1 files changed, 178 insertions, 0 deletions
diff --git a/target/linux/ramips/dts/mt7621_mikrotik_routerboard-750gr3.dts b/target/linux/ramips/dts/mt7621_mikrotik_routerboard-750gr3.dts
new file mode 100644
index 0000000000..3f37155f24
--- /dev/null
+++ b/target/linux/ramips/dts/mt7621_mikrotik_routerboard-750gr3.dts
@@ -0,0 +1,178 @@
+// SPDX-License-Identifier: GPL-2.0-or-later OR MIT
+/dts-v1/;
+
+#include "mt7621.dtsi"
+
+#include <dt-bindings/input/input.h>
+#include <dt-bindings/gpio/gpio.h>
+
+/ {
+	compatible = "mikrotik,routerboard-750gr3", "mediatek,mt7621-soc";
+	model = "MikroTik RouterBOARD 750Gr3";
+
+	aliases {
+		led-boot = &led_usr;
+		led-failsafe = &led_usr;
+		led-running = &led_usr;
+		led-upgrade = &led_usr;
+	};
+
+	chosen {
+		bootargs = "console=ttyS0,115200";
+	};
+
+	leds {
+		compatible = "gpio-leds";
+
+		pwr {
+			label = "routerboard-750gr3:blue:pwr";
+			gpios = <&gpio 16 GPIO_ACTIVE_HIGH>;
+			default-state = "on";
+		};
+
+		led_usr: usr {
+			label = "routerboard-750gr3:green:usr";
+			gpios = <&gpio 0 GPIO_ACTIVE_HIGH>;
+		};
+	};
+
+	keys {
+		compatible = "gpio-keys";
+
+		mode {
+			label = "mode";
+			gpios = <&gpio 13 GPIO_ACTIVE_LOW>;
+			linux,code = <BTN_0>;
+		};
+
+		reset {
+			label = "reset";
+			gpios = <&gpio 18 GPIO_ACTIVE_LOW>;
+			linux,code = <KEY_RESTART>;
+		};
+	};
+
+	beeper {
+		compatible = "gpio-beeper";
+		gpios = <&gpio 15 GPIO_ACTIVE_HIGH>;
+	};
+
+	gpio_export {
+		compatible = "gpio-export";
+		#size-cells = <0>;
+
+		usb_power {
+			gpio-export,name = "usb_power";
+			gpio-export,output = <1>;
+			gpios = <&gpio 12 GPIO_ACTIVE_HIGH>;
+		};
+	};
+};
+
+&spi0 {
+	status = "okay";
+
+	flash@0 {
+		compatible = "jedec,spi-nor";
+		reg = <0>;
+		spi-max-frequency = <20000000>;
+
+		partitions {
+			compatible = "fixed-partitions";
+			#address-cells = <1>;
+			#size-cells = <1>;
+
+			partition@0 {
+				label = "RouterBoot";
+				reg = <0x0 0x40000>;
+				read-only;
+				compatible = "fixed-partitions";
+				#address-cells = <1>;
+				#size-cells = <1>;
+
+				partition@0 {
+					label = "bootloader1";
+					reg = <0x0 0xf000>;
+					read-only;
+				};
+
+				hard_config: partition@f000 {
+					label = "hard_config";
+					reg = <0xf000 0x1000>;
+					read-only;
+				};
+
+				partition@10000 {
+					label = "bootloader2";
+					reg = <0x10000 0xf000>;
+					read-only;
+				};
+
+				partition@20000 {
+					label = "soft_config";
+					reg = <0x20000 0x1000>;
+				};
+
+				partition@30000 {
+					label = "bios";
+					reg = <0x30000 0x1000>;
+					read-only;
+				};
+			};
+
+			partition@40000 {
+				compatible = "mikrotik,minor";
+				label = "firmware";
+				reg = <0x040000 0xfc0000>;
+			};
+		};
+	};
+};
+
+&gmac0 {
+	mtd-mac-address = <&hard_config 0x0010>;
+	mtd-mac-address-increment = <1>;
+};
+
+&switch0 {
+	ports {
+		port@0 {
+			status = "okay";
+			label = "wan";
+			mtd-mac-address = <&hard_config 0x0010>;
+			mtd-mac-address-increment = <2>;
+		};
+
+		port@1 {
+			status = "okay";
+			label = "lan2";
+		};
+
+		port@2 {
+			status = "okay";
+			label = "lan3";
+		};
+
+		port@3 {
+			status = "okay";
+			label = "lan4";
+		};
+
+		port@4 {
+			status = "okay";
+			label = "lan5";
+		};
+	};
+};
+
+&state_default {
+	gpio {
+		/* via gpio7 (uart3 group) the PoE status can be read */
+		groups = "uart2", "uart3", "jtag", "wdt";
+		function = "gpio";
+	};
+};
+
+&sdhci {
+	status = "okay";
+};