ramips: add support for Joowin WR758AC V1 and V2

This commit adds support for Joowin (aka Comfast) WR758AC V1 and V2
devices.

Both have the same wall AP/repeater form factor and differ only
in the 5Ghz chipset (V1 has MT7662, V2 has MT7663).

OpenWrt developers forum page:
https://forum.openwrt.org/t/87355

Specifications:

 - CPU: MediaTek MT7628AN (580MHz)
 - Flash: 8MB
 - RAM: 64MB DDR2
 - 2.4 GHz: 802.11b/g/n (MT7603)
 - 5 GHz: 802.11ac (V1 has MT7662, V2 has MT7663)
 - Antennas: 4x external single band antennas
 - LAN: 1x 10/100M
 - LED: Wifi 3x blue. Programmable
 - Button: WPS

MAC addresses as verified by OEM firmware:

use address source
LAN *:83 factory 0xe000
2g *:85 factory 0x4
5g *:86 factory 0x8004

How to install:
1- Setup a TFTP server on a machine with IP address 192.168.1.10/24
2- Name the image as `firmware_auto.bin` and place it on the root of the
TFTP server
3- Connect the device via Ethernet, it should pick and flash the image

Signed-off-by: Rodrigo Araujo <araujo.rm@gmail.com>

target/linux/ramips/dts/mt7628an_joowin_jw-wr758ac-v1.dts

@@ -0,0 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0-or-later OR MIT
+
+#include "mt7628an_joowin_jw-wr758ac.dtsi"
+
+/ {
+	compatible = "joowin,jw-wr758ac-v1", "mediatek,mt7628an-soc";
+	model = "Joowin WR758AC V1";
+};

target/linux/ramips/dts/mt7628an_joowin_jw-wr758ac-v2.dts

@@ -0,0 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0-or-later OR MIT
+
+#include "mt7628an_joowin_jw-wr758ac.dtsi"
+
+/ {
+	compatible = "joowin,jw-wr758ac-v2", "mediatek,mt7628an-soc";
+	model = "Joowin WR758AC V2";
+};

target/linux/ramips/dts/mt7628an_joowin_jw-wr758ac.dtsi

@@ -0,0 +1,124 @@
+// SPDX-License-Identifier: GPL-2.0-or-later OR MIT
+
+#include "mt7628an.dtsi"
+
+#include <dt-bindings/input/input.h>
+#include <dt-bindings/gpio/gpio.h>
+
+/ {
+	compatible = "joowin,jw-wr758ac", "mediatek,mt7628an-soc";
+
+	keys {
+		compatible = "gpio-keys";
+
+		wps {
+			label = "wps";
+			gpios = <&gpio 38 GPIO_ACTIVE_LOW>;
+			linux,code = <KEY_WPS_BUTTON>;
+		};
+	};
+
+	leds {
+		compatible = "gpio-leds";
+
+		wifi-high {
+			label = "blue:wifi-high";
+			gpios = <&gpio 11 GPIO_ACTIVE_LOW>;
+		};
+
+		wifi-med {
+			label = "blue:wifi-med";
+			gpios = <&gpio 44 GPIO_ACTIVE_LOW>;
+		};
+
+		wifi-low {
+			label = "blue:wifi-low";
+			gpios = <&gpio 37 GPIO_ACTIVE_LOW>;
+		};
+	};
+};
+
+&state_default {
+	gpio {
+		groups = "refclk", "wdt", "wled_an";
+		function = "gpio";
+	};
+};
+
+&pcie {
+	status = "okay";
+};
+
+&pcie0 {
+	wifi@0,0 {
+		compatible = "mediatek,mt76";
+		reg = <0x0000 0 0 0 0>;
+		mediatek,mtd-eeprom = <&factory 0x8000>;
+		ieee80211-freq-limit = <5000000 6000000>;
+	};
+};
+
+&spi0 {
+	status = "okay";
+
+	flash@0 {
+		compatible = "jedec,spi-nor";
+		reg = <0>;
+		spi-max-frequency = <50000000>;
+
+		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;
+			};
+
+			factory: partition@40000 {
+				label = "factory";
+				reg = <0x40000 0x10000>;
+				read-only;
+			};
+
+			partition@50000 {
+				compatible = "denx,uimage";
+				label = "firmware";
+				reg = <0x50000 0x7b0000>;
+			};
+		};
+	};
+};
+
+&wmac {
+	status = "okay";
+
+	mediatek,mtd-eeprom = <&factory 0x0>;
+};
+
+&ethernet {
+	nvmem-cells = <&macaddr_factory_e000>;
+	nvmem-cell-names = "mac-address";
+};
+
+&esw {
+	mediatek,portdisable = <0x2f>;
+};
+
+&factory {
+	compatible = "nvmem-cells";
+	#address-cells = <1>;
+	#size-cells = <1>;
+
+	macaddr_factory_e000: macaddr@e000 {
+		reg = <0xe000 0x6>;
+	};
+};

target/linux/ramips/image/mt76x8.mk

@@ -220,6 +220,26 @@ define Device/iptime_a604m
 endef
 TARGET_DEVICES += iptime_a604m
 
+define Device/joowin_jw-wr758ac
+  IMAGE_SIZE := 7872k
+  DEVICE_VENDOR := Joowin
+  DEVICE_MODEL := WR758AC
+endef
+
+define Device/joowin_jw-wr758ac-v1
+  $(Device/joowin_jw-wr758ac)
+  DEVICE_PACKAGES := kmod-mt76x2
+  DEVICE_VARIANT := V1
+endef
+TARGET_DEVICES += joowin_jw-wr758ac-v1
+
+define Device/joowin_jw-wr758ac-v2
+  $(Device/joowin_jw-wr758ac)
+  DEVICE_PACKAGES := kmod-mt7615e kmod-mt7663-firmware-ap
+  DEVICE_VARIANT := V2
+endef
+TARGET_DEVICES += joowin_jw-wr758ac-v2
+
 define Device/jotale_js76x8
   DEVICE_VENDOR := Jotale
   DEVICE_MODEL := JS76x8

target/linux/ramips/mt76x8/base-files/etc/board.d/02_network

@@ -129,6 +129,8 @@ ramips_setup_interfaces()
 		ucidef_add_switch "switch0" \
 			"0:lan" "1:lan" "2:lan" "3:wan" "6@eth0"
 		;;
+	joowin,jw-wr758ac-v1|\
+	joowin,jw-wr758ac-v2|\
 	tplink,tl-wr902ac-v3|\
 	wavlink,wl-wn576a2)
 		ucidef_add_switch "switch0" \