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
locomoled_brightness_set(struct led_classdev * led_cdev,enum led_brightness value,int offset)16 static 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
locomoled_brightness_set0(struct led_classdev * led_cdev,enum led_brightness value)30 static void locomoled_brightness_set0(struct led_classdev *led_cdev,
31 enum led_brightness value)
32 {
33 locomoled_brightness_set(led_cdev, value, LOCOMO_LPT0);
34 }
35
locomoled_brightness_set1(struct led_classdev * led_cdev,enum led_brightness value)36 static void locomoled_brightness_set1(struct led_classdev *led_cdev,
37 enum led_brightness value)
38 {
39 locomoled_brightness_set(led_cdev, value, LOCOMO_LPT1);
40 }
41
42 static struct led_classdev locomo_led0 = {
43 .name = "locomo:amber:charge",
44 .default_trigger = "main-battery-charging",
45 .brightness_set = locomoled_brightness_set0,
46 };
47
48 static struct led_classdev locomo_led1 = {
49 .name = "locomo:green:mail",
50 .default_trigger = "nand-disk",
51 .brightness_set = locomoled_brightness_set1,
52 };
53
locomoled_probe(struct locomo_dev * ldev)54 static int locomoled_probe(struct locomo_dev *ldev)
55 {
56 int ret;
57
58 ret = devm_led_classdev_register(&ldev->dev, &locomo_led0);
59 if (ret < 0)
60 return ret;
61
62 return devm_led_classdev_register(&ldev->dev, &locomo_led1);
63 }
64
65
66 static struct locomo_driver locomoled_driver = {
67 .drv = {
68 .name = "locomoled"
69 },
70 .devid = LOCOMO_DEVID_LED,
71 .probe = locomoled_probe,
72 };
73
locomoled_init(void)74 static int __init locomoled_init(void)
75 {
76 return locomo_driver_register(&locomoled_driver);
77 }
78 module_init(locomoled_init);
79
80 MODULE_AUTHOR("John Lenz <lenz@cs.wisc.edu>");
81 MODULE_DESCRIPTION("Locomo LED driver");
82 MODULE_LICENSE("GPL");
83