blob: 27d06c52824615567970260e1a6fa9b4657f0e50 [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>
Sachin Kamat6023ff72012-11-25 12:14:13 +053018#include <linux/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>
Paul Gortmaker54f4ded2011-07-03 13:56:03 -040021#include <linux/module.h>
Chris Boot1a87d942006-07-10 04:45:34 -070022
Chris Bootbca3bff2006-07-14 00:24:21 -070023#define DRVNAME "net48xx-led"
Chris Boot1a87d942006-07-10 04:45:34 -070024#define NET48XX_ERROR_LED_GPIO 20
25
26static struct platform_device *pdev;
27
28static void net48xx_error_led_set(struct led_classdev *led_cdev,
29 enum led_brightness value)
30{
Chris Bootcfedc922006-09-29 01:59:08 -070031 scx200_gpio_ops.gpio_set(NET48XX_ERROR_LED_GPIO, value ? 1 : 0);
Chris Boot1a87d942006-07-10 04:45:34 -070032}
33
34static struct led_classdev net48xx_error_led = {
Richard Purdie6c152be2007-10-31 15:00:07 +010035 .name = "net48xx::error",
Chris Boot1a87d942006-07-10 04:45:34 -070036 .brightness_set = net48xx_error_led_set,
Richard Purdie859cb7f2009-01-08 17:55:03 +000037 .flags = LED_CORE_SUSPENDRESUME,
Chris Boot1a87d942006-07-10 04:45:34 -070038};
39
Chris Boot1a87d942006-07-10 04:45:34 -070040static int net48xx_led_probe(struct platform_device *pdev)
41{
42 return led_classdev_register(&pdev->dev, &net48xx_error_led);
43}
44
45static int net48xx_led_remove(struct platform_device *pdev)
46{
47 led_classdev_unregister(&net48xx_error_led);
48 return 0;
49}
50
51static struct platform_driver net48xx_led_driver = {
Chris Boot1a87d942006-07-10 04:45:34 -070052 .probe = net48xx_led_probe,
53 .remove = net48xx_led_remove,
Chris Boot1a87d942006-07-10 04:45:34 -070054 .driver = {
Chris Bootbca3bff2006-07-14 00:24:21 -070055 .name = DRVNAME,
56 .owner = THIS_MODULE,
Chris Boot1a87d942006-07-10 04:45:34 -070057 },
58};
59
60static int __init net48xx_led_init(void)
61{
62 int ret;
63
Chris Bootcfedc922006-09-29 01:59:08 -070064 /* small hack, but scx200_gpio doesn't set .dev if the probe fails */
65 if (!scx200_gpio_ops.dev) {
Chris Boot1a87d942006-07-10 04:45:34 -070066 ret = -ENODEV;
67 goto out;
68 }
69
70 ret = platform_driver_register(&net48xx_led_driver);
71 if (ret < 0)
72 goto out;
73
Chris Bootbca3bff2006-07-14 00:24:21 -070074 pdev = platform_device_register_simple(DRVNAME, -1, NULL, 0);
Chris Boot1a87d942006-07-10 04:45:34 -070075 if (IS_ERR(pdev)) {
76 ret = PTR_ERR(pdev);
77 platform_driver_unregister(&net48xx_led_driver);
78 goto out;
79 }
80
81out:
82 return ret;
83}
84
85static void __exit net48xx_led_exit(void)
86{
87 platform_device_unregister(pdev);
88 platform_driver_unregister(&net48xx_led_driver);
89}
90
91module_init(net48xx_led_init);
92module_exit(net48xx_led_exit);
93
94MODULE_AUTHOR("Chris Boot <bootc@bootc.net>");
95MODULE_DESCRIPTION("Soekris net48xx LED driver");
96MODULE_LICENSE("GPL");
97