12.2.6 触摸屏设备驱动的打开、释放函数

1  static int s3c2410_ts_open(struct inode *inode, struct file *filp)
2  {
3  tsdev.head = tsdev.tail = 0;
4  tsdev.penStatus = PEN_UP;//初始化触摸屏状态为PEN_UP
5  #ifdef HOOK_FOR_DRAG //如果定义了拖动钩子函数
6  init_timer(&ts_timer);//初始化定时器
7  ts_timer.function = ts_timer_handler;
8  #endif
9  tsEvent = tsEvent_raw;
10 init_waitqueue_head(&(tsdev.wq));//初始化等待队列
11 
12 return 0;
13 }

1 static int s3c2410_ts_release(struct inode *inode, struct file *filp)
2 {
3   #ifdef HOOK_FOR_DRAG
4     del_timer(&ts_timer);//删除定时器
5   #endif
6   return 0;
7 }