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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> | |
cfedc920 | 19 | #include <linux/nsc_gpio.h> |
1a87d942 CB |
20 | #include <linux/scx200_gpio.h> |
21 | ||
bca3bffe | 22 | #define DRVNAME "net48xx-led" |
1a87d942 CB |
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 | { | |
cfedc920 | 30 | scx200_gpio_ops.gpio_set(NET48XX_ERROR_LED_GPIO, value ? 1 : 0); |
1a87d942 CB |
31 | } |
32 | ||
33 | static struct led_classdev net48xx_error_led = { | |
6c152bee | 34 | .name = "net48xx::error", |
1a87d942 | 35 | .brightness_set = net48xx_error_led_set, |
859cb7f2 | 36 | .flags = LED_CORE_SUSPENDRESUME, |
1a87d942 CB |
37 | }; |
38 | ||
1a87d942 CB |
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 = { | |
1a87d942 CB |
51 | .probe = net48xx_led_probe, |
52 | .remove = net48xx_led_remove, | |
1a87d942 | 53 | .driver = { |
bca3bffe CB |
54 | .name = DRVNAME, |
55 | .owner = THIS_MODULE, | |
1a87d942 CB |
56 | }, |
57 | }; | |
58 | ||
59 | static int __init net48xx_led_init(void) | |
60 | { | |
61 | int ret; | |
62 | ||
cfedc920 CB |
63 | /* small hack, but scx200_gpio doesn't set .dev if the probe fails */ |
64 | if (!scx200_gpio_ops.dev) { | |
1a87d942 CB |
65 | ret = -ENODEV; |
66 | goto out; | |
67 | } | |
68 | ||
69 | ret = platform_driver_register(&net48xx_led_driver); | |
70 | if (ret < 0) | |
71 | goto out; | |
72 | ||
bca3bffe | 73 | pdev = platform_device_register_simple(DRVNAME, -1, NULL, 0); |
1a87d942 CB |
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 |