Merge branch 'upstream-fixes' into upstream
[linux-2.6] / drivers / leds / leds-net48xx.c
1 /*
2  * LEDs driver for Soekris net48xx
3  *
4  * Copyright (C) 2006 Chris Boot <bootc@bootc.net>
5  *
6  * Based on leds-ams-delta.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 <asm/io.h>
19 #include <linux/scx200_gpio.h>
20
21 #define DRVNAME "net48xx-led"
22 #define NET48XX_ERROR_LED_GPIO  20
23
24 static struct platform_device *pdev;
25
26 static void net48xx_error_led_set(struct led_classdev *led_cdev,
27                 enum led_brightness value)
28 {
29         if (value)
30                 scx200_gpio_set_high(NET48XX_ERROR_LED_GPIO);
31         else
32                 scx200_gpio_set_low(NET48XX_ERROR_LED_GPIO);
33 }
34
35 static struct led_classdev net48xx_error_led = {
36         .name           = "net48xx:error",
37         .brightness_set = net48xx_error_led_set,
38 };
39
40 #ifdef CONFIG_PM
41 static int net48xx_led_suspend(struct platform_device *dev,
42                 pm_message_t state)
43 {
44         led_classdev_suspend(&net48xx_error_led);
45         return 0;
46 }
47
48 static int net48xx_led_resume(struct platform_device *dev)
49 {
50         led_classdev_resume(&net48xx_error_led);
51         return 0;
52 }
53 #else
54 #define net48xx_led_suspend NULL
55 #define net48xx_led_resume NULL
56 #endif
57
58 static int net48xx_led_probe(struct platform_device *pdev)
59 {
60         return led_classdev_register(&pdev->dev, &net48xx_error_led);
61 }
62
63 static int net48xx_led_remove(struct platform_device *pdev)
64 {
65         led_classdev_unregister(&net48xx_error_led);
66         return 0;
67 }
68
69 static struct platform_driver net48xx_led_driver = {
70         .probe          = net48xx_led_probe,
71         .remove         = net48xx_led_remove,
72         .suspend        = net48xx_led_suspend,
73         .resume         = net48xx_led_resume,
74         .driver         = {
75                 .name           = DRVNAME,
76                 .owner          = THIS_MODULE,
77         },
78 };
79
80 static int __init net48xx_led_init(void)
81 {
82         int ret;
83
84         if (!scx200_gpio_present()) {
85                 ret = -ENODEV;
86                 goto out;
87         }
88
89         ret = platform_driver_register(&net48xx_led_driver);
90         if (ret < 0)
91                 goto out;
92
93         pdev = platform_device_register_simple(DRVNAME, -1, NULL, 0);
94         if (IS_ERR(pdev)) {
95                 ret = PTR_ERR(pdev);
96                 platform_driver_unregister(&net48xx_led_driver);
97                 goto out;
98         }
99
100 out:
101         return ret;
102 }
103
104 static void __exit net48xx_led_exit(void)
105 {
106         platform_device_unregister(pdev);
107         platform_driver_unregister(&net48xx_led_driver);
108 }
109
110 module_init(net48xx_led_init);
111 module_exit(net48xx_led_exit);
112
113 MODULE_AUTHOR("Chris Boot <bootc@bootc.net>");
114 MODULE_DESCRIPTION("Soekris net48xx LED driver");
115 MODULE_LICENSE("GPL");
116