> Subject: [PATCH] mmc: Avoid HS400 mode when accessing boot partitions
>
> According to JEDEC JESD84-B51.pdf section 6.3.3 Boot operation ,
> HS200 & HS400 mode is not supported during boot operation. The U-Boot
> code currently only applies this restriction to HS200 mode, extend this to
> HS400 mode as well.
>
> Signed-off-by: Marek Vasut <marek.vasut+rene...@gmail.com>
> Cc: Jean-Jacques Hiblot <jjhib...@ti.com>
> Cc: Nobuhiro Iwamatsu <iwama...@nigauri.org>
> Cc: Peng Fan <peng....@nxp.com>
> ---
> drivers/mmc/mmc.c | 4 ++--
> 1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/mmc/mmc.c b/drivers/mmc/mmc.c index
> 456c1b4cc9..71b52c6cf2 100644
> --- a/drivers/mmc/mmc.c
> +++ b/drivers/mmc/mmc.c
> @@ -905,14 +905,14 @@ static int mmc_set_capacity(struct mmc *mmc, int
> part_num)
> return 0;
> }
>
> -#if CONFIG_IS_ENABLED(MMC_HS200_SUPPORT)
> +#if CONFIG_IS_ENABLED(MMC_HS200_SUPPORT) ||
> +CONFIG_IS_ENABLED(MMC_HS400_SUPPORT)
> static int mmc_boot_part_access_chk(struct mmc *mmc, unsigned int
> part_num) {
> int forbidden = 0;
> bool change = false;
>
> if (part_num & PART_ACCESS_MASK)
> - forbidden = MMC_CAP(MMC_HS_200);
> + forbidden = MMC_CAP(MMC_HS_200) | MMC_CAP(MMC_HS_400);
>
> if (MMC_CAP(mmc->selected_mode) & forbidden) {
> pr_debug("selected mode (%s) is forbidden for part %d\n",
Reviewed-by: Peng Fan <peng....@nxp.com>
> --
> 2.20.1
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