Adding Version Information to Linux Drivers

During the development of Linux drivers, it is sometimes necessary to print some driver version information, which facilitates iteration and maintenance.

The following describes the implementation approach:

First, include the header file information

#include <linux/version.h>
#define DRIVER_VERSION KERNEL_VERSION(0, 0x01, 0x4)

Then, in the driver’s probe function or entry function

static int imx415_probe(struct i2c_client *client, const struct i2c_device_id *id) {
    struct device *dev = &client->dev;
    dev_info(dev, "driver version: %02x.%02x.%02x", 
        DRIVER_VERSION >> 16, 
        (DRIVER_VERSION & 0xff00) >> 8, 
        DRIVER_VERSION & 0x00ff);
}