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 <mach/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
ams_delta_led_set(struct led_classdev * led_cdev,enum led_brightness value)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
ams_delta_led_probe(struct platform_device * pdev)82 static int ams_delta_led_probe(struct platform_device *pdev)
83 {
84 int i, ret;
85
86 for (i = 0; i < ARRAY_SIZE(ams_delta_leds); i++) {
87 ams_delta_leds[i].cdev.flags |= LED_CORE_SUSPENDRESUME;
88 ret = led_classdev_register(&pdev->dev,
89 &ams_delta_leds[i].cdev);
90 if (ret < 0)
91 goto fail;
92 }
93
94 return 0;
95 fail:
96 while (--i >= 0)
97 led_classdev_unregister(&ams_delta_leds[i].cdev);
98 return ret;
99 }
100
ams_delta_led_remove(struct platform_device * pdev)101 static int ams_delta_led_remove(struct platform_device *pdev)
102 {
103 int i;
104
105 for (i = 0; i < ARRAY_SIZE(ams_delta_leds); i++)
106 led_classdev_unregister(&ams_delta_leds[i].cdev);
107
108 return 0;
109 }
110
111 static struct platform_driver ams_delta_led_driver = {
112 .probe = ams_delta_led_probe,
113 .remove = ams_delta_led_remove,
114 .driver = {
115 .name = "ams-delta-led",
116 .owner = THIS_MODULE,
117 },
118 };
119
ams_delta_led_init(void)120 static int __init ams_delta_led_init(void)
121 {
122 return platform_driver_register(&ams_delta_led_driver);
123 }
124
ams_delta_led_exit(void)125 static void __exit ams_delta_led_exit(void)
126 {
127 platform_driver_unregister(&ams_delta_led_driver);
128 }
129
130 module_init(ams_delta_led_init);
131 module_exit(ams_delta_led_exit);
132
133 MODULE_AUTHOR("Jonathan McDowell <noodles@earth.li>");
134 MODULE_DESCRIPTION("Amstrad Delta LED driver");
135 MODULE_LICENSE("GPL");
136 MODULE_ALIAS("platform:ams-delta-led");
137