I2C_INT_MASK
i2c_readl(i2c_dev, I2C_INT_MASK));
int_mask = i2c_readl(i2c_dev, I2C_INT_MASK) & ~mask;
i2c_writel(i2c_dev, int_mask, I2C_INT_MASK);
int_mask = i2c_readl(i2c_dev, I2C_INT_MASK) | mask;
i2c_writel(i2c_dev, int_mask, I2C_INT_MASK);
i2c_writel(i2c_dev, 0, I2C_INT_MASK);