MPI_CSCTL_REG
val = bcm_mpi_readl(MPI_CSCTL_REG(cs));
bcm_mpi_writel(val, MPI_CSCTL_REG(cs));
val = bcm_mpi_readl(MPI_CSCTL_REG(cs));
bcm_mpi_writel(val, MPI_CSCTL_REG(cs));
val = bcm_mpi_readl(MPI_CSCTL_REG(cs));
bcm_mpi_writel(val, MPI_CSCTL_REG(cs));