cleanup LED documentation and make it match reality

sysfs-class-led fails to mention some important details. Also fix led
vs LED and english.

Signed-off-by: Pavel Machek <pavel@ucw.cz>
Signed-off-by: Jacek Anaszewski <j.anaszewski@samsung.com>

1 files changed, 11 insertions, 3 deletions

diff --git a/Documentation/ABI/testing/sysfs-class-led b/Documentation/ABI/testing/sysfs-class-led
index 86ace287d48b..491cdeedc195 100644
--- a/Documentation/ABI/testing/sysfs-class-led
+++ b/Documentation/ABI/testing/sysfs-class-led
@@ -4,16 +4,24 @@ KernelVersion:	2.6.17
 Contact:        Richard Purdie <rpurdie@rpsys.net>
 Description:
                 Set the brightness of the LED. Most LEDs don't
-                have hardware brightness support so will just be turned on for
+                have hardware brightness support, so will just be turned on for
                 non-zero brightness settings. The value is between 0 and
                 /sys/class/leds/<led>/max_brightness.
 
+                Writing 0 to this file clears active trigger.
+
+                Writing non-zero to this file while trigger is active changes the
+                top brightness trigger is going to use.
+
 What:           /sys/class/leds/<led>/max_brightness
 Date:           March 2006
 KernelVersion:  2.6.17
 Contact:        Richard Purdie <rpurdie@rpsys.net>
 Description:
-                Maximum brightness level for this led, default is 255 (LED_FULL).
+                Maximum brightness level for this LED, default is 255 (LED_FULL).
+
+                If the LED does not support different brightness levels, this
+                should be 1.
 
 What:           /sys/class/leds/<led>/trigger
 Date:           March 2006
@@ -21,7 +29,7 @@ KernelVersion:	2.6.17
 Contact:        Richard Purdie <rpurdie@rpsys.net>
 Description:
                 Set the trigger for this LED. A trigger is a kernel based source
-                of led events.
+                of LED events.
                 You can change triggers in a similar manner to the way an IO
                 scheduler is chosen. Trigger specific parameters can appear in
                 /sys/class/leds/<led> once a given trigger is selected. For