Commit | Line | Data |
---|---|---|
6655c6fe RP |
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 | ||
6655c6fe RP |
14 | #include <linux/module.h> |
15 | #include <linux/kernel.h> | |
16 | #include <linux/init.h> | |
6655c6fe | 17 | #include <linux/device.h> |
3dc7b82e | 18 | #include <linux/ctype.h> |
6655c6fe RP |
19 | #include <linux/leds.h> |
20 | #include "leds.h" | |
21 | ||
4d404fd5 | 22 | static ssize_t led_delay_on_show(struct device *dev, |
f8a7c6fe | 23 | struct device_attribute *attr, char *buf) |
6655c6fe | 24 | { |
f8a7c6fe | 25 | struct led_classdev *led_cdev = dev_get_drvdata(dev); |
6655c6fe | 26 | |
5ada28bf | 27 | return sprintf(buf, "%lu\n", led_cdev->blink_delay_on); |
6655c6fe RP |
28 | } |
29 | ||
4d404fd5 | 30 | static ssize_t led_delay_on_store(struct device *dev, |
f8a7c6fe | 31 | struct device_attribute *attr, const char *buf, size_t size) |
6655c6fe | 32 | { |
f8a7c6fe | 33 | struct led_classdev *led_cdev = dev_get_drvdata(dev); |
6655c6fe RP |
34 | int ret = -EINVAL; |
35 | char *after; | |
36 | unsigned long state = simple_strtoul(buf, &after, 10); | |
3dc7b82e | 37 | size_t count = after - buf; |
6655c6fe | 38 | |
e7d2860b | 39 | if (isspace(*after)) |
3dc7b82e RP |
40 | count++; |
41 | ||
42 | if (count == size) { | |
5ada28bf | 43 | led_blink_set(led_cdev, &state, &led_cdev->blink_delay_off); |
3dc7b82e | 44 | ret = count; |
6655c6fe RP |
45 | } |
46 | ||
47 | return ret; | |
48 | } | |
49 | ||
4d404fd5 | 50 | static ssize_t led_delay_off_show(struct device *dev, |
f8a7c6fe | 51 | struct device_attribute *attr, char *buf) |
6655c6fe | 52 | { |
f8a7c6fe | 53 | struct led_classdev *led_cdev = dev_get_drvdata(dev); |
6655c6fe | 54 | |
5ada28bf | 55 | return sprintf(buf, "%lu\n", led_cdev->blink_delay_off); |
6655c6fe RP |
56 | } |
57 | ||
4d404fd5 | 58 | static ssize_t led_delay_off_store(struct device *dev, |
f8a7c6fe | 59 | struct device_attribute *attr, const char *buf, size_t size) |
6655c6fe | 60 | { |
f8a7c6fe | 61 | struct led_classdev *led_cdev = dev_get_drvdata(dev); |
6655c6fe RP |
62 | int ret = -EINVAL; |
63 | char *after; | |
64 | unsigned long state = simple_strtoul(buf, &after, 10); | |
3dc7b82e RP |
65 | size_t count = after - buf; |
66 | ||
e7d2860b | 67 | if (isspace(*after)) |
3dc7b82e | 68 | count++; |
6655c6fe | 69 | |
3dc7b82e | 70 | if (count == size) { |
5ada28bf | 71 | led_blink_set(led_cdev, &led_cdev->blink_delay_on, &state); |
3dc7b82e | 72 | ret = count; |
6655c6fe RP |
73 | } |
74 | ||
75 | return ret; | |
76 | } | |
77 | ||
f8a7c6fe RP |
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); | |
6655c6fe RP |
80 | |
81 | static void timer_trig_activate(struct led_classdev *led_cdev) | |
82 | { | |
12fda168 | 83 | int rc; |
6655c6fe | 84 | |
5ada28bf | 85 | led_cdev->trigger_data = NULL; |
6655c6fe | 86 | |
f8a7c6fe RP |
87 | rc = device_create_file(led_cdev->dev, &dev_attr_delay_on); |
88 | if (rc) | |
5ada28bf | 89 | return; |
f8a7c6fe RP |
90 | rc = device_create_file(led_cdev->dev, &dev_attr_delay_off); |
91 | if (rc) | |
92 | goto err_out_delayon; | |
12fda168 | 93 | |
5ada28bf | 94 | led_cdev->trigger_data = (void *)1; |
4c79141d | 95 | |
12fda168 JG |
96 | return; |
97 | ||
98 | err_out_delayon: | |
f8a7c6fe | 99 | device_remove_file(led_cdev->dev, &dev_attr_delay_on); |
6655c6fe RP |
100 | } |
101 | ||
102 | static void timer_trig_deactivate(struct led_classdev *led_cdev) | |
103 | { | |
5ada28bf | 104 | if (led_cdev->trigger_data) { |
f8a7c6fe RP |
105 | device_remove_file(led_cdev->dev, &dev_attr_delay_on); |
106 | device_remove_file(led_cdev->dev, &dev_attr_delay_off); | |
6655c6fe | 107 | } |
ce70a245 | 108 | |
5ada28bf JB |
109 | /* Stop blinking */ |
110 | led_brightness_set(led_cdev, LED_OFF); | |
6655c6fe RP |
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"); |