@@ -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
+=============== =============================================== ================
Convert coretemp to ReST format, in order to allow it to be parsed by Sphinx. Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org> --- Documentation/hwmon/coretemp | 46 +++++++++++++++++++++++------------- 1 file changed, 30 insertions(+), 16 deletions(-)