Commit | Line | Data |
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0d75565f KK |
1 | /* |
2 | * LEDs driver for PCEngines WRAP | |
3 | * | |
4 | * Copyright (C) 2006 Kristian Kielhofner <kris@krisk.org> | |
5 | * | |
6 | * Based on leds-net48xx.c | |
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 | #include <linux/kernel.h> | |
14 | #include <linux/init.h> | |
15 | #include <linux/platform_device.h> | |
16 | #include <linux/leds.h> | |
17 | #include <linux/err.h> | |
18 | #include <asm/io.h> | |
19 | #include <linux/scx200_gpio.h> | |
20 | ||
21 | #define DRVNAME "wrap-led" | |
f5506a2f | 22 | #define WRAP_POWER_LED_GPIO 2 |
0d75565f | 23 | #define WRAP_ERROR_LED_GPIO 3 |
f5506a2f | 24 | #define WRAP_EXTRA_LED_GPIO 18 |
0d75565f KK |
25 | |
26 | static struct platform_device *pdev; | |
27 | ||
f5506a2f ML |
28 | static void wrap_power_led_set(struct led_classdev *led_cdev, |
29 | enum led_brightness value) | |
30 | { | |
31 | if (value) | |
32 | scx200_gpio_set_low(WRAP_POWER_LED_GPIO); | |
33 | else | |
34 | scx200_gpio_set_high(WRAP_POWER_LED_GPIO); | |
35 | } | |
36 | ||
0d75565f KK |
37 | static void wrap_error_led_set(struct led_classdev *led_cdev, |
38 | enum led_brightness value) | |
39 | { | |
40 | if (value) | |
41 | scx200_gpio_set_low(WRAP_ERROR_LED_GPIO); | |
42 | else | |
43 | scx200_gpio_set_high(WRAP_ERROR_LED_GPIO); | |
44 | } | |
45 | ||
46 | static void wrap_extra_led_set(struct led_classdev *led_cdev, | |
47 | enum led_brightness value) | |
48 | { | |
49 | if (value) | |
50 | scx200_gpio_set_low(WRAP_EXTRA_LED_GPIO); | |
51 | else | |
52 | scx200_gpio_set_high(WRAP_EXTRA_LED_GPIO); | |
53 | } | |
54 | ||
f5506a2f ML |
55 | static struct led_classdev wrap_power_led = { |
56 | .name = "wrap::power", | |
57 | .brightness_set = wrap_power_led_set, | |
58 | }; | |
59 | ||
0d75565f | 60 | static struct led_classdev wrap_error_led = { |
6c152bee | 61 | .name = "wrap::error", |
0d75565f KK |
62 | .brightness_set = wrap_error_led_set, |
63 | }; | |
64 | ||
65 | static struct led_classdev wrap_extra_led = { | |
6c152bee | 66 | .name = "wrap::extra", |
0d75565f KK |
67 | .brightness_set = wrap_extra_led_set, |
68 | }; | |
69 | ||
70 | #ifdef CONFIG_PM | |
71 | static int wrap_led_suspend(struct platform_device *dev, | |
72 | pm_message_t state) | |
73 | { | |
f5506a2f | 74 | led_classdev_suspend(&wrap_power_led); |
0d75565f KK |
75 | led_classdev_suspend(&wrap_error_led); |
76 | led_classdev_suspend(&wrap_extra_led); | |
77 | return 0; | |
78 | } | |
79 | ||
80 | static int wrap_led_resume(struct platform_device *dev) | |
81 | { | |
f5506a2f | 82 | led_classdev_resume(&wrap_power_led); |
0d75565f KK |
83 | led_classdev_resume(&wrap_error_led); |
84 | led_classdev_resume(&wrap_extra_led); | |
85 | return 0; | |
86 | } | |
87 | #else | |
88 | #define wrap_led_suspend NULL | |
89 | #define wrap_led_resume NULL | |
90 | #endif | |
91 | ||
92 | static int wrap_led_probe(struct platform_device *pdev) | |
93 | { | |
94 | int ret; | |
95 | ||
f5506a2f ML |
96 | ret = led_classdev_register(&pdev->dev, &wrap_power_led); |
97 | if (ret < 0) | |
98 | return ret; | |
99 | ||
0d75565f | 100 | ret = led_classdev_register(&pdev->dev, &wrap_error_led); |
f5506a2f ML |
101 | if (ret < 0) |
102 | goto err1; | |
103 | ||
104 | ret = led_classdev_register(&pdev->dev, &wrap_extra_led); | |
105 | if (ret < 0) | |
106 | goto err2; | |
107 | ||
108 | return ret; | |
109 | ||
110 | err2: | |
111 | led_classdev_unregister(&wrap_error_led); | |
112 | err1: | |
113 | led_classdev_unregister(&wrap_power_led); | |
114 | ||
0d75565f KK |
115 | return ret; |
116 | } | |
117 | ||
118 | static int wrap_led_remove(struct platform_device *pdev) | |
119 | { | |
f5506a2f | 120 | led_classdev_unregister(&wrap_power_led); |
0d75565f KK |
121 | led_classdev_unregister(&wrap_error_led); |
122 | led_classdev_unregister(&wrap_extra_led); | |
123 | return 0; | |
124 | } | |
125 | ||
126 | static struct platform_driver wrap_led_driver = { | |
127 | .probe = wrap_led_probe, | |
128 | .remove = wrap_led_remove, | |
129 | .suspend = wrap_led_suspend, | |
130 | .resume = wrap_led_resume, | |
131 | .driver = { | |
132 | .name = DRVNAME, | |
133 | .owner = THIS_MODULE, | |
134 | }, | |
135 | }; | |
136 | ||
137 | static int __init wrap_led_init(void) | |
138 | { | |
139 | int ret; | |
140 | ||
141 | if (!scx200_gpio_present()) { | |
142 | ret = -ENODEV; | |
143 | goto out; | |
144 | } | |
145 | ||
146 | ret = platform_driver_register(&wrap_led_driver); | |
147 | if (ret < 0) | |
148 | goto out; | |
149 | ||
150 | pdev = platform_device_register_simple(DRVNAME, -1, NULL, 0); | |
151 | if (IS_ERR(pdev)) { | |
152 | ret = PTR_ERR(pdev); | |
153 | platform_driver_unregister(&wrap_led_driver); | |
154 | goto out; | |
155 | } | |
156 | ||
157 | out: | |
158 | return ret; | |
159 | } | |
160 | ||
161 | static void __exit wrap_led_exit(void) | |
162 | { | |
163 | platform_device_unregister(pdev); | |
164 | platform_driver_unregister(&wrap_led_driver); | |
165 | } | |
166 | ||
167 | module_init(wrap_led_init); | |
168 | module_exit(wrap_led_exit); | |
169 | ||
170 | MODULE_AUTHOR("Kristian Kielhofner <kris@krisk.org>"); | |
171 | MODULE_DESCRIPTION("PCEngines WRAP LED driver"); | |
172 | MODULE_LICENSE("GPL"); | |
173 |