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From: Peng Fan <peng.fan@oss.nxp.com>
To: "Gregory B." <gregory.b.dev@gmail.com>
Cc: u-boot@lists.denx.de, peng.fan@nxp.com, jh80.chung@samsung.com
Subject: Re: eMMC standard update JESD84-B51B
Date: Fri, 30 Jan 2026 11:50:25 +0800	[thread overview]
Message-ID: <aXwqgfEdeGuu4KUl@shlinux89> (raw)
In-Reply-To: <CA+ZXaAbay3Se5+ZorL6HRHzp-vYXD4Hk_n_NqHZNOMhk-o8M8A@mail.gmail.com>

Hi Gregory,

On Wed, Jan 28, 2026 at 09:42:35AM +0100, Gregory B. wrote:
> Hi,
>
>There was a recent change of the eMMC standard at JEDEC. The latest version
>is now JESD84-B51B.
>The CSD_REV has moved to value 9.
>The update of the standard is essentially to redefined the manufacturing
>date field in order to be able to encode year 2026 up to 2038.
>More information can be found in the commits of Linux Kernel and mmc-utils
>reference below.
>
>A couple of patches are now being released in Kernel:
>
>   -
>   https://git.kernel.org/pub/scm/linux/kernel/git/ulfh/mmc.git/commit/?h=next&id=bf60037e32e963f8053c3372c438ba272b7c30c0
>   -
>   https://git.kernel.org/pub/scm/linux/kernel/git/ulfh/mmc.git/commit/?h=next&id=b40ebb75b7461c69ee4da1e49cc2fed309a96349
>
>
>mmc-utils is also being updated:
>https://git.kernel.org/pub/scm/utils/mmc/mmc-utils.git
>
>I was wondering whether a similar update on the uboot code might be needed,
>and I haven't seen any patch or ongoing discussion on the uboot side.

Thanks for the heads up, I will give a look. If you already started to
work on this, patches are welcomed.

Thanks
Peng

>
>Best regards,
>Gregory Baudet

      reply	other threads:[~2026-01-30  3:50 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-01-28  8:42 eMMC standard update JESD84-B51B Gregory B.
2026-01-30  3:50 ` Peng Fan [this message]

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