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authorNémeth Márton <nm127@freemail.hu>2008-03-09 20:54:37 +0000
committerRichard Purdie <rpurdie@rpsys.net>2008-04-24 23:34:18 +0100
commit0013b23d66a2768f5babbb0ea9f03ab067a990d8 (patch)
tree14d60a50bb68e422767a268cd737f70ef4e6e19d /drivers/leds/ledtrig-timer.c
parentb3ba31f84ea041c0945b5904d4c407ce14b2b72c (diff)
leds: disable triggers on brightness set
Disable any active triggers when the brightness attribute is set to zero. Signed-off-by: Henrique de Moraes Holschuh <hmh@hmh.eng.br> Signed-off-by: Márton Németh <nm127@freemail.hu> Signed-off-by: Richard Purdie <rpurdie@rpsys.net>
Diffstat (limited to 'drivers/leds/ledtrig-timer.c')
-rw-r--r--drivers/leds/ledtrig-timer.c23
1 files changed, 19 insertions, 4 deletions
diff --git a/drivers/leds/ledtrig-timer.c b/drivers/leds/ledtrig-timer.c
index 82c55d6e4902..706297765d93 100644
--- a/drivers/leds/ledtrig-timer.c
+++ b/drivers/leds/ledtrig-timer.c
@@ -25,6 +25,9 @@
#include "leds.h"
struct timer_trig_data {
+ int brightness_on; /* LED brightness during "on" period.
+ * (LED_OFF < brightness_on <= LED_FULL)
+ */
unsigned long delay_on; /* milliseconds on */
unsigned long delay_off; /* milliseconds off */
struct timer_list timer;
@@ -34,17 +37,26 @@ static void led_timer_function(unsigned long data)
{
struct led_classdev *led_cdev = (struct led_classdev *) data;
struct timer_trig_data *timer_data = led_cdev->trigger_data;
- unsigned long brightness = LED_OFF;
- unsigned long delay = timer_data->delay_off;
+ unsigned long brightness;
+ unsigned long delay;
if (!timer_data->delay_on || !timer_data->delay_off) {
led_set_brightness(led_cdev, LED_OFF);
return;
}
- if (!led_cdev->brightness) {
- brightness = LED_FULL;
+ brightness = led_get_brightness(led_cdev);
+ if (!brightness) {
+ /* Time to switch the LED on. */
+ brightness = timer_data->brightness_on;
delay = timer_data->delay_on;
+ } else {
+ /* Store the current brightness value to be able
+ * to restore it when the delay_off period is over.
+ */
+ timer_data->brightness_on = brightness;
+ brightness = LED_OFF;
+ delay = timer_data->delay_off;
}
led_set_brightness(led_cdev, brightness);
@@ -156,6 +168,9 @@ static void timer_trig_activate(struct led_classdev *led_cdev)
if (!timer_data)
return;
+ timer_data->brightness_on = led_get_brightness(led_cdev);
+ if (timer_data->brightness_on == LED_OFF)
+ timer_data->brightness_on = LED_FULL;
led_cdev->trigger_data = timer_data;
init_timer(&timer_data->timer);