How to create a devicetree alias that references to a few nodes in Zephyr RTOS?

Question

I am developnig an application under Zephyr RTOS, that has a few simmilar illuminance sensors. I have added few child nodes to the I2C node like this:

&i2c21 {
    status = "okay";
    pinctrl-names = "default", "sleep";

    opt3001_0: opt3001_0@46 {
        compatible = "ti,opt3001";
        reg = <0x46>;
        status = "okay";
    };
    opt3001_1: opt3001_1@47 {
        compatible = "ti,opt3001";
        reg = <0x47>;
        status = "okay";
    };
};

I can access the sensors in my code using the DEVICE_DT_GET() and DT_NODELABEL() macros. But now I want to do it in a more "high level" way, using aliases. So my code will use illuminance-sensor alias instead of opt3001_0 and opt3001_1 node labels. So in future I would be able to change the senor (or a number of sensors) without changing the code. I want the alias to do something like this:

/ {
    aliases {
        illuminance-sensor = &opt3001_0, &opt3001_1;
    };
};

But the problem is that devicetree compiler throws the error: "All properties in aliases must be singluar". What is the best way to reference a few nodes through a single alias?

I am expecting to use a single alias to use one or multiple sensors in code without using node lables.

Answer 1

You can do this with the zephyr,user devicetree node : https://docs.zephyrproject.org/latest/build/dts/zephyr-user-node.html#devices