lk/linux-kernel-test
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

leds: disable triggers on brightness set

Browse Source 
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>
This commit is contained in:
Németh Márton
2008-03-09 20:54:37 +00:00
committed by Richard Purdie
parent b3ba31f84e
commit 0013b23d66
5 changed files with 47 additions and 10 deletions
Download Patch File Download Diff File Expand all files Collapse all files

23
drivers/leds/ledtrig-timer.c
View File

@ -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);