octeon: add support for Ubiquiti UniFi Security Gateway

Ubiquiti UniFi Security Gateway (USG) is largely identical to
the EdgeRouter Lite (ERLite-3) apart from a different board ID
and two dome leds.

Device data (from WikiDev):
  CPU: Cavium Octeon Plus CN5020 @500MHz 2-cores
  Ethernet: 3x Atheros AR8035-A GbE PHY's
  Flash: On-board 4MB Flash
  Storage: Internal 3.8GB USB Flash (Kingston ID) drive
    w/ 1.5GB free for use occupies single internal USB port.
  Serial: 1x RJ45 port on front panel. 115200, 8N1
  Buttons: 1x Reset

Flash instructions are identical to EdgeRouter Lite.

Signed-off-by: Clemens Hopfer <openwrt@wireloss.net>

1 files changed, 97 insertions, 0 deletions

diff --git a/target/linux/octeon/files/arch/mips/boot/dts/cavium-octeon/cn5020_ubnt_usg.dts b/target/linux/octeon/files/arch/mips/boot/dts/cavium-octeon/cn5020_ubnt_usg.dts
new file mode 100644
index 0000000000..24d8abe4ad
--- /dev/null
+++ b/target/linux/octeon/files/arch/mips/boot/dts/cavium-octeon/cn5020_ubnt_usg.dts
@@ -0,0 +1,97 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Device tree source for Ubiquity UniFi Security Gateway.
+ *
+ * Written for EdgeRouter Lite by: Aaro Koskinen <aaro.koskinen@iki.fi>
+ * Adapted for USG by: Clemens Hopfer <openwrt@wireloss.net>
+ */
+
+/include/ "octeon_3xxx.dtsi"
+#include <dt-bindings/gpio/gpio.h>
+#include <dt-bindings/input/input.h>
+
+/ {
+	compatible = "ubnt,usg";
+	model = "Ubiquiti UniFi Security Gateway";
+
+	soc@0 {
+		smi0: mdio@1180000001800 {
+			phy5: ethernet-phy@5 {
+				reg = <5>;
+				compatible = "ethernet-phy-ieee802.3-c22";
+			};
+			phy6: ethernet-phy@6 {
+				reg = <6>;
+				compatible = "ethernet-phy-ieee802.3-c22";
+			};
+			phy7: ethernet-phy@7 {
+				reg = <7>;
+				compatible = "ethernet-phy-ieee802.3-c22";
+			};
+		};
+
+		pip: pip@11800a0000000 {
+			interface@0 {
+				ethernet@0 {
+					phy-handle = <&phy7>;
+					rx-delay = <0>;
+					tx-delay = <0x10>;
+				};
+				ethernet@1 {
+					phy-handle = <&phy6>;
+					rx-delay = <0>;
+					tx-delay = <0x10>;
+				};
+				ethernet@2 {
+					phy-handle = <&phy5>;
+					rx-delay = <0>;
+					tx-delay = <0x10>;
+				};
+			};
+		};
+
+		uart0: serial@1180000000800 {
+			clock-frequency = <500000000>;
+		};
+
+		usbn: usbn@1180068000000 {
+			refclk-frequency = <12000000>;
+			refclk-type = "crystal";
+		};
+
+	};
+
+	leds {
+		compatible = "gpio-leds";
+
+		led_dome_white: led-0 {
+			label = "white:dome";
+			gpios = <&gpio 0 GPIO_ACTIVE_HIGH>;
+		};
+
+		led_dome_blue: led-1 {
+			label = "blue:dome";
+			gpios = <&gpio 1 GPIO_ACTIVE_HIGH>;
+		};
+	};
+
+	keys {
+		compatible = "gpio-keys-polled";
+		poll-interval = <20>;
+
+		key-restart {
+			label = "reset";
+			linux,code = <KEY_RESTART>;
+			gpios = <&gpio 11 GPIO_ACTIVE_LOW>;
+			debounce-interval = <60>;
+		};
+	};
+
+	aliases {
+		pip = &pip;
+		led-boot = &led_dome_white;
+		led-failsafe = &led_dome_blue;
+		led-running = &led_dome_blue;
+		led-upgrade = &led_dome_blue;
+	};
+};