SMSC47M192_REG_CONFIG
SMSC47M192_REG_CONFIG);
u8 config = i2c_smbus_read_byte_data(client, SMSC47M192_REG_CONFIG);
i2c_smbus_write_byte_data(client, SMSC47M192_REG_CONFIG,
config = i2c_smbus_read_byte_data(client, SMSC47M192_REG_CONFIG);