From: <peter.wang@mediatek.com>
To: <stanley.chu@mediatek.com>, <linux-scsi@vger.kernel.org>,
<martin.petersen@oracle.com>, <avri.altman@wdc.com>,
<alim.akhtar@samsung.com>, <jejb@linux.ibm.com>
Cc: <wsd_upstream@mediatek.com>, <peter.wang@mediatek.com>,
<chun-hung.wu@mediatek.com>, <alice.chao@mediatek.com>,
<cc.chou@mediatek.com>, <chaotian.jing@mediatek.com>,
<jiajie.hao@mediatek.com>
Subject: scsi: ufs-mediatek: fix ufs power down specs violation
Date: Wed, 12 May 2021 17:41:15 +0800 [thread overview]
Message-ID: <1620812476-23730-1-git-send-email-peter.wang@mediatek.com> (raw)
As per specs, e.g, JESD220E chapter 7.2, while powering off
the ufs device, RST_N signal should be between VSS(Ground)
and VCCQ/VCCQ2. The power down sequence after fixing as below:
Power down:
1. Assert RST_N low
2. Turn-off VCC
3. Turn-off VCCQ/VCCQ2
drivers/scsi/ufs/ufs-mediatek.c | 4 ++++
1 file changed, 4 insertions(+)
next reply other threads:[~2021-05-12 9:41 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-05-12 9:41 peter.wang [this message]
2021-05-12 9:41 ` [PATCH v3 1/1] scsi: ufs-mediatek: fix ufs power down specs violation peter.wang
-- strict thread matches above, loose matches on Subject: below --
2021-05-12 9:15 peter.wang
2021-05-12 8:39 peter.wang
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