1Kernel driver k10temp
2=====================
3
4Supported chips:
5* AMD Family 10h processors:
6  Socket F: Quad-Core/Six-Core/Embedded Opteron (but see below)
7  Socket AM2+: Quad-Core Opteron, Phenom (II) X3/X4, Athlon X2 (but see below)
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* AMD Family 12h processors: "Llano" (E2/A4/A6/A8-Series)
13* AMD Family 14h processors: "Brazos" (C/E/G/Z-Series)
14* AMD Family 15h processors: "Bulldozer"
15
16  Prefix: 'k10temp'
17  Addresses scanned: PCI space
18  Datasheets:
19  BIOS and Kernel Developer's Guide (BKDG) For AMD Family 10h Processors:
20    http://support.amd.com/us/Processor_TechDocs/31116.pdf
21  BIOS and Kernel Developer's Guide (BKDG) for AMD Family 11h Processors:
22    http://support.amd.com/us/Processor_TechDocs/41256.pdf
23  BIOS and Kernel Developer's Guide (BKDG) for AMD Family 12h Processors:
24    http://support.amd.com/us/Processor_TechDocs/41131.pdf
25  BIOS and Kernel Developer's Guide (BKDG) for AMD Family 14h Models 00h-0Fh Processors:
26    http://support.amd.com/us/Processor_TechDocs/43170.pdf
27  Revision Guide for AMD Family 10h Processors:
28    http://support.amd.com/us/Processor_TechDocs/41322.pdf
29  Revision Guide for AMD Family 11h Processors:
30    http://support.amd.com/us/Processor_TechDocs/41788.pdf
31  Revision Guide for AMD Family 12h Processors:
32    http://support.amd.com/us/Processor_TechDocs/44739.pdf
33  Revision Guide for AMD Family 14h Models 00h-0Fh Processors:
34    http://support.amd.com/us/Processor_TechDocs/47534.pdf
35  AMD Family 11h Processor Power and Thermal Data Sheet for Notebooks:
36    http://support.amd.com/us/Processor_TechDocs/43373.pdf
37  AMD Family 10h Server and Workstation Processor Power and Thermal Data Sheet:
38    http://support.amd.com/us/Processor_TechDocs/43374.pdf
39  AMD Family 10h Desktop Processor Power and Thermal Data Sheet:
40    http://support.amd.com/us/Processor_TechDocs/43375.pdf
41
42Author: Clemens Ladisch <clemens@ladisch.de>
43
44Description
45-----------
46
47This driver permits reading of the internal temperature sensor of AMD
48Family 10h/11h/12h/14h/15h processors.
49
50All these processors have a sensor, but on those for Socket F or AM2+,
51the sensor may return inconsistent values (erratum 319).  The driver
52will refuse to load on these revisions unless you specify the "force=1"
53module parameter.
54
55Due to technical reasons, the driver can detect only the mainboard's
56socket type, not the processor's actual capabilities.  Therefore, if you
57are using an AM3 processor on an AM2+ mainboard, you can safely use the
58"force=1" parameter.
59
60There is one temperature measurement value, available as temp1_input in
61sysfs. It is measured in degrees Celsius with a resolution of 1/8th degree.
62Please note that it is defined as a relative value; to quote the AMD manual:
63
64  Tctl is the processor temperature control value, used by the platform to
65  control cooling systems. Tctl is a non-physical temperature on an
66  arbitrary scale measured in degrees. It does _not_ represent an actual
67  physical temperature like die or case temperature. Instead, it specifies
68  the processor temperature relative to the point at which the system must
69  supply the maximum cooling for the processor's specified maximum case
70  temperature and maximum thermal power dissipation.
71
72The maximum value for Tctl is available in the file temp1_max.
73
74If the BIOS has enabled hardware temperature control, the threshold at
75which the processor will throttle itself to avoid damage is available in
76temp1_crit and temp1_crit_hyst.
77