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 = devm_led_classdev_register(&pdev->dev, &wrap_power_led);
80	if (ret < 0)
81		return ret;
82
83	ret = devm_led_classdev_register(&pdev->dev, &wrap_error_led);
84	if (ret < 0)
85		return ret;
86
87	return  devm_led_classdev_register(&pdev->dev, &wrap_extra_led);
88}
89
90static struct platform_driver wrap_led_driver = {
91	.probe		= wrap_led_probe,
92	.driver		= {
93		.name		= DRVNAME,
94	},
95};
96
97static int __init wrap_led_init(void)
98{
99	int ret;
100
101	if (!scx200_gpio_present()) {
102		ret = -ENODEV;
103		goto out;
104	}
105
106	ret = platform_driver_register(&wrap_led_driver);
107	if (ret < 0)
108		goto out;
109
110	pdev = platform_device_register_simple(DRVNAME, -1, NULL, 0);
111	if (IS_ERR(pdev)) {
112		ret = PTR_ERR(pdev);
113		platform_driver_unregister(&wrap_led_driver);
114		goto out;
115	}
116
117out:
118	return ret;
119}
120
121static void __exit wrap_led_exit(void)
122{
123	platform_device_unregister(pdev);
124	platform_driver_unregister(&wrap_led_driver);
125}
126
127module_init(wrap_led_init);
128module_exit(wrap_led_exit);
129
130MODULE_AUTHOR("Kristian Kielhofner <kris@krisk.org>");
131MODULE_DESCRIPTION("PCEngines WRAP LED driver");
132MODULE_LICENSE("GPL");
133
134