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hwmon: (nct6775) Add support for pwm, pwm_mode, and pwm_enable

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Signed-off-by: Guenter Roeck <[email protected]>
This commit is contained in:
Guenter Roeck 2012-12-04 08:30:54 -08:00
commit 77eb5b3703
2 changed files with 347 additions and 0 deletions
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18
Documentation/hwmon/nct6775
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@ -69,6 +69,24 @@ is driven slower/faster to reach the predefined range again.
The mode works for fan1-fan5.
sysfs attributes
----------------
pwm[1-5] - this file stores PWM duty cycle or DC value (fan speed) in range:
0 (lowest speed) to 255 (full)
pwm[1-5]_enable - this file controls mode of fan/temperature control:
* 0 Fan control disabled (fans set to maximum speed)
* 1 Manual mode, write to pwm[0-5] any value 0-255
* 2 "Thermal Cruise" mode
* 3 "Fan Speed Cruise" mode
* 4 "Smart Fan III" mode (NCT6775F only)
* 5 "Smart Fan IV" mode
pwm[1-5]_mode - controls if output is PWM or DC level
* 0 DC output
* 1 PWM output
Usage Notes
-----------