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leds: allow led-drivers to use a variable range of brightness values

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This patch allows drivers to override the default maximum brightness value
of 255.  We take care to preserve backwards-compatibility as much as
possible, so that user-space ABI doesn't change for existing drivers.
LED trigger code has also been updated to use the per-LED maximum.

Signed-off-by: Guennadi Liakhovetski <lg@denx.de>
Signed-off-by: Richard Purdie <rpurdie@linux.intel.com>
This commit is contained in:
Guennadi Liakhovetski 2009-01-10 18:54:39 +00:00 • committed by Richard Purdie
parent a7d878af94
commit 1bd465e6b0
7 changed files with 29 additions and 8 deletions
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1
include/linux/leds.h
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@ -30,6 +30,7 @@ enum led_brightness {
struct led_classdev {
const char *name;
int brightness;
int max_brightness;
int flags;
/* Lower 16 bits reflect status */