diff options
| author | Linus Torvalds <torvalds@linux-foundation.org> | 2011-05-23 09:26:20 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2011-05-23 09:26:20 -0700 |
| commit | 6fad2b5b649fa1fa6ee7293222815f5b62499889 (patch) | |
| tree | c2f9735e8868d3ce5decb5a08c56e1a1cc9730af /Documentation/hwmon/coretemp | |
| parent | 19504828b4bee5e471bcd35e214bc6fd0d380692 (diff) | |
| parent | 4cc452758fd250bb5968c583d825bb0e68d65db0 (diff) | |
Merge branch 'hwmon-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/groeck/staging
* 'hwmon-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/groeck/staging:
hwmon: (coretemp) Fix checkpatch errors
hwmon: Remove pkgtemp driver
hwmon: (coretemp) Merge pkgtemp with coretemp
hwmon: (pmbus) Add support for Analog Devices ADM1275
hwmon: (pmbus) Support for TI UCD90xxx series Sequencer and System Health Controllers
hwmon: (pmbus) Add support for TI UCD9200 series of PWM System Controllers
hwmon: (pmbus) Use device specific function to read fan configuration
hwmon: (pmbus) Expand scope of device specific get_status function
hwmon: (pmbus) Introduce infrastructure to detect sensors and limit registers
hwmon: Driver for MAX16065 System Manager and compatibles
hwmon: (sht15) add support for CRC validation
hwmon: (sht15) add support for the status register
hwmon: (sht15) clean-up the probe function
hwmon: (sht15) general code clean-up
hwmon: Add support for MAX6642
Diffstat (limited to 'Documentation/hwmon/coretemp')
| -rw-r--r-- | Documentation/hwmon/coretemp | 21 |
1 files changed, 14 insertions, 7 deletions
diff --git a/Documentation/hwmon/coretemp b/Documentation/hwmon/coretemp index 25568f84480..f85e913a340 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 |