ramips: add support for GL-inet GL-MT300N-V2

This patch adds supports for the GL-inet GL-MT300N-V2.

Specification:
- SoC: MediaTek MT7628AN
- Flash: 16 MiB (W25Q128FVSG)
- RAM: 128 MiB DDR
- Ethernet: 1 x WAN (100 Mbps) and 1 x LAN (100 Mbps)
- USB: 1 x USB 2.0 port
- Button: 1 x switch button, 1 x reset button
- LED: 3 x LEDS (system power led is not GPIO controller)
- UART: 1 x UART on PCB (JP1: 3.3V, RX, TX, GND)

Installation through Luci:
- The original firmware is LEDE, so both LuCI or sysupgrade can be used.
- Do not keep settings, for sysupgrade please use the -n option.

Installation through bootloader webserver:
- Plug power and hold reset button until red LED blink to bright.
- Install sysupgrade image using web interface on 192.168.1.1.

Signed-off-by: Kyson Lok <kysonlok@gmail.com>
[match maximum image size with firmware partition]
Signed-off-by: Mathias Kresin <dev@kresin.me>

1 files changed, 133 insertions, 0 deletions

diff --git a/target/linux/ramips/dts/GL-MT300N-V2.dts b/target/linux/ramips/dts/GL-MT300N-V2.dts
new file mode 100644
index 0000000000..e40c4cf7df
--- /dev/null
+++ b/target/linux/ramips/dts/GL-MT300N-V2.dts
@@ -0,0 +1,133 @@
+/dts-v1/;
+
+#include "mt7628an.dtsi"
+
+#include <dt-bindings/gpio/gpio.h>
+#include <dt-bindings/input/input.h>
+
+/{
+	compatible = "gl-inet,gl-mt300n-v2", "ralink,mt7620an-soc";
+	model = "GL-MT300N-V2";
+
+	chosen {
+		bootargs = "console=ttyS0,115200";
+	};
+
+	memory@0 {
+		device_type = "memory";
+		reg = <0x0 0x8000000>;
+	};
+
+	gpio-leds {
+		compatible = "gpio-leds";
+
+		wan {
+			label = "gl-mt300n-v2:blue:wan";
+			gpios = <&gpio1 11 GPIO_ACTIVE_LOW>;
+		};
+
+		wlan {
+			label = "gl-mt300n-v2:red:wlan";
+			gpios = <&gpio1 12 GPIO_ACTIVE_LOW>;
+		};
+	};
+
+	gpio-keys {
+		compatible = "gpio-keys-polled";
+		#address-cells = <1>;
+		#size-cells = <0>;
+		poll-interval = <20>;
+
+		reset {
+			label = "reset";
+			gpios = <&gpio1 6 GPIO_ACTIVE_LOW>;
+			linux,code = <KEY_RESTART>;
+		};
+
+		BTN_0 {
+			label = "BTN_0";
+			gpios = <&gpio0 0 GPIO_ACTIVE_LOW>;
+			linux,code = <BTN_0>;
+		};
+
+		BTN_1 {
+			label = "BTN_1";
+			gpios = <&gpio0 3 GPIO_ACTIVE_LOW>;
+			linux,code = <BTN_1>;
+		};
+	};
+
+	gpio_export {
+		compatible = "gpio-export";
+		#size-cells = <0>;
+
+		usb {
+			gpio-export,name = "usb";
+			gpio-export,output = <1>;
+			gpios = <&gpio0 11 GPIO_ACTIVE_LOW>;
+		};
+	};
+
+};
+
+&pinctrl {
+	state_default: pinctrl0 {
+		gpio {
+			ralink,group = "wdt", "gpio", "wled_an", "p0led_an", "i2s";
+			ralink,function = "gpio";
+		};
+	};
+};
+
+&ethernet {
+	mtd-mac-address = <&factory 0x4000>;
+};
+
+&wmac {
+	status = "okay";
+	ralink,mtd-eeprom = <&factory 0x0>;
+};
+
+&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>;
+		};
+	};
+};
+
+&ehci {
+	status = "okay";
+};
+
+&ohci {
+	status = "okay";
+};