ath79: add support for AVM FRITZ!WLAN Repeater 1750E

This commit adds support for the AVM Fritz!WLAN Repeater 1750E

SOC:	Qualcomm QCA9556 (Scorpion) 720MHz MIPS74Kc
RAM:    64MB Zentel A3R12E40CBF DDR2
FLASH:  16MiB Winbond W25Q128 SPI NOR
WLAN1:  QCA9556 2.4 GHz 802.11b/g/n 3x3
WLAN2:  QCA9880 5 GHz 802.11 n/ac 3x3
INPUT:  WPS button
LED:    Power, WiFi, LAN, RSSI indicator
Serial: Header Next to Black metal shield
        Pinout is 3.3V - RX - TX - GND (Square Pad is 3.3V)
        The Serial setting is 115200-8-N-1.

Tested and working:
 - Ethernet
 - 2.4 GHz WiFi (correct MAC)
 - 5 GHz WiFi (correct MAC)
 - Installation via EVA bootloader
 - OpenWRT sysupgrade
 - Buttons
 - LEDs

Installation via EVA:
In the first seconds after Power is connected, the bootloader will
listen for FTP connections on 192.168.178.1. Firmware can be uploaded
like following:

  ftp> quote USER adam2
  ftp> quote PASS adam2
  ftp> binary
  ftp> debug
  ftp> passive
  ftp> quote MEDIA FLSH
  ftp> put openwrt-sysupgrade.bin mtd1

Note that this procedure might take up to two minutes.
You need to powercycle the Device afterwards to boot OpenWRT.

Signed-off-by: David Bauer <mail@david-bauer.net>

1 files changed, 195 insertions, 0 deletions

diff --git a/target/linux/ath79/dts/qca9556_avm_fritz1750e.dts b/target/linux/ath79/dts/qca9556_avm_fritz1750e.dts
new file mode 100644
index 0000000000..f50af5b228
--- /dev/null
+++ b/target/linux/ath79/dts/qca9556_avm_fritz1750e.dts
@@ -0,0 +1,195 @@
+// 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 "qca9557.dtsi"
+
+/ {
+	compatible = "avm,fritz1750e", "qca,qca9557";
+	model = "AVM FRITZ!WLAN Repeater 1750E";
+
+	chosen {
+		bootargs = "console=ttyS0,115200n8";
+	};
+
+	aliases {
+		led-boot = &led_power;
+		led-failsafe = &led_power;
+		led-running = &led_power;
+		led-upgrade = &led_power;
+	};
+
+	led_spi {
+		compatible = "spi-gpio";
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		sck-gpios = <&gpio 14 GPIO_ACTIVE_HIGH>;
+		mosi-gpios = <&gpio 15 GPIO_ACTIVE_HIGH>;
+		num-chipselects = <0>;
+
+		spi_gpio: led_gpio@0 {
+			compatible = "fairchild,74hc595";
+			reg = <0>;
+			gpio-controller;
+			#gpio-cells = <2>;
+			registers-number = <1>;
+			spi-max-frequency = <10000000>;
+
+			gpio_latch_bit {
+				gpio-hog;
+				gpios = <7 GPIO_ACTIVE_HIGH>;
+				output-high;
+				line-name = "gpio-latch-bit";
+			};
+		};
+	};
+
+	leds {
+		compatible = "gpio-leds";
+
+		led_power: power {
+			label = "fritz1750e:green:power";
+			gpios = <&spi_gpio 6 GPIO_ACTIVE_HIGH>;
+		};
+
+		wlan {
+			label = "fritz1750e:green:wlan";
+			gpios = <&spi_gpio 5 GPIO_ACTIVE_HIGH>;
+			linux,default-trigger = "phy1tpt";
+		};
+
+		lan {
+			label = "fritz1750e:green:lan";
+			gpios = <&gpio 13 GPIO_ACTIVE_HIGH>;
+		};
+
+		rssi0 {
+			label = "fritz1750e:green:rssi0";
+			gpios = <&spi_gpio 0 GPIO_ACTIVE_HIGH>;
+		};
+
+		rssi1 {
+			label = "fritz1750e:green:rssi1";
+			gpios = <&spi_gpio 1 GPIO_ACTIVE_HIGH>;
+		};
+
+		rssi2 {
+			label = "fritz1750e:green:rssi2";
+			gpios = <&spi_gpio 2 GPIO_ACTIVE_HIGH>;
+		};
+
+		rssi3 {
+			label = "fritz1750e:green:rssi3";
+			gpios = <&spi_gpio 3 GPIO_ACTIVE_HIGH>;
+		};
+
+		rssi4 {
+			label = "fritz1750e:green:rssi4";
+			gpios = <&spi_gpio 4 GPIO_ACTIVE_HIGH>;
+		};
+	};
+
+	keys {
+		compatible = "gpio-keys";
+
+		wps {
+			label = "wps";
+			linux,code = <KEY_WPS_BUTTON>;
+			gpios = <&gpio 4 GPIO_ACTIVE_HIGH>;
+		};
+	};
+};
+
+&pcie0 {
+	status = "okay";
+};
+
+&uart {
+	status = "okay";
+};
+
+&spi {
+	status = "okay";
+	num-cs = <1>;
+
+	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 = "urlader";
+				reg = <0x0 0x20000>;
+				read-only;
+			};
+
+			partition@20000 {
+				compatible = "avm,eva-firmware";
+				label = "firmware";
+				reg = <0x20000 0xee0000>;
+			};
+
+			partition@f00000 {
+				label = "tffs (1)";
+				reg = <0xf00000 0x80000>;
+				read-only;
+			};
+
+			partition@f80000 {
+				label = "tffs (2)";
+				reg = <0xf80000 0x80000>;
+				read-only;
+			};
+		};
+	};
+};
+
+&gpio {
+	reset-pcie-ep {
+		gpio-hog;
+		gpios = <17 GPIO_ACTIVE_HIGH>;
+		output-high;
+		line-name = "PCIE EP reset";
+	};
+
+	reset-pcie {
+		gpio-hog;
+		gpios = <18 GPIO_ACTIVE_HIGH>;
+		output-high;
+		line-name = "PCIE Bus reset";
+	};
+};
+
+&wmac {
+	status = "okay";
+	qca,no-eeprom;
+};
+
+&eth1 {
+	status = "okay";
+
+	phy-handle = <&phy0>;
+	pll-data = <0x3000000 0x101 0x1313>;
+
+	gmac-config {
+		device = <&gmac>;
+		ge0-sgmii = <0>;
+	};
+};
+
+&mdio1 {
+	status = "okay";
+
+	phy0: ethernet-phy@0 {
+		reg = <0>;
+		reset-gpios = <&gpio 11 GPIO_ACTIVE_LOW>;
+	};
+};