ramips: add support for Youku YK-L2

Hardware spec:

CPU: MTK MT7621A
RAM: 256MB
ROM: 16MB SPI Flash
WiFi: MT7603EN + MT7612EN
Button: 2 buttons (reset, wps)
LED: 8 LEDs (Power 2G 5G WPS Internet LAN1 LAN2 USB)
Ethernet: 3 ports, 2 LAN + 1 WAN
Other: USB3.0

Flashing instructions:

Visit the openwrt forum topic for this router:
https://forum.openwrt.org/t/add-openwrt-support-for-youku-yk-l2/34692

to get the bootloader and unlock firmware.

0. upgrade your router with the telnet firmware via the
   firmware upgrade page on the webui.

1. telnet 192.168.11.1 from your PC

2. Download the pb-boot-youku_l2-20190317-61b6d33.bin and transfer
   it to the /tmp directory of the router.

3. mtd write /tmp/pb-boot-youku_l2-20190317-61b6d33.bin Bootloader

4. turn off the power

5. Push the reset button while turning on the router and
   wait until LED start blinking (~10sec.)

6. Connect Ethernet port and goto http://192.168.1.1.

7. Upload the firmware to firmware restore page in webui.

Signed-off-by: Zhao Yu <574249312@qq.com>
Signed-off-by: Christian Lamparter <chunkeey@gmail.com> [rewrote the
flashing instructions, fixed author]

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

@@ -130,6 +130,7 @@ ramips_setup_interfaces()
 	mqmaker,witi-512m|\
 	wndr3700v5|\
 	youku-yk1|\
+	youku,yk-l2|\
 	zbt-ape522ii|\
 	zbt-we1326|\
 	zbtlink,zbt-we3526|\

target/linux/ramips/dts/YOUKU-YK2.dts

@@ -0,0 +1,157 @@
+// SPDX-License-Identifier: GPL-2.0-or-later OR MIT
+/dts-v1/;
+
+#include "mt7621.dtsi"
+
+#include <dt-bindings/gpio/gpio.h>
+#include <dt-bindings/input/input.h>
+
+/ {
+	compatible = "youku,yk-l2", "mediatek,mt7621-soc";
+	model = "Youku YK-L2";
+
+	aliases {
+		led-boot = &led_power;
+		led-failsafe = &led_power;
+		led-running = &led_power;
+		led-upgrade = &led_wps;
+	};
+
+	memory@0 {
+		device_type = "memory";
+		reg = <0x0 0x10000000>;
+	};
+
+	chosen {
+		bootargs = "console=ttyS0,115200";
+	};
+
+	leds {
+		compatible = "gpio-leds";
+
+		led_power: power {
+			label = "yk-l2:blue:power";
+			gpios = <&gpio0 13 GPIO_ACTIVE_LOW>;
+			default-state = "on";
+		};
+
+		led_wps: wps {
+			label = "yk-l2:blue:wps";
+			gpios = <&gpio0 14 GPIO_ACTIVE_LOW>;
+		};
+
+		usb {
+			label = "yk-l2:blue:usb";
+			gpios = <&gpio0 16 GPIO_ACTIVE_LOW>;
+			trigger-sources = <&xhci_ehci_port1>, <&ehci_port2>;
+			linux,default-trigger = "usbport";
+		};
+	};
+
+	keys {
+		compatible = "gpio-keys-polled";
+		poll-interval = <20>;
+
+		reset {
+			label = "reset";
+			gpios = <&gpio0 18 GPIO_ACTIVE_LOW>;
+			linux,code = <KEY_RESTART>;
+		};
+
+		wps {
+			label = "wps";
+			gpios = <&gpio0 17 GPIO_ACTIVE_LOW>;
+			linux,code = <KEY_WPS_BUTTON>;
+		};
+	};
+};
+
+&sdhci {
+	status = "okay";
+};
+
+&xhci {
+	status = "okay";
+};
+
+&spi0 {
+	status = "okay";
+
+	flash@0 {
+		compatible = "jedec,spi-nor";
+		reg = <0>;
+		spi-max-frequency = <10000000>;
+
+		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;
+			};
+
+			partition@50000 {
+				compatible = "denx,uimage";
+				label = "firmware";
+				reg = <0x50000 0xfb0000>;
+			};
+		};
+	};
+};
+
+&pcie {
+	status = "okay";
+};
+
+&pcie0 {
+	wifi@0,0 {
+		compatible = "pci14c3,7603";
+		reg = <0x0000 0 0 0 0>;
+		mediatek,mtd-eeprom = <&factory 0x0000>;
+		ieee80211-freq-limit = <2400000 2500000>;
+		led {
+			led-active-low;
+		};
+	};
+};
+
+&pcie1 {
+	wifi@0,0 {
+		compatible = "pci14c3,7662";
+		reg = <0x0000 0 0 0 0>;
+		mediatek,mtd-eeprom = <&factory 0x8000>;
+		ieee80211-freq-limit = <5000000 6000000>;
+		led {
+			led-sources = <2>;
+			led-active-low;
+		};
+	};
+};
+
+&ethernet {
+	mtd-mac-address = <&factory 0xe000>;
+};
+
+&pinctrl {
+	state_default: pinctrl0 {
+		gpio {
+			ralink,group = "jtag", "wdt";
+			ralink,function = "gpio";
+		};
+	};
+};

target/linux/ramips/image/mt7621.mk

@@ -546,6 +546,15 @@ define Device/youhua_wr1200js
 endef
 TARGET_DEVICES += youhua_wr1200js
 
+define Device/youku_yk-l2
+  DTS := YOUKU-YK2
+  IMAGE_SIZE := $(ralink_default_fw_size_16M)
+  DEVICE_TITLE := Youku YK-L2
+  DEVICE_PACKAGES := \
+	kmod-mt7603 kmod-mt76x2 kmod-usb3 kmod-usb-ledtrig-usbport wpad-basic
+endef
+TARGET_DEVICES += youku_yk-l2
+
 define Device/wsr-1166
   DTS := WSR-1166
   IMAGE/sysupgrade.bin := trx | pad-rootfs | append-metadata