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" (FX-Series), "Trinity", "Kaveri", "Carrizo"
15* AMD Family 16h processors: "Kabini", "Mullins"
16
17  Prefix: 'k10temp'
18  Addresses scanned: PCI space
19  Datasheets:
20  BIOS and Kernel Developer's Guide (BKDG) For AMD Family 10h Processors:
21    http://support.amd.com/us/Processor_TechDocs/31116.pdf
22  BIOS and Kernel Developer's Guide (BKDG) for AMD Family 11h Processors:
23    http://support.amd.com/us/Processor_TechDocs/41256.pdf
24  BIOS and Kernel Developer's Guide (BKDG) for AMD Family 12h Processors:
25    http://support.amd.com/us/Processor_TechDocs/41131.pdf
26  BIOS and Kernel Developer's Guide (BKDG) for AMD Family 14h Models 00h-0Fh Processors:
27    http://support.amd.com/us/Processor_TechDocs/43170.pdf
28  Revision Guide for AMD Family 10h Processors:
29    http://support.amd.com/us/Processor_TechDocs/41322.pdf
30  Revision Guide for AMD Family 11h Processors:
31    http://support.amd.com/us/Processor_TechDocs/41788.pdf
32  Revision Guide for AMD Family 12h Processors:
33    http://support.amd.com/us/Processor_TechDocs/44739.pdf
34  Revision Guide for AMD Family 14h Models 00h-0Fh Processors:
35    http://support.amd.com/us/Processor_TechDocs/47534.pdf
36  AMD Family 11h Processor Power and Thermal Data Sheet for Notebooks:
37    http://support.amd.com/us/Processor_TechDocs/43373.pdf
38  AMD Family 10h Server and Workstation Processor Power and Thermal Data Sheet:
39    http://support.amd.com/us/Processor_TechDocs/43374.pdf
40  AMD Family 10h Desktop Processor Power and Thermal Data Sheet:
41    http://support.amd.com/us/Processor_TechDocs/43375.pdf
42
43Author: Clemens Ladisch <clemens@ladisch.de>
44
45Description
46-----------
47
48This driver permits reading of the internal temperature sensor of AMD
49Family 10h/11h/12h/14h/15h/16h processors.
50
51All these processors have a sensor, but on those for Socket F or AM2+,
52the sensor may return inconsistent values (erratum 319).  The driver
53will refuse to load on these revisions unless you specify the "force=1"
54module parameter.
55
56Due to technical reasons, the driver can detect only the mainboard's
57socket type, not the processor's actual capabilities.  Therefore, if you
58are using an AM3 processor on an AM2+ mainboard, you can safely use the
59"force=1" parameter.
60
61There is one temperature measurement value, available as temp1_input in
62sysfs. It is measured in degrees Celsius with a resolution of 1/8th degree.
63Please note that it is defined as a relative value; to quote the AMD manual:
64
65  Tctl is the processor temperature control value, used by the platform to
66  control cooling systems. Tctl is a non-physical temperature on an
67  arbitrary scale measured in degrees. It does _not_ represent an actual
68  physical temperature like die or case temperature. Instead, it specifies
69  the processor temperature relative to the point at which the system must
70  supply the maximum cooling for the processor's specified maximum case
71  temperature and maximum thermal power dissipation.
72
73The maximum value for Tctl is available in the file temp1_max.
74
75If the BIOS has enabled hardware temperature control, the threshold at
76which the processor will throttle itself to avoid damage is available in
77temp1_crit and temp1_crit_hyst.
78