* [PATCH AUTOSEL 4.19 01/18] scsi: ufs: Add DELAY_BEFORE_LPM quirk for Micron devices
@ 2020-08-20 0:02 Sasha Levin
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From: Sasha Levin @ 2020-08-20 0:02 UTC (permalink / raw)
To: linux-kernel, stable
Cc: Sasha Levin, Martin K . Petersen, linux-scsi, linux-mediatek,
Alim Akhtar, Stanley Chu, linux-arm-kernel, Bean Huo
From: Stanley Chu <stanley.chu@mediatek.com>
[ Upstream commit c0a18ee0ce78d7957ec1a53be35b1b3beba80668 ]
It is confirmed that Micron device needs DELAY_BEFORE_LPM quirk to have a
delay before VCC is powered off. Sdd Micron vendor ID and this quirk for
Micron devices.
Link: https://lore.kernel.org/r/20200612012625.6615-2-stanley.chu@mediatek.com
Reviewed-by: Bean Huo <beanhuo@micron.com>
Reviewed-by: Alim Akhtar <alim.akhtar@samsung.com>
Signed-off-by: Stanley Chu <stanley.chu@mediatek.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/scsi/ufs/ufs_quirks.h | 1 +
drivers/scsi/ufs/ufshcd.c | 2 ++
2 files changed, 3 insertions(+)
diff --git a/drivers/scsi/ufs/ufs_quirks.h b/drivers/scsi/ufs/ufs_quirks.h
index 5d2dfdb41a6ff..758d3a67047df 100644
--- a/drivers/scsi/ufs/ufs_quirks.h
+++ b/drivers/scsi/ufs/ufs_quirks.h
@@ -21,6 +21,7 @@
#define UFS_ANY_VENDOR 0xFFFF
#define UFS_ANY_MODEL "ANY_MODEL"
+#define UFS_VENDOR_MICRON 0x12C
#define UFS_VENDOR_TOSHIBA 0x198
#define UFS_VENDOR_SAMSUNG 0x1CE
#define UFS_VENDOR_SKHYNIX 0x1AD
diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c
index bd21c9cdf8183..ab628fd37e026 100644
--- a/drivers/scsi/ufs/ufshcd.c
+++ b/drivers/scsi/ufs/ufshcd.c
@@ -218,6 +218,8 @@ ufs_get_desired_pm_lvl_for_dev_link_state(enum ufs_dev_pwr_mode dev_state,
static struct ufs_dev_fix ufs_fixups[] = {
/* UFS cards deviations table */
+ UFS_FIX(UFS_VENDOR_MICRON, UFS_ANY_MODEL,
+ UFS_DEVICE_QUIRK_DELAY_BEFORE_LPM),
UFS_FIX(UFS_VENDOR_SAMSUNG, UFS_ANY_MODEL,
UFS_DEVICE_QUIRK_DELAY_BEFORE_LPM),
UFS_FIX(UFS_VENDOR_SAMSUNG, UFS_ANY_MODEL, UFS_DEVICE_NO_VCCQ),
--
2.25.1
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