ramips: Add support for ComFast CF-E390AX

Add support for ComFast CF-E390AX. It is a 802.11 wifi6 cieling AP, based on MediaTek MT7261AT.

Specifications:
SoC: MediaTek MT7621AT
RAM: 128 MiB
Flash: 16 MiB NOR (Macronix mx25l12805d)

Wireless: MT7915E (2.4G) 802.11ax/b/g/n MT7915E (5G) 802.11ac/ax/n
Ethernet: 2 x 1Gbs
Button: 1 x "Reset" button
LED: 1x Blue LED + 1x Red LED + 1x green LED
Power: PoE

Manufacturer Page:
http://en.comfast.com.cn/index.php?m=content&c=index&a=show&catid=84&id=75

Flash Layout:
0x000000000000-0x000000030000 : "bootloader"
0x000000030000-0x000000040000 : "config"
0x000000050000-0x000000060000 : "factory"
0x000000090000-0x000001000000 : "firmware"

First install:
1. Set device into http firmware fail safe upload mode by pressing the reset button for 10 seconds while powering
   it on. Once the LED stops flashing, safe mode will be running.
2. Set PC IP address to 192.168.1.2
3. Browse to 192.168.1.1 and upload the factory image using the web interface.

Signed-off-by: Usama Nassir <usama.nassir@gmail.com>

target/linux/ramips/dts/mt7621_comfast_cf-e390ax.dts

@@ -0,0 +1,135 @@
+// 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>
+#include <dt-bindings/leds/common.h>
+
+/ {
+	compatible = "comfast,cf-e390ax", "mediatek,mt7621-soc";
+	model = "COMFAST CF-E390AX";
+
+	chosen {
+		bootargs = "console=ttyS0,115200";
+	};
+
+	keys {
+		compatible = "gpio-keys";
+
+		reset {
+			label = "reset";
+			gpios = <&gpio 18 GPIO_ACTIVE_LOW>;
+			linux,code = <KEY_RESTART>;
+		};
+	};
+
+	leds {
+		compatible = "gpio-leds";
+
+		led_status_green: status_green {
+			label = "green:status";
+			gpios = <&gpio 15 GPIO_ACTIVE_LOW>;
+		};
+
+		led_status_blue: status_blue {
+			label = "blue:status";
+			gpios = <&gpio 16 GPIO_ACTIVE_LOW>;
+		};
+
+		led_status_red: status_red {
+			label = "red:status";
+			gpios = <&gpio 13 GPIO_ACTIVE_LOW>;
+		};
+	};
+
+	aliases {
+		led-boot = &led_status_green;
+		led-failsafe = &led_status_red;
+		led-running = &led_status_blue;
+		led-upgrade = &led_status_red;
+	};
+};
+
+&pcie {
+	status = "okay";
+};
+
+&pcie1 {
+	wifi@0,0 {
+		compatible = "mediatek,mt76";
+		reg = <0x0000 0 0 0 0>;
+		mediatek,mtd-eeprom = <&factory 0x0>;
+	};
+};
+
+&spi0 {
+	status = "okay";
+	flash@0 {
+		compatible = "jedec,spi-nor";
+		reg = <0>;
+		spi-max-frequency = <14000000>;
+		partitions {
+			compatible = "fixed-partitions";
+			#address-cells = <1>;
+			#size-cells = <1>;
+
+			partition@0 {
+				label = "bootloader";
+				reg = <0x0 0x30000>;
+				read-only;
+			};
+
+			partition@30000 {
+				label = "config";
+				reg = <0x30000 0x10000>;
+				read-only;
+			};
+
+			factory: partition@50000 {
+				label = "factory";
+				reg = <0x50000 0x10000>;
+				read-only;
+			};
+
+			partition@90000 {
+				compatible = "denx,uimage";
+				label = "firmware";
+				reg = <0x90000 0xf70000>;
+			};
+		};
+	};
+};
+
+&factory {
+	compatible = "nvmem-cells";
+	#address-cells = <1>;
+	#size-cells = <1>;
+
+	macaddr_factory_e000: macaddr@e000 {
+		reg = <0xe000 0x6>;
+	};
+};
+
+&gmac0 {
+	nvmem-cells = <&macaddr_factory_e000>;
+	nvmem-cell-names = "mac-address";
+};
+
+&switch0 {
+	ports {
+		port@0 {
+			status = "okay";
+			label = "wan";
+			nvmem-cells = <&macaddr_factory_e000>;
+			nvmem-cell-names = "mac-address";
+			mac-address-increment = <1>;
+		};
+
+		port@4 {
+			status = "okay";
+			label = "lan";
+		};
+	};
+};
+

target/linux/ramips/image/mt7621.mk

@@ -501,6 +501,20 @@ define Device/bolt_arion
 endef
 TARGET_DEVICES += bolt_arion
 
+define Device/comfast_cf-e390ax
+  $(Device/dsa-migration)
+  $(Device/uimage-lzma-loader)
+  IMAGE_SIZE := 15808k
+  DEVICE_VENDOR := ComFast
+  DEVICE_MODEL := CF-E390AX
+  DEVICE_PACKAGES := kmod-mt7915-firmware -uboot-envtools
+  IMAGES += factory.bin
+  IMAGE/sysupgrade.bin := append-kernel | append-rootfs | pad-rootfs | \
+	check-size | append-metadata
+  IMAGE/factory.bin := append-kernel | append-rootfs | pad-rootfs | check-size
+endef
+TARGET_DEVICES += comfast_cf-e390ax
+
 define Device/cudy_m1800
   $(Device/dsa-migration)
   DEVICE_VENDOR := Cudy

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

@@ -143,6 +143,9 @@ ramips_setup_interfaces()
 		ucidef_set_interface_lan "lan1 lan2 lan3 lan4"
 		ucidef_set_interface "qtn" ifname "eth1" protocol "static" ipaddr "1.1.1.1" netmask "255.255.255.0"
 		;;
+	comfast,cf-e390ax)
+		ucidef_set_interfaces_lan_wan "lan" "wan"
+		;;
 	*)
 		ucidef_set_interfaces_lan_wan "lan1 lan2 lan3 lan4" "wan"
 		;;
@@ -186,6 +189,11 @@ ramips_setup_macs()
 		lan_mac=$wan_mac
 		label_mac=$wan_mac
 		;;
+	comfast,cf-e390ax)
+		lan_mac=$(cat /sys/class/net/eth0/address)
+		label_mac=$lan_mac
+		wan_mac=$(macaddr_add "$lan_mac" 1)
+		;;
 	dlink,dir-860l-b1)
 		lan_mac=$(mtd_get_mac_ascii factory lanmac)
 		wan_mac=$(mtd_get_mac_ascii factory wanmac)

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

@@ -27,6 +27,10 @@ case "$board" in
 		hw_mac_addr=$(macaddr_unsetbit $hw_mac_addr 28)
 		[ "$PHYNBR" = "1" ] && macaddr_setbit_la $hw_mac_addr > /sys${DEVPATH}/macaddress
 		;;
+	comfast,cf-e390ax)
+		[ "$PHYNBR" = "0" ] && echo -n "$(mtd_get_mac_binary factory 0x0004)" > /sys${DEVPATH}/macaddress
+		[ "$PHYNBR" = "1" ] && echo -n "$(mtd_get_mac_binary factory 0x8004)" > /sys${DEVPATH}/macaddress
+		;;
 	cudy,x6-v1|\
 	cudy,x6-v2)
 		hw_mac_addr="$(mtd_get_mac_binary bdinfo 0xde00)"