NCT3018Y_REG_ST
flags = i2c_smbus_read_byte_data(client, NCT3018Y_REG_ST);
err = i2c_smbus_read_i2c_block_data(client, NCT3018Y_REG_ST, 1, buf);
status = i2c_smbus_read_byte_data(client, NCT3018Y_REG_ST);
err = i2c_smbus_write_byte_data(client, NCT3018Y_REG_ST, flags);
flags = i2c_smbus_read_byte_data(client, NCT3018Y_REG_ST);
err = i2c_smbus_write_byte_data(client, NCT3018Y_REG_ST, flags);