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 <mach/hardware.h>
15 #include <asm/hardware/locomo.h>
16
locomoled_brightness_set(struct led_classdev * led_cdev,enum led_brightness value,int offset)17 static void locomoled_brightness_set(struct led_classdev *led_cdev,
18 enum led_brightness value, int offset)
19 {
20 struct locomo_dev *locomo_dev = LOCOMO_DEV(led_cdev->dev->parent);
21 unsigned long flags;
22
23 local_irq_save(flags);
24 if (value)
25 locomo_writel(LOCOMO_LPT_TOFH, locomo_dev->mapbase + offset);
26 else
27 locomo_writel(LOCOMO_LPT_TOFL, locomo_dev->mapbase + offset);
28 local_irq_restore(flags);
29 }
30
locomoled_brightness_set0(struct led_classdev * led_cdev,enum led_brightness value)31 static void locomoled_brightness_set0(struct led_classdev *led_cdev,
32 enum led_brightness value)
33 {
34 locomoled_brightness_set(led_cdev, value, LOCOMO_LPT0);
35 }
36
locomoled_brightness_set1(struct led_classdev * led_cdev,enum led_brightness value)37 static void locomoled_brightness_set1(struct led_classdev *led_cdev,
38 enum led_brightness value)
39 {
40 locomoled_brightness_set(led_cdev, value, LOCOMO_LPT1);
41 }
42
43 static struct led_classdev locomo_led0 = {
44 .name = "locomo:amber:charge",
45 .default_trigger = "main-battery-charging",
46 .brightness_set = locomoled_brightness_set0,
47 };
48
49 static struct led_classdev locomo_led1 = {
50 .name = "locomo:green:mail",
51 .default_trigger = "nand-disk",
52 .brightness_set = locomoled_brightness_set1,
53 };
54
locomoled_probe(struct locomo_dev * ldev)55 static int locomoled_probe(struct locomo_dev *ldev)
56 {
57 int ret;
58
59 ret = devm_led_classdev_register(&ldev->dev, &locomo_led0);
60 if (ret < 0)
61 return ret;
62
63 return devm_led_classdev_register(&ldev->dev, &locomo_led1);
64 }
65
66
67 static struct locomo_driver locomoled_driver = {
68 .drv = {
69 .name = "locomoled"
70 },
71 .devid = LOCOMO_DEVID_LED,
72 .probe = locomoled_probe,
73 };
74
locomoled_init(void)75 static int __init locomoled_init(void)
76 {
77 return locomo_driver_register(&locomoled_driver);
78 }
79 module_init(locomoled_init);
80
81 MODULE_AUTHOR("John Lenz <lenz@cs.wisc.edu>");
82 MODULE_DESCRIPTION("Locomo LED driver");
83 MODULE_LICENSE("GPL");
84