[U-Boot] NAND on mpc8360erdk

[Renaud barbier]

I am in the middle of NAND debugging on a MPC8544 based system.
 
In the following code for the mpc8360erdk, why is there
the instruction "out_8(upm->io_addr, 0x0);" in the for loop.
Is that board specific?

static void upm_setup(struct fsl_upm *upm)
{
    int i;

    /* write upm array */
    out_be32(upm->mxmr, MxMR_OP_WARR);

    for (i = 0; i < 64; i++) {
        out_be32(upm->mdr, upm_array[i]);
        out_8(upm->io_addr, 0x0);
    }

    /* normal operation */
    out_be32(upm->mxmr, MxMR_OP_NORM);
    while (in_be32(upm->mxmr) != MxMR_OP_NORM)
        eieio();
}