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-rw-r--r--drivers/leds/leds-locomo.c95
1 files changed, 95 insertions, 0 deletions
diff --git a/drivers/leds/leds-locomo.c b/drivers/leds/leds-locomo.c
new file mode 100644
index 000000000000..749a86c2adb6
--- /dev/null
+++ b/drivers/leds/leds-locomo.c
@@ -0,0 +1,95 @@
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
20static 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
34static 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
40static 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
46static struct led_classdev locomo_led0 = {
47 .name = "locomo:amber",
48 .brightness_set = locomoled_brightness_set0,
49};
50
51static struct led_classdev locomo_led1 = {
52 .name = "locomo:green",
53 .brightness_set = locomoled_brightness_set1,
54};
55
56static 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
71static 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
78static 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
87static int __init locomoled_init(void)
88{
89 return locomo_driver_register(&locomoled_driver);
90}
91module_init(locomoled_init);
92
93MODULE_AUTHOR("John Lenz <lenz@cs.wisc.edu>");
94MODULE_DESCRIPTION("Locomo LED driver");
95MODULE_LICENSE("GPL");