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authorJean Delvare <khali@linux-fr.org>2007-02-14 23:15:02 +0300
committerJean Delvare <khali@arrakis.delvare>2007-02-14 23:15:02 +0300
commitf8d0c19a93cea3a26a90f2462295e1e01a4cd250 (patch)
tree6d874a35f611a1c344896ef13a911a80a3d10017 /Documentation/hwmon/sysfs-interface
parentac98695d6c1508b724f246f38ce57fb4e3cec356 (diff)
downloadlinux-f8d0c19a93cea3a26a90f2462295e1e01a4cd250.tar.xz
hwmon/it87: Add PWM base frequency control
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>
Diffstat (limited to 'Documentation/hwmon/sysfs-interface')
-rw-r--r--Documentation/hwmon/sysfs-interface15
1 files changed, 10 insertions, 5 deletions
diff --git a/Documentation/hwmon/sysfs-interface b/Documentation/hwmon/sysfs-interface
index efef3b962cd3..d73d2e8c7534 100644
--- a/Documentation/hwmon/sysfs-interface
+++ b/Documentation/hwmon/sysfs-interface
@@ -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