REG_CONF1
status = i2c_smbus_read_byte_data(client, REG_CONF1);
dev_dbg(&client->dev, "reg 0x%02x, err %d\n", REG_CONF1,
i2c_smbus_write_byte_data(client, REG_CONF1, status);
i2c_smbus_write_byte_data(client, REG_CONF1, status);