diff options
Diffstat (limited to 'drivers/leds/ledtrig-timer.c')
| -rw-r--r-- | drivers/leds/ledtrig-timer.c | 221 |
1 files changed, 0 insertions, 221 deletions
diff --git a/drivers/leds/ledtrig-timer.c b/drivers/leds/ledtrig-timer.c deleted file mode 100644 index 82c55d6e490..00000000000 --- a/drivers/leds/ledtrig-timer.c +++ /dev/null @@ -1,221 +0,0 @@ -/* - * 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/jiffies.h> -#include <linux/kernel.h> -#include <linux/init.h> -#include <linux/list.h> -#include <linux/spinlock.h> -#include <linux/device.h> -#include <linux/sysdev.h> -#include <linux/timer.h> -#include <linux/ctype.h> -#include <linux/leds.h> -#include "leds.h" - -struct timer_trig_data { - unsigned long delay_on; /* milliseconds on */ - unsigned long delay_off; /* milliseconds off */ - struct timer_list timer; -}; - -static void led_timer_function(unsigned long data) -{ - struct led_classdev *led_cdev = (struct led_classdev *) data; - struct timer_trig_data *timer_data = led_cdev->trigger_data; - unsigned long brightness = LED_OFF; - unsigned long delay = timer_data->delay_off; - - if (!timer_data->delay_on || !timer_data->delay_off) { - led_set_brightness(led_cdev, LED_OFF); - return; - } - - if (!led_cdev->brightness) { - brightness = LED_FULL; - delay = timer_data->delay_on; - } - - led_set_brightness(led_cdev, brightness); - - mod_timer(&timer_data->timer, jiffies + msecs_to_jiffies(delay)); -} - -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); - struct timer_trig_data *timer_data = led_cdev->trigger_data; - - sprintf(buf, "%lu\n", timer_data->delay_on); - - return strlen(buf) + 1; -} - -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); - struct timer_trig_data *timer_data = led_cdev->trigger_data; - int ret = -EINVAL; - char *after; - unsigned long state = simple_strtoul(buf, &after, 10); - size_t count = after - buf; - - if (*after && isspace(*after)) - count++; - - if (count == size) { - if (timer_data->delay_on != state) { - /* the new value differs from the previous */ - timer_data->delay_on = state; - - /* deactivate previous settings */ - del_timer_sync(&timer_data->timer); - - /* try to activate hardware acceleration, if any */ - if (!led_cdev->blink_set || - led_cdev->blink_set(led_cdev, - &timer_data->delay_on, &timer_data->delay_off)) { - /* no hardware acceleration, blink via timer */ - mod_timer(&timer_data->timer, jiffies + 1); - } - } - ret = count; - } - - return ret; -} - -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); - struct timer_trig_data *timer_data = led_cdev->trigger_data; - - sprintf(buf, "%lu\n", timer_data->delay_off); - - return strlen(buf) + 1; -} - -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); - struct timer_trig_data *timer_data = led_cdev->trigger_data; - int ret = -EINVAL; - char *after; - unsigned long state = simple_strtoul(buf, &after, 10); - size_t count = after - buf; - - if (*after && isspace(*after)) - count++; - - if (count == size) { - if (timer_data->delay_off != state) { - /* the new value differs from the previous */ - timer_data->delay_off = state; - - /* deactivate previous settings */ - del_timer_sync(&timer_data->timer); - - /* try to activate hardware acceleration, if any */ - if (!led_cdev->blink_set || - led_cdev->blink_set(led_cdev, - &timer_data->delay_on, &timer_data->delay_off)) { - /* no hardware acceleration, blink via timer */ - mod_timer(&timer_data->timer, jiffies + 1); - } - } - ret = count; - } - - return ret; -} - -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) -{ - struct timer_trig_data *timer_data; - int rc; - - timer_data = kzalloc(sizeof(struct timer_trig_data), GFP_KERNEL); - if (!timer_data) - return; - - led_cdev->trigger_data = timer_data; - - init_timer(&timer_data->timer); - timer_data->timer.function = led_timer_function; - timer_data->timer.data = (unsigned long) led_cdev; - - rc = device_create_file(led_cdev->dev, &dev_attr_delay_on); - if (rc) - goto err_out; - rc = device_create_file(led_cdev->dev, &dev_attr_delay_off); - if (rc) - goto err_out_delayon; - - /* If there is hardware support for blinking, start one - * user friendly blink rate chosen by the driver. - */ - if (led_cdev->blink_set) - led_cdev->blink_set(led_cdev, - &timer_data->delay_on, &timer_data->delay_off); - - return; - -err_out_delayon: - device_remove_file(led_cdev->dev, &dev_attr_delay_on); -err_out: - led_cdev->trigger_data = NULL; - kfree(timer_data); -} - -static void timer_trig_deactivate(struct led_classdev *led_cdev) -{ - struct timer_trig_data *timer_data = led_cdev->trigger_data; - - if (timer_data) { - device_remove_file(led_cdev->dev, &dev_attr_delay_on); - device_remove_file(led_cdev->dev, &dev_attr_delay_off); - del_timer_sync(&timer_data->timer); - kfree(timer_data); - } -} - -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"); |