ramips: add support for YunCore G720

The YunCore G720 is a dual band 802.11ax router with 5 GbE ports.

Specs:
- SoC: MediaTek MT7621
- Ethernet: 5x GbE ports (built-in MT7530)
- Wireless 2.4GHz / 5GHz: MediaTek MT7915E
- RAM: 256MiB
- ROM: 16MiB (W25Q128)
- 1 Button (reset)
- 8 LEDs (1x system, 2x wifi, 5x switch ports)

Flash instructions:
The vendor firmware is based on OpenWrt, the sysupgrade image can be
flashed using the '-F' (force) option on the CLI.
Make sure not to keep settings when doing so.

Signed-off-by: Daniel Golle <daniel@makrotopia.org>

target/linux/ramips/dts/mt7621_yuncore_g720.dts

@@ -0,0 +1,188 @@
+#include <dt-bindings/gpio/gpio.h>
+#include <dt-bindings/input/input.h>
+#include <dt-bindings/leds/common.h>
+
+#include "mt7621.dtsi"
+
+/ {
+	compatible = "yuncore,g720", "mediatek,mt7621-soc";
+	model = "YunCore G720";
+
+	aliases {
+		label-mac-device = &wifi0;
+		led-boot = &led_sys_red;
+		led-failsafe = &led_sys_red;
+		led-running = &led_sys_red;
+		led-upgrade = &led_sys_red;
+	};
+
+	chosen {
+		bootargs = "console=ttyS0,115200";
+	};
+
+	leds {
+		compatible = "gpio-leds";
+
+		led_sys_red: led-sys {
+			color = <LED_COLOR_ID_RED>;
+			function = LED_FUNCTION_STATUS;
+			gpios = <&gpio 15 GPIO_ACTIVE_LOW>;
+		};
+	};
+
+	keys {
+		compatible = "gpio-keys";
+
+		reset {
+			label = "reset";
+			gpios = <&gpio 13 GPIO_ACTIVE_LOW>;
+			linux,code = <KEY_RESTART>;
+		};
+	};
+
+	watchdog {
+		compatible = "linux,wdt-gpio";
+		gpios = <&gpio 0 GPIO_ACTIVE_LOW>;
+		hw_algo = "toggle";
+		hw_margin_ms = <200>;
+		always-running;
+	};
+};
+
+&gpio {
+	s1 {
+		gpio-hog;
+		line-name = "s1";
+		gpios = <4 GPIO_ACTIVE_LOW>;
+		output-high;
+	};
+
+	s2 {
+		gpio-hog;
+		line-name = "s2";
+		gpios = <3 GPIO_ACTIVE_LOW>;
+		output-high;
+	};
+};
+
+&spi0 {
+	status = "okay";
+
+	flash@0 {
+		compatible = "w25q128", "jedec,spi-nor";
+		reg = <0>;
+		spi-max-frequency = <10000000>;
+
+		partitions {
+			compatible = "fixed-partitions";
+			#address-cells = <1>;
+			#size-cells = <1>;
+
+			partition@0 {
+				label = "u-boot";
+				reg = <0x0 0x30000>;
+				read-only;
+			};
+
+			partition@30000 {
+				label = "u-boot-env";
+				reg = <0x30000 0x10000>;
+				read-only;
+			};
+
+			partition@40000 {
+				label = "factory";
+				reg = <0x50000 0x40000>;
+				read-only;
+
+				nvmem-layout {
+					compatible = "fixed-layout";
+					#address-cells = <1>;
+					#size-cells = <1>;
+
+					eeprom_factory_0: eeprom@0 {
+						reg = <0x0 0xe00>;
+					};
+
+					macaddr_factory_e000: macaddr@e000 {
+						reg = <0xe000 0x6>;
+					};
+
+					macaddr_factory_e006: macaddr@e006 {
+						reg = <0xe006 0x6>;
+					};
+				};
+			};
+
+			partition@50000 {
+				compatible = "denx,uimage";
+				label = "firmware";
+				reg = <0x90000 0xf70000>;
+			};
+		};
+	};
+};
+
+&gmac0 {
+	nvmem-cells = <&macaddr_factory_e000>;
+	nvmem-cell-names = "mac-address";
+};
+
+&gmac1 {
+	status = "okay";
+	label = "wan";
+	phy-handle = <&ethphy4>;
+
+	nvmem-cells = <&macaddr_factory_e006>;
+	nvmem-cell-names = "mac-address";
+};
+
+&mdio {
+	ethphy4: ethernet-phy@4 {
+		reg = <4>;
+	};
+};
+
+&switch0 {
+	ports {
+		port@0 {
+			status = "okay";
+			label = "lan1";
+		};
+
+		port@1 {
+			status = "okay";
+			label = "lan2";
+		};
+
+		port@2 {
+			status = "okay";
+			label = "lan3";
+		};
+
+		port@3 {
+			status = "okay";
+			label = "lan4";
+		};
+	};
+};
+
+&pcie {
+	status = "okay";
+};
+
+&pcie1 {
+	wifi0: wifi@0,0 {
+		compatible = "mediatek,mt76";
+		reg = <0x0000 0 0 0 0>;
+		nvmem-cells = <&eeprom_factory_0>;
+		nvmem-cell-names = "eeprom";
+	};
+};
+
+&state_default {
+	gpio {
+		groups = "jtag", "wdt";
+		function = "gpio";
+	};
+};

target/linux/ramips/image/mt7621.mk

@@ -2918,6 +2918,16 @@ define Device/yuncore_fap690
 endef
 TARGET_DEVICES += yuncore_fap690
 
+define Device/yuncore_g720
+  $(Device/dsa-migration)
+  DEVICE_VENDOR := YunCore
+  DEVICE_MODEL := G720
+  DEVICE_PACKAGES := kmod-mt7915-firmware
+  IMAGE_SIZE := 15808k
+  SUPPORTED_DEVICES += mt7621-rfb-ax-nor
+endef
+TARGET_DEVICES += yuncore_g720
+
 define Device/zbtlink_zbt-we1326
   $(Device/dsa-migration)
   $(Device/uimage-lzma-loader)

target/linux/ramips/mt7621/base-files/etc/board.d/01_leds

@@ -30,7 +30,8 @@ asus,rt-ax53u)
 	ucidef_set_led_wlan "wlan2g" "WiFi 2.4GHz" "mt76-phy0" "phy0tpt"
 	ucidef_set_led_wlan "wlan5g" "WiFi 5GHz" "mt76-phy1" "phy1tpt"
 	;;
-asus,rt-ax54)
+asus,rt-ax54|\
+yuncore,g720)
 	ucidef_set_led_wlan "wlan2g" "WiFi 2.4GHz" "mt76-phy0" "phy0tpt"
 	ucidef_set_led_wlan "wlan5g" "WiFi 5GHz" "mt76-phy1" "phy1tpt"
 	;;

target/linux/ramips/mt7621/base-files/etc/hotplug.d/ieee80211/10_fix_wifi_mac

@@ -184,7 +184,8 @@ case "$board" in
 		hw_mac_addr="$(mtd_get_mac_binary rom_file 0xf100)"
 		[ "$PHYNBR" = "1" ] &&  macaddr_add "$hw_mac_addr" 2 > "/sys${DEVPATH}/macaddress"
 		;;
-	yuncore,ax820)
+	yuncore,ax820|\
+	yuncore,g720)
 		[ "$PHYNBR" = "1" ] && \
 			macaddr_setbit_la "$(mtd_get_mac_binary Factory 0xe000)" > /sys${DEVPATH}/macaddress
 		;;