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| author | Németh Márton <nm127@freemail.hu> | 2008-03-09 20:54:37 +0000 |
|---|---|---|
| committer | Richard Purdie <rpurdie@rpsys.net> | 2008-04-24 23:34:18 +0100 |
| commit | 0013b23d66a2768f5babbb0ea9f03ab067a990d8 (patch) | |
| tree | 14d60a50bb68e422767a268cd737f70ef4e6e19d /drivers/leds/ledtrig-timer.c | |
| parent | b3ba31f84ea041c0945b5904d4c407ce14b2b72c (diff) | |
| download | kernel-crypto-0013b23d66a2768f5babbb0ea9f03ab067a990d8.tar.gz kernel-crypto-0013b23d66a2768f5babbb0ea9f03ab067a990d8.tar.xz kernel-crypto-0013b23d66a2768f5babbb0ea9f03ab067a990d8.zip | |
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.c | 23 |
1 files changed, 19 insertions, 4 deletions
diff --git a/drivers/leds/ledtrig-timer.c b/drivers/leds/ledtrig-timer.c index 82c55d6e490..706297765d9 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); |