/* * 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");