diff --git a/Documentation/hwmon/coretemp b/Documentation/hwmon/coretemp index fec5a9bf755f..c609329e3bc4 100644 --- a/Documentation/hwmon/coretemp +++ b/Documentation/hwmon/coretemp @@ -3,20 +3,29 @@ Kernel driver coretemp Supported chips: * All Intel Core family + Prefix: 'coretemp' - CPUID: family 0x6, models 0xe (Pentium M DC), 0xf (Core 2 DC 65nm), - 0x16 (Core 2 SC 65nm), 0x17 (Penryn 45nm), - 0x1a (Nehalem), 0x1c (Atom), 0x1e (Lynnfield), - 0x26 (Tunnel Creek Atom), 0x27 (Medfield Atom), - 0x36 (Cedar Trail Atom) - Datasheet: Intel 64 and IA-32 Architectures Software Developer's Manual - Volume 3A: System Programming Guide - http://softwarecommunity.intel.com/Wiki/Mobility/720.htm + + CPUID: family 0x6, models + + - 0xe (Pentium M DC), 0xf (Core 2 DC 65nm), + - 0x16 (Core 2 SC 65nm), 0x17 (Penryn 45nm), + - 0x1a (Nehalem), 0x1c (Atom), 0x1e (Lynnfield), + - 0x26 (Tunnel Creek Atom), 0x27 (Medfield Atom), + - 0x36 (Cedar Trail Atom) + + Datasheet: + + Intel 64 and IA-32 Architectures Software Developer's Manual + Volume 3A: System Programming Guide + + http://softwarecommunity.intel.com/Wiki/Mobility/720.htm Author: Rudolf Marek Description ----------- + This driver permits reading the DTS (Digital Temperature Sensor) embedded inside Intel CPUs. This driver can read both the per-core and per-package temperature using the appropriate sensors. The per-package sensor is new; @@ -35,14 +44,17 @@ may be raised, if the temperature grows enough (more than TjMax) to trigger the Out-Of-Spec bit. Following table summarizes the exported sysfs files: All Sysfs entries are named with their core_id (represented here by 'X'). -tempX_input - Core temperature (in millidegrees Celsius). -tempX_max - All cooling devices should be turned on (on Core2). -tempX_crit - Maximum junction temperature (in millidegrees Celsius). -tempX_crit_alarm - Set when Out-of-spec bit is set, never clears. - Correct CPU operation is no longer guaranteed. -tempX_label - Contains string "Core X", where X is processor - number. For Package temp, this will be "Physical id Y", - where Y is the package number. + +================= ======================================================== +tempX_input Core temperature (in millidegrees Celsius). +tempX_max All cooling devices should be turned on (on Core2). +tempX_crit Maximum junction temperature (in millidegrees Celsius). +tempX_crit_alarm Set when Out-of-spec bit is set, never clears. + Correct CPU operation is no longer guaranteed. +tempX_label Contains string "Core X", where X is processor + number. For Package temp, this will be "Physical id Y", + where Y is the package number. +================= ======================================================== On CPU models which support it, TjMax is read from a model-specific register. On other models, it is set to an arbitrary value based on weak heuristics. @@ -52,6 +64,7 @@ as a module parameter (tjmax). Appendix A. Known TjMax lists (TBD): Some information comes from ark.intel.com +=============== =============================================== ================ Process Processor TjMax(C) 22nm Core i5/i7 Processors @@ -179,3 +192,4 @@ Process Processor TjMax(C) 65nm Celeron Processors T1700/1600 100 560/550/540/530 100 +=============== =============================================== ================