1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * linux/drivers/leds/leds-locomo.c
4 *
5 * Copyright (C) 2005 John Lenz <lenz@cs.wisc.edu>
6 */
7
8#include <linux/kernel.h>
9#include <linux/init.h>
10#include <linux/module.h>
11#include <linux/device.h>
12#include <linux/leds.h>
13
14#include <asm/hardware/locomo.h>
15
16static void locomoled_brightness_set(struct led_classdev *led_cdev,
17 enum led_brightness value, int offset)
18{
19 struct locomo_dev *locomo_dev = LOCOMO_DEV(led_cdev->dev->parent);
20 unsigned long flags;
21
22 local_irq_save(flags);
23 if (value)
24 locomo_writel(LOCOMO_LPT_TOFH, locomo_dev->mapbase + offset);
25 else
26 locomo_writel(LOCOMO_LPT_TOFL, locomo_dev->mapbase + offset);
27 local_irq_restore(flags);
28}
29
30static void locomoled_brightness_set0(struct led_classdev *led_cdev,
31 enum led_brightness value)
32{
33 locomoled_brightness_set(led_cdev, value, offset: LOCOMO_LPT0);
34}
35
36static void locomoled_brightness_set1(struct led_classdev *led_cdev,
37 enum led_brightness value)
38{
39 locomoled_brightness_set(led_cdev, value, offset: LOCOMO_LPT1);
40}
41
42static struct led_classdev locomo_led0 = {
43 .name = "locomo:amber:charge",
44 .default_trigger = "main-battery-charging",
45 .brightness_set = locomoled_brightness_set0,
46};
47
48static struct led_classdev locomo_led1 = {
49 .name = "locomo:green:mail",
50 .default_trigger = "nand-disk",
51 .brightness_set = locomoled_brightness_set1,
52};
53
54static int locomoled_probe(struct locomo_dev *ldev)
55{
56 int ret;
57
58 ret = devm_led_classdev_register(parent: &ldev->dev, led_cdev: &locomo_led0);
59 if (ret < 0)
60 return ret;
61
62 return devm_led_classdev_register(parent: &ldev->dev, led_cdev: &locomo_led1);
63}
64
65
66static struct locomo_driver locomoled_driver = {
67 .drv = {
68 .name = "locomoled"
69 },
70 .devid = LOCOMO_DEVID_LED,
71 .probe = locomoled_probe,
72};
73
74static int __init locomoled_init(void)
75{
76 return locomo_driver_register(&locomoled_driver);
77}
78module_init(locomoled_init);
79
80MODULE_AUTHOR("John Lenz <lenz@cs.wisc.edu>");
81MODULE_DESCRIPTION("Locomo LED driver");
82MODULE_LICENSE("GPL");
83

source code of linux/drivers/leds/leds-locomo.c