adt7470_write_word_data
err = adt7470_write_word_data(data, ADT7470_REG_ALARM1_MASK, mask);
err = adt7470_write_word_data(data, ADT7470_REG_FAN_MIN(channel), val);
err = adt7470_write_word_data(data, ADT7470_REG_FAN_MAX(channel), val);