ramips: add support for Netgear R6220

This patch adds support for the Netgear R6220, aka Netgear AC1200 and
R6220-100NAS.

Specification:
- SoC: MediaTek MT7621ST (880 MHz)
- Falsh: 128 MiB (Macronix MX30LF1G08AA-TI)
- RAM: 128 MiB (Nanya NT5CB64M16FP-DH)
- Wireless: MediaTek MT7603EN b/g/n , MediaTek MT7612EN an+ac
- LAN speed: 10/100/1000
- LAN ports: 4
- WAN speed: 10/100/1000
- WAN ports: 1
- Serial baud rate of Bootloader and factory firmware: 57600

Installation through telnet:
- Copy kernel.bin and rootfs.bin to a USB flash disk, plug to usb port
  on the router.
- Enable telnet with link: http://192.168.1.1/setup.cgi?todo=debug
  (login if required, default: admin password)
- You will see "Debug Enabled!"
- Telnet 192.168.1.1 and login with "root"
- ls /mnt/shares/ to find out path of your USB disk. 'myUdisk' for
  example.
- cd /mnt/shares/myUdisk
- mtd_write write rootfs.bin Rootfs
- mtd_write write kernel.bin Kernel
- reboot

nmrpflash can be used to recover to the netgear firmware if a broken
image was flashed.

Signed-off-by: Hanqing Wong <hquu@outlook.com>

1 files changed, 156 insertions, 0 deletions

diff --git a/target/linux/ramips/dts/R6220.dts b/target/linux/ramips/dts/R6220.dts
new file mode 100644
index 0000000000..72c6fc7d5a
--- /dev/null
+++ b/target/linux/ramips/dts/R6220.dts
@@ -0,0 +1,156 @@
+/dts-v1/;
+
+#include "mt7621.dtsi"
+
+#include <dt-bindings/gpio/gpio.h>
+#include <dt-bindings/input/input.h>
+
+/ {
+	model = "Netgear R6220";
+
+	memory@0 {
+		device_type = "memory";
+		reg = <0x0 0x8000000>;
+	};
+
+	chosen {
+		bootargs = "console=ttyS0,57600";
+	};
+
+	gpio-leds {
+		compatible = "gpio-leds";
+
+		power {
+			label = "r6220:green:power";
+			gpios = <&gpio0 18 GPIO_ACTIVE_LOW>;
+		};
+
+		usb {
+			label = "r6220:green:usb";
+			gpios = <&gpio0 15 GPIO_ACTIVE_LOW>;
+		};
+
+		internet {
+			label = "r6220:green:wan";
+			gpios = <&gpio0 13 GPIO_ACTIVE_LOW>;
+		};
+
+		wifi {
+			label = "r6220:green:wifi";
+			gpios = <&gpio0 16 GPIO_ACTIVE_LOW>;
+		};
+
+		wps {
+			label = "r6220:green:wps";
+			gpios = <&gpio0 12 GPIO_ACTIVE_LOW>;
+		};
+	};
+
+	gpio-keys-polled {
+		compatible = "gpio-keys-polled";
+		#address-cells = <1>;
+		#size-cells = <0>;
+		poll-interval = <20>;
+
+		wps {
+			label = "wps";
+			gpios = <&gpio0 7 GPIO_ACTIVE_HIGH>;
+			linux,code = <KEY_WPS_BUTTON>;
+		};
+
+		wifi {
+			label = "wifi";
+			gpios = <&gpio0 8 GPIO_ACTIVE_HIGH>;
+			linux,code = <KEY_RFKILL>;
+		};
+
+		reset {
+			label = "reset";
+			gpios = <&gpio0 14 GPIO_ACTIVE_HIGH>;
+			linux,code = <KEY_RESTART>;
+		};
+	};
+
+	gpio_export {
+		compatible = "gpio-export";
+		#size-cells = <0>;
+
+		usbpower {
+			gpio-export,name = "usbpower";
+			gpio-export,output = <1>;
+			gpios = <&gpio0 10 GPIO_ACTIVE_LOW>;
+		};
+	};
+};
+
+&nand {
+	status = "okay";
+
+	partition@0 {
+		label = "u-boot";
+		reg = <0x0 0x100000>;
+		read-only;
+	};
+
+	partition@100000 {
+		label = "SC PID";
+		reg = <0x100000 0x100000>;
+		read-only;
+	};
+
+	partition@200000 {
+		label = "kernel";
+		reg = <0x200000 0x400000>;
+	};
+
+	partition@600000 {
+		label = "ubi";
+		reg = <0x600000 0x1c00000>;
+	};
+
+	factory: partition@2e00000 {
+		label = "factory";
+		reg = <0x2e00000 0x100000>;
+		read-only;
+	};
+
+	partition@4200000 {
+		label = "reserved";
+		reg = <0x4200000 0x3c00000>;
+	};
+};
+
+&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>;
+		};
+	};
+};
+
+&ethernet {
+	mtd-mac-address = <&factory 0x00000004>;
+};
+
+&pinctrl {
+	state_default: pinctrl0 {
+		gpio {
+			ralink,group = "uart3", "jtag";
+			ralink,function = "gpio";
+		};
+	};
+};