MLXBF_I2C_SMBUS_MASTER_GW
readl_poll_timeout_atomic(priv->mst->io + MLXBF_I2C_SMBUS_MASTER_GW,
writel(command, priv->mst->io + MLXBF_I2C_SMBUS_MASTER_GW);
ret = readl_poll_timeout_atomic(priv->mst->io + MLXBF_I2C_SMBUS_MASTER_GW,
writel(0, priv->mst->io + MLXBF_I2C_SMBUS_MASTER_GW);