dev_gpio.h.txt

gpio 驱动源码 也许有用！！与大家共享！

//以下是dev_gpio.h 
#include   <linux/fs.h> 
#include   <linux/iobuf.h> 
#include   <linux/major.h> 
#include   <linux/blkdev.h> 
#include   <linux/capability.h> 
#include   <linux/smp_lock.h> 
#include   <asm/uaccess.h> 

#include   <asm/io.h> 
#include   <linux/vmalloc.h> 

#define   dprintk(x...) 
#define   IOPORT_MAJOR   220 

typedef   char   ioport_device_t; 

int   gpio_open(struct   inode   *,   struct   file   *); 
int   gpio_release(struct   inode   *,   struct   file   *); 
int   gpio_ctl_ioctl(struct   inode   *,   struct   file   *,   unsigned   int,   unsigned   long); 
static   struct   file_operations   gpio_fops   = 
{ 
open:   gpio_open, 
release:   gpio_release, 
}; 
static   struct   file_operations   gpio_ctl_fops   = 
{ 
ioctl:   gpio_ctl_ioctl, 
open:   gpio_open, 
release:   gpio_release, 
};