pasemi_mac: clear out old errors on interface open
[linux-2.6] / drivers / leds / leds-ams-delta.c
1 /*
2  * LEDs driver for Amstrad Delta (E3)
3  *
4  * Copyright (C) 2006 Jonathan McDowell <noodles@earth.li>
5  *
6  * This program is free software; you can redistribute it and/or modify
7  * it under the terms of the GNU General Public License version 2 as
8  * published by the Free Software Foundation.
9  */
10
11 #include <linux/kernel.h>
12 #include <linux/init.h>
13 #include <linux/platform_device.h>
14 #include <linux/leds.h>
15 #include <asm/arch/board-ams-delta.h>
16
17 /*
18  * Our context
19  */
20 struct ams_delta_led {
21         struct led_classdev     cdev;
22         u8                      bitmask;
23 };
24
25 static void ams_delta_led_set(struct led_classdev *led_cdev,
26                 enum led_brightness value)
27 {
28         struct ams_delta_led *led_dev =
29                 container_of(led_cdev, struct ams_delta_led, cdev);
30
31         if (value)
32                 ams_delta_latch1_write(led_dev->bitmask, led_dev->bitmask);
33         else
34                 ams_delta_latch1_write(led_dev->bitmask, 0);
35 }
36
37 static struct ams_delta_led ams_delta_leds[] = {
38         {
39                 .cdev           = {
40                         .name           = "ams-delta:camera",
41                         .brightness_set = ams_delta_led_set,
42                 },
43                 .bitmask        = AMS_DELTA_LATCH1_LED_CAMERA,
44         },
45         {
46                 .cdev           = {
47                         .name           = "ams-delta:advert",
48                         .brightness_set = ams_delta_led_set,
49                 },
50                 .bitmask        = AMS_DELTA_LATCH1_LED_ADVERT,
51         },
52         {
53                 .cdev           = {
54                         .name           = "ams-delta:email",
55                         .brightness_set = ams_delta_led_set,
56                 },
57                 .bitmask        = AMS_DELTA_LATCH1_LED_EMAIL,
58         },
59         {
60                 .cdev           = {
61                         .name           = "ams-delta:handsfree",
62                         .brightness_set = ams_delta_led_set,
63                 },
64                 .bitmask        = AMS_DELTA_LATCH1_LED_HANDSFREE,
65         },
66         {
67                 .cdev           = {
68                         .name           = "ams-delta:voicemail",
69                         .brightness_set = ams_delta_led_set,
70                 },
71                 .bitmask        = AMS_DELTA_LATCH1_LED_VOICEMAIL,
72         },
73         {
74                 .cdev           = {
75                         .name           = "ams-delta:voice",
76                         .brightness_set = ams_delta_led_set,
77                 },
78                 .bitmask        = AMS_DELTA_LATCH1_LED_VOICE,
79         },
80 };
81
82 #ifdef CONFIG_PM
83 static int ams_delta_led_suspend(struct platform_device *dev,
84                 pm_message_t state)
85 {
86         int i;
87
88         for (i = 0; i < ARRAY_SIZE(ams_delta_leds); i++)
89                 led_classdev_suspend(&ams_delta_leds[i].cdev);
90
91         return 0;
92 }
93
94 static int ams_delta_led_resume(struct platform_device *dev)
95 {
96         int i;
97
98         for (i = 0; i < ARRAY_SIZE(ams_delta_leds); i++)
99                 led_classdev_resume(&ams_delta_leds[i].cdev);
100
101         return 0;
102 }
103 #else
104 #define ams_delta_led_suspend NULL
105 #define ams_delta_led_resume NULL
106 #endif
107
108 static int ams_delta_led_probe(struct platform_device *pdev)
109 {
110         int i;
111         int ret;
112
113         for (i = ret = 0; ret >= 0 && i < ARRAY_SIZE(ams_delta_leds); i++) {
114                 ret = led_classdev_register(&pdev->dev,
115                                 &ams_delta_leds[i].cdev);
116         }
117
118         if (ret < 0 && i > 1) {
119                 for (i = i - 2; i >= 0; i--)
120                         led_classdev_unregister(&ams_delta_leds[i].cdev);
121         }
122
123         return ret;
124 }
125
126 static int ams_delta_led_remove(struct platform_device *pdev)
127 {
128         int i;
129
130         for (i = ARRAY_SIZE(ams_delta_leds) - 1; i >= 0; i--)
131                 led_classdev_unregister(&ams_delta_leds[i].cdev);
132
133         return 0;
134 }
135
136 static struct platform_driver ams_delta_led_driver = {
137         .probe          = ams_delta_led_probe,
138         .remove         = ams_delta_led_remove,
139         .suspend        = ams_delta_led_suspend,
140         .resume         = ams_delta_led_resume,
141         .driver         = {
142                 .name = "ams-delta-led",
143         },
144 };
145
146 static int __init ams_delta_led_init(void)
147 {
148         return platform_driver_register(&ams_delta_led_driver);
149 }
150
151 static void __exit ams_delta_led_exit(void)
152 {
153         return platform_driver_unregister(&ams_delta_led_driver);
154 }
155
156 module_init(ams_delta_led_init);
157 module_exit(ams_delta_led_exit);
158
159 MODULE_AUTHOR("Jonathan McDowell <noodles@earth.li>");
160 MODULE_DESCRIPTION("Amstrad Delta LED driver");
161 MODULE_LICENSE("GPL");