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Date:   Fri,  8 Jan 2021 15:28:04 +0800
From:   Ziqi Chen <>
Cc:     Andy Gross <>,
        Bjorn Andersson <>,
        Alim Akhtar <>,
        Avri Altman <>,
        "James E.J. Bottomley" <>, (open list:ARM/QUALCOMM SUPPORT), (open list)
Subject: [PATCH v5 2/2] scsi: ufs-qcom: Fix ufs RST_n specs violation

As per specs, e.g, JESD220E chapter 7.2, while powering
off/on the ufs device, RST_n signal should be between
VSS(Ground) and VCCQ/VCCQ2.

Signed-off-by: Ziqi Chen <>
 drivers/scsi/ufs/ufs-qcom.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/scsi/ufs/ufs-qcom.c b/drivers/scsi/ufs/ufs-qcom.c
index 2206b1e..d8b896c 100644
--- a/drivers/scsi/ufs/ufs-qcom.c
+++ b/drivers/scsi/ufs/ufs-qcom.c
@@ -582,6 +582,10 @@ static int ufs_qcom_suspend(struct ufs_hba *hba, enum ufs_pm_op pm_op)
+		/* reset the connected UFS device during power down */
+		if (host->device_reset)
+			gpiod_set_value_cansleep(host->device_reset, 1);
 	} else if (!ufs_qcom_is_link_active(hba)) {
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