cdev
kernel function: the difference beween cdev_add and device_create
To use a character driver, first you should register it with the system. Then you should expose it to the user space. 1. cdev_init and cdev_add functi ......
cdev设备 字符设备驱动例子
#include <linux/init.h> #include <linux/module.h> #include <linux/cdev.h> #include <linux/fs.h> #include <linux/device.h> #include <linux/uaccess.h> # ......
使用alloc_chrdev_region/register_chrdev_region/cdev注册字符设备和使用class在驱动加载时自动创建设备节点
使用新版本字符设备驱动函数（register_chrdev_region）编写字符驱动和在驱动模块加载的同时创建设备节点；结合了IMX6ULL阿尔法开发板，编写了LED驱动模块。 ......