xref: /openbmc/linux/drivers/leds/leds-hp6xx.c (revision 2c684d89)
1 /*
2  * LED Triggers Core
3  * For the HP Jornada 620/660/680/690 handhelds
4  *
5  * Copyright 2008 Kristoffer Ericson <kristoffer.ericson@gmail.com>
6  *     this driver is based on leds-spitz.c by Richard Purdie.
7  *
8  * This program is free software; you can redistribute it and/or modify
9  * it under the terms of the GNU General Public License version 2 as
10  * published by the Free Software Foundation.
11  */
12 
13 #include <linux/module.h>
14 #include <linux/kernel.h>
15 #include <linux/platform_device.h>
16 #include <linux/leds.h>
17 #include <asm/hd64461.h>
18 #include <mach/hp6xx.h>
19 
20 static void hp6xxled_green_set(struct led_classdev *led_cdev,
21 			       enum led_brightness value)
22 {
23 	u8 v8;
24 
25 	v8 = inb(PKDR);
26 	if (value)
27 		outb(v8 & (~PKDR_LED_GREEN), PKDR);
28 	else
29 		outb(v8 | PKDR_LED_GREEN, PKDR);
30 }
31 
32 static void hp6xxled_red_set(struct led_classdev *led_cdev,
33 			     enum led_brightness value)
34 {
35 	u16 v16;
36 
37 	v16 = inw(HD64461_GPBDR);
38 	if (value)
39 		outw(v16 & (~HD64461_GPBDR_LED_RED), HD64461_GPBDR);
40 	else
41 		outw(v16 | HD64461_GPBDR_LED_RED, HD64461_GPBDR);
42 }
43 
44 static struct led_classdev hp6xx_red_led = {
45 	.name			= "hp6xx:red",
46 	.default_trigger	= "hp6xx-charge",
47 	.brightness_set		= hp6xxled_red_set,
48 	.flags			= LED_CORE_SUSPENDRESUME,
49 };
50 
51 static struct led_classdev hp6xx_green_led = {
52 	.name			= "hp6xx:green",
53 	.default_trigger	= "ide-disk",
54 	.brightness_set		= hp6xxled_green_set,
55 	.flags			= LED_CORE_SUSPENDRESUME,
56 };
57 
58 static int hp6xxled_probe(struct platform_device *pdev)
59 {
60 	int ret;
61 
62 	ret = devm_led_classdev_register(&pdev->dev, &hp6xx_red_led);
63 	if (ret < 0)
64 		return ret;
65 
66 	return devm_led_classdev_register(&pdev->dev, &hp6xx_green_led);
67 }
68 
69 static struct platform_driver hp6xxled_driver = {
70 	.probe		= hp6xxled_probe,
71 	.driver		= {
72 		.name		= "hp6xx-led",
73 	},
74 };
75 
76 module_platform_driver(hp6xxled_driver);
77 
78 MODULE_AUTHOR("Kristoffer Ericson <kristoffer.ericson@gmail.com>");
79 MODULE_DESCRIPTION("HP Jornada 6xx LED driver");
80 MODULE_LICENSE("GPL");
81 MODULE_ALIAS("platform:hp6xx-led");
82