Merge branches 'dma-debug/fixes' and 'dma-debug/driver-filter' into dma-debug/2.6.31
[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/nsc_gpio.h>
20 #include <linux/scx200_gpio.h>
21
22 #define DRVNAME "net48xx-led"
23 #define NET48XX_ERROR_LED_GPIO  20
24
25 static struct platform_device *pdev;
26
27 static void net48xx_error_led_set(struct led_classdev *led_cdev,
28                 enum led_brightness value)
29 {
30         scx200_gpio_ops.gpio_set(NET48XX_ERROR_LED_GPIO, value ? 1 : 0);
31 }
32
33 static struct led_classdev net48xx_error_led = {
34         .name           = "net48xx::error",
35         .brightness_set = net48xx_error_led_set,
36         .flags          = LED_CORE_SUSPENDRESUME,
37 };
38
39 static int net48xx_led_probe(struct platform_device *pdev)
40 {
41         return led_classdev_register(&pdev->dev, &net48xx_error_led);
42 }
43
44 static int net48xx_led_remove(struct platform_device *pdev)
45 {
46         led_classdev_unregister(&net48xx_error_led);
47         return 0;
48 }
49
50 static struct platform_driver net48xx_led_driver = {
51         .probe          = net48xx_led_probe,
52         .remove         = net48xx_led_remove,
53         .driver         = {
54                 .name           = DRVNAME,
55                 .owner          = THIS_MODULE,
56         },
57 };
58
59 static int __init net48xx_led_init(void)
60 {
61         int ret;
62
63         /* small hack, but scx200_gpio doesn't set .dev if the probe fails */
64         if (!scx200_gpio_ops.dev) {
65                 ret = -ENODEV;
66                 goto out;
67         }
68
69         ret = platform_driver_register(&net48xx_led_driver);
70         if (ret < 0)
71                 goto out;
72
73         pdev = platform_device_register_simple(DRVNAME, -1, NULL, 0);
74         if (IS_ERR(pdev)) {
75                 ret = PTR_ERR(pdev);
76                 platform_driver_unregister(&net48xx_led_driver);
77                 goto out;
78         }
79
80 out:
81         return ret;
82 }
83
84 static void __exit net48xx_led_exit(void)
85 {
86         platform_device_unregister(pdev);
87         platform_driver_unregister(&net48xx_led_driver);
88 }
89
90 module_init(net48xx_led_init);
91 module_exit(net48xx_led_exit);
92
93 MODULE_AUTHOR("Chris Boot <bootc@bootc.net>");
94 MODULE_DESCRIPTION("Soekris net48xx LED driver");
95 MODULE_LICENSE("GPL");
96