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>

1 files changed, 132 insertions, 0 deletions

diff --git a/target/linux/ath79/dts/qca9531_comfast_cf-ew72.dts b/target/linux/ath79/dts/qca9531_comfast_cf-ew72.dts
new file mode 100644
index 0000000000..06c8f0737e
--- /dev/null
+++ b/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>;
+};