Commit | Line | Data |
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d2912cb1 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
6655c6fe RP |
2 | /* |
3 | * LED Kernel Timer Trigger | |
4 | * | |
5 | * Copyright 2005-2006 Openedhand Ltd. | |
6 | * | |
7 | * Author: Richard Purdie <rpurdie@openedhand.com> | |
6655c6fe RP |
8 | */ |
9 | ||
6655c6fe RP |
10 | #include <linux/module.h> |
11 | #include <linux/kernel.h> | |
12 | #include <linux/init.h> | |
6655c6fe | 13 | #include <linux/device.h> |
3dc7b82e | 14 | #include <linux/ctype.h> |
0f85e849 | 15 | #include <linux/slab.h> |
6655c6fe | 16 | #include <linux/leds.h> |
6655c6fe | 17 | |
4d404fd5 | 18 | static ssize_t led_delay_on_show(struct device *dev, |
f8a7c6fe | 19 | struct device_attribute *attr, char *buf) |
6655c6fe | 20 | { |
2b7b6d44 | 21 | struct led_classdev *led_cdev = led_trigger_get_led(dev); |
6655c6fe | 22 | |
5ada28bf | 23 | return sprintf(buf, "%lu\n", led_cdev->blink_delay_on); |
6655c6fe RP |
24 | } |
25 | ||
4d404fd5 | 26 | static ssize_t led_delay_on_store(struct device *dev, |
f8a7c6fe | 27 | struct device_attribute *attr, const char *buf, size_t size) |
6655c6fe | 28 | { |
2b7b6d44 | 29 | struct led_classdev *led_cdev = led_trigger_get_led(dev); |
872b86be | 30 | unsigned long state; |
c85c7cde | 31 | ssize_t ret; |
6655c6fe | 32 | |
872b86be SK |
33 | ret = kstrtoul(buf, 10, &state); |
34 | if (ret) | |
35 | return ret; | |
3dc7b82e | 36 | |
872b86be SK |
37 | led_blink_set(led_cdev, &state, &led_cdev->blink_delay_off); |
38 | led_cdev->blink_delay_on = state; | |
6655c6fe | 39 | |
872b86be | 40 | return size; |
6655c6fe RP |
41 | } |
42 | ||
4d404fd5 | 43 | static ssize_t led_delay_off_show(struct device *dev, |
f8a7c6fe | 44 | struct device_attribute *attr, char *buf) |
6655c6fe | 45 | { |
2b7b6d44 | 46 | struct led_classdev *led_cdev = led_trigger_get_led(dev); |
6655c6fe | 47 | |
5ada28bf | 48 | return sprintf(buf, "%lu\n", led_cdev->blink_delay_off); |
6655c6fe RP |
49 | } |
50 | ||
4d404fd5 | 51 | static ssize_t led_delay_off_store(struct device *dev, |
f8a7c6fe | 52 | struct device_attribute *attr, const char *buf, size_t size) |
6655c6fe | 53 | { |
2b7b6d44 | 54 | struct led_classdev *led_cdev = led_trigger_get_led(dev); |
872b86be | 55 | unsigned long state; |
c85c7cde | 56 | ssize_t ret; |
3dc7b82e | 57 | |
872b86be SK |
58 | ret = kstrtoul(buf, 10, &state); |
59 | if (ret) | |
60 | return ret; | |
6655c6fe | 61 | |
872b86be SK |
62 | led_blink_set(led_cdev, &led_cdev->blink_delay_on, &state); |
63 | led_cdev->blink_delay_off = state; | |
6655c6fe | 64 | |
872b86be | 65 | return size; |
6655c6fe RP |
66 | } |
67 | ||
f8a7c6fe RP |
68 | static DEVICE_ATTR(delay_on, 0644, led_delay_on_show, led_delay_on_store); |
69 | static DEVICE_ATTR(delay_off, 0644, led_delay_off_show, led_delay_off_store); | |
6655c6fe | 70 | |
2b7b6d44 UKK |
71 | static struct attribute *timer_trig_attrs[] = { |
72 | &dev_attr_delay_on.attr, | |
73 | &dev_attr_delay_off.attr, | |
74 | NULL | |
75 | }; | |
76 | ATTRIBUTE_GROUPS(timer_trig); | |
77 | ||
0f85e849 KK |
78 | static void pattern_init(struct led_classdev *led_cdev) |
79 | { | |
80 | u32 *pattern; | |
81 | unsigned int size = 0; | |
82 | ||
83 | pattern = led_get_default_pattern(led_cdev, &size); | |
84 | if (!pattern) | |
85 | return; | |
86 | ||
87 | if (size != 2) { | |
88 | dev_warn(led_cdev->dev, | |
89 | "Expected 2 but got %u values for delays pattern\n", | |
90 | size); | |
91 | goto out; | |
92 | } | |
93 | ||
94 | led_cdev->blink_delay_on = pattern[0]; | |
95 | led_cdev->blink_delay_off = pattern[1]; | |
96 | /* led_blink_set() called by caller */ | |
97 | ||
98 | out: | |
99 | kfree(pattern); | |
100 | } | |
101 | ||
2282e125 | 102 | static int timer_trig_activate(struct led_classdev *led_cdev) |
6655c6fe | 103 | { |
0f85e849 KK |
104 | if (led_cdev->flags & LED_INIT_DEFAULT_TRIGGER) { |
105 | pattern_init(led_cdev); | |
106 | /* | |
107 | * Mark as initialized even on pattern_init() error because | |
108 | * any consecutive call to it would produce the same error. | |
109 | */ | |
110 | led_cdev->flags &= ~LED_INIT_DEFAULT_TRIGGER; | |
111 | } | |
112 | ||
fff26f81 EH |
113 | led_blink_set(led_cdev, &led_cdev->blink_delay_on, |
114 | &led_cdev->blink_delay_off); | |
2282e125 UKK |
115 | |
116 | return 0; | |
6655c6fe RP |
117 | } |
118 | ||
119 | static void timer_trig_deactivate(struct led_classdev *led_cdev) | |
120 | { | |
5ada28bf | 121 | /* Stop blinking */ |
19cd67e2 | 122 | led_set_brightness(led_cdev, LED_OFF); |
6655c6fe RP |
123 | } |
124 | ||
125 | static struct led_trigger timer_led_trigger = { | |
126 | .name = "timer", | |
127 | .activate = timer_trig_activate, | |
128 | .deactivate = timer_trig_deactivate, | |
2b7b6d44 | 129 | .groups = timer_trig_groups, |
6655c6fe | 130 | }; |
2b7b6d44 | 131 | module_led_trigger(timer_led_trigger); |
6655c6fe RP |
132 | |
133 | MODULE_AUTHOR("Richard Purdie <rpurdie@openedhand.com>"); | |
134 | MODULE_DESCRIPTION("Timer LED trigger"); | |
033692eb | 135 | MODULE_LICENSE("GPL v2"); |