From mboxrd@z Thu Jan 1 00:00:00 1970 From: Frans Pop Subject: [PATCH 2/3] acpi: thermal/sysfs-api.txt: document passive attribute for thermal zones Date: Fri, 21 Aug 2009 10:59:35 +0200 Message-ID: <200908211059.36774.elendil@planet.nl> References: <200908211055.20569.elendil@planet.nl> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Return-path: Received: from cpsmtpm-eml110.kpnxchange.com ([195.121.3.14]:60146 "EHLO CPSMTPM-EML110.kpnxchange.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754366AbZHUI7f (ORCPT ); Fri, 21 Aug 2009 04:59:35 -0400 In-Reply-To: <200908211055.20569.elendil@planet.nl> Content-Disposition: inline Sender: linux-acpi-owner@vger.kernel.org List-Id: linux-acpi@vger.kernel.org To: linux-acpi@vger.kernel.org Cc: Sujith Thomas , Zhang Rui , linux-kernel@vger.kernel.org Signed-off-by: Frans Pop Cc: Zhang Rui Cc: Sujith Thomas diff --git a/Documentation/thermal/sysfs-api.txt b/Documentation/thermal/sysfs-api.txt index 48e9c5c..52b63c4 100644 --- a/Documentation/thermal/sysfs-api.txt +++ b/Documentation/thermal/sysfs-api.txt @@ -3,7 +3,7 @@ Generic Thermal Sysfs driver How To Written by Sujith Thomas , Zhang Rui -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: