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s3c2440»ùÓÚlinuxµÄgpio led×Ö·ûÉ豸Çý¶¯Êµ¼ù

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#include <linux/config.h>//ÅäÖÃÍ·Îļþ
#include <linux/kernel.h>//ÄÚºËÍ·Îļþ
#include <linux/sched.h>
#include <linux/timer.h>//ʱÖÓÍ·Îļþ
#include <linux/init.h>//Óû§¶¨ÒåÄ£¿é³õʼº¯ÊýÃûÐèÒýÓõÄÍ·Îļþ
#include <linux/module.h>//Ä£¿é¼ÓÔصÄÍ·Îļþ
#include <asm/hardware.h>
#include <asm/arch/S3C2440.h> //Õâ¸öÊÇ2440µÄ¼Ä´æÆ÷Í·Îļþ£¬asm/srchÖ»ÊǸöÁ´½Ó
//ʵ¼Ê¸ù¾Ý×Ô¼ºµÄÇé¿ö²éÕÒ,Ò»°ãÊÇ../../linux2.*.*/include/asm/arch-s3c2440Àï ±àÒëÆ÷
//×Ô¼º»á²éѯÁ´½Ó,ÒÔÇ°²»ÖªµÀ£¬ÕÒÁË°ëÌì
// GPIO_LED DEVICE MAJOR
#define GPIO_LED_MAJOR 97    //¶¨ÒåÖ÷É豸ºÅ
//define LED STATUS  Îҵİå×Ó LEDÔÚGPB0 ÓëGPB1 ´¦ ´ó¼Ò¸ù¾Ý×Ô¼ºÇé¿ö¸Ä 
#define LED_ON  0 //¶¨ÒåLEDµÆµÄ״̬ ¿ª
#define LED_OFF 1 //
// ------------------- READ ------------------------  Õâ¸öÇ°ÃæÒª¼Óstatic ·ñÔò¾¯¸æ
static ssize_t GPIO_LED_read (struct file * file ,char * buf, size_t count, loff_t * f_ops)
{
 return count;

// ------------------- WRITE -----------------------
static ssize_t GPIO_LED_write (struct file * file ,const char * buf, size_t count, loff_t * f_ops)
{
 return count;

// ------------------- IOCTL -----------------------
static ssize_t GPIO_LED_ioctl (struct inode * inode ,struct file * file, unsigned int cmd, long data)         //Õâ¸öº¯ÊýʵÏÖÁËledµÆÁÁÃðµÄ½Ó¿Ú
{
 switch (cmd)
        {
  case LED_ON : { GPBDAT =0x01; break;}  //¸ù¾Ý×Ô¼ºÇé¿öÐÞ¸Ä Ò»¸öÁÁ Ò»¸öÃð
  case LED_OFF: { GPBDAT =0x02; break;}  //½»ÌæÉÁ˸
                default :
      &n


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