static int platform_led_probe(struct platform_device *pdev)
{
	int result;
	dev_t devno;
	
	devno = MKDEV(major,minor);
	if(major)
		result = register_chrdev_region(devno,1,"led-dyf");
	else{
		result = alloc_chrdev_region(&devno,0,1,"led-dyf");
		major = MAJOR(devno);
	}
	
	if(result < 0){
		printk("driver init unsuccess!\n");
		return result;
	}
	
	gpbcon = (volatile unsigned long *)ioremap(0x56000010,16);
	gpbdat = gpbcon + 1;
	
	cdev_setup();
	dyf_led_init();
	led_all_off();
	
	printk("platform_led_driver is init successfull!\n");
	
	return 0;
}
static int __init cdev_vir_init(void)
{
	int ret=0;
	dev_t dev;
	int i;
	char node_name[NAME_LEN];
	printk(KERN_ERR "cdev ringbuffer world!\n");
	ret = alloc_chrdev_region(&dev, 0, DEV_NUM, device_name);
	if (ret)
	{
		CL_ERR("cdev: alloc_chardev_region failed!\n");
		ret = -1;
		return ret;
	}

	vir_cdev_class = class_create(THIS_MODULE,device_name);
	if(IS_ERR(vir_cdev_class)) {
		CL_ERR(" failed in creating class.\n");
		ret = -1;
		goto err_class_create;
	}
	CL_PRINT("class_create\n");
	
	vir_devices = kzalloc(sizeof(struct vir_device)*DEV_NUM,GFP_KERNEL);	
	if(vir_devices == NULL)
	{
		CL_ERR("kmalloc vir_device \n");
		ret = -1;
		goto err_kzalloc_err;
	}
	for(i=0;i<DEV_NUM;i++)
	{
		sprintf(node_name,"%s%d",device_name,i);		
		cdev_setup(&vir_devices[i],dev+i,node_name);		
	}
	goto err_chrdev_region;
	
err_kzalloc_err:
	class_destroy(vir_cdev_class);
err_class_create:
	unregister_chrdev_region(dev, DEV_NUM);
err_chrdev_region:	

	return ret;
}