Documentation/hwmon/peci-dimmtemp.rst

   1 .. SPDX-License-Identifier: GPL-2.0
   2
   3 Kernel driver peci-dimmtemp
   4 ===========================
   5
   6 Supported chips:
   7         One of Intel server CPUs listed below which is connected to a PECI bus.
   8                 * Intel Xeon E5/E7 v3 server processors
   9                         Intel Xeon E5-14xx v3 family
  10                         Intel Xeon E5-24xx v3 family
  11                         Intel Xeon E5-16xx v3 family
  12                         Intel Xeon E5-26xx v3 family
  13                         Intel Xeon E5-46xx v3 family
  14                         Intel Xeon E7-48xx v3 family
  15                         Intel Xeon E7-88xx v3 family
  16                 * Intel Xeon E5/E7 v4 server processors
  17                         Intel Xeon E5-16xx v4 family
  18                         Intel Xeon E5-26xx v4 family
  19                         Intel Xeon E5-46xx v4 family
  20                         Intel Xeon E7-48xx v4 family
  21                         Intel Xeon E7-88xx v4 family
  22                 * Intel Xeon Scalable server processors
  23                         Intel Xeon D family
  24                         Intel Xeon Bronze family
  25                         Intel Xeon Silver family
  26                         Intel Xeon Gold family
  27                         Intel Xeon Platinum family
  28
  29         Datasheet: Available from http://www.intel.com/design/literature.htm
  30
  31 Author: Jae Hyun Yoo <jae.hyun.yoo@linux.intel.com>
  32
  33 Description
  34 -----------
  35
  36 This driver implements a generic PECI hwmon feature which provides
  37 Temperature sensor on DIMM readings that are accessible via the processor PECI interface.
  38
  39 All temperature values are given in millidegree Celsius and will be measurable
  40 only when the target CPU is powered on.
  41
  42 Sysfs interface
  43 -------------------
  44
  45 ======================= =======================================================
  46
  47 temp[N]_label           Provides string "DIMM CI", where C is DIMM channel and
  48                         I is DIMM index of the populated DIMM.
  49 temp[N]_input           Provides current temperature of the populated DIMM.
  50 temp[N]_max             Provides thermal control temperature of the DIMM.
  51 temp[N]_crit            Provides shutdown temperature of the DIMM.
  52
  53 ======================= =======================================================
  54
  55 Note:
  56         DIMM temperature attributes will appear when the client CPU's BIOS
  57         completes memory training and testing.