hwmon: (adt7411) add MODULE_DEVICE_TABLE
[linux-2.6.git] / drivers / leds / ledtrig-timer.c
1 /*
2  * LED Kernel Timer Trigger
3  *
4  * Copyright 2005-2006 Openedhand Ltd.
5  *
6  * Author: Richard Purdie <rpurdie@openedhand.com>
7  *
8  * This program is free software; you can redistribute it and/or modify
9  * it under the terms of the GNU General Public License version 2 as
10  * published by the Free Software Foundation.
11  *
12  */
13
14 #include <linux/module.h>
15 #include <linux/kernel.h>
16 #include <linux/init.h>
17 #include <linux/device.h>
18 #include <linux/ctype.h>
19 #include <linux/leds.h>
20 #include "leds.h"
21
22 static ssize_t led_delay_on_show(struct device *dev,
23                 struct device_attribute *attr, char *buf)
24 {
25         struct led_classdev *led_cdev = dev_get_drvdata(dev);
26
27         return sprintf(buf, "%lu\n", led_cdev->blink_delay_on);
28 }
29
30 static ssize_t led_delay_on_store(struct device *dev,
31                 struct device_attribute *attr, const char *buf, size_t size)
32 {
33         struct led_classdev *led_cdev = dev_get_drvdata(dev);
34         int ret = -EINVAL;
35         char *after;
36         unsigned long state = simple_strtoul(buf, &after, 10);
37         size_t count = after - buf;
38
39         if (isspace(*after))
40                 count++;
41
42         if (count == size) {
43                 led_blink_set(led_cdev, &state, &led_cdev->blink_delay_off);
44                 ret = count;
45         }
46
47         return ret;
48 }
49
50 static ssize_t led_delay_off_show(struct device *dev,
51                 struct device_attribute *attr, char *buf)
52 {
53         struct led_classdev *led_cdev = dev_get_drvdata(dev);
54
55         return sprintf(buf, "%lu\n", led_cdev->blink_delay_off);
56 }
57
58 static ssize_t led_delay_off_store(struct device *dev,
59                 struct device_attribute *attr, const char *buf, size_t size)
60 {
61         struct led_classdev *led_cdev = dev_get_drvdata(dev);
62         int ret = -EINVAL;
63         char *after;
64         unsigned long state = simple_strtoul(buf, &after, 10);
65         size_t count = after - buf;
66
67         if (isspace(*after))
68                 count++;
69
70         if (count == size) {
71                 led_blink_set(led_cdev, &led_cdev->blink_delay_on, &state);
72                 ret = count;
73         }
74
75         return ret;
76 }
77
78 static DEVICE_ATTR(delay_on, 0644, led_delay_on_show, led_delay_on_store);
79 static DEVICE_ATTR(delay_off, 0644, led_delay_off_show, led_delay_off_store);
80
81 static void timer_trig_activate(struct led_classdev *led_cdev)
82 {
83         int rc;
84
85         led_cdev->trigger_data = NULL;
86
87         rc = device_create_file(led_cdev->dev, &dev_attr_delay_on);
88         if (rc)
89                 return;
90         rc = device_create_file(led_cdev->dev, &dev_attr_delay_off);
91         if (rc)
92                 goto err_out_delayon;
93
94         led_cdev->trigger_data = (void *)1;
95
96         return;
97
98 err_out_delayon:
99         device_remove_file(led_cdev->dev, &dev_attr_delay_on);
100 }
101
102 static void timer_trig_deactivate(struct led_classdev *led_cdev)
103 {
104         if (led_cdev->trigger_data) {
105                 device_remove_file(led_cdev->dev, &dev_attr_delay_on);
106                 device_remove_file(led_cdev->dev, &dev_attr_delay_off);
107         }
108
109         /* Stop blinking */
110         led_brightness_set(led_cdev, LED_OFF);
111 }
112
113 static struct led_trigger timer_led_trigger = {
114         .name     = "timer",
115         .activate = timer_trig_activate,
116         .deactivate = timer_trig_deactivate,
117 };
118
119 static int __init timer_trig_init(void)
120 {
121         return led_trigger_register(&timer_led_trigger);
122 }
123
124 static void __exit timer_trig_exit(void)
125 {
126         led_trigger_unregister(&timer_led_trigger);
127 }
128
129 module_init(timer_trig_init);
130 module_exit(timer_trig_exit);
131
132 MODULE_AUTHOR("Richard Purdie <rpurdie@openedhand.com>");
133 MODULE_DESCRIPTION("Timer LED trigger");
134 MODULE_LICENSE("GPL");