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 <linux/io.h>
19#include <linux/scx200_gpio.h>
20#include <linux/module.h>
21
22#define DRVNAME "wrap-led"
23#define WRAP_POWER_LED_GPIO	2
24#define WRAP_ERROR_LED_GPIO	3
25#define WRAP_EXTRA_LED_GPIO	18
26
27static struct platform_device *pdev;
28
29static void wrap_power_led_set(struct led_classdev *led_cdev,
30		enum led_brightness value)
31{
32	if (value)
33		scx200_gpio_set_low(WRAP_POWER_LED_GPIO);
34	else
35		scx200_gpio_set_high(WRAP_POWER_LED_GPIO);
36}
37
38static void wrap_error_led_set(struct led_classdev *led_cdev,
39		enum led_brightness value)
40{
41	if (value)
42		scx200_gpio_set_low(WRAP_ERROR_LED_GPIO);
43	else
44		scx200_gpio_set_high(WRAP_ERROR_LED_GPIO);
45}
46
47static void wrap_extra_led_set(struct led_classdev *led_cdev,
48		enum led_brightness value)
49{
50	if (value)
51		scx200_gpio_set_low(WRAP_EXTRA_LED_GPIO);
52	else
53		scx200_gpio_set_high(WRAP_EXTRA_LED_GPIO);
54}
55
56static struct led_classdev wrap_power_led = {
57	.name			= "wrap::power",
58	.brightness_set		= wrap_power_led_set,
59	.default_trigger	= "default-on",
60	.flags			= LED_CORE_SUSPENDRESUME,
61};
62
63static struct led_classdev wrap_error_led = {
64	.name		= "wrap::error",
65	.brightness_set	= wrap_error_led_set,
66	.flags			= LED_CORE_SUSPENDRESUME,
67};
68
69static struct led_classdev wrap_extra_led = {
70	.name           = "wrap::extra",
71	.brightness_set = wrap_extra_led_set,
72	.flags			= LED_CORE_SUSPENDRESUME,
73};
74
75static int wrap_led_probe(struct platform_device *pdev)
76{
77	int ret;
78
79	ret = led_classdev_register(&pdev->dev, &wrap_power_led);
80	if (ret < 0)
81		return ret;
82
83	ret = led_classdev_register(&pdev->dev, &wrap_error_led);
84	if (ret < 0)
85		goto err1;
86
87	ret = led_classdev_register(&pdev->dev, &wrap_extra_led);
88	if (ret < 0)
89		goto err2;
90
91	return ret;
92
93err2:
94	led_classdev_unregister(&wrap_error_led);
95err1:
96	led_classdev_unregister(&wrap_power_led);
97
98	return ret;
99}
100
101static int wrap_led_remove(struct platform_device *pdev)
102{
103	led_classdev_unregister(&wrap_power_led);
104	led_classdev_unregister(&wrap_error_led);
105	led_classdev_unregister(&wrap_extra_led);
106	return 0;
107}
108
109static struct platform_driver wrap_led_driver = {
110	.probe		= wrap_led_probe,
111	.remove		= wrap_led_remove,
112	.driver		= {
113		.name		= DRVNAME,
114	},
115};
116
117static int __init wrap_led_init(void)
118{
119	int ret;
120
121	if (!scx200_gpio_present()) {
122		ret = -ENODEV;
123		goto out;
124	}
125
126	ret = platform_driver_register(&wrap_led_driver);
127	if (ret < 0)
128		goto out;
129
130	pdev = platform_device_register_simple(DRVNAME, -1, NULL, 0);
131	if (IS_ERR(pdev)) {
132		ret = PTR_ERR(pdev);
133		platform_driver_unregister(&wrap_led_driver);
134		goto out;
135	}
136
137out:
138	return ret;
139}
140
141static void __exit wrap_led_exit(void)
142{
143	platform_device_unregister(pdev);
144	platform_driver_unregister(&wrap_led_driver);
145}
146
147module_init(wrap_led_init);
148module_exit(wrap_led_exit);
149
150MODULE_AUTHOR("Kristian Kielhofner <kris@krisk.org>");
151MODULE_DESCRIPTION("PCEngines WRAP LED driver");
152MODULE_LICENSE("GPL");
153
154