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authorGuenter Roeck <linux@roeck-us.net>2012-12-04 09:08:29 -0800
committerGuenter Roeck <linux@roeck-us.net>2013-04-07 21:16:39 -0700
commitbbd8decd4123648ddeba2be485bc7e1a3117bfe4 (patch)
treea39d3b3d8a787862b632d8c9ec0545c49a84747c /Documentation/hwmon/nct6775
parentcdcaeceb74ff3686eb25de6812870fbc765c3c39 (diff)
downloadlinux-bbd8decd4123648ddeba2be485bc7e1a3117bfe4.tar.bz2
hwmon: (nct6775) Add support for weighted fan control
The NCT677X series support weighted fan control. In this mode, a secondary temperature source is used in addition to the primary temperature source to control fan speed. Add support for this feature. Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Diffstat (limited to 'Documentation/hwmon/nct6775')
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1 files changed, 19 insertions, 0 deletions
diff --git a/Documentation/hwmon/nct6775 b/Documentation/hwmon/nct6775
index b4fe6bc4d371..3f5587e39093 100644
--- a/Documentation/hwmon/nct6775
+++ b/Documentation/hwmon/nct6775
@@ -92,6 +92,25 @@ Common fan control attributes
pwm[1-5]_temp_sel Temperature source. Value is temperature sensor index.
For example, select '1' for temp1_input.
+pwm[1-5]_weight_temp_sel
+ Secondary temperature source. Value is temperature
+ sensor index. For example, select '1' for temp1_input.
+ Set to 0 to disable secondary temperature control.
+
+If secondary temperature functionality is enabled, it is controlled with the
+following attributes.
+
+pwm[1-5]_weight_duty_step
+ Duty step size.
+pwm[1-5]_weight_temp_step
+ Temperature step size. With each step over
+ temp_step_base, the value of weight_duty_step is added
+ to the current pwm value.
+pwm[1-5]_weight_temp_step_base
+ Temperature at which secondary temperature control kicks
+ in.
+pwm[1-5]_weight_temp_step_tol
+ Temperature step tolerance.
Thermal Cruise mode (2)
-----------------------