fts_read_byte
err = fts_read_byte(data->client, FTS_DEVICE_STATUS_REG);
err = fts_read_byte(data->client, FTS_FAN_PRESENT_REG);
err = fts_read_byte(data->client, FTS_FAN_EVENT_REG);
err = fts_read_byte(data->client, FTS_REG_FAN_INPUT(i));
err = fts_read_byte(data->client,
err = fts_read_byte(data->client, FTS_SENSOR_EVENT_REG);
err = fts_read_byte(data->client, FTS_REG_TEMP_INPUT(i));
err = fts_read_byte(data->client, FTS_REG_VOLT(i));
ret = fts_read_byte(data->client, FTS_WATCHDOG_CONTROL);
timeout = fts_read_byte(data->client, FTS_WATCHDOG_TIME_PRESET);
ret = fts_read_byte(data->client, FTS_WATCHDOG_CONTROL);
ret = fts_read_byte(data->client, FTS_REG_TEMP_CONTROL(channel));
ret = fts_read_byte(data->client, FTS_REG_FAN_CONTROL(channel));