LM75_IOCTL
#define LM75_GET_HYST (LM75_IOCTL | 0) /* (int16_t *) */
#define LM75_SET_HYST (LM75_IOCTL | 1) /* (int16_t *) */
#define LM75_GET_OVERTEMP_SHUTDOWN (LM75_IOCTL | 2) /* (int16_t *) */
#define LM75_SET_OVERTEMP_SHUTDOWN (LM75_IOCTL | 3) /* (int16_t *) */
#define LM75_GET_CONFIG (LM75_IOCTL | 4) /* (uint8_t *) */
#define LM75_SET_CONFIG (LM75_IOCTL | 5) /* (uint8_t *) */