LM90_REG_MAN_ID
LM90_REG_MAN_ID);
if (i2c_smbus_read_byte_data(client, LM90_REG_MAN_ID) != 0x4d)
man_id = i2c_smbus_read_byte_data(client, LM90_REG_MAN_ID);
man_id = i2c_smbus_read_byte_data(client, LM90_REG_MAN_ID);