Change the Device Tree Source in OpenWRT 22.03 for Omega2

[mohamedkallel]

In our company, we are using Omega2 chipsets in our IOT bridge solution.
we were running OpenWRT18, and we are looking to bring up to openwrt 22.03.

I used the GitHub onion repo (https://github.com/OnionIoT/openwrt.git) to build openWRT 22.03.

I tried to change the Device Tree to fit our Board. so I used the following dts files:

OMEGA2.dts:

/dts-v1/;

#include "OMEGA2.dtsi"

/ {
	compatible = "onion,omega2", "mediatek,mt7628an-soc";
	model = "Onion Omega2";

	memory@0 {
		device_type = "memory";
		reg = <0x0 0x4000000>;
	};

	gpio-leds {
		compatible = "gpio-leds";

		ethernet {
			label = "ryse:blue:ethernet";
			gpios = <&gpio0 14 GPIO_ACTIVE_HIGH>;
       	};

		internet {
			label = "ryse:blue:internet";
			gpios = <&gpio0 15 GPIO_ACTIVE_HIGH>;
       	};
	};
};

&firmware {
	reg = <0x50000 0xf30000>;
};

&flash {
	user: partition@f80000 {
		label = "user";
		reg = <0xf80000 0x80000>;
	};
};

&system_led {
	label = "omega2:amber:system";
};

OMEGA2.dtsi:

#include "mt7628an.dtsi"

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

/ {
	compatible = "onion,omega2", "mediatek,mt7628an-soc";

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

	gpio-leds {
		compatible = "gpio-leds";

		system_led: system {
			gpios = <&gpio1 12 GPIO_ACTIVE_LOW>;
		};
	};

	gpio-keys-polled {
		compatible = "gpio-keys-polled";
		#address-cells = <1>;
		#size-cells = <0>;
		poll-interval = <20>;

		reset {
			label = "reset";
			gpios = <&gpio1 6 GPIO_ACTIVE_HIGH>;
			linux,code = <KEY_RESTART>;
		};
	};
};

&pinctrl {
	state_default: pinctrl0 {
		gpio {
			ralink,group = "gpio";
			ralink,function = "gpio";
		};

		perst {
			ralink,group = "perst";
			ralink,function = "gpio";
		};

		refclk {
			ralink,group = "refclk";
			ralink,function = "gpio";
		};

		i2s {
			ralink,group = "i2s";
			ralink,function = "gpio";
		};

		spis {
			ralink,group = "spis";
			ralink,function = "gpio";
		};

		wled_kn {
			ralink,group = "wled_kn";
			ralink,function = "gpio";
		};

		wled_an {
			ralink,group = "wled_an";
			ralink,function = "gpio";
		};

		wdt {
			ralink,group = "wdt";
			ralink,function = "gpio";
		};

		pwm0 {
			ralink,group = "pwm0";
			ralink,function = "gpio";
		};

		pwm1 {
			ralink,group = "pwm1";
			ralink,function = "gpio";
		};
	};
};

&gpio1 {
	status = "okay";
};

&gpio2 {
	status = "okay";
};

&spi0 {
	status = "okay";

	pinctrl-names = "default";
	pinctrl-0 = <&spi_pins>, <&spi_cs1_pins>;

	flash: m25p80@0 {
		#address-cells = <1>;
		#size-cells = <1>;
		compatible = "jedec,spi-nor";
		reg = <0>;
		spi-max-frequency = <40000000>;
		m25p,chunked-io = <31>;

		partition@0 {
			label = "u-boot";
			reg = <0x0 0x30000>;
			read-only;
		};

		partition@30000 {
			label = "u-boot-env";
			reg = <0x30000 0x10000>;
			read-only;
		};

		factory: partition@40000 {
			label = "factory";
			reg = <0x40000 0x10000>;
		};

		firmware: partition@50000 {
			label = "firmware";
		};
	};

	spidev@1 {
		#address-cells = <1>;
		#size-cells = <1>;
		compatible = "rohm,dh2228fv";
		reg = <1>;
		spi-max-frequency = <40000000>;
	};
};

&i2c {
	status = "okay";
};

&uart1 {
	status = "okay";
};

&uart2 {
	status = "okay";
};

&ethernet {
	mtd-mac-address = <&factory 0x28>;
};

&sdhci {
	status = "okay";
	mediatek,cd-low;
};

&wmac {
	status = "okay";
};

&pwm {
	status = "okay";
};

I copied these 2 files from Openwrt SDK 18 from onion git repo (source): https://github.com/OnionIoT/source.git

I put these 2 files (OMEGA2.dst and OMEGA2.dtsi) under the directory "target/linux/ramips/dts/" in the new openwrt SDK 22.03 and then I build the openwrt and then upload the image to my board but the new Device Tree is not taken account.

What I am missing?

[Lazar Demin]

@mohamedkallel To confirm, when you say SDK, do you mean the build system? Meaning https://github.com/OnionIoT/source and/or https://github.com/openwrt/openwrt?

This is an important distinction because there is an OpenWRT SDK that's used for just building packages.

If you do mean build system, I believe you have to rebuild the kernel for the DTS changes to take effect. I can't 100% recall but I believe there's a tmp directory that needs to be deleted before recompiling.

---

EDIT: just saw this in your post:

@mohamedkallel said in Change the Device Tree Source in OpenWRT 22.03 for Omega2:

copied these 2 files from Openwrt SDK 18 from onion git repo (source): https://github.com/OnionIoT/source.git
I put these 2 files (OMEGA2.dst and OMEGA2.dtsi) under the directory "target/linux/ramips/dts/" in the new openwrt SDK 22.03

The DTS files have changed quite a bit from OpenWRT 18.06 to OpenWRT 22.03 - so they can't just be copied over from 18 to 22.
You will need to modify the existing DTS files in OpenWRT 22.03 by hand.