1 /*
2 * linux/drivers/leds/locomo.c
3 *
4 * Copyright (C) 2005 John Lenz <lenz@cs.wisc.edu>
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
9 */
10
11 #include <linux/config.h>
12 #include <linux/kernel.h>
13 #include <linux/init.h>
14 #include <linux/device.h>
15 #include <linux/leds.h>
16
17 #include <asm/hardware.h>
18 #include <asm/hardware/locomo.h>
19
20 static void locomoled_brightness_set(struct led_classdev *led_cdev,
21 enum led_brightness value, int offset)
22 {
23 struct locomo_dev *locomo_dev = LOCOMO_DEV(led_cdev->class_dev->dev);
24 unsigned long flags;
25
26 local_irq_save(flags);
27 if (value)
28 locomo_writel(LOCOMO_LPT_TOFH, locomo_dev->mapbase + offset);
29 else
30 locomo_writel(LOCOMO_LPT_TOFL, locomo_dev->mapbase + offset);
31 local_irq_restore(flags);
32 }
33
34 static void locomoled_brightness_set0(struct led_classdev *led_cdev,
35 enum led_brightness value)
36 {
37 locomoled_brightness_set(led_cdev, value, LOCOMO_LPT0);
38 }
39
40 static void locomoled_brightness_set1(struct led_classdev *led_cdev,
41 enum led_brightness value)
42 {
43 locomoled_brightness_set(led_cdev, value, LOCOMO_LPT1);
44 }
45
46 static struct led_classdev locomo_led0 = {
47 .name = "locomo:amber",
48 .brightness_set = locomoled_brightness_set0,
49 };
50
51 static struct led_classdev locomo_led1 = {
52 .name = "locomo:green",
53 .brightness_set = locomoled_brightness_set1,
54 };
55
56 static int locomoled_probe(struct locomo_dev *ldev)
57 {
58 int ret;
59
60 ret = led_classdev_register(&ldev->dev, &locomo_led0);
61 if (ret < 0)
62 return ret;
63
64 ret = led_classdev_register(&ldev->dev, &locomo_led1);
65 if (ret < 0)
66 led_classdev_unregister(&locomo_led0);
67
68 return ret;
69 }
70
71 static int locomoled_remove(struct locomo_dev *dev)
72 {
73 led_classdev_unregister(&locomo_led0);
74 led_classdev_unregister(&locomo_led1);
75 return 0;
76 }
77
78 static struct locomo_driver locomoled_driver = {
79 .drv = {
80 .name = "locomoled"
81 },
82 .devid = LOCOMO_DEVID_LED,
83 .probe = locomoled_probe,
84 .remove = locomoled_remove,
85 };
86
87 static int __init locomoled_init(void)
88 {
89 return locomo_driver_register(&locomoled_driver);
90 }
91 module_init(locomoled_init);
92
93 MODULE_AUTHOR("John Lenz <lenz@cs.wisc.edu>");
94 MODULE_DESCRIPTION("Locomo LED driver");
95 MODULE_LICENSE("GPL");
96
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