1 files changed, 130 insertions, 0 deletions

diff --git a/drivers/leds/trigger/ledtrig-timer.c b/drivers/leds/trigger/ledtrig-timer.c
new file mode 100644
index 000000000000..8d09327b5719
--- /dev/null
+++ b/drivers/leds/trigger/ledtrig-timer.c
@@ -0,0 +1,130 @@
+/*
+ * LED Kernel Timer Trigger
+ *
+ * Copyright 2005-2006 Openedhand Ltd.
+ *
+ * Author: Richard Purdie <rpurdie@openedhand.com>
+ *
+ * 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/device.h>
+#include <linux/ctype.h>
+#include <linux/leds.h>
+
+static ssize_t led_delay_on_show(struct device *dev,
+                struct device_attribute *attr, char *buf)
+{
+        struct led_classdev *led_cdev = dev_get_drvdata(dev);
+
+        return sprintf(buf, "%lu\n", led_cdev->blink_delay_on);
+}
+
+static ssize_t led_delay_on_store(struct device *dev,
+                struct device_attribute *attr, const char *buf, size_t size)
+{
+        struct led_classdev *led_cdev = dev_get_drvdata(dev);
+        unsigned long state;
+        ssize_t ret = -EINVAL;
+
+        ret = kstrtoul(buf, 10, &state);
+        if (ret)
+                return ret;
+
+        led_blink_set(led_cdev, &state, &led_cdev->blink_delay_off);
+        led_cdev->blink_delay_on = state;
+
+        return size;
+}
+
+static ssize_t led_delay_off_show(struct device *dev,
+                struct device_attribute *attr, char *buf)
+{
+        struct led_classdev *led_cdev = dev_get_drvdata(dev);
+
+        return sprintf(buf, "%lu\n", led_cdev->blink_delay_off);
+}
+
+static ssize_t led_delay_off_store(struct device *dev,
+                struct device_attribute *attr, const char *buf, size_t size)
+{
+        struct led_classdev *led_cdev = dev_get_drvdata(dev);
+        unsigned long state;
+        ssize_t ret = -EINVAL;
+
+        ret = kstrtoul(buf, 10, &state);
+        if (ret)
+                return ret;
+
+        led_blink_set(led_cdev, &led_cdev->blink_delay_on, &state);
+        led_cdev->blink_delay_off = state;
+
+        return size;
+}
+
+static DEVICE_ATTR(delay_on, 0644, led_delay_on_show, led_delay_on_store);
+static DEVICE_ATTR(delay_off, 0644, led_delay_off_show, led_delay_off_store);
+
+static void timer_trig_activate(struct led_classdev *led_cdev)
+{
+        int rc;
+
+        led_cdev->trigger_data = NULL;
+
+        rc = device_create_file(led_cdev->dev, &dev_attr_delay_on);
+        if (rc)
+                return;
+        rc = device_create_file(led_cdev->dev, &dev_attr_delay_off);
+        if (rc)
+                goto err_out_delayon;
+
+        led_blink_set(led_cdev, &led_cdev->blink_delay_on,
+                      &led_cdev->blink_delay_off);
+        led_cdev->activated = true;
+
+        return;
+
+err_out_delayon:
+        device_remove_file(led_cdev->dev, &dev_attr_delay_on);
+}
+
+static void timer_trig_deactivate(struct led_classdev *led_cdev)
+{
+        if (led_cdev->activated) {
+                device_remove_file(led_cdev->dev, &dev_attr_delay_on);
+                device_remove_file(led_cdev->dev, &dev_attr_delay_off);
+                led_cdev->activated = false;
+        }
+
+        /* Stop blinking */
+        led_set_brightness(led_cdev, LED_OFF);
+}
+
+static struct led_trigger timer_led_trigger = {
+        .name     = "timer",
+        .activate = timer_trig_activate,
+        .deactivate = timer_trig_deactivate,
+};
+
+static int __init timer_trig_init(void)
+{
+        return led_trigger_register(&timer_led_trigger);
+}
+
+static void __exit timer_trig_exit(void)
+{
+        led_trigger_unregister(&timer_led_trigger);
+}
+
+module_init(timer_trig_init);
+module_exit(timer_trig_exit);
+
+MODULE_AUTHOR("Richard Purdie <rpurdie@openedhand.com>");
+MODULE_DESCRIPTION("Timer LED trigger");
+MODULE_LICENSE("GPL");