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authorLinus Torvalds <torvalds@linux-foundation.org>2009-12-17 19:48:08 -0500
committerLinus Torvalds <torvalds@linux-foundation.org>2009-12-17 19:48:08 -0500
commite82b1dae2a8730c89e2a30c5c28562ef066f39d9 (patch)
tree4811b7fd81c45d6d9b35bbd0519f8bc232dde616 /Documentation
parentfc6f0700d5cd54b5f8b30c4f0d93b06a6ba04b81 (diff)
parentc46c0e9188685c0276b4c0adf9fb7e903937e35b (diff)
Merge branch 'hwmon-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jdelvare/staging
* 'hwmon-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jdelvare/staging: hwmon: (w83627hf) Fix for "No such device" hwmon: (sht15) Off-by-one error in array index + incorrect constants hwmon: Add driver for VIA CPU core temperature hwmon: (smsc47m1) Enable device if needed hwmon: (smsc47m1) Fail module loading on error hwmon: (smsc47m1) Only request I/O ports we really use hwmon: New driver for AMD Family 10h/11h CPUs
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1Kernel driver k10temp
2=====================
3
4Supported chips:
5* AMD Family 10h processors:
6 Socket F: Quad-Core/Six-Core/Embedded Opteron
7 Socket AM2+: Opteron, Phenom (II) X3/X4
8 Socket AM3: Quad-Core Opteron, Athlon/Phenom II X2/X3/X4, Sempron II
9 Socket S1G3: Athlon II, Sempron, Turion II
10* AMD Family 11h processors:
11 Socket S1G2: Athlon (X2), Sempron (X2), Turion X2 (Ultra)
12
13 Prefix: 'k10temp'
14 Addresses scanned: PCI space
15 Datasheets:
16 BIOS and Kernel Developer's Guide (BKDG) For AMD Family 10h Processors:
17 http://support.amd.com/us/Processor_TechDocs/31116.pdf
18 BIOS and Kernel Developer's Guide (BKDG) for AMD Family 11h Processors:
19 http://support.amd.com/us/Processor_TechDocs/41256.pdf
20 Revision Guide for AMD Family 10h Processors:
21 http://support.amd.com/us/Processor_TechDocs/41322.pdf
22 Revision Guide for AMD Family 11h Processors:
23 http://support.amd.com/us/Processor_TechDocs/41788.pdf
24 AMD Family 11h Processor Power and Thermal Data Sheet for Notebooks:
25 http://support.amd.com/us/Processor_TechDocs/43373.pdf
26 AMD Family 10h Server and Workstation Processor Power and Thermal Data Sheet:
27 http://support.amd.com/us/Processor_TechDocs/43374.pdf
28 AMD Family 10h Desktop Processor Power and Thermal Data Sheet:
29 http://support.amd.com/us/Processor_TechDocs/43375.pdf
30
31Author: Clemens Ladisch <clemens@ladisch.de>
32
33Description
34-----------
35
36This driver permits reading of the internal temperature sensor of AMD
37Family 10h and 11h processors.
38
39All these processors have a sensor, but on older revisions of Family 10h
40processors, the sensor may return inconsistent values (erratum 319). The
41driver will refuse to load on these revisions unless you specify the
42"force=1" module parameter.
43
44There is one temperature measurement value, available as temp1_input in
45sysfs. It is measured in degrees Celsius with a resolution of 1/8th degree.
46Please note that it is defined as a relative value; to quote the AMD manual:
47
48 Tctl is the processor temperature control value, used by the platform to
49 control cooling systems. Tctl is a non-physical temperature on an
50 arbitrary scale measured in degrees. It does _not_ represent an actual
51 physical temperature like die or case temperature. Instead, it specifies
52 the processor temperature relative to the point at which the system must
53 supply the maximum cooling for the processor's specified maximum case
54 temperature and maximum thermal power dissipation.
55
56The maximum value for Tctl is available in the file temp1_max.
57
58If the BIOS has enabled hardware temperature control, the threshold at
59which the processor will throttle itself to avoid damage is available in
60temp1_crit and temp1_crit_hyst.