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873天前#include <linux/init.h> |
#include <linux/module.h> |
#include <linux/types.h> |
#include <linux/fs.h> |
#include <linux/proc_fs.h> |
#include <linux/device.h> |
#include <asm/uaccess.h> |
|
#include "hello.h" |
|
/*主设备和从设备号变量*/ |
static int hello_major = 0; |
static int hello_minor = 0; |
|
/*设备类别和设备变量*/ |
static struct class* hello_class = NULL; |
static struct hello_android_dev* hello_dev = NULL; |
|
/*传统的设备文件操作方法*/ |
static int hello_open(struct inode* inode, struct file* filp); |
static int hello_release(struct inode* inode, struct file* filp); |
static ssize_t hello_read(struct file* filp, char __user *buf, size_t count, loff_t* f_pos); |
static ssize_t hello_write(struct file* filp, const char __user *buf, size_t count, loff_t* f_pos); |
|
/*设备文件操作方法表*/ |
static struct file_operations hello_fops = { |
.owner = THIS_MODULE, |
.open = hello_open, |
.release = hello_release, |
.read = hello_read, |
.write = hello_write, |
}; |
|
/*访问设置属性方法*/ |
static ssize_t hello_val_show(struct device* dev, struct device_attribute* attr, char* buf); |
static ssize_t hello_val_store(struct device* dev, struct device_attribute* attr, const char* buf, size_t count); |
|
/*定义设备属性*/ |
static DEVICE_ATTR(val, S_IRUGO | S_IWUSR, hello_val_show, hello_val_store); |
