Drive Learning 5-Generating device nodes (Miscellaneous devices)

Miscellaneous device header files in "Include/linux/miscdevice.h", you need to use two functions and a struct

Miscellaneous device registration functions: int misc_register (struct misdevice *misc);

Miscellaneous device unload function: int mis_deregister (struct misdevice *misc);

 struct   misdevice{ int   minor;  const  char  *name;  const  struct  file_operations *< Span style= "color: #000000;"    >fops;     struct   List_head list;     parent;     this_device;  const  char  *nodename; mode_t mode;}  

Where the file_operations structure is in the header file "Include/linux/fs.h", the members of the file_operations structure belong to the main content of the driver design, and the function and Linux system correspond to the system interface one by one provided by the application.

You need to define these functions yourself (such as OPEN,RELEASE,IOCTL)

Drive Learning 5-Generating device nodes (Miscellaneous devices)