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1a87d942 CB |
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 | ||
bca3bffe | 21 | #define DRVNAME "net48xx-led" |
1a87d942 CB |
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 = { | |
1a87d942 CB |
70 | .probe = net48xx_led_probe, |
71 | .remove = net48xx_led_remove, | |
72 | .suspend = net48xx_led_suspend, | |
73 | .resume = net48xx_led_resume, | |
74 | .driver = { | |
bca3bffe CB |
75 | .name = DRVNAME, |
76 | .owner = THIS_MODULE, | |
1a87d942 CB |
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 | ||
bca3bffe | 93 | pdev = platform_device_register_simple(DRVNAME, -1, NULL, 0); |
1a87d942 CB |
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 |