ramips: add support for Wavlink WL-WN531G3-A2

This device is exactly the same as WL-WN531G3 but with different partition layout and different MAC layout. Labeled as Quantum D4G Rev.: A2.

Hardware
--------
SoC:   Mediatek MT7620A
RAM:   64MB
FLASH: 8MB NOR (GigaDevice GD25Q64CS)
ETH:
  - 2x 10/100/1000 Mbps Ethernet (RTL8211F)
  - 3x 10/100 Mbps Ethernet (integrated in SOC)
WIFI:
  - 2.4GHz: 1x (integrated in SOC) (2x2:2)
  - 5GHz:   1x MT7612E (2x2:2)
  - 4 external antennas
BTN:
  - 1x Reset button
  - 1x Touchlink button
  - 1x Turbo button
  - 1x Wps button
  - 1x ON/OFF switch
LEDS:
  - 1x Red led (system status)
  - 1x Blue led (system status)
  - 5x Blue leds (ethernet ports)
  - 1x Power led
  - 1x Wifi led
UART:
  - 57600-8-N-1
Everything works correctly.

Installation
------------
Flash the initramfs image in the OEM firmware interface
When Openwrt boots, flash the sysupgrade image otherwise you won't be
able to keep configuration between reboots.

Notes
-----
1) Router mac addresses:
   LAN XX:XX:XX:XX:XX:0F (factory @ 0x28)
   WAN XX:XX:XX:XX:XX:10 (factory @ 0x2e)
   WIFI 2G XX:XX:XX:XX:XX:11 (factory @ 0x04)
   WIFI 5G XX:XX:XX:XX:XX:12 (factory @ 0x8004)

   LABEL XX:XX:XX:XX:XX:11

Signed-off-by: Eros Brigmann <erosbrigmann@gmail.com>
Link: https://github.com/openwrt/openwrt/pull/15876
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>

target/linux/ramips/dts/mt7620a_wavlink_wl-wn531g3-a2.dts

@@ -0,0 +1,201 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#include "mt7620a.dtsi"
+#include <dt-bindings/input/input.h>
+#include <dt-bindings/gpio/gpio.h>
+#include <dt-bindings/leds/common.h>
+
+/ {
+	compatible = "wavlink,wl-wn531g3", "ralink,mt7620a-soc";
+	model = "Wavlink WL-WN531G3";
+
+	aliases {
+		led-boot = &led_status_blue;
+		led-failsafe = &led_status_red;
+		led-running = &led_status_blue;
+		led-upgrade = &led_status_red;
+	};
+
+	keys {
+		compatible = "gpio-keys";
+
+		reset {
+			label = "reset";
+			gpios = <&gpio0 1 GPIO_ACTIVE_LOW>;
+			linux,code = <KEY_RESTART>;
+		};
+
+		turbo {
+			label = "turbo";
+			gpios = <&gpio0 12 GPIO_ACTIVE_LOW>;
+			linux,code = <BTN_1>;
+		};
+
+		wps {
+			label = "wps";
+			gpios = <&gpio0 2 GPIO_ACTIVE_LOW>;
+			linux,code = <KEY_WPS_BUTTON>;
+		};
+
+		touchlink {
+			label = "touchlink";
+			gpios = <&gpio0 11 GPIO_ACTIVE_LOW>;
+			linux,code = <BTN_0>;
+		};
+	};
+
+	leds {
+		compatible = "gpio-leds";
+
+		led_status_blue: led_status_blue {
+			function = LED_FUNCTION_STATUS;
+			color = <LED_COLOR_ID_BLUE>;
+			gpios = <&gpio0 9 GPIO_ACTIVE_HIGH>;
+		};
+
+		led_status_red: led_status_red {
+			function = LED_FUNCTION_STATUS;
+			color = <LED_COLOR_ID_RED>;
+			gpios = <&gpio0 14 GPIO_ACTIVE_HIGH>;
+		};
+	};
+};
+
+&ehci {
+	status = "okay";
+};
+
+&ohci {
+	status = "okay";
+};
+
+&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;
+
+				nvmem-layout {
+					compatible = "fixed-layout";
+					#address-cells = <1>;
+					#size-cells = <1>;
+
+					macaddr_factory_28: macaddr@28 {
+						reg = <0x28 0x6>;
+					};
+
+					macaddr_factory_2e: macaddr@2e {
+						reg = <0x2e 0x6>;
+					};
+
+					eeprom_radio_0: eeprom@0 {
+						reg = <0x0 0x200>;
+					};
+
+					eeprom_radio_8000: eeprom@8000 {
+						reg = <0x8000 0x200>;
+					};
+				};
+			};
+
+			partition@50000 {
+				compatible = "denx,uimage";
+				label = "firmware";
+				reg = <0x50000 0x7b0000>;
+			};
+		};
+	};
+};
+
+&ethernet {
+	pinctrl-names = "default";
+	pinctrl-0 = <&rgmii1_pins>, <&rgmii2_pins>, <&mdio_pins>;
+
+	nvmem-cells = <&macaddr_factory_28>;
+	nvmem-cell-names = "mac-address";
+
+	mediatek,portmap = "llllw";
+
+	port@4 {
+		status = "okay";
+		phy-handle = <&phy4>;
+		phy-mode = "rgmii";
+
+		nvmem-cells = <&macaddr_factory_2e>;
+		nvmem-cell-names = "mac-address";
+	};
+
+	port@5 {
+		status = "okay";
+		phy-handle = <&phy5>;
+		phy-mode = "rgmii";
+	};
+
+	mdio-bus {
+		status = "okay";
+
+		phy4: ethernet-phy@4 {
+			reg = <4>;
+			phy-mode = "rgmii";
+		};
+
+		phy5: ethernet-phy@5 {
+			reg = <5>;
+			phy-mode = "rgmii";
+		};
+	};
+};
+
+&pcie {
+	status = "okay";
+};
+
+&pcie0 {
+	mt76@0,0 {
+		compatible = "mediatek,mt76";
+		reg = <0x0000 0 0 0 0>;
+		nvmem-cells = <&eeprom_radio_8000>;
+		nvmem-cell-names = "eeprom";
+		ieee80211-freq-limit = <5000000 6000000>;
+	};
+};
+
+&gsw {
+	mediatek,port4-gmac;
+};
+
+&wmac {
+	nvmem-cells = <&eeprom_radio_0>;
+	nvmem-cell-names = "eeprom";
+};
+
+&state_default {
+	gpio {
+		groups = "i2c", "uartf";
+		function = "gpio";
+	};
+};

target/linux/ramips/image/mt7620.mk

@@ -1349,6 +1349,16 @@ define Device/wavlink_wl-wn531g3
 endef
 TARGET_DEVICES += wavlink_wl-wn531g3
 
+
+define Device/wavlink_wl-wn531g3-a2
+  SOC := mt7620a
+  IMAGE_SIZE := 7872k
+  DEVICE_VENDOR := Wavlink
+  DEVICE_MODEL := WL-WN531G3-A2
+  DEVICE_PACKAGES := kmod-mt76x2 kmod-phy-realtek kmod-usb2 kmod-usb-ohci
+endef
+TARGET_DEVICES += wavlink_wl-wn531g3-a2
+
 define Device/wavlink_wl-wn535k1
   SOC := mt7620a
   IMAGE_SIZE := 7360k

target/linux/ramips/mt7620/base-files/etc/board.d/02_network

@@ -257,6 +257,10 @@ ramips_setup_interfaces()
 		ucidef_add_switch "switch0" \
 			"0:lan:4" "1:lan:3" "2:lan:2" "5:lan:1" "4:wan" "6@eth0"
 		;;
+	wavlink,wl-wn531g3-a2)
+		ucidef_add_switch "switch0" \
+			"0:lan:4" "1:lan:3" "2:lan:2" "5:lan:1" "4:wan" "6@eth0"
+		;;
 	wavlink,wl-wn535k1)
 		ucidef_add_switch "switch0" \
 			"2:lan:2" "5:lan:1" "4:wan" "6@eth0"
@@ -431,6 +435,7 @@ ramips_setup_macs()
 		wan_mac=$(macaddr_add "$(mtd_get_mac_binary rom 0xf100)" 1)
 		;;
 	wavlink,wl-wn531g3|\
+	wavlink,wl-wn531g3-a2|\
 	zbtlink,zbt-we1026-5g-16m)
 		label_mac=$(mtd_get_mac_binary factory 0x4)
 		;;