blob: 93987a12da494594881dde8c375d94a246cd2254 [file] [log] [blame]
Chris Boot1a87d942006-07-10 04:45:34 -07001/*
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>
Chris Bootcfedc922006-09-29 01:59:08 -070019#include <linux/nsc_gpio.h>
Chris Boot1a87d942006-07-10 04:45:34 -070020#include <linux/scx200_gpio.h>
21
Chris Bootbca3bff2006-07-14 00:24:21 -070022#define DRVNAME "net48xx-led"
Chris Boot1a87d942006-07-10 04:45:34 -070023#define NET48XX_ERROR_LED_GPIO 20
24
25static struct platform_device *pdev;
26
27static void net48xx_error_led_set(struct led_classdev *led_cdev,
28 enum led_brightness value)
29{
Chris Bootcfedc922006-09-29 01:59:08 -070030 scx200_gpio_ops.gpio_set(NET48XX_ERROR_LED_GPIO, value ? 1 : 0);
Chris Boot1a87d942006-07-10 04:45:34 -070031}
32
33static struct led_classdev net48xx_error_led = {
Richard Purdie6c152be2007-10-31 15:00:07 +010034 .name = "net48xx::error",
Chris Boot1a87d942006-07-10 04:45:34 -070035 .brightness_set = net48xx_error_led_set,
Richard Purdie859cb7f2009-01-08 17:55:03 +000036 .flags = LED_CORE_SUSPENDRESUME,
Chris Boot1a87d942006-07-10 04:45:34 -070037};
38
Chris Boot1a87d942006-07-10 04:45:34 -070039static int net48xx_led_probe(struct platform_device *pdev)
40{
41 return led_classdev_register(&pdev->dev, &net48xx_error_led);
42}
43
44static int net48xx_led_remove(struct platform_device *pdev)
45{
46 led_classdev_unregister(&net48xx_error_led);
47 return 0;
48}
49
50static struct platform_driver net48xx_led_driver = {
Chris Boot1a87d942006-07-10 04:45:34 -070051 .probe = net48xx_led_probe,
52 .remove = net48xx_led_remove,
Chris Boot1a87d942006-07-10 04:45:34 -070053 .driver = {
Chris Bootbca3bff2006-07-14 00:24:21 -070054 .name = DRVNAME,
55 .owner = THIS_MODULE,
Chris Boot1a87d942006-07-10 04:45:34 -070056 },
57};
58
59static int __init net48xx_led_init(void)
60{
61 int ret;
62
Chris Bootcfedc922006-09-29 01:59:08 -070063 /* small hack, but scx200_gpio doesn't set .dev if the probe fails */
64 if (!scx200_gpio_ops.dev) {
Chris Boot1a87d942006-07-10 04:45:34 -070065 ret = -ENODEV;
66 goto out;
67 }
68
69 ret = platform_driver_register(&net48xx_led_driver);
70 if (ret < 0)
71 goto out;
72
Chris Bootbca3bff2006-07-14 00:24:21 -070073 pdev = platform_device_register_simple(DRVNAME, -1, NULL, 0);
Chris Boot1a87d942006-07-10 04:45:34 -070074 if (IS_ERR(pdev)) {
75 ret = PTR_ERR(pdev);
76 platform_driver_unregister(&net48xx_led_driver);
77 goto out;
78 }
79
80out:
81 return ret;
82}
83
84static void __exit net48xx_led_exit(void)
85{
86 platform_device_unregister(pdev);
87 platform_driver_unregister(&net48xx_led_driver);
88}
89
90module_init(net48xx_led_init);
91module_exit(net48xx_led_exit);
92
93MODULE_AUTHOR("Chris Boot <bootc@bootc.net>");
94MODULE_DESCRIPTION("Soekris net48xx LED driver");
95MODULE_LICENSE("GPL");
96