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@xxxxxxx/ Avri Altman (2): scsi: ufs: Probe for temperature notification support scsi: ufs: Add temperature notification exception handling drivers/scsi/ufs/Kconfig | 10 ++ drivers/scsi/ufs/Makefile | 1 + drivers/scsi/ufs/ufs-hwmon.c | 193 +++++++++++++++++++++++++++++++++++ drivers/scsi/ufs/ufs.h | 8 ++ drivers/scsi/ufs/ufshcd.c | 49 +++++++++ drivers/scsi/ufs/ufshcd.h | 20 ++++ 6 files changed, 281 insertions(+) create mode 100644 drivers/scsi/ufs/ufs-hwmon.c -- 2.17.1
