#include <linux/init.h>
  
  /* High level I2C actions */

  int i2c_write(unsigned char theSlave, void *data, size_t nbytes);
  int i2c_read(unsigned char theSlave, void *data, size_t nbytes);

  int i2c_writereg(unsigned char theSlave, unsigned char theReg, unsigned char theValue);
  unsigned char i2c_readreg(unsigned char theSlave, unsigned char theReg);
  
  /* Low level I2C */
  void i2c_start(void);
  void i2c_stop(void);
  void i2c_outbyte(unsigned char x);
  unsigned char i2c_inbyte(void);
  int i2c_getack(void);
  void i2c_sendack(void);