#ifndef _TW2835_H_#define _TW2835_H_#include <linux/ioctl.h>typedef struct {	int 		num;	unsigned char 	*buf;		unsigned char	reg;	unsigned char 	bank;		int 		chip;} tw2835_params;/* Use 'h' as magic number */#define IOC_MAGIC  'h'#define tw2835_ioctl_write 	_IOWR(IOC_MAGIC, 8, tw2835_params)#define tw2835_ioctl_read 	_IOWR(IOC_MAGIC, 9, tw2835_params)#endif //_TW2835_H_