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| author | Roger Lucas <vt8231@hiddenengine.co.uk> | 2015-05-12 22:01:37 +0100 |
|---|---|---|
| committer | Jean Delvare <jdelvare@suse.de> | 2015-07-03 14:39:05 +0200 |
| commit | f617f7310cfdca5245a10629979d85682323f1a4 (patch) | |
| tree | 1eaaffb7cc024f7ad86e98cd54489b54dfe6702e /Documentation/hwmon | |
| parent | 9bdc771f2c29a11920f477fba05a58e23ee42554 (diff) | |
| download | linux-rpi-f617f7310cfdca5245a10629979d85682323f1a4.tar.gz linux-rpi-f617f7310cfdca5245a10629979d85682323f1a4.tar.bz2 linux-rpi-f617f7310cfdca5245a10629979d85682323f1a4.zip | |
hwmon: (w83792d) Additional PWM outputs support
Add pwm[4-7] and the associated pwm[4-7]_mode attributes.
Signed-off-by: Roger Lucas <vt8231@hiddenengine.co.uk>
Signed-off-by: Jean Delvare <jdelvare@suse.de>
Diffstat (limited to 'Documentation/hwmon')
| -rw-r--r-- | Documentation/hwmon/w83792d | 18 |
1 files changed, 13 insertions, 5 deletions
diff --git a/Documentation/hwmon/w83792d b/Documentation/hwmon/w83792d index 53f7b6866fec..f2ffc402ea45 100644 --- a/Documentation/hwmon/w83792d +++ b/Documentation/hwmon/w83792d @@ -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) |