hwmon: Improve the pwmN_enable documentation

The documentation of the pwmN_enable interface file is not very clear,
and has been confusing several driver authors already. Make it clearer.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Mark M. Hoffman <mhoffman@lightlink.com>

1 files changed, 4 insertions, 5 deletions

diff --git a/Documentation/hwmon/sysfs-interface b/Documentation/hwmon/sysfs-interface
index d131a56e52f8..b3a9e1b9dbda 100644
--- a/Documentation/hwmon/sysfs-interface
+++ b/Documentation/hwmon/sysfs-interface
@@ -172,11 +172,10 @@ pwm[1-*]	Pulse width modulation fan control.
                 255 is max or 100%.
 
 pwm[1-*]_enable
-                Switch PWM on and off.
-                Not always present even if pwmN is.
-                0: turn off
-                1: turn on in manual mode
-                2+: turn on in automatic mode
+                Fan speed control method:
+                0: no fan speed control (i.e. fan at full speed)
+                1: manual fan speed control enabled (using pwm[1-*])
+                2+: automatic fan speed control enabled
                 Check individual chip documentation files for automatic mode
                 details.
                 RW