ramips: add support for ZBT WE3526

This is a variant of the ZBT WG3526 with a few minor modifications.
The wifi chips are swapped, and there is no GPIO controllable status
LED. There is also no SATA port.

Specifications:

- MT7621AT (880 MHz)
- 512 MB RAM
- 16 MB Flash (SPI NOR)
- 5x 1Gbps Ethernet (built-in switch)
- MT7612E 802.11ac 5 GHz WLAN
- MT7603E 802.11n 2.4 GHz WLAN

Signed-off-by: Felix Fietkau <nbd@nbd.name>

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

@@ -114,6 +114,7 @@ ramips_setup_interfaces()
 	youku-yk1|\
 	zbt-ape522ii|\
 	zbt-we1326|\
+	zbt-we3526|\
 	zbt-we826-16M|\
 	zbt-we826-32M|\
 	zbt-wg2626|\

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

@@ -202,6 +202,7 @@ platform_check_image() {
 	zbt-wa05|\
 	zbt-we1326|\
 	zbt-we2026|\
+	zbt-we3526|\
 	zbt-we826-16M|\
 	zbt-we826-32M|\
 	zbt-wg2626|\

target/linux/ramips/dts/ZBT-WE3526.dts

@@ -0,0 +1,117 @@
+/dts-v1/;
+
+#include "mt7621.dtsi"
+
+#include <dt-bindings/gpio/gpio.h>
+#include <dt-bindings/input/input.h>
+
+/ {
+	compatible = "zbtlink,zbt-we3526", "mediatek,mt7621-soc";
+	model = "ZBT-WE3526";
+
+	memory@0 {
+		device_type = "memory";
+		reg = <0x0 0x1c000000>, <0x20000000 0x4000000>;
+	};
+
+	chosen {
+		bootargs = "console=ttyS0,115200";
+	};
+
+	palmbus: palmbus@1E000000 {
+		i2c@900 {
+			status = "okay";
+		};
+	};
+
+	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>;
+		};
+	};
+};
+
+&sdhci {
+	status = "okay";
+};
+
+&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;
+		};
+
+		firmware: partition@50000 {
+			label = "firmware";
+			reg = <0x50000 0xfb0000>;
+		};
+	};
+};
+
+&pcie {
+	status = "okay";
+
+	pcie0 {
+		wifi@14c3,7662 {
+			compatible = "pci14c3,7662";
+			reg = <0x0000 0 0 0 0>;
+			mediatek,mtd-eeprom = <&factory 0x8000>;
+			ieee80211-freq-limit = <5000000 6000000>;
+
+			led {
+				led-sources = <2>;
+			};
+		};
+	};
+
+	pcie1 {
+		wifi@14c3,7603 {
+			compatible = "pci14c3,7603";
+			reg = <0x0000 0 0 0 0>;
+			mediatek,mtd-eeprom = <&factory 0x0000>;
+		};
+	};
+};
+
+&ethernet {
+	mtd-mac-address = <&factory 0xe000>;
+};
+
+&pinctrl {
+	state_default: pinctrl0 {
+		gpio {
+			ralink,group = "wdt";
+			ralink,function = "gpio";
+		};
+	};
+};

target/linux/ramips/image/mt7621.mk

@@ -329,6 +329,17 @@ define Device/zbt-we1326
 endef
 TARGET_DEVICES += zbt-we1326
 
+define Device/zbt-we3526
+  DTS := ZBT-WE3526
+  IMAGE_SIZE := $(ralink_default_fw_size_16M)
+  SUPPORTED_DEVICES += zbt-we3526
+  DEVICE_TITLE := ZBT WE3526
+  DEVICE_PACKAGES := \
+	kmod-sdhci-mt7620 kmod-mt7603 kmod-mt76x2 \
+	kmod-usb3 kmod-usb-ledtrig-usbport wpad-mini
+endef
+TARGET_DEVICES += zbt-we3526
+
 define Device/zbt-wg2626
   DTS := ZBT-WG2626
   IMAGE_SIZE := $(ralink_default_fw_size_16M)