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hwmon/it87: Add PWM base frequency control

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Let the user select the base PWM frequency when using the it87
hardware monitoring driver. Different frequencies can give better
control on some fans.

Also update the documentation to mention the PWM frequency control
files, with misc cleanups to the PWM section.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
This commit is contained in:
Jean Delvare
2007-02-14 21:15:02 +01:00
committed by Jean Delvare
parent ac98695d6c
commit f8d0c19a93
3 changed files with 74 additions and 7 deletions
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15
Documentation/hwmon/sysfs-interface
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@@ -166,16 +166,21 @@ pwm[1-*] Pulse width modulation fan control.
pwm[1-*]_enable
Switch PWM on and off.
Not always present even if fan*_pwm is.
Not always present even if pwmN is.
0: turn off
1: turn on in manual mode
2+: turn on in automatic mode
Check individual chip documentation files for automatic mode details.
Check individual chip documentation files for automatic mode
details.
RW
pwm[1-*]_mode
0: DC mode
1: PWM mode
pwm[1-*]_mode 0: DC mode (direct current)
1: PWM mode (pulse-width modulation)
RW
pwm[1-*]_freq Base PWM frequency in Hz.
Only possibly available when pwmN_mode is PWM, but not always
present even then.
RW
pwm[1-*]_auto_channels_temp