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authorEduardo Valentin <edubezval@gmail.com>2016-11-07 21:09:15 -0800
committerZhang Rui <rui.zhang@intel.com>2016-11-23 10:06:12 +0800
commit8772e185f191bf1280445dfe6b4f9c59e725c473 (patch)
tree5df291a2c44f4055a69c89742372004845739883 /drivers/thermal/thermal_core.c
parent106339ab7e98da3e51c109926af6f394dcc06812 (diff)
thermal: core: add a comment describing the main update loop
Simply marking the main update loop section and adding a comment describing it. Cc: Zhang Rui <rui.zhang@intel.com> Cc: linux-pm@vger.kernel.org Cc: linux-kernel@vger.kernel.org Signed-off-by: Eduardo Valentin <edubezval@gmail.com> Signed-off-by: Zhang Rui <rui.zhang@intel.com>
Diffstat (limited to 'drivers/thermal/thermal_core.c')
-rw-r--r--drivers/thermal/thermal_core.c11
1 files changed, 11 insertions, 0 deletions
diff --git a/drivers/thermal/thermal_core.c b/drivers/thermal/thermal_core.c
index 884235f216bd..bf108db6ae5d 100644
--- a/drivers/thermal/thermal_core.c
+++ b/drivers/thermal/thermal_core.c
@@ -286,6 +286,17 @@ static void thermal_unregister_governors(void)
thermal_gov_power_allocator_unregister();
}
+/*
+ * Zone update section: main control loop applied to each zone while monitoring
+ *
+ * in polling mode. The monitoring is done using a workqueue.
+ * Same update may be done on a zone by calling thermal_zone_device_update().
+ *
+ * An update means:
+ * - Non-critical trips will invoke the governor responsible for that zone;
+ * - Hot trips will produce a notification to userspace;
+ * - Critical trip point will cause a system shutdown.
+ */
static void thermal_zone_device_set_polling(struct thermal_zone_device *tz,
int delay)
{