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authorEsben Haabendal <eha@doredevelopment.dk>2011-05-25 04:13:22 +0400
committerLinus Torvalds <torvalds@linux-foundation.org>2011-05-25 19:39:49 +0400
commitfff26f8141145e01eae8f4d6e642ac8a0d500158 (patch)
tree4da2d503bbb242118fdde980e045779846864a14 /drivers/leds/leds.h
parent5ff77428e55c152ef75a6967f3266db79926fbde (diff)
downloadlinux-fff26f8141145e01eae8f4d6e642ac8a0d500158.tar.xz
leds: support automatic start of blinking with ledtrig-timer
By setting initial values blink_delay_on and blink_delay_off in a led_classdev struct, this change starts the blinking when the led is initialized. With this patch, you can initialize blink_delay_on and blink_delay_off in led_classdev with default_trigger set to "timer", and the led will start up blinking. The current ledtrig-timer implementation ignores any initial blink_delay_on/blink_delay_off settings, and requires setting blink_delay_on/blink_delay_off (typically from userspace) before the led blinks. Signed-off-by: Esben Haabendal <eha@doredevelopment.dk> Cc: Richard Purdie <rpurdie@rpsys.net> Cc: Randy Dunlap <rdunlap@xenotime.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/leds/leds.h')
-rw-r--r--drivers/leds/leds.h7
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/leds/leds.h b/drivers/leds/leds.h
index 2dd8ecbfdc31..e77c7f8dcdd4 100644
--- a/drivers/leds/leds.h
+++ b/drivers/leds/leds.h
@@ -40,10 +40,17 @@ void led_trigger_set_default(struct led_classdev *led_cdev);
void led_trigger_set(struct led_classdev *led_cdev,
struct led_trigger *trigger);
void led_trigger_remove(struct led_classdev *led_cdev);
+
+static inline void *led_get_trigger_data(struct led_classdev *led_cdev)
+{
+ return led_cdev->trigger_data;
+}
+
#else
#define led_trigger_set_default(x) do {} while (0)
#define led_trigger_set(x, y) do {} while (0)
#define led_trigger_remove(x) do {} while (0)
+#define led_get_trigger_data(x) (NULL)
#endif
ssize_t led_trigger_store(struct device *dev, struct device_attribute *attr,