X-Git-Url: https://git.openpandora.org/cgi-bin/gitweb.cgi?p=pandora-kernel.git;a=blobdiff_plain;f=Documentation%2Fhwmon%2Fcoretemp;h=f85e913a34011525f24d839e5e82aa3c295b552f;hp=25568f844804d7d5cc43560898251c85eca2c912;hb=2bb732cdb48d271ff7a910260ffb851fb4bc8a28;hpb=c9e2a72ff1acfdffdecb338b3d997f90c507e665 diff --git a/Documentation/hwmon/coretemp b/Documentation/hwmon/coretemp index 25568f844804..f85e913a3401 100644 --- a/Documentation/hwmon/coretemp +++ b/Documentation/hwmon/coretemp @@ -15,8 +15,13 @@ Author: Rudolf Marek Description ----------- +This driver permits reading the DTS (Digital Temperature Sensor) embedded +inside Intel CPUs. This driver can read both the per-core and per-package +temperature using the appropriate sensors. The per-package sensor is new; +as of now, it is present only in the SandyBridge platform. The driver will +show the temperature of all cores inside a package under a single device +directory inside hwmon. -This driver permits reading temperature sensor embedded inside Intel Core CPU. Temperature is measured in degrees Celsius and measurement resolution is 1 degree C. Valid temperatures are from 0 to TjMax degrees C, because the actual value of temperature register is in fact a delta from TjMax. @@ -27,13 +32,15 @@ mechanism will perform actions to forcibly cool down the processor. Alarm may be raised, if the temperature grows enough (more than TjMax) to trigger the Out-Of-Spec bit. Following table summarizes the exported sysfs files: -temp1_input - Core temperature (in millidegrees Celsius). -temp1_max - All cooling devices should be turned on (on Core2). -temp1_crit - Maximum junction temperature (in millidegrees Celsius). -temp1_crit_alarm - Set when Out-of-spec bit is set, never clears. +All Sysfs entries are named with their core_id (represented here by 'X'). +tempX_input - Core temperature (in millidegrees Celsius). +tempX_max - All cooling devices should be turned on (on Core2). +tempX_crit - Maximum junction temperature (in millidegrees Celsius). +tempX_crit_alarm - Set when Out-of-spec bit is set, never clears. Correct CPU operation is no longer guaranteed. -temp1_label - Contains string "Core X", where X is processor - number. +tempX_label - Contains string "Core X", where X is processor + number. For Package temp, this will be "Physical id Y", + where Y is the package number. The TjMax temperature is set to 85 degrees C if undocumented model specific register (UMSR) 0xee has bit 30 set. If not the TjMax is 100 degrees C as