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Commit 199e0de7 authored by Durgadoss R's avatar Durgadoss R Committed by Guenter Roeck
Browse files

hwmon: (coretemp) Merge pkgtemp with coretemp 



This patch merges the pkgtemp with coretemp driver.
The sysfs interfaces for all cores in the same pkg
are shown under one directory, in hwmon. It also
supports CONFIG_HOTPLUG_CPU. So, the sysfs interfaces
are created when each core comes online and are
removed when it goes offline.

Signed-off-by: default avatarDurgadoss R <durgadoss.r@intel.com>
Cc: Fenghua Yu <fenghua.yu@intel.com>
[guenter.roeck@ericsson.com: Fixed section reference errors]
Signed-off-by: default avatarGuenter Roeck <guenter.roeck@ericsson.com>
parent 83f7649c

Documentation/hwmon/coretemp

+14 −7
Original line number Diff line number Diff line
@@ -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

drivers/hwmon/coretemp.c

+455 −210

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