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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" | |
22 | #define WRAP_ERROR_LED_GPIO 3 | |
23 | #define WRAP_EXTRA_LED_GPIO 18 | |
24 | ||
25 | static struct platform_device *pdev; | |
26 | ||
27 | static void wrap_error_led_set(struct led_classdev *led_cdev, | |
28 | enum led_brightness value) | |
29 | { | |
30 | if (value) | |
31 | scx200_gpio_set_low(WRAP_ERROR_LED_GPIO); | |
32 | else | |
33 | scx200_gpio_set_high(WRAP_ERROR_LED_GPIO); | |
34 | } | |
35 | ||
36 | static void wrap_extra_led_set(struct led_classdev *led_cdev, | |
37 | enum led_brightness value) | |
38 | { | |
39 | if (value) | |
40 | scx200_gpio_set_low(WRAP_EXTRA_LED_GPIO); | |
41 | else | |
42 | scx200_gpio_set_high(WRAP_EXTRA_LED_GPIO); | |
43 | } | |
44 | ||
45 | static struct led_classdev wrap_error_led = { | |
46 | .name = "wrap:error", | |
47 | .brightness_set = wrap_error_led_set, | |
48 | }; | |
49 | ||
50 | static struct led_classdev wrap_extra_led = { | |
51 | .name = "wrap:extra", | |
52 | .brightness_set = wrap_extra_led_set, | |
53 | }; | |
54 | ||
55 | #ifdef CONFIG_PM | |
56 | static int wrap_led_suspend(struct platform_device *dev, | |
57 | pm_message_t state) | |
58 | { | |
59 | led_classdev_suspend(&wrap_error_led); | |
60 | led_classdev_suspend(&wrap_extra_led); | |
61 | return 0; | |
62 | } | |
63 | ||
64 | static int wrap_led_resume(struct platform_device *dev) | |
65 | { | |
66 | led_classdev_resume(&wrap_error_led); | |
67 | led_classdev_resume(&wrap_extra_led); | |
68 | return 0; | |
69 | } | |
70 | #else | |
71 | #define wrap_led_suspend NULL | |
72 | #define wrap_led_resume NULL | |
73 | #endif | |
74 | ||
75 | static int wrap_led_probe(struct platform_device *pdev) | |
76 | { | |
77 | int ret; | |
78 | ||
79 | ret = led_classdev_register(&pdev->dev, &wrap_error_led); | |
80 | if (ret == 0) { | |
81 | ret = led_classdev_register(&pdev->dev, &wrap_extra_led); | |
82 | if (ret < 0) | |
83 | led_classdev_unregister(&wrap_error_led); | |
84 | } | |
85 | return ret; | |
86 | } | |
87 | ||
88 | static int wrap_led_remove(struct platform_device *pdev) | |
89 | { | |
90 | led_classdev_unregister(&wrap_error_led); | |
91 | led_classdev_unregister(&wrap_extra_led); | |
92 | return 0; | |
93 | } | |
94 | ||
95 | static struct platform_driver wrap_led_driver = { | |
96 | .probe = wrap_led_probe, | |
97 | .remove = wrap_led_remove, | |
98 | .suspend = wrap_led_suspend, | |
99 | .resume = wrap_led_resume, | |
100 | .driver = { | |
101 | .name = DRVNAME, | |
102 | .owner = THIS_MODULE, | |
103 | }, | |
104 | }; | |
105 | ||
106 | static int __init wrap_led_init(void) | |
107 | { | |
108 | int ret; | |
109 | ||
110 | if (!scx200_gpio_present()) { | |
111 | ret = -ENODEV; | |
112 | goto out; | |
113 | } | |
114 | ||
115 | ret = platform_driver_register(&wrap_led_driver); | |
116 | if (ret < 0) | |
117 | goto out; | |
118 | ||
119 | pdev = platform_device_register_simple(DRVNAME, -1, NULL, 0); | |
120 | if (IS_ERR(pdev)) { | |
121 | ret = PTR_ERR(pdev); | |
122 | platform_driver_unregister(&wrap_led_driver); | |
123 | goto out; | |
124 | } | |
125 | ||
126 | out: | |
127 | return ret; | |
128 | } | |
129 | ||
130 | static void __exit wrap_led_exit(void) | |
131 | { | |
132 | platform_device_unregister(pdev); | |
133 | platform_driver_unregister(&wrap_led_driver); | |
134 | } | |
135 | ||
136 | module_init(wrap_led_init); | |
137 | module_exit(wrap_led_exit); | |
138 | ||
139 | MODULE_AUTHOR("Kristian Kielhofner <kris@krisk.org>"); | |
140 | MODULE_DESCRIPTION("PCEngines WRAP LED driver"); | |
141 | MODULE_LICENSE("GPL"); | |
142 |