TPS23881_REG_DISC_EN
ret = i2c_smbus_read_word_data(client, TPS23881_REG_DISC_EN);
ret = i2c_smbus_write_word_data(client, TPS23881_REG_DISC_EN, val);
ret = i2c_smbus_read_word_data(client, TPS23881_REG_DISC_EN);
ret = i2c_smbus_write_word_data(client, TPS23881_REG_DISC_EN, val);