summaryrefslogtreecommitdiffstats
path: root/drivers/leds/leds-wrap.c
blob: 5770cc36ec209a49fbf7172ca74b67e003eb739d (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
/*
 * LEDs driver for PCEngines WRAP
 *
 * Copyright (C) 2006 Kristian Kielhofner <kris@krisk.org>
 *
 * Based on leds-net48xx.c
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */

#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/platform_device.h>
#include <linux/leds.h>
#include <linux/err.h>
#include <asm/io.h>
#include <linux/scx200_gpio.h>

#define DRVNAME "wrap-led"
#define WRAP_ERROR_LED_GPIO	3
#define	WRAP_EXTRA_LED_GPIO	18

static struct platform_device *pdev;

static void wrap_error_led_set(struct led_classdev *led_cdev,
		enum led_brightness value)
{
	if (value)
		scx200_gpio_set_low(WRAP_ERROR_LED_GPIO);
	else
		scx200_gpio_set_high(WRAP_ERROR_LED_GPIO);
}

static void wrap_extra_led_set(struct led_classdev *led_cdev,
		enum led_brightness value)
{
	if (value)
		scx200_gpio_set_low(WRAP_EXTRA_LED_GPIO);
	else
		scx200_gpio_set_high(WRAP_EXTRA_LED_GPIO);
}

static struct led_classdev wrap_error_led = {
	.name		= "wrap::error",
	.brightness_set	= wrap_error_led_set,
};

static struct led_classdev wrap_extra_led = {
	.name           = "wrap::extra",
	.brightness_set = wrap_extra_led_set,
};

#ifdef CONFIG_PM
static int wrap_led_suspend(struct platform_device *dev,
		pm_message_t state)
{
	led_classdev_suspend(&wrap_error_led);
	led_classdev_suspend(&wrap_extra_led);
	return 0;
}

static int wrap_led_resume(struct platform_device *dev)
{
	led_classdev_resume(&wrap_error_led);
	led_classdev_resume(&wrap_extra_led);
	return 0;
}
#else
#define wrap_led_suspend NULL
#define wrap_led_resume NULL
#endif

static int wrap_led_probe(struct platform_device *pdev)
{
	int ret;

	ret = led_classdev_register(&pdev->dev, &wrap_error_led);
	if (ret == 0) {
		ret = led_classdev_register(&pdev->dev, &wrap_extra_led);
		if (ret < 0)
			led_classdev_unregister(&wrap_error_led);
	}
	return ret;
}

static int wrap_led_remove(struct platform_device *pdev)
{
	led_classdev_unregister(&wrap_error_led);
	led_classdev_unregister(&wrap_extra_led);
	return 0;
}

static struct platform_driver wrap_led_driver = {
	.probe		= wrap_led_probe,
	.remove		= wrap_led_remove,
	.suspend	= wrap_led_suspend,
	.resume		= wrap_led_resume,
	.driver		= {
		.name		= DRVNAME,
		.owner		= THIS_MODULE,
	},
};

static int __init wrap_led_init(void)
{
	int ret;

	if (!scx200_gpio_present()) {
		ret = -ENODEV;
		goto out;
	}

	ret = platform_driver_register(&wrap_led_driver);
	if (ret < 0)
		goto out;

	pdev = platform_device_register_simple(DRVNAME, -1, NULL, 0);
	if (IS_ERR(pdev)) {
		ret = PTR_ERR(pdev);
		platform_driver_unregister(&wrap_led_driver);
		goto out;
	}

out:
	return ret;
}

static void __exit wrap_led_exit(void)
{
	platform_device_unregister(pdev);
	platform_driver_unregister(&wrap_led_driver);
}

module_init(wrap_led_init);
module_exit(wrap_led_exit);

MODULE_AUTHOR("Kristian Kielhofner <kris@krisk.org>");
MODULE_DESCRIPTION("PCEngines WRAP LED driver");
MODULE_LICENSE("GPL");