evie/android_kernel_oneplus_msm8998
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mmc: core: set MMC_PM_KEEP_POWER for certain Hynix mmc cards

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Certain Hynix eMMC 5.0 cards might reach a fast EOL if
the card's power is disabled between CMD5 and CMD0
(power off during reset).
This patch sets the MMC_PM_KEEP_POWER flag to indicate
that the card's power should be retained for suspend/resume
sequences.

Change-Id: I4bcc0f4bfd608745626816ca261369b432602c45
Signed-off-by: Dov Levenglick <dovl@codeaurora.org>
This commit is contained in:
Dov Levenglick 2015-07-14 14:10:57 +03:00 • committed by Subhash Jadavani
parent 8ee51daf1c
commit d25b9c4733
2 changed files with 13 additions and 0 deletions
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12
drivers/mmc/core/mmc.c
View file

@ -126,6 +126,12 @@ static void mmc_set_erase_size(struct mmc_card *card)
mmc_init_erase(card);
}
static void add_pm_flag_mmc(struct mmc_card *card, int data)
{
if (mmc_card_mmc(card))
card->host->pm_flags |= data;
}
static const struct mmc_fixup mmc_fixups[] = {
/* avoid HPI for specific cards */
@ -136,6 +142,9 @@ static const struct mmc_fixup mmc_fixups[] = {
MMC_FIXUP("MMC16G", CID_MANFID_KINGSTON, CID_OEMID_ANY,
add_quirk_mmc, MMC_QUIRK_CACHE_DISABLE),
MMC_FIXUP_EXT_CSD_REV(CID_NAME_ANY, CID_MANFID_HYNIX, CID_OEMID_ANY,
add_pm_flag_mmc, MMC_PM_KEEP_POWER, MMC_V5_0),
END_FIXUP
};
@ -382,6 +391,9 @@ static int mmc_decode_ext_csd(struct mmc_card *card, u8 *ext_csd)
*/
card->ext_csd.rev = ext_csd[EXT_CSD_REV];
/* fixup device after ext_csd revision field is updated */
mmc_fixup_device(card, mmc_fixups);
card->ext_csd.raw_sectors[0] = ext_csd[EXT_CSD_SEC_CNT + 0];
card->ext_csd.raw_sectors[1] = ext_csd[EXT_CSD_SEC_CNT + 1];
card->ext_csd.raw_sectors[2] = ext_csd[EXT_CSD_SEC_CNT + 2];

1
include/linux/mmc/card.h
View file

@ -472,6 +472,7 @@ struct mmc_fixup {
#define CID_MANFID_MICRON 0x13
#define CID_MANFID_SAMSUNG 0x15
#define CID_MANFID_KINGSTON 0x70
#define CID_MANFID_HYNIX 0x90
#define CID_MANFID_ANY (-1u)
#define CID_OEMID_ANY ((unsigned short) -1)