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