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Jonathan McDowell9becde72006-06-23 02:05:33 -07001/*
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
Jonathan McDowell9becde72006-06-23 02:05:33 -070011#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 */
20struct ams_delta_led {
21 struct led_classdev cdev;
22 u8 bitmask;
23};
24
25static 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
37static 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
83static 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
94static 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
108static 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
126static 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
136static 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
146static int __init ams_delta_led_init(void)
147{
148 return platform_driver_register(&ams_delta_led_driver);
149}
150
151static void __exit ams_delta_led_exit(void)
152{
153 return platform_driver_unregister(&ams_delta_led_driver);
154}
155
156module_init(ams_delta_led_init);
157module_exit(ams_delta_led_exit);
158
159MODULE_AUTHOR("Jonathan McDowell <noodles@earth.li>");
160MODULE_DESCRIPTION("Amstrad Delta LED driver");
161MODULE_LICENSE("GPL");