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2009-03-27thermal: support forcing support for passive coolingMatthew Garrett1-0/+77
Due to poor thermal design or Linux driving hardware outside its thermal envelope, some systems will reach critical temperature and shut down under high load. This patch adds support for forcing a polling-based passive trip point if the firmware doesn't provide one. The assumption is made that the processor is the most practical means to reduce the dynamic heat generation, so hitting the passive thermal limit will cause the CPU to be throttled until the temperature stabalises around the defined value. UI is provided via a "passive" sysfs entry in the thermal zone directory. It accepts a decimal value in millidegrees celsius, or "0" to disable the functionality. Default behaviour is for this functionality to be disabled. Signed-off-by: Matthew Garrett <mjg@redhat.com> Signed-off-by: Len Brown <len.brown@intel.com>
2009-02-21ACPI: move thermal trip handling to generic thermal layerMatthew Garrett1-2/+186
The ACPI code currently carries its own thermal trip handling, meaning that any other thermal implementation will need to reimplement it. Move the code to the generic thermal layer. Signed-off-by: Matthew Garrett <mjg@redhat.com> Signed-off-by: Len Brown <len.brown@intel.com>
2009-02-20thermal: use integers rather than strings for thermal valuesMatthew Garrett1-13/+78
The thermal API currently uses strings to pass values to userspace. This makes it difficult to use from within the kernel. Change the interface to use integers and fix up the consumers. Signed-off-by: Matthew Garrett <mjg@redhat.com> Acked-by: Zhang Rui <rui.zhang@intel.com> Acked-by: Thomas Renninger <trenn@suse.de> Signed-off-by: Len Brown <len.brown@intel.com>
2009-01-06thermal: struct device - replace bus_id with dev_name(), dev_set_name()Kay Sievers1-3/+3
Signed-off-by: Kay Sievers <kay.sievers@vrfy.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2008-06-26thermal: Create CONFIG_THERMAL_HWMON=nRene Herman2-2/+11
A bug in libsensors <= 2.10.6 is exposed when this new hwmon I/F is enabled. Create CONFIG_THERMAL_HWMON=n until some time after libsensors 2.10.7 ships so those users can run the latest kernel. libsensors 3.x is already fixed -- those users can use CONFIG_THERMAL_HWMON=y now. Signed-off-by: Rene Herman <rene.herman@gmail.com> Acked-by: Mark M. Hoffman <mhoffman@lightlink.com> Signed-off-by: Len Brown <len.brown@intel.com>
2008-04-29thermal: re-name thermal.c to thermal_sys.cLen Brown2-1/+0
thermal_sys was already the name of the resulting module, and it is built from this one source file. Signed-off-by: Len Brown <len.brown@intel.com>
2008-04-29thermal: add hwmon sysfs I/FZhang Rui1-0/+163
Add hwmon sys I/F for generic thermal driver. Note: we have one hwmon class device for EACH TYPE of the thermal zone device. Signed-off-by: Zhang Rui <rui.zhang@intel.com> Acked-by: Jean Delvare <khali@linux-fr.org> Signed-off-by: Len Brown <len.brown@intel.com>
2008-04-29thermal: add the support for building the generic thermal as a moduleZhang Rui3-4/+5
Build the generic thermal driver as module "thermal_sys". Make ACPI thermal, video, processor and fan SELECT the generic thermal driver, as these drivers rely on it to build the sysfs I/F. Signed-off-by: Zhang Rui <rui.zhang@intel.com> Acked-by: Jean Delvare <khali@linux-fr.org> Signed-off-by: Len Brown <len.brown@intel.com>
2008-04-16acpi thermal trip points increased to 12Krzysztof Helt1-0/+4
The THERMAL_MAX_TRIPS value is set to 10. It is too few for the Compaq AP550 machine which has 12 trip points. Signed-off-by: Krzysztof Helt <krzysztof.h1@wp.pl> Cc: Len Brown <lenb@kernel.org> Cc: Zhang Rui <rui.zhang@intel.com> Cc: "Rafael J. Wysocki" <rjw@sisk.pl> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-03-18thermal: delete "default y"Len Brown1-1/+0
The generic thermal I/F gets selected by ACPI_THERMAL -- its only current customer. it doesn't need to clutter other configs by default. Signed-off-by: Len Brown <len.brown@intel.com>
2008-03-18Revert "thermal: fix generic thermal I/F for hwmon"Len Brown2-144/+26
This reverts commit 3152fb9f11cdd2fd8688c2c5cb805e5c09b53dd9. This broke libsensors. Acked-by: Zhang Rui <rui.zhang@intel.com> Acked-by: Jean Delvare <khali@linux-fr.org> Signed-off-by: Len Brown <len.brown@intel.com>
2008-03-13thermal: fix generic thermal I/F for hwmonZhang, Rui2-26/+144
Signed-off-by: Zhang Rui <rui.zhang@intel.com> Signed-off-by: Len Brown <len.brown@intel.com>
2008-02-16thermal: use ERR_PTR for returning errorThomas Sujith1-13/+13
Need to return using ERR_PTR instead of NULL in case of errors. Signed-off-by: Thomas Sujith <sujith.thomas@intel.com> Signed-off-by: Len Brown <len.brown@intel.com>
2008-02-16thermal: validate input parametersThomas Sujith1-1/+12
Added sanity check to make sure that thermal zone and cooling device exists. Signed-off-by: Thomas Sujith <sujith.thomas@intel.com> Signed-off-by: Len Brown <len.brown@intel.com>
2008-02-08ACPI: thermal: syntax, spelling, kernel-docLen Brown2-23/+30
Reviewed-by: Randy Dunlap <randy.dunlap@oracle.com> Signed-off-by: Len Brown <len.brown@intel.com>
2008-02-02the generic thermal sysfs driverZhang Rui3-0/+734
The Generic Thermal sysfs driver for thermal management. Signed-off-by: Zhang Rui <rui.zhang@intel.com> Signed-off-by: Thomas Sujith <sujith.thomas@intel.com> Signed-off-by: Len Brown <len.brown@intel.com>
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