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author | Clemens Ladisch <clemens@ladisch.de> | 2009-12-16 21:38:25 +0100 |
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committer | Jean Delvare <khali@linux-fr.org> | 2009-12-16 21:38:25 +0100 |
commit | 3c57e89b467d1db6fda74d5c97112c8b9466dd97 (patch) | |
tree | d826e1bff6ac786adf2ee68c403b011a16448b77 /Documentation | |
parent | 8bea8672edfca7ec5f661cafb218f1205863b343 (diff) | |
download | linux-3.10-3c57e89b467d1db6fda74d5c97112c8b9466dd97.tar.gz linux-3.10-3c57e89b467d1db6fda74d5c97112c8b9466dd97.tar.bz2 linux-3.10-3c57e89b467d1db6fda74d5c97112c8b9466dd97.zip |
hwmon: New driver for AMD Family 10h/11h CPUs
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>
Diffstat (limited to 'Documentation')
-rw-r--r-- | Documentation/hwmon/k10temp | 60 |
1 files changed, 60 insertions, 0 deletions
diff --git a/Documentation/hwmon/k10temp b/Documentation/hwmon/k10temp new file mode 100644 index 00000000000..a7a18d453a5 --- /dev/null +++ b/Documentation/hwmon/k10temp @@ -0,0 +1,60 @@ +Kernel driver k10temp +===================== + +Supported chips: +* AMD Family 10h processors: + Socket F: Quad-Core/Six-Core/Embedded Opteron + Socket AM2+: Opteron, Phenom (II) X3/X4 + Socket AM3: Quad-Core Opteron, Athlon/Phenom II X2/X3/X4, Sempron II + Socket S1G3: Athlon II, Sempron, Turion II +* AMD Family 11h processors: + Socket S1G2: Athlon (X2), Sempron (X2), Turion X2 (Ultra) + + Prefix: 'k10temp' + Addresses scanned: PCI space + Datasheets: + BIOS and Kernel Developer's Guide (BKDG) For AMD Family 10h Processors: + http://support.amd.com/us/Processor_TechDocs/31116.pdf + BIOS and Kernel Developer's Guide (BKDG) for AMD Family 11h Processors: + http://support.amd.com/us/Processor_TechDocs/41256.pdf + Revision Guide for AMD Family 10h Processors: + http://support.amd.com/us/Processor_TechDocs/41322.pdf + Revision Guide for AMD Family 11h Processors: + http://support.amd.com/us/Processor_TechDocs/41788.pdf + AMD Family 11h Processor Power and Thermal Data Sheet for Notebooks: + http://support.amd.com/us/Processor_TechDocs/43373.pdf + AMD Family 10h Server and Workstation Processor Power and Thermal Data Sheet: + http://support.amd.com/us/Processor_TechDocs/43374.pdf + AMD Family 10h Desktop Processor Power and Thermal Data Sheet: + http://support.amd.com/us/Processor_TechDocs/43375.pdf + +Author: Clemens Ladisch <clemens@ladisch.de> + +Description +----------- + +This driver permits reading of the internal temperature sensor of AMD +Family 10h and 11h processors. + +All these processors have a sensor, but on older revisions of Family 10h +processors, the sensor may return inconsistent values (erratum 319). The +driver will refuse to load on these revisions unless you specify the +"force=1" module parameter. + +There is one temperature measurement value, available as temp1_input in +sysfs. It is measured in degrees Celsius with a resolution of 1/8th degree. +Please note that it is defined as a relative value; to quote the AMD manual: + + Tctl is the processor temperature control value, used by the platform to + control cooling systems. Tctl is a non-physical temperature on an + arbitrary scale measured in degrees. It does _not_ represent an actual + physical temperature like die or case temperature. Instead, it specifies + the processor temperature relative to the point at which the system must + supply the maximum cooling for the processor's specified maximum case + temperature and maximum thermal power dissipation. + +The maximum value for Tctl is available in the file temp1_max. + +If the BIOS has enabled hardware temperature control, the threshold at +which the processor will throttle itself to avoid damage is available in +temp1_crit and temp1_crit_hyst. |