LOONGSON2_I2C_CR2_ITBUFEN
LOONGSON2_I2C_CR2_ITBUFEN, 0);
regmap_update_bits(priv->regmap, LOONGSON2_I2C_CR2, LOONGSON2_I2C_CR2_ITBUFEN, 0);
if (ien & LOONGSON2_I2C_CR2_ITBUFEN)
regmap_update_bits(priv->regmap, LOONGSON2_I2C_CR2, LOONGSON2_I2C_CR2_ITBUFEN,
LOONGSON2_I2C_CR2_ITBUFEN);
(LOONGSON2_I2C_CR2_ITBUFEN | LOONGSON2_I2C_CR2_ITEVTEN | LOONGSON2_I2C_CR2_ITERREN)