Using a device tree to describe a character driver

At this point, we have all the information needed to define a new character device by using a device tree. In particular, this time, to register our chrdev device, we can use the new API that we skipped in Chapter 3, Working with Char Drivers.

Getting ready

As stated in the previous paragraph, we can use a device tree node to add a new device to our system. In particular, we can obtain a definition as reported in the following:

chrdev {
    compatible = "ldddc,chrdev";
    #address-cells = <1>;
    #size-cells = <0>;

    chrdev@2 {
        label = "cdev-eeprom";
        reg = <2>;
    };

    chrdev@4 {
        label = "cdev-rom";
    ...