Hi Han,
> Subject: [PATCH] mmc: Add support for eMMC 5.1B specification
>
> Add support for eMMC specification version 5.1B by defining
> MMC_VERSION_5_1B and including it in the version array.
>
> eMMC 5.1B (JESD84-B51B) is a minor revision of the 5.1 specification
> that primarily addresses MDT (Manufacturing Date) adjustment for
> dates beyond 2025. This aligns with the Linux kernel commit
> 9996707822f82
> ("mmc: core: Adjust MDT beyond 2025").
>
> Since the manufacturing date field is not currently used in U-Boot, this
> change has no functional impact beyond proper device recognition.
> It allows the driver to correctly identify and initialize eMMC devices
> that report version 5.1B in their Extended CSD register.
>
> Signed-off-by: Han Xu <[email protected]>
> ---
> drivers/mmc/mmc.c | 3 ++-
> include/mmc.h | 1 +
> 2 files changed, 3 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/mmc/mmc.c b/drivers/mmc/mmc.c index
> c5705f4f215..f0e38efb262 100644
> --- a/drivers/mmc/mmc.c
> +++ b/drivers/mmc/mmc.c
> @@ -2343,7 +2343,8 @@ static int mmc_startup_v4(struct mmc
> *mmc)
> MMC_VERSION_4_41,
> MMC_VERSION_4_5,
> MMC_VERSION_5_0,
> - MMC_VERSION_5_1
> + MMC_VERSION_5_1,
> + MMC_VERSION_5_1B
> };
>
> #if CONFIG_IS_ENABLED(MMC_TINY)
> diff --git a/include/mmc.h b/include/mmc.h index
> 51d3f2f8dd5..9509c9e9543 100644
> --- a/include/mmc.h
> +++ b/include/mmc.h
> @@ -54,6 +54,7 @@ struct bd_info;
> #define MMC_VERSION_4_5 MAKE_MMC_VERSION(4, 5,
> 0)
> #define MMC_VERSION_5_0 MAKE_MMC_VERSION(5, 0,
> 0)
> #define MMC_VERSION_5_1 MAKE_MMC_VERSION(5, 1,
> 0)
> +#define MMC_VERSION_5_1B MAKE_MMC_VERSION(5, 1, 0xB)
https://lore.kernel.org/u-boot/[email protected]/
I have same question here.
Thanks,
Peng
>
> #define MMC_CAP(mode) (1 << mode)
> #define MMC_MODE_HS (MMC_CAP(MMC_HS) |
> MMC_CAP(SD_HS))
> --
> 2.34.1
