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hwmon: (w83792d) Additional PWM outputs support

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Add pwm[4-7] and the associated pwm[4-7]_mode attributes.

Signed-off-by: Roger Lucas <[email protected]>
Signed-off-by: Jean Delvare <[email protected]>
This commit is contained in:
Roger Lucas 2015-05-12 22:01:37 +01:00 • committed by Jean Delvare
commit f617f7310c
2 changed files with 35 additions and 10 deletions
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18
Documentation/hwmon/w83792d
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@ -8,6 +8,7 @@ Supported chips:
Datasheet: http://www.winbond.com.tw
Author: Shane Huang (Winbond)
Updated: Roger Lucas
Module Parameters
@ -38,9 +39,16 @@ parameter; this will put it into a more well-behaved state first.
The driver implements three temperature sensors, seven fan rotation speed
sensors, nine voltage sensors, and two automatic fan regulation
strategies called: Smart Fan I (Thermal Cruise mode) and Smart Fan II.
Automatic fan control mode is possible only for fan1-fan3. Fan4-fan7 can run
synchronized with selected fan (fan1-fan3). This functionality and manual PWM
control for fan4-fan7 is not yet implemented.
The driver also implements up to seven fan control outputs: pwm1-7. Pwm1-7
can be configured to PWM output or Analogue DC output via their associated
pwmX_mode. Outputs pwm4 through pwm7 may or may not be present depending on
how the W83792AD/D was configured by the BIOS.
Automatic fan control mode is possible only for fan1-fan3.
For all pwmX outputs, a value of 0 means minimum fan speed and a value of
255 means maximum fan speed.
Temperatures are measured in degrees Celsius and measurement resolution is 1
degC for temp1 and 0.5 degC for temp2 and temp3. An alarm is triggered when
@ -157,14 +165,14 @@ for each fan.
/sys files
----------
pwm[1-3] - this file stores PWM duty cycle or DC value (fan speed) in range:
pwm[1-7] - this file stores PWM duty cycle or DC value (fan speed) in range:
0 (stop) to 255 (full)
pwm[1-3]_enable - this file controls mode of fan/temperature control:
* 0 Disabled
* 1 Manual mode
* 2 Smart Fan II
* 3 Thermal Cruise
pwm[1-3]_mode - Select PWM of DC mode
pwm[1-7]_mode - Select PWM or DC mode
* 0 DC
* 1 PWM
thermal_cruise[1-3] - Selects the desired temperature for cruise (degC)