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| author | Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com> | 2020-07-07 14:58:42 +0300 |
|---|---|---|
| committer | Ulf Hansson <ulf.hansson@linaro.org> | 2020-07-13 13:18:26 +0300 |
| commit | ec02760b63c21c439d44956e9c66d0af24011f03 (patch) | |
| tree | 07f94b45c0c5ec2dc09dd60e454f81a80e384cff /include/linux/mmc | |
| parent | ba26e91d9f8ee94b49dc24f440d4c5efd403456b (diff) | |
| download | linux-ec02760b63c21c439d44956e9c66d0af24011f03.tar.xz | |
mmc: core: Add MMC_CAP2_FULL_PWR_CYCLE_IN_SUSPEND
The commit 5a36d6bcdf23 ("mmc: core: Add DT-bindings for
MMC_CAP2_FULL_PWR_CYCLE") added the "full-pwr-cycle" property which
is possible to perform a full power cycle of the card at any time.
However, some environment (like r8a77951-salvator-xs) is possible
to perform a full power cycle of the card in suspend via firmware
(PSCI on arm-trusted-firmware). So, in worst case, since we are
not doing a graceful shutdown of the eMMC device (just cut VCCQ
while the eMMC is "sleeping") in suspend, it could lead to internal
data corruptions. So, add MMC_CAP2_FULL_PWR_CYCLE_IN_SUSPEND
to do a graceful shutdown which issues Power Off notification
before entering system suspend.
Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Link: https://lore.kernel.org/r/1594123122-13156-3-git-send-email-yoshihiro.shimoda.uh@renesas.com
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Diffstat (limited to 'include/linux/mmc')
| -rw-r--r-- | include/linux/mmc/host.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/mmc/host.h b/include/linux/mmc/host.h index 1fa4fa1caef5..c5b6e97cb21a 100644 --- a/include/linux/mmc/host.h +++ b/include/linux/mmc/host.h @@ -352,6 +352,7 @@ struct mmc_host { #define MMC_CAP2_BOOTPART_NOACC (1 << 0) /* Boot partition no access */ #define MMC_CAP2_FULL_PWR_CYCLE (1 << 2) /* Can do full power cycle */ +#define MMC_CAP2_FULL_PWR_CYCLE_IN_SUSPEND (1 << 3) /* Can do full power cycle in suspend */ #define MMC_CAP2_HS200_1_8V_SDR (1 << 5) /* can support */ #define MMC_CAP2_HS200_1_2V_SDR (1 << 6) /* can support */ #define MMC_CAP2_HS200 (MMC_CAP2_HS200_1_8V_SDR | \ |