ath79: add support for Wallys DR531

Wallys DR531 is based on Qualcomm Atheros QCA9531 v2. Support for this
device was first introduced in e767980eb8 (ar71xx target).

Specifications:

- Qualcomm/Atheros QCA9531 v2
- 550/400/200 MHz (CPU/DDR/AHB)
- 2x 10/100 Mbps Ethernet
- 64 MB of RAM (DDR2)
- 8 MB of flash (SPI NOR)
- 2T2R 2.4 GHz Wi-Fi, with external PA (SE2576L), up to 30 dBm
- 2x MMCX connectors (optional IPEX/U.FL)
- mini PCIe connector (PCIe/USB buses and mini SIM slot)
- 7x LED, 1x button, 1x optional buzzer
- UART, JTAG and LED headers on PCB

Flash instruction (do it under U-Boot, using UART):

  tftpb 0x80060000 openwrt-ath79-...-dr531-squashfs-sysupgrade.bin
  erase 0x9f050000 +$filesize
  cp.b $fileaddr 0x9f050000 $filesize
  setenv bootcmd "bootm 0x9f050000"
  saveenv && reset

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

1 files changed, 158 insertions, 0 deletions

diff --git a/target/linux/ath79/dts/qca9531_wallys_dr531.dts b/target/linux/ath79/dts/qca9531_wallys_dr531.dts
new file mode 100644
index 0000000000..a31e24b7cc
--- /dev/null
+++ b/target/linux/ath79/dts/qca9531_wallys_dr531.dts
@@ -0,0 +1,158 @@
+// SPDX-License-Identifier: GPL-2.0-or-later OR MIT
+
+#include "qca953x.dtsi"
+
+#include <dt-bindings/gpio/gpio.h>
+#include <dt-bindings/input/input.h>
+
+/ {
+	model = "Wallys DR531";
+	compatible = "wallys,dr531", "qca,qca9531";
+
+	aliases {
+		label-mac-device = &eth1;
+		led-boot = &led_sig4;
+		led-failsafe = &led_sig4;
+		led-upgrade = &led_sig4;
+	};
+
+	gpio-export {
+		compatible = "gpio-export";
+
+		buzzer {
+			gpio-export,name = "buzzer";
+			gpio-export,output = <0>;
+			gpios = <&gpio 4 GPIO_ACTIVE_HIGH>;
+		};
+	};
+
+	keys {
+		compatible = "gpio-keys";
+
+		reset {
+			label = "reset";
+			linux,code = <KEY_RESTART>;
+			gpios = <&gpio 17 GPIO_ACTIVE_LOW>;
+			debounce-interval = <60>;
+		};
+	};
+
+	leds {
+		compatible = "gpio-leds";
+
+		lan {
+			label = "dr531:green:lan";
+			gpios = <&gpio 14 GPIO_ACTIVE_LOW>;
+		};
+
+		led_sig4: sig4 {
+			label = "dr531:green:sig4";
+			gpios = <&gpio 13 GPIO_ACTIVE_LOW>;
+		};
+
+		sig1 {
+			label = "dr531:green:sig1";
+			gpios = <&gpio 12 GPIO_ACTIVE_LOW>;
+		};
+
+		sig2 {
+			label = "dr531:green:sig2";
+			gpios = <&gpio 16 GPIO_ACTIVE_LOW>;
+		};
+
+		sig3 {
+			label = "dr531:green:sig3";
+			gpios = <&gpio 15 GPIO_ACTIVE_LOW>;
+		};
+
+		wan {
+			label = "dr531:green:wan";
+			gpios = <&gpio 11 GPIO_ACTIVE_LOW>;
+		};
+	};
+};
+
+&eth0 {
+	status = "okay";
+
+	phy-handle = <&swphy4>;
+	mtd-mac-address = <&env 0xf818>;
+};
+
+&eth1 {
+	/* Workaround: keep the Ethernet interfaces order/mapping correct
+	 * (GMAC0 -> eth0, GMAC1 -> eth1, same as in old ar71xx target) */
+	compatible = "qca,qca9530-eth", "syscon", "simple-mfd";
+
+	mtd-mac-address = <&env 0xf810>;
+};
+
+&pcie0 {
+	status = "okay";
+};
+
+&spi {
+	status = "okay";
+
+	num-cs = <1>;
+
+	flash@0 {
+		compatible = "jedec,spi-nor";
+		reg = <0>;
+		spi-max-frequency = <50000000>;
+		m25p,fast-read;
+
+		partitions {
+			compatible = "fixed-partitions";
+			#address-cells = <1>;
+			#size-cells = <1>;
+
+			partition@0 {
+				label = "u-boot";
+				reg = <0x000000 0x030000>;
+				read-only;
+			};
+
+			env: partition@30000 {
+				label = "u-boot-env";
+				reg = <0x030000 0x010000>;
+			};
+
+			partition@40000 {
+				label = "partition-table";
+				reg = <0x040000 0x010000>;
+				read-only;
+			};
+
+			partition@50000 {
+				compatible = "denx,uimage";
+				label = "firmware";
+				reg = <0x050000 0x7a0000>;
+			};
+
+			art: partition@7f0000 {
+				label = "art";
+				reg = <0x7f0000 0x010000>;
+				read-only;
+			};
+		};
+	};
+};
+
+&uart {
+	status = "okay";
+};
+
+&usb0 {
+	status = "okay";
+};
+
+&usb_phy {
+	status = "okay";
+};
+
+&wmac {
+	status = "okay";
+
+	mtd-cal-data = <&art 0x1000>;
+};