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hwmon: w83627ehf updates

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Add control of fan minimum turn-on output levels, decoupling it from the
fan turn-off output level.  Add control of rate of change of fan output
level.  These in turn allow lower turn-off rotor speed and smoother
transitions for better thermal and acoustic control authority.  Add
support for constant fan speed and proportional-response operations modes.

[[email protected]: coding-style fixes]
Signed-off-by: Daniel J Blueman <[email protected]>
Cc: Jean Delvare <[email protected]>
Cc: David Hubbard <[email protected]>
Cc: Hans de Goede <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
Daniel J Blueman 2009-12-14 18:01:37 -08:00 • committed by Linus Torvalds
commit 41e9a06236
2 changed files with 61 additions and 21 deletions
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10
Documentation/hwmon/w83627ehf
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@ -81,8 +81,14 @@ pwm[1-4] - this file stores PWM duty cycle or DC value (fan speed) in range:
0 (stop) to 255 (full)
pwm[1-4]_enable - this file controls mode of fan/temperature control:
* 1 Manual Mode, write to pwm file any value 0-255 (full speed)
* 2 Thermal Cruise
* 1 Manual mode, write to pwm file any value 0-255 (full speed)
* 2 "Thermal Cruise" mode
* 3 "Fan Speed Cruise" mode
* 4 "Smart Fan III" mode
pwm[1-4]_mode - controls if output is PWM or DC level
* 0 DC output (0 - 12v)
* 1 PWM output
Thermal Cruise mode
-------------------