ramips: add support for Netgear EAX12 series

Netgear EAX12, EAX11v2, EAX15v2 are wall-plug 802.11ax (Wi-Fi 6)
extenders that share the SoC, WiFi chip, and image format with the
WAX202.

Specifications:
* MT7621, 256 MiB RAM, 128 MiB NAND
* MT7915: 2.4/5 GHz 2x2 802.11ax (DBDC)
* Ethernet: 1 port 10/100/1000
* UART: 115200 baud (labeled on board)

All LEDs and buttons appear to work without state_default.

Installation:
* Flash the factory image through the stock web interface, or TFTP to
  the bootloader. NMRP can be used to TFTP without opening the case.

Revert to stock firmware:
* Flash the stock firmware to the bootloader using TFTP/NMRP.

References in GPL source:
https://www.downloads.netgear.com/files/GPL/EAX12_EAX11v2_EAX15v2_GPL_V1.0.3.34_src.tar.gz

* target/linux/ramips/dts/mt7621-rfb-ax-nand.dts
  DTS file for this device.

Signed-off-by: Wenli Looi <wlooi@ucalgary.ca>

package/boot/uboot-envtools/files/ramips

@@ -65,6 +65,7 @@ h3c,tx1801-plus|\
 h3c,tx1806|\
 jcg,q20|\
 linksys,e7350|\
+netgear,eax12|\
 netgear,wax202|\
 zyxel,wsm20)
 	ubootenv_add_uci_config "/dev/mtd1" "0x0" "0x20000" "0x20000"

target/linux/ramips/dts/mt7621_netgear_eax12.dts

@@ -0,0 +1,189 @@
+// SPDX-License-Identifier: GPL-2.0-or-later OR MIT
+
+#include "mt7621.dtsi"
+
+#include <dt-bindings/gpio/gpio.h>
+#include <dt-bindings/input/input.h>
+
+/ {
+	compatible = "netgear,eax12", "mediatek,mt7621-soc";
+	model = "Netgear EAX12";
+
+	aliases {
+		led-boot = &led_power_green;
+		led-failsafe = &led_power_red;
+		led-running = &led_power_green;
+		led-upgrade = &led_power_red;
+	};
+
+	chosen {
+		bootargs = "console=ttyS0,115200";
+	};
+
+	keys {
+		compatible = "gpio-keys";
+
+		reset {
+			label = "reset";
+			gpios = <&gpio 15 GPIO_ACTIVE_LOW>;
+			linux,code = <KEY_RESTART>;
+		};
+
+		wps {
+			label = "wps";
+			gpios = <&gpio 8 GPIO_ACTIVE_LOW>;
+			linux,code = <KEY_WPS_BUTTON>;
+		};
+	};
+
+	leds {
+		compatible = "gpio-leds";
+
+		led_power_green: power_green {
+			label = "green:power";
+			gpios = <&gpio 16 GPIO_ACTIVE_LOW>;
+		};
+
+		led_power_red: power_red {
+			label = "red:power";
+			gpios = <&gpio 7 GPIO_ACTIVE_LOW>;
+		};
+
+		client_green {
+			label = "green:client";
+			gpios = <&gpio 13 GPIO_ACTIVE_LOW>;
+		};
+
+		client_red {
+			label = "red:client";
+			gpios = <&gpio 14 GPIO_ACTIVE_LOW>;
+		};
+
+		router_green {
+			label = "green:router";
+			gpios = <&gpio 5 GPIO_ACTIVE_HIGH>;
+		};
+
+		router_red {
+			label = "red:router";
+			gpios = <&gpio 11 GPIO_ACTIVE_HIGH>;
+		};
+
+		wps_green {
+			label = "green:wps";
+			gpios = <&gpio 17 GPIO_ACTIVE_HIGH>;
+		};
+
+		eth_green {
+			label = "green:eth";
+			gpios = <&gpio 10 GPIO_ACTIVE_LOW>;
+		};
+
+		eth_yellow {
+			label = "yellow:eth";
+			gpios = <&gpio 12 GPIO_ACTIVE_LOW>;
+		};
+	};
+};
+
+&nand {
+	status = "okay";
+
+	partitions {
+		compatible = "fixed-partitions";
+		#address-cells = <1>;
+		#size-cells = <1>;
+
+		partition@0 {
+			label = "Bootloader";
+			reg = <0x0 0x80000>;
+			read-only;
+		};
+
+		partition@80000 {
+			label = "Config";
+			reg = <0x80000 0x80000>;
+			read-only;
+		};
+
+		factory: partition@100000 {
+			label = "Factory";
+			reg = <0x100000 0x80000>;
+			read-only;
+		};
+
+		partition@180000 {
+			label = "firmware";
+			reg = <0x180000 0x3800000>;
+
+			compatible = "fixed-partitions";
+			#address-cells = <1>;
+			#size-cells = <1>;
+
+			partition@0 {
+				label = "kernel";
+				reg = <0x0 0x400000>;
+			};
+
+			partition@400000 {
+				label = "ubi";
+				reg = <0x400000 0x3400000>;
+			};
+		};
+
+		partition@2780000 {
+			label = "firmware_backup";
+			reg = <0x3980000 0x3800000>;
+			read-only;
+		};
+
+		partition@4d80000 {
+			label = "CFG";
+			reg = <0x7180000 0x200000>;
+			read-only;
+		};
+
+		partition@5580000 {
+			label = "RAE";
+			reg = <0x7380000 0x600000>;
+			read-only;
+		};
+
+		partition@5980000 {
+			label = "POT";
+			reg = <0x7980000 0x020000>;
+			read-only;
+		};
+
+		partition@6780000 {
+			label = "LOG";
+			reg = <0x79A0000 0x40000>;
+			read-only;
+		};
+	};
+};
+
+&pcie {
+	status = "okay";
+};
+
+&pcie1 {
+	wifi@0,0 {
+		compatible = "mediatek,mt76";
+		reg = <0x0000 0 0 0 0>;
+		mediatek,mtd-eeprom = <&factory 0x0>;
+	};
+};
+
+&switch0 {
+	ports {
+		port@0 {
+			status = "okay";
+			label = "lan";
+		};
+	};
+};
+
+&xhci {
+	status = "disabled";
+};

target/linux/ramips/image/mt7621.mk

@@ -1598,6 +1598,32 @@ define Device/mts_wg430223
 endef
 TARGET_DEVICES += mts_wg430223
 
+define Device/netgear_eax12
+  $(Device/nand)
+  DEVICE_VENDOR := NETGEAR
+  DEVICE_MODEL := EAX12
+  DEVICE_ALT0_VENDOR := NETGEAR
+  DEVICE_ALT0_MODEL := EAX11
+  DEVICE_ALT0_VARIANT := v2
+  DEVICE_ALT1_VENDOR := NETGEAR
+  DEVICE_ALT1_MODEL := EAX15
+  DEVICE_ALT1_VARIANT := v2
+  DEVICE_PACKAGES := kmod-mt7915-firmware -uboot-envtools
+  NETGEAR_ENC_MODEL := EAX12
+  NETGEAR_ENC_REGION := US
+  NETGEAR_ENC_HW_ID_LIST := 1010000004540000_NETGEAR
+  NETGEAR_ENC_MODEL_LIST := EAX12;EAX11v2;EAX15v2
+  IMAGE_SIZE := 57344k
+  KERNEL_LOADADDR := 0x82000000
+  KERNEL := kernel-bin | relocate-kernel 0x80001000 | lzma | \
+	fit lzma $$(KDIR)/image-$$(firstword $$(DEVICE_DTS)).dtb | \
+	append-squashfs4-fakeroot
+  IMAGES += factory.img
+  IMAGE/factory.img := append-kernel | pad-to $$(KERNEL_SIZE) | \
+	append-ubi | check-size | netgear-encrypted-factory
+endef
+TARGET_DEVICES += netgear_eax12
+
 define Device/netgear_ex6150
   $(Device/dsa-migration)
   $(Device/uimage-lzma-loader)

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

@@ -138,6 +138,10 @@ mikrotik,routerboard-m11g)
 mtc,wr1201)
 	ucidef_set_led_netdev "eth_link" "LAN link" "green:eth_link" "br-lan"
 	;;
+netgear,eax12)
+	ucidef_set_led_netdev "eth_act" "LAN act" "yellow:eth" "lan" "tx rx"
+	ucidef_set_led_netdev "eth_link" "LAN link" "green:eth" "lan" "link"
+	;;
 netgear,r6220|\
 netgear,r6260|\
 netgear,r6350|\

target/linux/ramips/mt7621/base-files/etc/board.d/02_network

@@ -20,6 +20,7 @@ ramips_setup_interfaces()
 	linksys,re7000|\
 	mikrotik,ltap-2hnd|\
 	mikrotik,routerboard-m11g|\
+	netgear,eax12|\
 	netgear,ex6150|\
 	sercomm,na502|\
 	sercomm,na502s|\
@@ -275,6 +276,10 @@ ramips_setup_macs()
 		label_mac=$wan_mac
 		lan_mac=$(macaddr_add "$wan_mac" 2)
 		;;
+	netgear,eax12)
+		lan_mac=$(mtd_get_mac_ascii Config mac)
+		label_mac=$lan_mac
+		;;
 	netgear,wax202)
 		lan_mac=$(mtd_get_mac_ascii Config mac)
 		wan_mac=$(macaddr_add "$lan_mac" 1)

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

@@ -118,6 +118,11 @@ case "$board" in
 		[ "$PHYNBR" = "0" ] && macaddr_add $hw_mac_addr 1 > /sys${DEVPATH}/macaddress
 		[ "$PHYNBR" = "1" ] && macaddr_add $hw_mac_addr 2 > /sys${DEVPATH}/macaddress
 		;;
+	netgear,eax12)
+		hw_mac_addr=$(mtd_get_mac_ascii Config mac)
+		[ "$PHYNBR" = "0" ] && macaddr_add $hw_mac_addr 1 > /sys${DEVPATH}/macaddress
+		[ "$PHYNBR" = "1" ] && macaddr_add $hw_mac_addr 2 > /sys${DEVPATH}/macaddress
+		;;
 	netgear,wax202)
 		hw_mac_addr=$(mtd_get_mac_ascii Config mac)
 		[ "$PHYNBR" = "0" ] && macaddr_add $hw_mac_addr 2 > /sys${DEVPATH}/macaddress

target/linux/ramips/mt7621/base-files/lib/upgrade/platform.sh

@@ -87,6 +87,7 @@ platform_do_upgrade() {
 	linksys,ea8100-v1|\
 	linksys,ea8100-v2|\
 	mts,wg430223|\
+	netgear,eax12|\
 	netgear,r6220|\
 	netgear,r6260|\
 	netgear,r6350|\