ramips: add new device ZyXEL Keenetic as kn

This device exactly same as NBG-419N but with USB port and USB Led.

Specification:

- SoC: Ralink RT3052 (MIPS24Kc) @384MHz
- RAM: 32 MiB
- Flash: 8 MiB
- WLAN: WiSoC 2T2R/300Mbps (2.4GHz)
- LAN: 4x100M
- WAN: 1x100M
- USB: 1x2.0

Installation via serial console (57600 8N1) from TFTP server
 - rename the firmware to something shorter, for example
   "sysupgrade.bin" (max. 32 chars)
 - copy firmware TFTP server's directory
 - when you power on device, and see U-Boot log, immediatly push "2"
   once.
 - You will see this message:
     2: System Load Linux Kernel then write to Flash via TFTP.
        Warning!! Erase Linux in Flash then burn new one. Are you sure?
 - Push "y", and enter: device IP, then TFTP server's IP, and then
   image firmware file name.

The firmware will be downloaded within ~30 seconds and flashed to the
device (It will take about 2 minutes).

Signed-off-by: Alexey Belyaev <spider@spider.vc>
[squash commits, compact commit message, fix compatible string, remove
superfluous pinmuxes]
Signed-off-by: Mathias Kresin <dev@kresin.me>

1 files changed, 113 insertions, 0 deletions

diff --git a/target/linux/ramips/dts/kn.dts b/target/linux/ramips/dts/kn.dts
new file mode 100644
index 0000000000..77b047c094
--- /dev/null
+++ b/target/linux/ramips/dts/kn.dts
@@ -0,0 +1,113 @@
+/dts-v1/;
+
+#include "rt3050.dtsi"
+
+#include <dt-bindings/gpio/gpio.h>
+#include <dt-bindings/input/input.h>
+
+/ {
+	compatible = "zyxel,keenetic", "ralink,rt3052-soc";
+	model = "ZyXEL Keenetic";
+
+	cfi@1f000000 {
+		compatible = "cfi-flash";
+		reg = <0x1f000000 0x800000>;
+		bank-width = <2>;
+		device-width = <2>;
+		#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 {
+			label = "firmware";
+			reg = <0x50000 0x3b0000>;
+		};
+	};
+
+	gpio-leds {
+		compatible = "gpio-leds";
+
+		power {
+			label = "kn:green:power";
+			gpios = <&gpio0 9 GPIO_ACTIVE_LOW>;
+		};
+
+		usb {
+			label = "kn:green:usb";
+			gpios = <&gpio0 13 GPIO_ACTIVE_LOW>;
+		};
+
+		wps {
+			label = "kn:green:wps";
+			gpios = <&gpio0 14 GPIO_ACTIVE_LOW>;
+		};
+	};
+
+	gpio-keys-polled {
+		compatible = "gpio-keys-polled";
+		#address-cells = <1>;
+		#size-cells = <0>;
+		poll-interval = <20>;
+
+		reset {
+			label = "reset";
+			gpios = <&gpio0 10 GPIO_ACTIVE_LOW>;
+			linux,code = <KEY_RESTART>;
+		};
+
+		rfkill {
+			label = "rfkill";
+			gpios = <&gpio0 12 GPIO_ACTIVE_HIGH>;
+			linux,code = <KEY_RFKILL>;
+			linux,input-type = <EV_SW>;
+		};
+
+		wps {
+			label = "wps";
+			gpios = <&gpio0 0 GPIO_ACTIVE_LOW>;
+			linux,code = <KEY_WPS_BUTTON>;
+		};
+	};
+};
+
+&pinctrl {
+	state_default: pinctrl0 {
+		gpio {
+			ralink,group = "uartf";
+			ralink,function = "gpio";
+		};
+	};
+};
+
+&ethernet {
+	mtd-mac-address = <&factory 0x28>;
+};
+
+&esw {
+	mediatek,portmap = <0x2f>;
+};
+
+&wmac {
+	ralink,mtd-eeprom = <&factory 0>;
+};
+
+&otg {
+	status = "okay";
+};