ath79: add support for Comfast CF-EW72

Specifications:
Qualcomm/Atheros QCA9531 + QCA9886
2x 10/100 Mbps Ethernet, with 48v PoE
2T2R 2.4 GHz, 802.11b/g/n
2T2R 5 GHz, 802.11a/n/ac
128MB RAM
16MB SPI Flash
4x LED (Always On Power, LAN, WAN, WLAN)

Flashing Instructions:
Original firmware is based on OpenWRT, so flashing the sysupgrade image on
the factory firmware is sufficient.

Tested: Reset button, WAN LED, LAN LED, Power LED (always on, not much
to test), WLAN LED (one LED only for 2 interfaces, by default it gets
assigned to the first interface), MAC addresses (match factory firmware).
My LAN factory MAC address ends in F2.

use	stock_mac	art_loc
lan	:f2		0x0
wan	:f3		0x1002
5g	:f4		0x6
2g	:f5		0x5006

Since MAC address flash locations do not really match their use in vendor
firmware (e.g. address from 5 GHz calibration data is assigned to 2.4 GHz
WiFi), just calculate the MAC addresses with an offset based on 0x0 address.

Signed-off-by: Chris Morgan <macromorgan@hotmail.com>
[add MAC address comment]
Signed-off-by: Adrian Schmutzler <freifunk@adrianschmutzler.de>

target/linux/ath79/dts/qca9531_comfast_cf-ew72.dts

@@ -0,0 +1,132 @@
+// 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 = "comfast,cf-ew72", "qca,qca9531";
+	model = "COMFAST CF-EW72";
+
+	aliases {
+		serial0 = &uart;
+		led-boot = &led_wan;
+		led-failsafe = &led_wan;
+		led-upgrade = &led_wan;
+	};
+
+	leds {
+		compatible = "gpio-leds";
+
+		pinctrl-names = "default";
+		pinctrl-0 = <&jtag_disable_pins>;
+
+		lan {
+			label = "cf-ew72:blue:lan";
+			gpios = <&gpio 2 GPIO_ACTIVE_LOW>;
+		};
+
+		led_wan: wan {
+			label = "cf-ew72:blue:wan";
+			gpios = <&gpio 11 GPIO_ACTIVE_LOW>;
+		};
+
+		wlan {
+			label = "cf-ew72:blue:wlan";
+			gpios = <&gpio 14 GPIO_ACTIVE_LOW>;
+			linux,default-trigger = "phy0tpt";
+		};
+	};
+
+	keys {
+		compatible = "gpio-keys";
+
+		reset {
+			label = "reset";
+			linux,code = <KEY_RESTART>;
+			gpios = <&gpio 17 GPIO_ACTIVE_LOW>;
+			debounce-interval = <60>;
+		};
+	};
+
+	watchdog {
+		compatible = "linux,wdt-gpio";
+
+		gpios = <&gpio 13 GPIO_ACTIVE_LOW>;
+		hw_algo = "toggle";
+		hw_margin_ms = <1200>;
+		always-running;
+	};
+};
+
+&pcie0 {
+	status = "okay";
+};
+
+&spi {
+	status = "okay";
+
+	num-cs = <1>;
+
+	flash@0 {
+		compatible = "winbond,w25q128", "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 0x010000>;
+				read-only;
+			};
+
+			art: partition@10000 {
+				label = "art";
+				reg = <0x010000 0x010000>;
+				read-only;
+			};
+
+			partition@20000 {
+				compatible = "denx,uimage";
+				label = "firmware";
+				reg = <0x020000 0xfd0000>;
+			};
+
+			partition@ff0000 {
+				label = "nvram";
+				reg = <0xff0000 0x010000>;
+				read-only;
+			};
+		};
+	};
+};
+
+&uart {
+	status = "okay";
+};
+
+&eth0 {
+	status = "okay";
+
+	phy-handle = <&swphy4>;
+	mtd-mac-address = <&art 0x0>;
+	mtd-mac-address-increment = <1>;
+};
+
+&eth1 {
+	mtd-mac-address = <&art 0x0>;
+};
+
+&wmac {
+	status = "okay";
+
+	mtd-cal-data = <&art 0x1000>;
+	mtd-mac-address = <&art 0x0>;
+	mtd-mac-address-increment = <3>;
+};

target/linux/ath79/generic/base-files/etc/board.d/01_leds

@@ -80,6 +80,10 @@ comfast,cf-e560ac)
 	ucidef_set_led_switch "lan3" "LAN3" "$boardname:blue:lan3" "switch0" "0x08"
 	ucidef_set_led_switch "lan4" "LAN4" "$boardname:blue:lan4" "switch0" "0x10"
 	;;
+comfast,cf-ew72)
+	ucidef_set_led_switch "lan" "LAN" "$boardname:blue:lan" "switch0" "0x02"
+	ucidef_set_led_netdev "wan" "WAN" "$boardname:blue:wan" "eth1"
+	;;
 devolo,magic-2-wifi)
 	ucidef_set_led_netdev "plcw" "dLAN" "devolo:white:dlan" "eth0.1" "rx"
 	;;

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

@@ -140,7 +140,8 @@ case "$FIRMWARE" in
 			/lib/firmware/ath10k/QCA9888/hw2.0/board.bin
 		rm /lib/firmware/ath10k/QCA9888/hw2.0/board-2.bin
 		;;
-	comfast,cf-e560ac)
+	comfast,cf-e560ac|\
+	comfast,cf-ew72)
 		caldata_extract "art" 0x5000 0x2f20
 		ath10k_patch_mac $(macaddr_add $(mtd_get_mac_binary art 0x0) +2)
 		ln -sf /lib/firmware/ath10k/pre-cal-pci-0000\:00\:00.0.bin \

target/linux/ath79/image/generic.mk

@@ -326,6 +326,16 @@ define Device/comfast_cf-e560ac
 endef
 TARGET_DEVICES += comfast_cf-e560ac
 
+define Device/comfast_cf-ew72
+  SOC := qca9531
+  DEVICE_VENDOR := COMFAST
+  DEVICE_MODEL := CF-EW72
+  DEVICE_PACKAGES := kmod-usb2 kmod-ath10k-ct ath10k-firmware-qca9888-ct \
+	-uboot-envtools -swconfig
+  IMAGE_SIZE := 16192k
+endef
+TARGET_DEVICES += comfast_cf-ew72
+
 define Device/comfast_cf-wr650ac-v1
   SOC := qca9558
   DEVICE_VENDOR := COMFAST