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authorR.Durgadoss <durgadoss.r@intel.com>2010-10-27 03:33:29 +0530
committerLen Brown <len.brown@intel.com>2011-01-12 00:08:35 -0500
commit4cb18728709683c91a5f6f8d5f337bfb498b089a (patch)
tree26edef8257934247a7b5fe74ac33d54e1a0ad71b /Documentation/thermal
parente8a7e48bb248a1196484d3f8afa53bded2b24e71 (diff)
downloadlinux-linaro-stable-4cb18728709683c91a5f6f8d5f337bfb498b089a.tar.gz
thermal: Add event notification to thermal framework
This patch adds event notification support to the generic thermal sysfs framework in the kernel. The notification is in the form of a netlink event. Signed-off-by: R.Durgadoss <durgadoss.r@intel.com> Signed-off-by: Len Brown <len.brown@intel.com>
Diffstat (limited to 'Documentation/thermal')
-rw-r--r--Documentation/thermal/sysfs-api.txt12
1 files changed, 12 insertions, 0 deletions
diff --git a/Documentation/thermal/sysfs-api.txt b/Documentation/thermal/sysfs-api.txt
index cb3d15bc1aeb..b61e46f449aa 100644
--- a/Documentation/thermal/sysfs-api.txt
+++ b/Documentation/thermal/sysfs-api.txt
@@ -278,3 +278,15 @@ method, the sys I/F structure will be built like this:
|---name: acpitz
|---temp1_input: 37000
|---temp1_crit: 100000
+
+4. Event Notification
+
+The framework includes a simple notification mechanism, in the form of a
+netlink event. Netlink socket initialization is done during the _init_
+of the framework. Drivers which intend to use the notification mechanism
+just need to call generate_netlink_event() with two arguments viz
+(originator, event). Typically the originator will be an integer assigned
+to a thermal_zone_device when it registers itself with the framework. The
+event will be one of:{THERMAL_AUX0, THERMAL_AUX1, THERMAL_CRITICAL,
+THERMAL_DEV_FAULT}. Notification can be sent when the current temperature
+crosses any of the configured thresholds.