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This adds a driver for the internal temperature sensor of AMD Family 10h and 11h CPUs. Signed-off-by: Clemens Ladisch <clemens@ladisch.de> Signed-off-by: Jean Delvare <khali@linux-fr.org>
61 lines
2.6 KiB
Plaintext
61 lines
2.6 KiB
Plaintext
Kernel driver k10temp
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=====================
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Supported chips:
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* AMD Family 10h processors:
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Socket F: Quad-Core/Six-Core/Embedded Opteron
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Socket AM2+: Opteron, Phenom (II) X3/X4
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Socket AM3: Quad-Core Opteron, Athlon/Phenom II X2/X3/X4, Sempron II
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Socket S1G3: Athlon II, Sempron, Turion II
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* AMD Family 11h processors:
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Socket S1G2: Athlon (X2), Sempron (X2), Turion X2 (Ultra)
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Prefix: 'k10temp'
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Addresses scanned: PCI space
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Datasheets:
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BIOS and Kernel Developer's Guide (BKDG) For AMD Family 10h Processors:
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http://support.amd.com/us/Processor_TechDocs/31116.pdf
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BIOS and Kernel Developer's Guide (BKDG) for AMD Family 11h Processors:
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http://support.amd.com/us/Processor_TechDocs/41256.pdf
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Revision Guide for AMD Family 10h Processors:
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http://support.amd.com/us/Processor_TechDocs/41322.pdf
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Revision Guide for AMD Family 11h Processors:
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http://support.amd.com/us/Processor_TechDocs/41788.pdf
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AMD Family 11h Processor Power and Thermal Data Sheet for Notebooks:
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http://support.amd.com/us/Processor_TechDocs/43373.pdf
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AMD Family 10h Server and Workstation Processor Power and Thermal Data Sheet:
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http://support.amd.com/us/Processor_TechDocs/43374.pdf
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AMD Family 10h Desktop Processor Power and Thermal Data Sheet:
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http://support.amd.com/us/Processor_TechDocs/43375.pdf
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Author: Clemens Ladisch <clemens@ladisch.de>
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Description
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-----------
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This driver permits reading of the internal temperature sensor of AMD
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Family 10h and 11h processors.
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All these processors have a sensor, but on older revisions of Family 10h
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processors, the sensor may return inconsistent values (erratum 319). The
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driver will refuse to load on these revisions unless you specify the
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"force=1" module parameter.
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There is one temperature measurement value, available as temp1_input in
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sysfs. It is measured in degrees Celsius with a resolution of 1/8th degree.
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Please note that it is defined as a relative value; to quote the AMD manual:
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Tctl is the processor temperature control value, used by the platform to
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control cooling systems. Tctl is a non-physical temperature on an
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arbitrary scale measured in degrees. It does _not_ represent an actual
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physical temperature like die or case temperature. Instead, it specifies
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the processor temperature relative to the point at which the system must
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supply the maximum cooling for the processor's specified maximum case
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temperature and maximum thermal power dissipation.
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The maximum value for Tctl is available in the file temp1_max.
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If the BIOS has enabled hardware temperature control, the threshold at
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which the processor will throttle itself to avoid damage is available in
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temp1_crit and temp1_crit_hyst.
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