ramips: add support for ZBT-WE1326

Specification:
- SoC: MT7621AT, MT7603EN and MT7612EN
- Flash: 16 MiB (W25Q128FVSG)
- RAM: 512 MiB (EM6GE16EWXD-12H)
- Ethernet: 1 x WAN (10/100/1000Mbps) and 4 x LAN (10/100/1000 Mbps)
- Others: USB 2.0, micro SD slot, reset button and 8 x LEDs

Issues:
- Two LEDs for 2.4 GHz and 5 GHz Wi-Fi do not work, can't find GPIOs.
- The pwr LED is not GPIO controllable

How to install:
- The original firmware is OpenWrt, so both LuCI or sysupgrade can be used.
- Do not keep settings, for sysupgrade please use the -n option.

Signed-off-by: Jiawei Wang <buaawjw@gmail.com>

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

@@ -112,6 +112,7 @@ ramips_setup_interfaces()
 	y1|\
 	youku-yk1|\
 	zbt-ape522ii|\
+	zbt-we1326|\
 	zbt-we826|\
 	zbt-wg2626|\
 	zbt-wg3526|\

target/linux/ramips/base-files/lib/ramips.sh

@@ -649,6 +649,9 @@ ramips_board_detect() {
 	*"ZBT-WA05")
 		name="zbt-wa05"
 		;;
+	*"ZBT-WE1326")
+		name="zbt-we1326"
+		;;
 	*"ZBT-WE2026")
 		name="zbt-we2026"
 		;;

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

@@ -192,6 +192,7 @@ platform_check_image() {
 	zbt-ape522ii|\
 	zbt-cpe102|\
 	zbt-wa05|\
+	zbt-we1326|\
 	zbt-we2026|\
 	zbt-we826|\
 	zbt-wg2626|\

target/linux/ramips/dts/ZBT-WE1326.dts

@@ -0,0 +1,107 @@
+/dts-v1/;
+
+#include "mt7621.dtsi"
+
+#include <dt-bindings/gpio/gpio.h>
+#include <dt-bindings/input/input.h>
+
+/ {
+	model = "ZBT-WE1326";
+
+	chosen {
+		bootargs = "console=ttyS0,115200";
+	};
+
+	memory@0 {
+		device_type = "memory";
+		reg = <0x0 0x1c000000>, <0x20000000 0x4000000>;
+	};
+
+	gpio-keys-polled {
+		compatible = "gpio-keys-polled";
+		#address-cells = <1>;
+		#size-cells = <0>;
+		poll-interval = <20>;
+
+		reset {
+			label = "reset";
+			gpios = <&gpio0 18 GPIO_ACTIVE_LOW>;
+			linux,code = <KEY_RESTART>;
+		};
+	};
+};
+
+&pinctrl {
+	state_default: pinctrl0 {
+		gpio {
+			ralink,group = "wdt";
+			ralink,function = "gpio";
+		};
+	};
+};
+
+&spi0 {
+	status = "okay";
+
+	m25p80@0 {
+		#address-cells = <1>;
+		#size-cells = <1>;
+		compatible = "jedec,spi-nor";
+		reg = <0>;
+		spi-max-frequency = <10000000>;
+		m25p,chunked-io = <32>;
+
+		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 {
+			label = "firmware";
+			reg = <0x50000 0xfb0000>;
+		};
+	};
+};
+
+&ethernet {
+	mtd-mac-address = <&factory 0xe000>;
+};
+
+&pcie {
+	status = "okay";
+
+	pcie0 {
+		mt76@0,0 {
+			reg = <0x0000 0 0 0 0>;
+			device_type = "pci";
+			mediatek,mtd-eeprom = <&factory 0x8000>;
+			ieee80211-freq-limit = <5000000 6000000>;
+		};
+	};
+
+	pcie1 {
+		mt76@1,0 {
+			reg = <0x0000 0 0 0 0>;
+			device_type = "pci";
+			mediatek,mtd-eeprom = <&factory 0x0000>;
+			ieee80211-freq-limit = <2400000 2500000>;
+		};
+	};
+};
+
+&sdhci {
+	status = "okay";
+};

target/linux/ramips/image/mt7621.mk

@@ -245,6 +245,14 @@ define Device/wsr-600
 endef
 TARGET_DEVICES += wsr-600
 
+define Device/zbt-we1326
+  DTS := ZBT-WE1326
+  IMAGE_SIZE := $(ralink_default_fw_size_16M)
+  DEVICE_TITLE := ZBT WE1326
+  DEVICE_PACKAGES := kmod-usb3 kmod-sdhci-mt7620
+endef
+TARGET_DEVICES += zbt-we1326
+
 define Device/zbt-wg2626
   DTS := ZBT-WG2626
   IMAGE_SIZE := $(ralink_default_fw_size_16M)