openwrt/target/linux/ramips/dts/mt7621_comfast_cf-ew72-v2.dts

// SPDX-License-Identifier: GPL-2.0-or-later OR MIT

#include "mt7621.dtsi"

#include <dt-bindings/gpio/gpio.h>
#include <dt-bindings/input/input.h>
#include <dt-bindings/leds/common.h>

/ {
	compatible = "comfast,cf-ew72-v2", "mediatek,mt7621-soc";
	model = "COMFAST CF-EW72 V2";
	
	// There are at least two HW variants of cf-ew72-v2: 
	// With external RAM chip and with integrated RAM (RAM chip not soldered).
	// Both act same.

	chosen {
		bootargs = "console=ttyS0,115200";
	};

	keys {
		compatible = "gpio-keys";

		reset {
			label = "reset";
			gpios = <&gpio 18 GPIO_ACTIVE_LOW>;
			linux,code = <KEY_RESTART>;
			debounce-interval = <60>;
		};
	};

	leds {
		compatible = "gpio-leds";

		// The only both visible and controllable indicator is wifi LED.
		// CF-EW72 have 8 LEDs: 
		//  "wlan" is the only LED is controllable with GPIO and have proper hole in shell.
		//  "power", "wan" and "lan" LEDs have proper holes in shell, but can not be controlled with GPIO
		//  "hidden_led_2" and "hidden_led_4" can be controlled with GPIO, but have no proper holes in shell
		//     "hidden_led_2" is between POWER and WAN LEDs
		//     "hidden_led_4" is between WAN and LAN LEDs
		//  "noconn_led_6" and "noconn_led_8" exist, but have no proper holes in shell and not controlled:
		//     "noconn_led_6" is between LAN and WLAN LEDs
		//     "noconn_led_8" is after WLAN LED
		
		// LED "hidden_led_2" between POWER and WAN LEDs is controllable with GPIO, but it has no proper hole in shell;
		// LED "hidden_led_4" between WAN and LAN LEDs is controllable with GPIO, but it has no proper hole in shell;

		// TABLE of LEDs. All leds are blue.
		//
		// Place (WAN->ANT) | Num | GPIO | LED name (LuCI)   | Note
		// -----------------|-----|-----------------------------------------------------------------------------------------         
		//            power | 1   |      |                   | POWER LED. Not controlled with GPIO.
		//     hidden_led_2 | 2   | 13   | blue:hidden_led_2 | This LED does not have proper hole in shell.
		//              wan | 3   |      |                   | WAN LED. Not controlled with GPIO.
		//     hidden_led_4 | 4   | 16   | blue:hidden_led_4 | This LED does not have proper hole in shell.
		//              lan | 5   |      |                   | LAN LED. Not controlled with GPIO.
		//     noconn_led_6 | 6   |      |                   | Not controlled with GPIO, possibly not connected
		//             wlan | 7   | 15   | blue:wlan         | WLAN LED. Wireless indicator.
		//     noconn_led_8 | 8   |      |                   | Not controlled with GPIO, possibly not connected

		hidden_led_2_blue {
			label = "blue:hidden_led_2";
			gpios = <&gpio 13 GPIO_ACTIVE_LOW>;
		};

		hidden_led_4_blue {
			label = "blue:hidden_led_4";
			gpios = <&gpio 16 GPIO_ACTIVE_LOW>;
		};

		wlan_blue {
			label = "blue:wlan";
			gpios = <&gpio 15 GPIO_ACTIVE_LOW>;
		};
	};

	aliases {
		label-mac-device = &wan;
	};
};

&spi0 {
	status = "okay";

	flash@0 {
		compatible = "w25q128";
		reg = <0>;
		spi-max-frequency = <10000000>;
		m25p,fast-read;
		partitions {
			compatible = "fixed-partitions";
			#address-cells = <1>;
			#size-cells = <1>;

			partition@0 {
				label = "Bootloader";
				reg = <0x0 0x30000>;
				read-only;
			};
			
			partition@30000 {
				label = "Config";
				reg = <0x30000 0x10000>;
				read-only;
			};
			
			factory: partition@40000  {
				label = "factory";
				compatible = "nvmem-cells";
				reg = <0x40000 0x10000>;
				read-only;

				nvmem-layout {
					compatible = "fixed-layout";
					#address-cells = <1>;
					#size-cells = <1>;

					eeprom_factory_0: eeprom@0 {
						reg = <0x0 0x400>;
					};

					eeprom_factory_8000: eeprom@8000 {
						reg = <0x8000 0x4da8>;
					};

					macaddr_factory_e000: macaddr@e000 {
						compatible = "mac-base";
						reg = <0xe000 0x6>;
						#nvmem-cell-cells = <1>;
					};

					// Serial number can be found in "factory" at 0xE100. 
					//   it starts and ends with double quotes `"` and is ASCII string
				};
			};
			
			partition@50000  {
				label = "firmware";
				compatible = "denx,uimage";
				reg = <0x50000 0xfb0000>;
			};
		};
	};
};

&gpio {
	groups = "i2c", "uart2", "uart3", "sdhci", "jtag";
	function = "gpio";
};

&gmac0 {
	nvmem-cells = <&macaddr_factory_e000 0>;
	nvmem-cell-names = "mac-address";
};

&pcie {
	status = "okay";
};

&pcie0 {
	wifi_2_4_ghz: wifi@0,0 {
		compatible = "mediatek,mt76";
		reg = <0x0000 0 0 0 0>;
		nvmem-cells = <&eeprom_factory_0>;
		nvmem-cell-names = "eeprom";
		// Wi-Fi device reads it's MAC address from EEPROM (&factory + 4)
		// adding anything related to mac-address here will cause use random MAC
	};
};

&pcie1 {
	wifi_5_0_ghz: wifi@0,0 {
		compatible = "mediatek,mt76";
		reg = <0x0000 0 0 0 0>;
		nvmem-cells = <&eeprom_factory_8000>;
		nvmem-cell-names = "eeprom";
		// Wi-Fi device reads it's MAC address from EEPROM, (&factory + 0x8000 + 4)
		// adding anything related to mac-address here will cause use random MAC.
	};
};

&pcie2 {
	status = "disabled";
};

&switch0 {
	mediatek,mcm;
	ports {
		wan: port@0 {
			status = "okay";
			label = "wan";
			nvmem-cells = <&macaddr_factory_e000 1>;
			nvmem-cell-names = "mac-address";
		};
		
		lan: port@1 {
			status = "okay";
			label = "lan";
			nvmem-cells = <&macaddr_factory_e000 0>;
			nvmem-cell-names = "mac-address";
		};
	};
};