linux-kernel - [RFC PATCH 1/2] LEDs: Add ability to blink via simple trigger

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Date:	Fri,  7 Jan 2011 18:28:16 +0200
From:	Vasily Khoruzhick <anarsoul@...il.com>
To:	linux-kernel@...r.kernel.org, Richard Purdie <rpurdie@...ys.net>,
	Anton Vorontsov <cbouatmailru@...il.com>,
	"Arnaud Patard (Rtp)" <arnaud.patard@...-net.org>,
	anarsoul@...il.com
Subject: [RFC PATCH 1/2] LEDs: Add ability to blink via simple trigger

As blink API is now available, it's possible to add
ability to blink via simple trigger.

Signed-off-by: Vasily Khoruzhick <anarsoul@...il.com>
---
 drivers/leds/led-triggers.c |   20 ++++++++++++++++++++
 include/linux/leds.h        |    3 +++
 2 files changed, 23 insertions(+), 0 deletions(-)

diff --git a/drivers/leds/led-triggers.c b/drivers/leds/led-triggers.c
index c41eb61..45f92ec 100644
--- a/drivers/leds/led-triggers.c
+++ b/drivers/leds/led-triggers.c
@@ -231,6 +231,26 @@ void led_trigger_event(struct led_trigger *trigger,
 }
 EXPORT_SYMBOL_GPL(led_trigger_event);
 
+void led_trigger_blink(struct led_trigger *trigger,
+			unsigned long *delay_on,
+			unsigned long *delay_off)
+{
+	struct list_head *entry;
+
+	if (!trigger)
+		return;
+
+	read_lock(&trigger->leddev_list_lock);
+	list_for_each(entry, &trigger->led_cdevs) {
+		struct led_classdev *led_cdev;
+
+		led_cdev = list_entry(entry, struct led_classdev, trig_list);
+		led_blink_set(led_cdev, delay_on, delay_off);
+	}
+	read_unlock(&trigger->leddev_list_lock);
+}
+EXPORT_SYMBOL_GPL(led_trigger_blink);
+
 void led_trigger_register_simple(const char *name, struct led_trigger **tp)
 {
 	struct led_trigger *trigger;
diff --git a/include/linux/leds.h b/include/linux/leds.h
index 0f19df9..a1591e8 100644
--- a/include/linux/leds.h
+++ b/include/linux/leds.h
@@ -145,6 +145,9 @@ extern void led_trigger_register_simple(const char *name,
 extern void led_trigger_unregister_simple(struct led_trigger *trigger);
 extern void led_trigger_event(struct led_trigger *trigger,
 				enum led_brightness event);
+extern void led_trigger_blink(struct led_trigger *trigger,
+			unsigned long *delay_on,
+			unsigned long *delay_off);
 
 #else
 
-- 
1.7.3.2

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