I2C_ICR
writel(I2C_CLEAR_ALL_INTS, priv->virtbase + I2C_ICR);
i2c_set_bit(priv->virtbase + I2C_ICR, I2C_IT_MAL);
i2c_set_bit(priv->virtbase + I2C_ICR, I2C_IT_BERR);