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authorJean Delvare <khali@linux-fr.org>2010-03-05 22:17:21 +0100
committerJean Delvare <khali@linux-fr.org>2010-03-05 22:17:21 +0100
commitcccfc9c4bb3c7888f8249b36e08d6e115238c613 (patch)
treeacff09833d8e7fd1b87efb27394860ea398dcaa9 /Documentation
parent4f3f51bc21d434f8d91a79438a1957ec0baa9e30 (diff)
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hwmon: (it87) Validate auto pwm settings
Before switching to automatic fan control mode, make sure that all the trip points make sense. Otherwise, the control loop could lead to weird fan behavior. Signed-off-by: Jean Delvare <khali@linux-fr.org>
Diffstat (limited to 'Documentation')
-rw-r--r--Documentation/hwmon/it874
1 files changed, 4 insertions, 0 deletions
diff --git a/Documentation/hwmon/it87 b/Documentation/hwmon/it87
index 0083bd317351..8d08bf0d38ed 100644
--- a/Documentation/hwmon/it87
+++ b/Documentation/hwmon/it87
@@ -177,3 +177,7 @@ between trip point N and trip point N+1 then the PWM output value is
the one of trip point N. The automatic control mode is less flexible
than the manual control mode, but it reacts faster, is more robust and
doesn't use CPU cycles.
+
+Trip points must be set properly before switching to automatic fan speed
+control mode. The driver will perform basic integrity checks before
+actually switching to automatic control mode.