diff options
| author | Avri Altman <avri.altman@sandisk.com> | 2025-11-28 08:20:10 +0300 |
|---|---|---|
| committer | Ulf Hansson <ulf.hansson@linaro.org> | 2026-02-23 14:06:52 +0300 |
| commit | 3e487a634bc019166e452ea276f7522710eda9f4 (patch) | |
| tree | 883b33c8905124a2454485b27fed4c935ed1e61b | |
| parent | 3d9ce86b52b7b328f5662436904789942a5eca1f (diff) | |
| download | linux-3e487a634bc019166e452ea276f7522710eda9f4.tar.xz | |
mmc: core: Adjust MDT beyond 2025
JEDEC JESD84-B51B which was released in September 2025, increases the
manufacturing year limit for eMMC devices. The eMMC manufacturing year
is stored in a 4-bit field in the CID register. Originally, it covered
1997–2012. Later, with EXT_CSD_REV=8, it was extended up to 2025. Now,
with EXT_CSD_REV=9, the range is rolled over by another 16 years, up to
2038.
The mapping is as follows:
cid[8..11] | rev ≤ 4 | 8 ≥ rev > 4 | rev > 8
---------------------------------------------
0 | 1997 | 2013 | 2029
1 | 1998 | 2014 | 2030
2 | 1999 | 2015 | 2031
3 | 2000 | 2016 | 2032
4 | 2001 | 2017 | 2033
5 | 2002 | 2018 | 2034
6 | 2003 | 2019 | 2035
7 | 2004 | 2020 | 2036
8 | 2005 | 2021 | 2037
9 | 2006 | 2022 | 2038
10 | 2007 | 2023 |
11 | 2008 | 2024 |
12 | 2009 | 2025 |
13 | 2010 | | 2026
14 | 2011 | | 2027
15 | 2012 | | 2028
Signed-off-by: Avri Altman <avri.altman@sandisk.com>
Reviewed-by: Shawn Lin <shawn.lin@rock-chips.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
| -rw-r--r-- | drivers/mmc/core/mmc.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/mmc/core/mmc.c b/drivers/mmc/core/mmc.c index 7c86efb1044a..f744dd501842 100644 --- a/drivers/mmc/core/mmc.c +++ b/drivers/mmc/core/mmc.c @@ -671,7 +671,14 @@ static int mmc_decode_ext_csd(struct mmc_card *card, u8 *ext_csd) card->ext_csd.enhanced_rpmb_supported = (card->ext_csd.rel_param & EXT_CSD_WR_REL_PARAM_EN_RPMB_REL_WR); + + if (card->ext_csd.rev >= 9) { + /* Adjust production date as per JEDEC JESD84-B51B September 2025 */ + if (card->cid.year < 2023) + card->cid.year += 16; + } } + out: return err; } |