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