ath79: add support for gl-ar750

This patch supports gl-ar750, which was previously supported by ar71xx.

Specification:
- SOC: QCA9531 (650MHz)
- Flash: 16 MiB (W25Q128FVSG)
- RAM: 128 MiB DDR2
- Ethernet: 10/100: 2xLAN + 10/100: 1xWAN
- Wireless: 2.4GHz (bgn) and 5GHz (ac)
- USB: 1x USB 2.0 port
- Switch: 1x switch
- Button: 1x reset button
- LED: 3x LEDS (white)

Flash instruction:
Support for sysupgrade directive upgrades, as well as luci upgrades.

Signed-off-by: Luochongjun <luochongjun@gl-inet.com>

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

@@ -156,6 +156,11 @@ ath79_setup_interfaces()
 	etactica,eg200)
 		ucidef_set_interface_lan "eth0" "dhcp"
 		;;
+	glinet,gl-ar750)
+		ucidef_set_interface_wan "eth1"
+		ucidef_add_switch "switch0" \
+			"0@eth0" "1:lan" "2:lan"
+		;;
 	glinet,gl-ar750s)
 		ucidef_add_switch "switch0" \
 			"0@eth0" "2:lan:2" "3:lan:1" "1:wan"

target/linux/ath79/base-files/etc/hotplug.d/firmware/11-ath10k-caldata

@@ -122,6 +122,7 @@ case "$FIRMWARE" in
 		ath10kcal_extract "art" 0x5000 0x844
 		ath10kcal_patch_mac $(macaddr_add $(cat /sys/class/net/eth0/address) +1)
 		;;
+	glinet,gl-ar750|\
 	glinet,gl-ar750s)
 		ath10kcal_extract "art" 0x5000 0x844
 		ath10kcal_patch_mac $(macaddr_add $(mtd_get_mac_binary art 0x0) +1)

target/linux/ath79/dts/qca9531_glinet_gl-ar750.dts

@@ -0,0 +1,142 @@
+// SPDX-License-Identifier: GPL-2.0-or-later OR MIT
+/dts-v1/;
+
+#include <dt-bindings/gpio/gpio.h>
+#include <dt-bindings/input/input.h>
+
+#include "qca953x.dtsi"
+
+/ {
+	compatible = "glinet,gl-ar750", "qca,qca9531";
+	model = "GL.iNet GL-AR750";
+
+	keys {
+		compatible = "gpio-keys";
+
+		pinctrl-names = "default";
+		pinctrl-0 = <&jtag_disable_pins>;
+
+		reset {
+			label = "reset";
+			linux,code = <KEY_RESTART>;
+			gpios = <&gpio 3 GPIO_ACTIVE_LOW>;
+		};
+
+		mode {
+			label = "mode";
+			linux,code = <BTN_0>;
+			gpios = <&gpio 0 GPIO_ACTIVE_LOW>;
+		};
+	};
+
+	leds {
+		compatible = "gpio-leds";
+
+		power {
+			label = "gl-ar750:white:power";
+			gpios = <&gpio 12 GPIO_ACTIVE_LOW>;
+			default-state = "on";
+		};
+
+		wlan2g {
+			label = "gl-ar750:white:wlan2g";
+			gpios = <&gpio 14 GPIO_ACTIVE_LOW>;
+			linux,default-trigger = "phy1tpt";
+		};
+
+		wlan5g {
+			label = "gl-ar750:white:wlan5g";
+			gpios = <&gpio 13 GPIO_ACTIVE_LOW>;
+			linux,default-trigger = "phy0tpt";
+		};
+
+	};
+
+	i2c {
+		compatible = "i2c-gpio";
+
+		sda-gpios = <&gpio 17 GPIO_ACTIVE_LOW>;
+		scl-gpios = <&gpio 16 GPIO_ACTIVE_LOW>;
+	};
+
+
+};
+
+&pcie0 {
+	status = "okay";
+
+	wifi@0,0 {
+		compatible = "qcom,ath10k";
+		reg = <0 0 0 0 0>;
+		device_type = "pci";
+	};
+};
+
+&uart {
+	status = "okay";
+};
+
+&usb0 {
+	status = "okay";
+};
+
+&usb_phy {
+	status = "okay";
+};
+
+&spi {
+	status = "okay";
+	num-cs = <0>;
+
+	flash@0 {
+		compatible = "jedec,spi-nor";
+		reg = <0>;
+		spi-max-frequency = <25000000>;
+
+		partitions {
+			compatible = "fixed-partitions";
+			#address-cells = <1>;
+			#size-cells = <1>;
+
+			partition@0 {
+				label = "u-boot";
+				reg = <0x000000 0x040000>;
+				read-only;
+			};
+
+			partition@40000 {
+				label = "u-boot-env";
+				reg = <0x040000 0x010000>;
+				read-only;
+			};
+
+			art: partition@50000 {
+				label = "art";
+				reg = <0x050000 0x010000>;
+				read-only;
+			};
+
+			partition@60000 {
+				compatible = "denx,uimage";
+				label = "firmware";
+				reg = <0x060000 0xfa0000>;
+			};
+		};
+	};
+};
+
+&eth0 {
+	status = "okay";
+	mtd-mac-address = <&art 0x0>;
+	phy-handle = <&swphy4>;
+};
+
+&eth1 {
+	mtd-mac-address = <&art 0x0>;
+	mtd-mac-address-increment = <1>;
+};
+
+&wmac {
+	status = "okay";
+	mtd-cal-data = <&art 0x1000>;
+};

target/linux/ath79/image/generic.mk

@@ -557,6 +557,16 @@ define Device/glinet_gl-ar300m-nor
 endef
 TARGET_DEVICES += glinet_gl-ar300m-nor
 
+define Device/glinet_gl-ar750
+  ATH_SOC := qca9531
+  DEVICE_VENDOR := GL.iNet
+  DEVICE_MODEL := GL-AR750
+  DEVICE_PACKAGES := kmod-usb2 kmod-ath10k-ct ath10k-firmware-qca9887-ct
+  IMAGE_SIZE := 16000k
+  SUPPORTED_DEVICES += gl-ar750
+endef
+TARGET_DEVICES += glinet_gl-ar750
+
 define Device/glinet_gl-ar750s
   ATH_SOC := qca9563
   DEVICE_VENDOR := GL.iNet