Richard Purdie | 6655c6f | 2006-03-31 02:31:07 -0800 | [diff] [blame] | 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 | |
Richard Purdie | 6655c6f | 2006-03-31 02:31:07 -0800 | [diff] [blame] | 14 | #include <linux/module.h> |
| 15 | #include <linux/kernel.h> |
| 16 | #include <linux/init.h> |
Richard Purdie | 6655c6f | 2006-03-31 02:31:07 -0800 | [diff] [blame] | 17 | #include <linux/device.h> |
Richard Purdie | 3dc7b82 | 2006-05-15 09:44:17 -0700 | [diff] [blame] | 18 | #include <linux/ctype.h> |
Richard Purdie | 6655c6f | 2006-03-31 02:31:07 -0800 | [diff] [blame] | 19 | #include <linux/leds.h> |
| 20 | #include "leds.h" |
| 21 | |
Németh Márton | 4d404fd | 2008-03-09 20:59:57 +0000 | [diff] [blame] | 22 | static ssize_t led_delay_on_show(struct device *dev, |
Richard Purdie | f8a7c6f | 2007-07-08 23:19:31 +0100 | [diff] [blame] | 23 | struct device_attribute *attr, char *buf) |
Richard Purdie | 6655c6f | 2006-03-31 02:31:07 -0800 | [diff] [blame] | 24 | { |
Richard Purdie | f8a7c6f | 2007-07-08 23:19:31 +0100 | [diff] [blame] | 25 | struct led_classdev *led_cdev = dev_get_drvdata(dev); |
Richard Purdie | 6655c6f | 2006-03-31 02:31:07 -0800 | [diff] [blame] | 26 | |
Johannes Berg | 5ada28b | 2010-11-11 14:05:21 -0800 | [diff] [blame] | 27 | return sprintf(buf, "%lu\n", led_cdev->blink_delay_on); |
Richard Purdie | 6655c6f | 2006-03-31 02:31:07 -0800 | [diff] [blame] | 28 | } |
| 29 | |
Németh Márton | 4d404fd | 2008-03-09 20:59:57 +0000 | [diff] [blame] | 30 | static ssize_t led_delay_on_store(struct device *dev, |
Richard Purdie | f8a7c6f | 2007-07-08 23:19:31 +0100 | [diff] [blame] | 31 | struct device_attribute *attr, const char *buf, size_t size) |
Richard Purdie | 6655c6f | 2006-03-31 02:31:07 -0800 | [diff] [blame] | 32 | { |
Richard Purdie | f8a7c6f | 2007-07-08 23:19:31 +0100 | [diff] [blame] | 33 | struct led_classdev *led_cdev = dev_get_drvdata(dev); |
Shuah Khan | 872b86b | 2012-05-29 15:07:26 -0700 | [diff] [blame^] | 34 | unsigned long state; |
| 35 | ssize_t ret = -EINVAL; |
Richard Purdie | 6655c6f | 2006-03-31 02:31:07 -0800 | [diff] [blame] | 36 | |
Shuah Khan | 872b86b | 2012-05-29 15:07:26 -0700 | [diff] [blame^] | 37 | ret = kstrtoul(buf, 10, &state); |
| 38 | if (ret) |
| 39 | return ret; |
Richard Purdie | 3dc7b82 | 2006-05-15 09:44:17 -0700 | [diff] [blame] | 40 | |
Shuah Khan | 872b86b | 2012-05-29 15:07:26 -0700 | [diff] [blame^] | 41 | led_blink_set(led_cdev, &state, &led_cdev->blink_delay_off); |
| 42 | led_cdev->blink_delay_on = state; |
Richard Purdie | 6655c6f | 2006-03-31 02:31:07 -0800 | [diff] [blame] | 43 | |
Shuah Khan | 872b86b | 2012-05-29 15:07:26 -0700 | [diff] [blame^] | 44 | return size; |
Richard Purdie | 6655c6f | 2006-03-31 02:31:07 -0800 | [diff] [blame] | 45 | } |
| 46 | |
Németh Márton | 4d404fd | 2008-03-09 20:59:57 +0000 | [diff] [blame] | 47 | static ssize_t led_delay_off_show(struct device *dev, |
Richard Purdie | f8a7c6f | 2007-07-08 23:19:31 +0100 | [diff] [blame] | 48 | struct device_attribute *attr, char *buf) |
Richard Purdie | 6655c6f | 2006-03-31 02:31:07 -0800 | [diff] [blame] | 49 | { |
Richard Purdie | f8a7c6f | 2007-07-08 23:19:31 +0100 | [diff] [blame] | 50 | struct led_classdev *led_cdev = dev_get_drvdata(dev); |
Richard Purdie | 6655c6f | 2006-03-31 02:31:07 -0800 | [diff] [blame] | 51 | |
Johannes Berg | 5ada28b | 2010-11-11 14:05:21 -0800 | [diff] [blame] | 52 | return sprintf(buf, "%lu\n", led_cdev->blink_delay_off); |
Richard Purdie | 6655c6f | 2006-03-31 02:31:07 -0800 | [diff] [blame] | 53 | } |
| 54 | |
Németh Márton | 4d404fd | 2008-03-09 20:59:57 +0000 | [diff] [blame] | 55 | static ssize_t led_delay_off_store(struct device *dev, |
Richard Purdie | f8a7c6f | 2007-07-08 23:19:31 +0100 | [diff] [blame] | 56 | struct device_attribute *attr, const char *buf, size_t size) |
Richard Purdie | 6655c6f | 2006-03-31 02:31:07 -0800 | [diff] [blame] | 57 | { |
Richard Purdie | f8a7c6f | 2007-07-08 23:19:31 +0100 | [diff] [blame] | 58 | struct led_classdev *led_cdev = dev_get_drvdata(dev); |
Shuah Khan | 872b86b | 2012-05-29 15:07:26 -0700 | [diff] [blame^] | 59 | unsigned long state; |
| 60 | ssize_t ret = -EINVAL; |
Richard Purdie | 6655c6f | 2006-03-31 02:31:07 -0800 | [diff] [blame] | 61 | |
Shuah Khan | 872b86b | 2012-05-29 15:07:26 -0700 | [diff] [blame^] | 62 | ret = kstrtoul(buf, 10, &state); |
| 63 | if (ret) |
| 64 | return ret; |
Richard Purdie | 3dc7b82 | 2006-05-15 09:44:17 -0700 | [diff] [blame] | 65 | |
Shuah Khan | 872b86b | 2012-05-29 15:07:26 -0700 | [diff] [blame^] | 66 | led_blink_set(led_cdev, &led_cdev->blink_delay_on, &state); |
| 67 | led_cdev->blink_delay_off = state; |
Richard Purdie | 6655c6f | 2006-03-31 02:31:07 -0800 | [diff] [blame] | 68 | |
Shuah Khan | 872b86b | 2012-05-29 15:07:26 -0700 | [diff] [blame^] | 69 | return size; |
Richard Purdie | 6655c6f | 2006-03-31 02:31:07 -0800 | [diff] [blame] | 70 | } |
| 71 | |
Richard Purdie | f8a7c6f | 2007-07-08 23:19:31 +0100 | [diff] [blame] | 72 | static DEVICE_ATTR(delay_on, 0644, led_delay_on_show, led_delay_on_store); |
| 73 | static DEVICE_ATTR(delay_off, 0644, led_delay_off_show, led_delay_off_store); |
Richard Purdie | 6655c6f | 2006-03-31 02:31:07 -0800 | [diff] [blame] | 74 | |
| 75 | static void timer_trig_activate(struct led_classdev *led_cdev) |
| 76 | { |
Jeff Garzik | 12fda16 | 2006-10-17 00:10:20 -0700 | [diff] [blame] | 77 | int rc; |
Richard Purdie | 6655c6f | 2006-03-31 02:31:07 -0800 | [diff] [blame] | 78 | |
Johannes Berg | 5ada28b | 2010-11-11 14:05:21 -0800 | [diff] [blame] | 79 | led_cdev->trigger_data = NULL; |
Richard Purdie | 6655c6f | 2006-03-31 02:31:07 -0800 | [diff] [blame] | 80 | |
Richard Purdie | f8a7c6f | 2007-07-08 23:19:31 +0100 | [diff] [blame] | 81 | rc = device_create_file(led_cdev->dev, &dev_attr_delay_on); |
| 82 | if (rc) |
Johannes Berg | 5ada28b | 2010-11-11 14:05:21 -0800 | [diff] [blame] | 83 | return; |
Richard Purdie | f8a7c6f | 2007-07-08 23:19:31 +0100 | [diff] [blame] | 84 | rc = device_create_file(led_cdev->dev, &dev_attr_delay_off); |
| 85 | if (rc) |
| 86 | goto err_out_delayon; |
Jeff Garzik | 12fda16 | 2006-10-17 00:10:20 -0700 | [diff] [blame] | 87 | |
Esben Haabendal | fff26f8 | 2011-05-24 17:13:22 -0700 | [diff] [blame] | 88 | led_blink_set(led_cdev, &led_cdev->blink_delay_on, |
| 89 | &led_cdev->blink_delay_off); |
| 90 | |
Johannes Berg | 5ada28b | 2010-11-11 14:05:21 -0800 | [diff] [blame] | 91 | led_cdev->trigger_data = (void *)1; |
Márton Németh | 4c79141 | 2007-10-31 15:07:12 +0100 | [diff] [blame] | 92 | |
Jeff Garzik | 12fda16 | 2006-10-17 00:10:20 -0700 | [diff] [blame] | 93 | return; |
| 94 | |
| 95 | err_out_delayon: |
Richard Purdie | f8a7c6f | 2007-07-08 23:19:31 +0100 | [diff] [blame] | 96 | device_remove_file(led_cdev->dev, &dev_attr_delay_on); |
Richard Purdie | 6655c6f | 2006-03-31 02:31:07 -0800 | [diff] [blame] | 97 | } |
| 98 | |
| 99 | static void timer_trig_deactivate(struct led_classdev *led_cdev) |
| 100 | { |
Johannes Berg | 5ada28b | 2010-11-11 14:05:21 -0800 | [diff] [blame] | 101 | if (led_cdev->trigger_data) { |
Richard Purdie | f8a7c6f | 2007-07-08 23:19:31 +0100 | [diff] [blame] | 102 | device_remove_file(led_cdev->dev, &dev_attr_delay_on); |
| 103 | device_remove_file(led_cdev->dev, &dev_attr_delay_off); |
Richard Purdie | 6655c6f | 2006-03-31 02:31:07 -0800 | [diff] [blame] | 104 | } |
Rodolfo Giometti | ce70a24 | 2009-01-08 19:50:15 +0000 | [diff] [blame] | 105 | |
Johannes Berg | 5ada28b | 2010-11-11 14:05:21 -0800 | [diff] [blame] | 106 | /* Stop blinking */ |
| 107 | led_brightness_set(led_cdev, LED_OFF); |
Richard Purdie | 6655c6f | 2006-03-31 02:31:07 -0800 | [diff] [blame] | 108 | } |
| 109 | |
| 110 | static struct led_trigger timer_led_trigger = { |
| 111 | .name = "timer", |
| 112 | .activate = timer_trig_activate, |
| 113 | .deactivate = timer_trig_deactivate, |
| 114 | }; |
| 115 | |
| 116 | static int __init timer_trig_init(void) |
| 117 | { |
| 118 | return led_trigger_register(&timer_led_trigger); |
| 119 | } |
| 120 | |
| 121 | static void __exit timer_trig_exit(void) |
| 122 | { |
| 123 | led_trigger_unregister(&timer_led_trigger); |
| 124 | } |
| 125 | |
| 126 | module_init(timer_trig_init); |
| 127 | module_exit(timer_trig_exit); |
| 128 | |
| 129 | MODULE_AUTHOR("Richard Purdie <rpurdie@openedhand.com>"); |
| 130 | MODULE_DESCRIPTION("Timer LED trigger"); |
| 131 | MODULE_LICENSE("GPL"); |