01_basicLinux内核模块-CSDN博客文章浏览阅读45次。环境ID=ubuntuMakefilemodules:clean:basic.creturn 0;运行效果。https://blog.csdn.net/m0_37132481/article/details/136157384?csdn_share_tail=%7B%22type%22%3A%22blog%22%2C%22rType%22%3A%22article%22%2C%22rId%22%3A%22136157384%22%2C%22source%22%3A%22m0_37132481%22%7D

device_bus_driver.c

root@T:/media/sf_D_DRIVE/kmodule/04_device_bus_driver# cat device_bus_driver.c
#include <linux/module.h>
#include <linux/device.h>
#include <linux/slab.h>#define TAG "HELLO# "struct device *dev = NULL;
struct device_driver *drv = NULL;static int my_bus_match(struct device *_dev, struct device_driver *_drv)
{printk(TAG "%s called\n", __func__);return !strcmp(dev_name(dev), drv->name);
}static int my_bus_probe(struct device *dev)
{printk(TAG "%s called\n", __func__);printk(TAG "hello drv_%s, dev_%s, Happy Marriage!\n", dev->driver->name, dev_name(dev));return 0;
}static void my_bus_remove(struct device *dev)
{printk(TAG "%s called\n", __func__);
}struct bus_type my_bus_type = {.name           = "my-bus",.match          = my_bus_match,.probe          = my_bus_probe,.remove         = my_bus_remove,
};static int device_bus_driver_init(void)
{printk(TAG "%s called\n", __func__);/* register bus */bus_register(&my_bus_type);/* register device */dev = kzalloc(sizeof(*dev), GFP_KERNEL);dev->init_name = "hello";dev->bus = &my_bus_type;device_register(dev);dev = get_device(dev);/* register driver */drv = kzalloc(sizeof(*drv), GFP_KERNEL);drv->name = "hello";drv->bus = &my_bus_type;driver_register(drv);return 0;
}
static void device_bus_driver_exit(void)
{printk(TAG "%s called\n", __func__);/* unregister driver */driver_unregister(drv);/* unregister device */device_unregister(dev);/* unregister bus */bus_unregister(&my_bus_type);/* free resource */kfree(dev);kfree(drv);
}module_init(device_bus_driver_init);
module_exit(device_bus_driver_exit);
MODULE_LICENSE("GPL");

效果