MLXBF_I2C_CAUSE_OR_CLEAR
writel(~0, priv->slv_cause->io + MLXBF_I2C_CAUSE_OR_CLEAR);
writel(~0x0, priv->slv_cause->io + MLXBF_I2C_CAUSE_OR_CLEAR);
writel(~0x0, priv->mst_cause->io + MLXBF_I2C_CAUSE_OR_CLEAR);