ath79: add support for Ubiquiti EdgeSwitch/ToughSwitch 5XP

The Ubiquiti ToughSwitch 5XP is a 5-port PoE Gigabit switch with a single
Fast-Ethernet management port. It supports both 24V passive PoE out on all
five ports.

Flash:    8 MB
RAM:      64 MB
SoC:      AR7242
Switch:   ar8327
USB:      1x USB 2.0
Ethernet: 5x GbE, 1x FE

Installation of the firmware is possible either via serial + tftpboot or
the factory firmware update function via webinterface.

By default the single Fast-Ethernet port labeled "MGMT" is configured
as the WAN port. Thus access to the device is only possible via the
five switch ports.

Serial: 3v3 115200 8n1

The serial header is located in the lower left corner of the switches PCB:

```
|
|
|
| o
| o RX
| o TX
| o GND
|
|
++  +-++-+  ++  ++  +
+--+ ++ +--++--++--+
```

Signed-off-by: Tobias Schramm <tobleminer@gmail.com>
[remove ubnt,sw compatible - fix spelling - wrap commit message -
remove superfluous phy-mode property]
Signed-off-by: David Bauer <mail@david-bauer.net>

target/linux/ath79/dts/ar7242_ubnt_edgeswitch-5xp.dts

@@ -0,0 +1,77 @@
+// SPDX-License-Identifier: GPL-2.0-or-later OR MIT
+/dts-v1/;
+
+#include "ar7242_ubnt_sw.dtsi"
+
+/ {
+	compatible = "ubnt,edgeswitch-5xp", "qca,ar7242";
+	model = "Ubiquiti EdgeSwitch 5XP";
+
+	gpio-export {
+		compatible = "gpio-export";
+
+		poe_24v_port1 {
+			gpio-export,name = "ubnt:24v-poe:port1";
+			gpio-export,output = <0>;
+			gpios = <&gpio_hc595 1 GPIO_ACTIVE_HIGH>;
+		};
+
+		poe_24v_port2 {
+			gpio-export,name = "ubnt:24v-poe:port2";
+			gpio-export,output = <0>;
+			gpios = <&gpio_hc595 3 GPIO_ACTIVE_HIGH>;
+		};
+
+		poe_24v_port3 {
+			gpio-export,name = "ubnt:24v-poe:port3";
+			gpio-export,output = <0>;
+			gpios = <&gpio_hc595 5 GPIO_ACTIVE_HIGH>;
+		};
+
+		poe_24v_port4 {
+			gpio-export,name = "ubnt:24v-poe:port4";
+			gpio-export,output = <0>;
+			gpios = <&gpio_hc595 7 GPIO_ACTIVE_HIGH>;
+		};
+
+		poe_24v_port5 {
+			gpio-export,name = "ubnt:24v-poe:port5";
+			gpio-export,output = <0>;
+			gpios = <&gpio_hc595 9 GPIO_ACTIVE_HIGH>;
+		};
+	};
+};
+
+&mdio0 {
+	status = "okay";
+
+	phy0: ethernet-switch@0 {
+		compatible = "qca,ar8327";
+		reg = <0x0>;
+
+		qca,ar8327-initvals = <
+			0x04 0x05100000 /* PORT0 PAD MODE CTRL */
+			0x0c 0x05100000 /* PORT6 PAD MODE CTRL */
+			0x50 0x40004000 /* LED_CTRL0 */
+			0x54 0x40004000 /* LED_CTRL1 */
+			0x58 0x40004000 /* LED_CTRL2 */
+			0x5c 0x03ffff00 /* LED_CTRL3 */
+			0x7c 0x0000007e /* PORT0_STATUS */
+			0x94 0x0000007e /* PORT6_STATUS */
+		>;
+	};
+};
+
+&eth0 {
+	status = "okay";
+
+	phy-handle = <&phy0>;
+	phy-mode = "rgmii";
+
+	mtd-mac-address = <&art 0x0>;
+
+	fixed-link {
+		speed = <1000>;
+		full-duplex;
+	};
+};

target/linux/ath79/generic/base-files/etc/board.d/02_network

@@ -259,6 +259,11 @@ ath79_setup_interfaces()
 		ucidef_add_switch "switch0" \
 			"0@eth0" "2:lan:1" "3:lan:3" "4:lan:2"
 		;;
+	ubnt,edgeswitch-5xp)
+		ucidef_set_interface_wan "eth1"
+		ucidef_add_switch "switch0" \
+			"0@eth0" "1:lan" "2:lan" "3:lan" "4:lan" "5:lan"
+		;;
 	ubnt,edgeswitch-8xp)
 		ucidef_set_interface_wan "eth1"
 		ucidef_add_switch "switch0" \

target/linux/ath79/image/generic-ubnt.mk

@@ -129,6 +129,12 @@ define Device/ubnt_bullet-m-xw
 endef
 TARGET_DEVICES += ubnt_bullet-m-xw
 
+define Device/ubnt_edgeswitch-5xp
+  $(Device/ubnt-sw)
+  DEVICE_MODEL := EdgeSwitch 5XP
+endef
+TARGET_DEVICES += ubnt_edgeswitch-5xp
+
 define Device/ubnt_edgeswitch-8xp
   $(Device/ubnt-sw)
   DEVICE_MODEL := EdgeSwitch 8XP