Linux Device Drivers Development

OF match style

OF match style is the first matching mechanism performed by the platform core in order to match devices with their drivers. It uses a device tree's compatible property to match the device entry in of_match_table, which is a field of the struct driver substructure. Each device node has a compatible property, which is a string or a list of strings. Any platform driver that declares one of the strings listed in the compatible property will trigger a match and will see its probe function executed.

A DT match entry is described in the kernel as an instance of the struct of_device_id structure, which is defined in linux/mod_devicetable.h and looks as follows:

// we are only interested in the two last elements of the structure struct ...