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| author | Stanley Chu <stanley.chu@mediatek.com> | 2020-07-29 07:18:39 +0200 |
|---|---|---|
| committer | Martin K. Petersen <martin.petersen@oracle.com> | 2020-07-31 03:10:29 +0200 |
| commit | c4df6eed972e001a206a173738bec8c5f903257a (patch) | |
| tree | d28d8dff97185a5c892230524154769322d622ca /drivers/scsi/ufs/ufs_quirks.h | |
| parent | scsi: virtio-scsi: Correctly handle the case where all LUNs are unplugged (diff) | |
| download | linux-c4df6eed972e001a206a173738bec8c5f903257a.tar.xz linux-c4df6eed972e001a206a173738bec8c5f903257a.zip | |
scsi: ufs: Introduce device quirk "DELAY_AFTER_LPM"
Some UFS devices require delay after VCC power rail is turned off.
Introduce a device quirk "DELAY_AFTER_LPM" to add 5ms delay after VCC
power-off during suspend flow.
Link: https://lore.kernel.org/r/20200729051840.31318-2-stanley.chu@mediatek.com
Reviewed-by: Andy Teng <andy.teng@mediatek.com>
Reviewed-by: Peter Wang <peter.wang@mediatek.com>
Reviewed-by: Can Guo <cang@codeaurora.org>
Acked-by: Avri Altman <Avri.Altman@wdc.com>
Signed-off-by: Stanley Chu <stanley.chu@mediatek.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'drivers/scsi/ufs/ufs_quirks.h')
| -rw-r--r-- | drivers/scsi/ufs/ufs_quirks.h | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/scsi/ufs/ufs_quirks.h b/drivers/scsi/ufs/ufs_quirks.h index 2a0041493e30..07f559ac5883 100644 --- a/drivers/scsi/ufs/ufs_quirks.h +++ b/drivers/scsi/ufs/ufs_quirks.h @@ -109,4 +109,11 @@ struct ufs_dev_fix { */ #define UFS_DEVICE_QUIRK_SUPPORT_EXTENDED_FEATURES (1 << 10) +/* + * Some UFS devices require delay after VCC power rail is turned-off. + * Enable this quirk to introduce 5ms delays after VCC power-off during + * suspend flow. + */ +#define UFS_DEVICE_QUIRK_DELAY_AFTER_LPM (1 << 11) + #endif /* UFS_QUIRKS_H_ */ |