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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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3
drivers/leds/ledtrig-ide-disk.c
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@@ -37,7 +37,8 @@ static void ledtrig_ide_timerfunc(unsigned long data)
{
if (ide_lastactivity != ide_activity) {
ide_lastactivity = ide_activity;
led_trigger_event(ledtrig_ide, LED_FULL);
/* INT_MAX will set each LED to its maximum brightness */
led_trigger_event(ledtrig_ide, INT_MAX);
mod_timer(&ledtrig_ide_timer, jiffies + msecs_to_jiffies(10));
} else {
led_trigger_event(ledtrig_ide, LED_OFF);