linux-kernel - [PATCH v6 0/2] Add temperature notification support

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Message-Id: <20210914202731.5242-1-avri.altman@wdc.com>
Date:   Tue, 14 Sep 2021 23:27:29 +0300
From:   Avri Altman <avri.altman@....com>
To:     "James E . J . Bottomley" <jejb@...ux.vnet.ibm.com>,
        "Martin K . Petersen" <martin.petersen@...cle.com>
Cc:     linux-scsi@...r.kernel.org, linux-kernel@...r.kernel.org,
        Bart Van Assche <bvanassche@....org>,
        Adrian Hunter <adrian.hunter@...el.com>,
        Bean Huo <beanhuo@...ron.com>,
        Guenter Roeck <linux@...ck-us.net>,
        Avri Altman <avri.altman@....com>
Subject: [PATCH v6 0/2] Add temperature notification support

v5 -> v6:
 - remove useless initializations
 
v4 - > v5:
 - Fix improper return error values
 
v3 -> v4:
 - Attend Guenter's comments

v2 -> v3:
 - Attend Bart's & Guenter's comments

v1 -> v2:
 - Add a hw monitor device if both the platform & the device support it
 - Remove the sysfs patch: no need to duplicate /sys/class/hwmon

UFS3.0 allows using the ufs device as a temperature sensor. The purpose
of this optional feature is to provide notification to the host of the
UFS device case temperature. It allows reading of a rough estimate
(+-10 degrees centigrade) of the current case temperature, and setting a
lower and upper temperature bounds, in which the device will trigger an
applicable exception event.

A previous attempt [1] tried a comprehensive approach.  Still, it was
unsuccessful. Here is a more modest approach that introduces just the
bare minimum to support temperature notification.

Thanks,
Avri

[1] https://lore.kernel.org/lkml/1582450522-13256-1-git-send-email-avi.shchislowski@wdc.com/

Avri Altman (2):
  scsi: ufs: Probe for temperature notification support
  scsi: ufs: Add temperature notification exception handling

 drivers/scsi/ufs/Kconfig     |   9 ++
 drivers/scsi/ufs/Makefile    |   1 +
 drivers/scsi/ufs/ufs-hwmon.c | 213 +++++++++++++++++++++++++++++++++++
 drivers/scsi/ufs/ufs.h       |   7 ++
 drivers/scsi/ufs/ufshcd.c    |  47 ++++++++
 drivers/scsi/ufs/ufshcd.h    |  20 ++++
 6 files changed, 297 insertions(+)
 create mode 100644 drivers/scsi/ufs/ufs-hwmon.c

-- 
2.17.1