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path: root/drivers/leds/ledtrig-timer.c
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Diffstat (limited to 'drivers/leds/ledtrig-timer.c')
-rw-r--r--drivers/leds/ledtrig-timer.c237
1 files changed, 0 insertions, 237 deletions
diff --git a/drivers/leds/ledtrig-timer.c b/drivers/leds/ledtrig-timer.c
deleted file mode 100644
index 38b3378be44..00000000000
--- a/drivers/leds/ledtrig-timer.c
+++ /dev/null
@@ -1,237 +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 {
- int brightness_on; /* LED brightness during "on" period.
- * (LED_OFF < brightness_on <= LED_FULL)
- */
- 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;
- unsigned long delay;
-
- if (!timer_data->delay_on || !timer_data->delay_off) {
- led_set_brightness(led_cdev, LED_OFF);
- return;
- }
-
- brightness = led_get_brightness(led_cdev);
- if (!brightness) {
- /* Time to switch the LED on. */
- brightness = timer_data->brightness_on;
- delay = timer_data->delay_on;
- } else {
- /* Store the current brightness value to be able
- * to restore it when the delay_off period is over.
- */
- timer_data->brightness_on = brightness;
- brightness = LED_OFF;
- delay = timer_data->delay_off;
- }
-
- 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;
-
- return sprintf(buf, "%lu\n", timer_data->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);
- 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 (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;
-
- return sprintf(buf, "%lu\n", timer_data->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);
- 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 (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;
-
- timer_data->brightness_on = led_get_brightness(led_cdev);
- if (timer_data->brightness_on == LED_OFF)
- timer_data->brightness_on = led_cdev->max_brightness;
- 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;
- unsigned long on = 0, off = 0;
-
- 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);
- }
-
- /* If there is hardware support for blinking, stop it */
- if (led_cdev->blink_set)
- led_cdev->blink_set(led_cdev, &on, &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");
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-11-10 00:02:55 +0000