@@ -3,7 +3,7 @@ Generic Thermal Sysfs driver How To
Written by Sujith Thomas <sujith.thomas@intel.com>, Zhang Rui <rui.zhang@intel.com>
-Updated: 2 January 2008
+Updated: 21 August 2009
Copyright (c) 2008 Intel Corporation
@@ -199,6 +199,16 @@ cdev[0-*]_trip_point
point.
RO, Optional
+passive
+ Attribute is only present for zones which do not have a passive
+ cooling policy (_PSV) defined in ACPI. Default is zero and can be
+ set to a temperature (in millidegrees) to enable a passive trip
+ point for the zone. Activation is done by polling (default interval:
+ 10 seconds); the polling interval can be set in
+ /proc/acpi/thermal/TZN/polling_frequency.
+ Unit: millidegree Celsius
+ RW, Optional
+
*****************************
* Cooling device attributes *
*****************************
@@ -230,8 +240,9 @@ thermal_zone_device (thermal_zone1) with 4 trip points in all.
It has one processor and one fan, which are both registered as
thermal_cooling_device.
-If the processor is listed in _PSL method, and the fan is listed in _AL0
-method, the sys I/F structure will be built like this:
+If the processor is listed in _PSL method, the fan is listed in _AL0
+method, and the zone has a _PSV method, the sys I/F structure will be
+built like this:
/sys/class/thermal:
Signed-off-by: Frans Pop <elendil@planet.nl> Cc: Zhang Rui <rui.zhang@intel.com> Cc: Sujith Thomas <sujith.thomas@intel.com> -- To unsubscribe from this list: send the line "unsubscribe linux-acpi" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html