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authorNick Forbes <Nick.Forbes@huntsworth.com>2008-04-25 03:06:52 +0400
committerRichard Purdie <rpurdie@rpsys.net>2008-04-25 03:06:52 +0400
commit060856c799191ffc360105cac49f3f9e68d526b7 (patch)
tree191f593264e0712b1be086c3e49faa9b2c782e9a /drivers/leds
parent2e214e0fa21465cf2749ca7d5a072cf8591f3213 (diff)
downloadlinux-060856c799191ffc360105cac49f3f9e68d526b7.tar.xz
leds: Add default-on trigger
Add a trigger which allows LEDs to default to the full brightness state. Signed-off-by: Nick Forbes <Nick.Forbes@huntsworth.com> Signed-off-by: Richard Purdie <rpurdie@rpsys.net>
Diffstat (limited to 'drivers/leds')
-rw-r--r--drivers/leds/Kconfig7
-rw-r--r--drivers/leds/Makefile1
-rw-r--r--drivers/leds/ledtrig-default-on.c45
3 files changed, 53 insertions, 0 deletions
diff --git a/drivers/leds/Kconfig b/drivers/leds/Kconfig
index 2d5ea8a05338..86a369bc57d6 100644
--- a/drivers/leds/Kconfig
+++ b/drivers/leds/Kconfig
@@ -183,4 +183,11 @@ config LEDS_TRIGGER_HEARTBEAT
load average.
If unsure, say Y.
+config LEDS_TRIGGER_DEFAULT_ON
+ tristate "LED Default ON Trigger"
+ depends on LEDS_TRIGGERS
+ help
+ This allows LEDs to be initialised in the ON state.
+ If unsure, say Y.
+
endif # NEW_LEDS
diff --git a/drivers/leds/Makefile b/drivers/leds/Makefile
index 9adfa2fe37d4..973d626f5f4a 100644
--- a/drivers/leds/Makefile
+++ b/drivers/leds/Makefile
@@ -26,3 +26,4 @@ obj-$(CONFIG_LEDS_FSG) += leds-fsg.o
obj-$(CONFIG_LEDS_TRIGGER_TIMER) += ledtrig-timer.o
obj-$(CONFIG_LEDS_TRIGGER_IDE_DISK) += ledtrig-ide-disk.o
obj-$(CONFIG_LEDS_TRIGGER_HEARTBEAT) += ledtrig-heartbeat.o
+obj-$(CONFIG_LEDS_TRIGGER_DEFAULT_ON) += ledtrig-default-on.o
diff --git a/drivers/leds/ledtrig-default-on.c b/drivers/leds/ledtrig-default-on.c
new file mode 100644
index 000000000000..92995e40cfa4
--- /dev/null
+++ b/drivers/leds/ledtrig-default-on.c
@@ -0,0 +1,45 @@
+/*
+ * LED Kernel Default ON Trigger
+ *
+ * Copyright 2008 Nick Forbes <nick.forbes@incepta.com>
+ *
+ * Based on Richard Purdie's ledtrig-timer.c.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/leds.h>
+#include "leds.h"
+
+static void defon_trig_activate(struct led_classdev *led_cdev)
+{
+ led_set_brightness(led_cdev, LED_FULL);
+}
+
+static struct led_trigger defon_led_trigger = {
+ .name = "default-on",
+ .activate = defon_trig_activate,
+};
+
+static int __init defon_trig_init(void)
+{
+ return led_trigger_register(&defon_led_trigger);
+}
+
+static void __exit defon_trig_exit(void)
+{
+ led_trigger_unregister(&defon_led_trigger);
+}
+
+module_init(defon_trig_init);
+module_exit(defon_trig_exit);
+
+MODULE_AUTHOR("Nick Forbes <nick.forbes@incepta.com>");
+MODULE_DESCRIPTION("Default-ON LED trigger");
+MODULE_LICENSE("GPL");