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/module.h>
12 #include <linux/kernel.h>
13 #include <linux/init.h>
14 #include <linux/platform_device.h>
15 #include <linux/leds.h>
16 #include <plat/board-ams-delta.h>
17
18 /*
19 * Our context
20 */
21 struct ams_delta_led {
22 struct led_classdev cdev;
23 u8 bitmask;
24 };
25
ams_delta_led_set(struct led_classdev * led_cdev,enum led_brightness value)26 static void ams_delta_led_set(struct led_classdev *led_cdev,
27 enum led_brightness value)
28 {
29 struct ams_delta_led *led_dev =
30 container_of(led_cdev, struct ams_delta_led, cdev);
31
32 if (value)
33 ams_delta_latch1_write(led_dev->bitmask, led_dev->bitmask);
34 else
35 ams_delta_latch1_write(led_dev->bitmask, 0);
36 }
37
38 static struct ams_delta_led ams_delta_leds[] = {
39 {
40 .cdev = {
41 .name = "ams-delta::camera",
42 .brightness_set = ams_delta_led_set,
43 },
44 .bitmask = AMS_DELTA_LATCH1_LED_CAMERA,
45 },
46 {
47 .cdev = {
48 .name = "ams-delta::advert",
49 .brightness_set = ams_delta_led_set,
50 },
51 .bitmask = AMS_DELTA_LATCH1_LED_ADVERT,
52 },
53 {
54 .cdev = {
55 .name = "ams-delta::email",
56 .brightness_set = ams_delta_led_set,
57 },
58 .bitmask = AMS_DELTA_LATCH1_LED_EMAIL,
59 },
60 {
61 .cdev = {
62 .name = "ams-delta::handsfree",
63 .brightness_set = ams_delta_led_set,
64 },
65 .bitmask = AMS_DELTA_LATCH1_LED_HANDSFREE,
66 },
67 {
68 .cdev = {
69 .name = "ams-delta::voicemail",
70 .brightness_set = ams_delta_led_set,
71 },
72 .bitmask = AMS_DELTA_LATCH1_LED_VOICEMAIL,
73 },
74 {
75 .cdev = {
76 .name = "ams-delta::voice",
77 .brightness_set = ams_delta_led_set,
78 },
79 .bitmask = AMS_DELTA_LATCH1_LED_VOICE,
80 },
81 };
82
ams_delta_led_probe(struct platform_device * pdev)83 static int ams_delta_led_probe(struct platform_device *pdev)
84 {
85 int i, ret;
86
87 for (i = 0; i < ARRAY_SIZE(ams_delta_leds); i++) {
88 ams_delta_leds[i].cdev.flags |= LED_CORE_SUSPENDRESUME;
89 ret = led_classdev_register(&pdev->dev,
90 &ams_delta_leds[i].cdev);
91 if (ret < 0)
92 goto fail;
93 }
94
95 return 0;
96 fail:
97 while (--i >= 0)
98 led_classdev_unregister(&ams_delta_leds[i].cdev);
99 return ret;
100 }
101
ams_delta_led_remove(struct platform_device * pdev)102 static int ams_delta_led_remove(struct platform_device *pdev)
103 {
104 int i;
105
106 for (i = 0; i < ARRAY_SIZE(ams_delta_leds); i++)
107 led_classdev_unregister(&ams_delta_leds[i].cdev);
108
109 return 0;
110 }
111
112 static struct platform_driver ams_delta_led_driver = {
113 .probe = ams_delta_led_probe,
114 .remove = ams_delta_led_remove,
115 .driver = {
116 .name = "ams-delta-led",
117 .owner = THIS_MODULE,
118 },
119 };
120
121 module_platform_driver(ams_delta_led_driver);
122
123 MODULE_AUTHOR("Jonathan McDowell <noodles@earth.li>");
124 MODULE_DESCRIPTION("Amstrad Delta LED driver");
125 MODULE_LICENSE("GPL");
126 MODULE_ALIAS("platform:ams-delta-led");
127