linux-toradex.git/Documentation/hwmon/coretemp, branch v4.2.6

hwmon: (coretemp) Document and add support for additional CPU models

2013-01-26T05:03:55+00:00

Cc: Fenghua Yu 
Signed-off-by: Guenter Roeck

hwmon: (coretemp) List TjMax for Z650/670 and N550/570

2012-12-05T18:55:55+00:00

as per processor data sheets.

Signed-off-by: Guenter Roeck 
Acked-by: Jean Delvare

hwmon: (coretemp) Add support for Atom CE4110/4150/4170

2012-10-14T22:21:33+00:00

TjMax for the CE4100 series of Atom CPUs was previously reported to be
110 degrees C.

cpuinfo logs on the web show existing CPU types CE4110, CE4150, and CE4170,
reported as "model name : Intel(R) Atom(TM) CPU CE41{1|5|7}0 @ 1.{2|6}0GHz"
with model 28 (0x1c) and stepping 10 (0x0a). Add the three known variants
to the tjmax table.

Signed-off-by: Guenter Roeck 
cc: stable@vger.kernel.org
Acked-by: Jean Delvare

hwmon: (coretemp) Document TjMax for 3rd generation i5/i7 processors

2012-06-17T16:05:06+00:00

Tjmax values from Intel datasheets.

Signed-off-by: Guenter Roeck 
Signed-off-by: Jean Delvare

hwmon: (coretemp) Add support for Atom D2000 and N2000 series CPU models

2012-06-17T16:05:05+00:00

Document the Atom series D2000 and N2000 (Cedar Trail) as being supported.
List and set TjMax for those series.

Cc: Fenghua Yu 
Cc: "R, Durgadoss" 
Signed-off-by: Guenter Roeck 
Signed-off-by: Jean Delvare

hwmon: (coretemp) Improve support of recent Atom CPU models

2012-06-17T16:05:05+00:00

Document the new Atom series (Tunnel Creek and Medfield) as being
supported, and list TjMax for the Atom E600 series.

Also enable the Atom tjmax heuristic for these Atom CPU models.

Signed-off-by: Jean Delvare 
Reviewed-by: Guenter Roeck 
Cc: Alexander Stein 
Cc: Fenghua Yu 
Cc: "R, Durgadoss"

hwmon: (coretemp) Don't use threshold registers for tempX_max

2011-09-22T00:25:18+00:00

With commit c814a4c7c4aad795835583344353963a0a673eb0, the meaning of tempX_max
was changed. It no longer returns the value of bits 8:15 of
MSR_IA32_TEMPERATURE_TARGET, but instead returns the value of CPU threshold
register T1. tempX_max_hyst was added to reflect the value of temperature
threshold register T0.

As it turns out, T0 and T1 are used on some systems, presumably by the BIOS.
Also, T0 and T1 don't have a well defined meaning. The thresholds may be used
as upper or lower limits, and it is not guaranteed that T0 <= T1. Thus, the new
attribute mapping does not reflect the actual usage of the threshold registers.
Also, register contents are changed during runtime by an entity other than the
hwmon driver, meaning the values cached by the driver do not reflect actual
register contents.

Revert most of c814a4c7c4aad795835583344353963a0a673eb0 to address the problem.
Support for T0 and T1 will be added back in with a separate commit, using new
attribute names.

Signed-off-by: Guenter Roeck 
Cc: Fenghua Yu 
Cc: Durgadoss R 
Acked-by: Jean Delvare

hwmon: (coretemp) Let the user force TjMax

2011-09-22T00:25:18+00:00

On old CPUs (and even some recent Atom CPUs) TjMax can't be read from
the CPU registers, so it is guessed by the driver using a complex
heuristic which isn't reliable. So let users who know their CPU's
TjMax pass it as a module parameter.

Signed-off-by: Jean Delvare 
Cc: Fenghua Yu 
Cc: "R, Durgadoss" 
Cc: Guenter Roeck 
Cc: Alexander Stein 
Acked-by: Fenghua Yu 
Signed-off-by: Guenter Roeck

hwmon: (coretemp) Add core/pkg threshold support to Coretemp

2011-07-28T07:17:36+00:00

This patch adds the core and pkg support to coretemp.
These thresholds can be configured via the sysfs interfaces tempX_max
and tempX_max_hyst. An interrupt is generated when CPU temperature reaches
or crosses above tempX_max OR drops below tempX_max_hyst.

This patch is based on the documentation in IA Manual vol 3A, that can be
downloaded from here:
http://download.intel.com/design/processor/manuals/253668.pdf

Signed-off-by: Durgadoss R 
Signed-off-by: Guenter Roeck

hwmon: (coretemp) Merge pkgtemp with coretemp

2011-05-20T14:04:49+00:00

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: Durgadoss R 
Cc: Fenghua Yu 
[guenter.roeck@ericsson.com: Fixed section reference errors]
Signed-off-by: Guenter Roeck