1 /*
2 * linux/drivers/leds/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/kernel.h>
12 #include <linux/init.h>
13 #include <linux/module.h>
14 #include <linux/device.h>
15 #include <linux/leds.h>
16
17 #include <mach/hardware.h>
18 #include <asm/hardware/locomo.h>
19
locomoled_brightness_set(struct led_classdev * led_cdev,enum led_brightness value,int offset)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->dev->parent);
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
locomoled_brightness_set0(struct led_classdev * led_cdev,enum led_brightness value)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
locomoled_brightness_set1(struct led_classdev * led_cdev,enum led_brightness value)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:charge",
48 .default_trigger = "main-battery-charging",
49 .brightness_set = locomoled_brightness_set0,
50 };
51
52 static struct led_classdev locomo_led1 = {
53 .name = "locomo:green:mail",
54 .default_trigger = "nand-disk",
55 .brightness_set = locomoled_brightness_set1,
56 };
57
locomoled_probe(struct locomo_dev * ldev)58 static int locomoled_probe(struct locomo_dev *ldev)
59 {
60 int ret;
61
62 ret = led_classdev_register(&ldev->dev, &locomo_led0);
63 if (ret < 0)
64 return ret;
65
66 ret = led_classdev_register(&ldev->dev, &locomo_led1);
67 if (ret < 0)
68 led_classdev_unregister(&locomo_led0);
69
70 return ret;
71 }
72
locomoled_remove(struct locomo_dev * dev)73 static int locomoled_remove(struct locomo_dev *dev)
74 {
75 led_classdev_unregister(&locomo_led0);
76 led_classdev_unregister(&locomo_led1);
77 return 0;
78 }
79
80 static struct locomo_driver locomoled_driver = {
81 .drv = {
82 .name = "locomoled"
83 },
84 .devid = LOCOMO_DEVID_LED,
85 .probe = locomoled_probe,
86 .remove = locomoled_remove,
87 };
88
locomoled_init(void)89 static int __init locomoled_init(void)
90 {
91 return locomo_driver_register(&locomoled_driver);
92 }
93 module_init(locomoled_init);
94
95 MODULE_AUTHOR("John Lenz <lenz@cs.wisc.edu>");
96 MODULE_DESCRIPTION("Locomo LED driver");
97 MODULE_LICENSE("GPL");
98