ath79: add support for ALFA Network Tube-2HQ

ALFA Network Tube-2HQ is a successor of the Tube-2H/P series (EOL) which
was based on the Atheros AR9331. The new version uses Qualcomm QCA9531.

Specifications:

- Qualcomm/Atheros QCA9531 v2
- 650/400/200 MHz (CPU/DDR/AHB)
- 64 or 128 MB of RAM (DDR2)
- 16+ MB of flash (SPI NOR)
- 1x 10/100 Mbps Ethernet with passive PoE input (24 V)
  (802.3at/af PoE support with optional module)
- 1T1R 2.4 GHz Wi-Fi with external PA (SE2623L, up to 27 dBm) and LNA
- 1x Type-N (male) antenna connector
- 6x LED (5x driven by GPIO)
- 1x button (reset)
- external h/w watchdog (EM6324QYSP5B, enabled by default)
- UART (4-pin, 2.00 mm pitch) header on PCB

Flash instruction:

You can use sysupgrade image directly in vendor firmware which is based
on LEDE/OpenWrt. Alternatively, you can use web recovery mode in U-Boot:

1. Configure PC with static IP 192.168.1.2/24.
2. Connect PC with one of RJ45 ports, press the reset button, power up
   device, wait for first blink of all LEDs (indicates network setup),
   then keep button for 3 following blinks and release it.
3. Open 192.168.1.1 address in your browser and upload sysupgrade image.

Signed-off-by: Piotr Dymacz <pepe2k@gmail.com>

1 files changed, 65 insertions, 0 deletions

diff --git a/target/linux/ath79/dts/qca9531_alfa-network_tube-2hq.dts b/target/linux/ath79/dts/qca9531_alfa-network_tube-2hq.dts
new file mode 100644
index 0000000000..f81fe287df
--- /dev/null
+++ b/target/linux/ath79/dts/qca9531_alfa-network_tube-2hq.dts
@@ -0,0 +1,65 @@
+// SPDX-License-Identifier: GPL-2.0-or-later OR MIT
+
+#include "qca9531_alfa-network_r36a.dtsi"
+
+/ {
+	model = "ALFA Network Tube-2HQ";
+	compatible = "alfa-network,tube-2hq", "qca,qca9531";
+
+	aliases {
+		led-boot = &led_signal4;
+		led-failsafe = &led_signal4;
+		led-upgrade = &led_signal4;
+	};
+
+	leds {
+		compatible = "gpio-leds";
+
+		pinctrl-names = "default";
+		pinctrl-0 = <&enable_gpio4 &enable_gpio16>;
+
+		lan {
+			label = "blue:lan";
+			gpios = <&gpio 4 GPIO_ACTIVE_LOW>;
+		};
+
+		led_signal4: signal4 {
+			label = "green:signal4";
+			gpios = <&gpio 11 GPIO_ACTIVE_LOW>;
+		};
+
+		signal1 {
+			label = "red:signal1";
+			gpios = <&gpio 12 GPIO_ACTIVE_LOW>;
+		};
+
+		signal2 {
+			label = "orange:signal2";
+			gpios = <&gpio 14 GPIO_ACTIVE_LOW>;
+		};
+
+		signal3 {
+			label = "green:signal3";
+			gpios = <&gpio 16 GPIO_ACTIVE_LOW>;
+		};
+	};
+};
+
+&eth0 {
+	nvmem-cells = <&macaddr_art_1002>;
+	nvmem-cell-names = "mac-address";
+
+	mac-address-increment = <(-1)>;
+};
+
+&eth1 {
+	compatible = "syscon", "simple-mfd";
+};
+
+&usb0 {
+	status = "disabled";
+};
+
+&usb_phy {
+	status = "disabled";
+};