linux driver英文

#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/fs.h>

#define DEVICE_NAME "my_device"
#define CLASS_NAME "my_class"

static int major_number;
static struct class* my_class;
static struct device* my_device;

static int device_open(struct inode*, struct file*);
static int device_release(struct inode*, struct file*);
static ssize_t device_read(struct file*, char*, size_t, loff_t*);
static ssize_t device_write(struct file*, const char*, size_t, loff_t*);

static struct file_operations fops = {
   .open = device_open,
   .release = device_release,
   .read = device_read,
   .write = device_write,
};

static int __init my_driver_init(void) {
   major_number = register_chrdev(0, DEVICE_NAME, &fops);
   if (major_number < 0) {
      printk(KERN_ALERT "Failed to register device\n");
      return major_number;
   }
   my_class = class_create(THIS_MODULE, CLASS_NAME);
   my_device = device_create(my_class, NULL, MKDEV(major_number, 0), NULL, DEVICE_NAME);
   printk(KERN_INFO "Driver loaded successfully\n");
   return 0;
}

static void __exit my_driver_exit(void) {
   device_destroy(my_class, MKDEV(major_number, 0));
   class_unregister(my_class);
   class_destroy(my_class);
   unregister_chrdev(major_number, DEVICE_NAME);
   printk(KERN_INFO "Driver unloaded successfully\n");
}

module_init(my_driver_init);
module_exit(my_driver_exit);

MODULE_LICENSE("GPL");
MODULE_AUTHOR("Your Name");
MODULE_DESCRIPTION("A simple Linux device driver");