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 (3): scsi: ufs: Probe for temperature notification support scsi: ufs: Add temperature notification exception handling scsi: ufs-sysfs: Add sysfs entries for temperature notification Documentation/ABI/testing/sysfs-driver-ufs | 38 +++++++++++++ drivers/scsi/ufs/ufs-sysfs.c | 63 +++++++++++++++++++++- drivers/scsi/ufs/ufs.h | 12 +++++ drivers/scsi/ufs/ufshcd.c | 28 ++++++++++ drivers/scsi/ufs/ufshcd.h | 29 ++++++++++ 5 files changed, 169 insertions(+), 1 deletion(-) -- 2.17.1
