mini6410 实现简单按键中断驱动

简单按键中断驱动，在mini6410开发板上运行良好。

仅供技术交流，请勿商用

转载请标明出处：查看源码http://blog.csdn.net/muge0913/article/details/7009685

#include <linux/fs.h>
#include <linux/init.h>
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/irq.h>
#include <asm/irq.h>
#include <asm/io.h>
#include <linux/interrupt.h>
#include <linux/miscdevice.h>
#include <linux/cdev.h>
#include <asm/uaccess.h>
#include <mach/hardware.h>
#include <linux/platform_device.h>
#include <mach/regs-gpio.h>
#include <mach/gpio-bank-n.h>
#include <plat/gpio-cfg.h>

#define DEVICE_NAME "button_irq"

static int button_irq_open(struct inode *inode,struct file *filp)
{
	return 0;
}
static int button_irq_release(struct inode *inode,struct file *filp)
{
	return 0;
}
static irqreturn_t  button_irq_inter(int nr,void *devid)
{
	static int count=0;
	count ++;
	printk("%d\n",count);
	return IRQ_RETVAL(IRQ_HANDLED);
}
static int button_irq_init()
{
	unsigned int ret;
	ret = request_irq(IRQ_EINT(0),button_irq_inter,IRQ_TYPE_EDGE_BOTH,"KEY0",NULL);
	return 0;
}
static struct file_operations dev_fops =
{
	.owner = THIS_MODULE,
	.open = button_irq_open,
	.release = button_irq_release,

};
static struct miscdevice misc =
{
	.minor = MISC_DYNAMIC_MINOR,
	.name = DEVICE_NAME,
	.fops = &dev_fops,
};
static int __init dev_init()
{
	int ret;
	ret = misc_register(&misc);
	printk("button_irq errno\n");
	button_irq_init();
	return 0;
}
static void __exit dev_exit()
{
	misc_deregister(&misc);
	free_irq(IRQ_EINT(0),NULL);
}

module_init(dev_init);
module_exit(dev_exit);

MODULE_LICENSE("GPL");
MODULE_AUTHOR("MUGE0913");