[Linux drivers] [Linux Driver] device driver Model related (i)--Sample code

Source: Internet
Author: User
Tags sprintf

1, the following is the sample code:

[CPP]View Plaincopy
  1. #include <linux/device.h>
  2. #include <linux/module.h>
  3. #include <linux/kernel.h>
  4. #include <linux/init.h>
  5. #include <linux/string.h>
  6. Module_license ("Dual BSD/GPL");
  7. static char *version = "2.0.1";
  8. static int My_match (struct device *dev, struct device_driver *driver)
  9. {
  10. return!strncmp (Dev->kobj.name, Driver->name, strlen (driver->name));
  11. }
  12. static void my_bus_release (struct device *dev)
  13. {
  14. PRINTK (kern_debug "My bus release\n");
  15. }
  16. struct device My_bus = {
  17. . Kobj.name = "My_bus0",
  18. . Release = My_bus_release
  19. };
  20. struct Bus_type My_bus_type = {
  21. . Name = "My_bus",
  22. . match = My_match,
  23. };
  24. Export_symbol (My_bus);
  25. Export_symbol (My_bus_type);
  26. Static ssize_t show_bus_version (struct bus_type *bus, char *buf)
  27. {
  28. return snprintf (buf, Page_size, "%s\n", Version);
  29. }
  30. Static bus_attr (version, S_irugo, show_bus_version, NULL);
  31. static int __init my_bus_init (void)
  32. {
  33. int ret;
  34. ret = Bus_register (&my_bus_type);
  35. if (ret)
  36. return ret;
  37. if (Bus_create_file (&my_bus_type, &bus_attr_version))
  38. PRINTK (Kern_notice "Fail to create version attribute!\n");
  39. ret = Device_register (&my_bus);
  40. if (ret)
  41. PRINTK (Kern_notice "Fail to register device:my_bus!\n");
  42. return ret;
  43. }
  44. static void My_bus_exit (void)
  45. {
  46. Device_unregister (&my_bus);
  47. Bus_unregister (&my_bus_type);
  48. }
  49. Module_init (My_bus_init);
  50. Module_exit (My_bus_exit);

[CPP]View Plaincopy
  1. #include <linux/device.h>
  2. #include <linux/module.h>
  3. #include <linux/kernel.h>
  4. #include <linux/init.h>
  5. #include <linux/string.h>
  6. Module_license ("Dual BSD/GPL");
  7. extern struct device my_bus;
  8. extern struct Bus_type my_bus_type;
  9. static void my_dev_release (struct device *dev)
  10. {
  11. }
  12. struct device My_dev = {
  13. . Init_name = "My_dev",
  14. . Bus = &my_bus_type,
  15. . Parent = &my_bus,
  16. . Release = My_dev_release,
  17. };
  18. Static ssize_t mydev_show (struct device *dev,struct Device_attribute *attr, char *buf)
  19. {
  20. return sprintf (buf, "%s\n", "This is my device!");
  21. }
  22. Static device_attr (Dev, S_irugo, mydev_show, NULL);
  23. static int __init my_device_init (void)
  24. {
  25. int ret = 0;
  26. ///strncpy (My_dev->kobj.name, "My_dev", strlen (My_dev->name));
  27. Device_register (&my_dev);
  28. Device_create_file (&my_dev, &dev_attr_dev);
  29. return ret;
  30. }
  31. static void My_device_exit (void)
  32. {
  33. Device_unregister (&my_dev);
  34. }
  35. Module_init (My_device_init);
  36. Module_exit (My_device_exit);



[CPP]View Plaincopy
    1. #include <linux/device.h>
    2. #include <linux/module.h>
    3. #include <linux/kernel.h>
    4. #include <linux/init.h>
    5. #include <linux/string.h>
    6. Module_license ("Dual BSD/GPL");
    7. extern struct Bus_type my_bus_type;
    8. static int my_probe (struct device *dev)
    9. {
    10. PRINTK ("Driver found device which my Driver can handle!\n");
    11. return 0;
    12. }
    13. static int my_remove (struct device *dev)
    14. {
    15. PRINTK ("Driver found device unpluged!\n");
    16. return 0;
    17. }
    18. struct Device_driver my_driver = {
    19. . Name = "My_dev",
    20. . Bus = &my_bus_type,
    21. . Probe = My_probe,
    22. . remove = My_remove,
    23. };
    24. Static ssize_t mydriver_show (struct device_driver *driver, char *buf)
    25. {
    26. return sprintf (buf, "%s\n", "This is my driver!");
    27. }
    28. Static driver_attr (DRV, S_irugo, Mydriver_show, NULL);
    29. static int __init my_driver_init (void)
    30. {
    31. int ret = 0;
    32. Driver_register (&my_driver);
    33. Driver_create_file (&my_driver, &driver_attr_drv);
    34. return ret;
    35. }
    36. static void My_driver_exit (void)
    37. {
    38. Driver_unregister (&my_driver);
    39. }
    40. Module_init (My_driver_init);
    41. Module_exit (My_driver_exit);

[Linux drivers] [Linux Driver] device driver Model related (i)--Sample code

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