ramips: add support for TP-Link RE350

The TP-Link RE350 is a wall-wart AC1200 range extender/access point with
a single gigabit ethernet port and two non-detachable antennas, based on
the MT7621A SoC with MT7603E and MT7612E radios.

Firmware wise it is very similar to the QCA based RE450.

SoC: MediaTek MT7621A (880MHz)
Flash: 8MiB (Winbond W25Q64)
RAM:   64MiB (DDR2)
Ethernet: 1x 1Gbit
Wireless: 2T2R 2.4Ghz (MT7603E) and 5GHz (MT7612E)
LEDs: Power, 2.4G, 5G (blue), WPS (red and blue), ethernet link/act
(green)
Buttons: On/off, LED, reset, WPS

Serial header at J1, 57600 8n1:
Pin 1 TX
Pin 2 RX
Pin 3 GND
Pin 4 3.3V

Factory image can be uploaded directly through the stock UI.

Signed-off-by: Alex Maclean <monkeh@monkeh.net>

1 files changed, 164 insertions, 0 deletions

diff --git a/target/linux/ramips/dts/RE350.dts b/target/linux/ramips/dts/RE350.dts
new file mode 100644
index 0000000000..2f3bb1245c
--- /dev/null
+++ b/target/linux/ramips/dts/RE350.dts
@@ -0,0 +1,164 @@
+/dts-v1/;
+
+#include "mt7621.dtsi"
+
+#include <dt-bindings/gpio/gpio.h>
+#include <dt-bindings/input/input.h>
+
+/ {
+	compatible = "tplink,re350-v1", "mediatek,mt7621-soc";
+	model = "TP-LINK RE350 v1";
+
+	memory@0 {
+		device_type = "memory";
+		reg = <0x0 0x4000000>;
+	};
+
+	chosen {
+		bootargs = "console=ttyS0,57600";
+	};
+
+	gpio-leds {
+		compatible = "gpio-leds";
+
+		power {
+			label = "re350-v1:blue:power";
+			gpios = <&gpio0 22 GPIO_ACTIVE_LOW>;
+		};
+
+		wifi2g {
+			label = "re350-v1:blue:wifi2G";
+			gpios = <&gpio0 23 GPIO_ACTIVE_LOW>;
+		};
+
+		wifi5g {
+			label = "re350-v1:blue:wifi5G";
+			gpios = <&gpio0 24 GPIO_ACTIVE_LOW>;
+		};
+
+		wps_r {
+			label = "re350-v1:red:wps";
+			gpios = <&gpio0 25 GPIO_ACTIVE_HIGH>;
+		};
+
+		wps_b {
+			label = "re350-v1:blue:wps";
+			gpios = <&gpio0 26 GPIO_ACTIVE_HIGH>;
+		};
+
+		eth {
+			label = "re350-v1:green:eth_act";
+			gpios = <&gpio0 28 GPIO_ACTIVE_LOW>;
+		};
+
+		eth2 {
+			label = "re350-v1:green:eth_link";
+			gpios = <&gpio0 29 GPIO_ACTIVE_LOW>;
+		};
+	};
+
+	gpio-keys-polled {
+		compatible = "gpio-keys-polled";
+		#address-cells = <1>;
+		#size-cells = <0>;
+		poll-interval = <20>;
+
+		led {
+			label = "led";
+			gpios = <&gpio0 30 GPIO_ACTIVE_LOW>;
+			linux,code = <BTN_0>;
+		};
+
+		reset {
+			label = "reset";
+			gpios = <&gpio0 31 GPIO_ACTIVE_LOW>;
+			linux,code = <KEY_RESTART>;
+		};
+
+		power {
+			label = "power";
+			gpios = <&gpio1 0 GPIO_ACTIVE_LOW>;
+			linux,code = <KEY_POWER>;
+		};
+
+		wps {
+			label = "wps";
+			gpios = <&gpio1 1 GPIO_ACTIVE_LOW>;
+			linux,code = <KEY_WPS_BUTTON>;
+		};
+	};
+};
+
+&spi0 {
+	status = "okay";
+
+	w25q64@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 0x20000>;
+			read-only;
+		};
+
+		partition@20000 {
+			label = "firmware";
+			reg = <0x20000 0x5e0000>;
+		};
+
+		config: partition@600000 {
+			label = "config";
+			reg = <0x600000 0x50000>;
+			read-only;
+		};
+
+		radio: partition@7f0000 {
+			label = "radio";
+			reg = <0x7f0000 0x10000>;
+			read-only;
+		};
+	};
+};
+
+&pcie {
+	status = "okay";
+
+	pcie0 {
+		mt76@0,0 {
+			reg = <0x0000 0 0 0 0>;
+			device_type = "pci";
+			mediatek,mtd-eeprom = <&radio 0>;
+			mtd-mac-address = <&config 0x10008>;
+			mtd-mac-address-increment = <1>;
+		};
+	};
+
+	pcie1 {
+		mt76@1,0 {
+			reg = <0x0000 0 0 0 0>;
+			device_type = "pci";
+			mediatek,mtd-eeprom = <&radio 0x8000>;
+			ieee80211-freq-limit = <5000000 6000000>;
+			mtd-mac-address = <&config 0x10008>;
+			mtd-mac-address-increment = <2>;
+		};
+	};
+};
+
+&ethernet {
+	mtd-mac-address = <&config 0x10008>;
+};
+
+&pinctrl {
+	state_default: pinctrl0 {
+		gpio {
+			ralink,group = "rgmii2", "wdt";
+			ralink,function = "gpio";
+		};
+	};
+};