
+};
+
+&ohci {
+	status = "okay";
+};
+
+&rtc {
+	status = "okay";
+};
+
+&uart2 {
+	status = "okay";
+};
+
+&uart3 {
+	status = "okay";
+};
+
+&watchdog {
+	status = "okay";
+};