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mmc: core: production year for eMMC 4.41 and later
The field containing the production date in the CID register only uses 4 bits to encode the year, starting from 1997 in the original standard. In 2013, the production year field contains 0, and the kernel reports a 1997 production date. The eMMC 4.51 specification adds a new interpretation rule. For all devices implementing the 4.41 specification or later, the production year field will be interpreted as a value between 2010 and 2025, with 0 corresponding to 2013. Signed-off-by: Romain Izard <romain.izard.pro@gmail.com> Signed-off-by: Chris Ball <cjb@laptop.org>
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@ -482,6 +482,10 @@ static int mmc_read_ext_csd(struct mmc_card *card, u8 *ext_csd)
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}
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if (card->ext_csd.rev >= 5) {
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/* Adjust production date as per JEDEC JESD84-B451 */
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if (card->cid.year < 2010)
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card->cid.year += 16;
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/* check whether the eMMC card supports BKOPS */
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if (ext_csd[EXT_CSD_BKOPS_SUPPORT] & 0x1) {
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card->ext_csd.bkops = 1;
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