[U-Boot] [PATCH] MTD: mxs_nand: Fix BCH read timeout error on boards requiring ECC

[Tim Harvey]

On Wed, Jan 2, 2019 at 6:37 PM Adam Ford <aford173 at gmail.com> wrote:
>
> The LogicPD board uses a Micron Flash with ECC.  To boot this from
> SPL, the ECC needs to be correctly configured or the BCH engine
> times out.
>
> Signed-off-by: Adam Ford <aford173 at gmail.com>
>
> diff --git a/drivers/mtd/nand/raw/mxs_nand.c b/drivers/mtd/nand/raw/mxs_nand.c
> index e3341812a2..2d84bfffe2 100644
> --- a/drivers/mtd/nand/raw/mxs_nand.c
> +++ b/drivers/mtd/nand/raw/mxs_nand.c
> @@ -1163,6 +1163,12 @@ int mxs_nand_init_spl(struct nand_chip *nand)
>
>         nand_info->gpmi_regs = (struct mxs_gpmi_regs *)MXS_GPMI_BASE;
>         nand_info->bch_regs = (struct mxs_bch_regs *)MXS_BCH_BASE;
> +
> +       if (is_mx6sx() || is_mx7())
> +               nand_info->max_ecc_strength_supported = 62;
> +       else
> +               nand_info->max_ecc_strength_supported = 40;
> +
>         err = mxs_nand_alloc_buffers(nand_info);
>         if (err)
>                 return err;
> diff --git a/drivers/mtd/nand/raw/mxs_nand_spl.c b/drivers/mtd/nand/raw/mxs_nand_spl.c
> index c628f3adec..ba85baac60 100644
> --- a/drivers/mtd/nand/raw/mxs_nand_spl.c
> +++ b/drivers/mtd/nand/raw/mxs_nand_spl.c
> @@ -201,6 +201,7 @@ static int mxs_nand_init(void)
>         /* setup flash layout (does not scan as we override that) */
>         mtd->size = nand_chip.chipsize;
>         nand_chip.scan_bbt(mtd);
> +       mxs_nand_setup_ecc(mtd);
>
>         return 0;
>  }
> --
> 2.17.1
>

Thanks Adam,

This resolves failed booting on Gateworks Ventana IMX6 with NAND SPL
for MT29F2G08AB 2Gbit (oob=64)

Acked-by: Tim Harvey <tharvey at gateworks.com>

Tested-by: Tim Harvey <tharvey at gateworks.com>
for GW5100 with MT29F2G08AB 2Gbit (oob=64)