1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3  * LED Triggers Core
4  * For the HP Jornada 620/660/680/690 handhelds
5  *
6  * Copyright 2008 Kristoffer Ericson <kristoffer.ericson@gmail.com>
7  *     this driver is based on leds-spitz.c by Richard Purdie.
8  */
9 
10 #include <linux/module.h>
11 #include <linux/kernel.h>
12 #include <linux/platform_device.h>
13 #include <linux/leds.h>
14 #include <asm/hd64461.h>
15 #include <mach/hp6xx.h>
16 
hp6xxled_green_set(struct led_classdev * led_cdev,enum led_brightness value)17 static void hp6xxled_green_set(struct led_classdev *led_cdev,
18 			       enum led_brightness value)
19 {
20 	u8 v8;
21 
22 	v8 = inb(PKDR);
23 	if (value)
24 		outb(v8 & (~PKDR_LED_GREEN), PKDR);
25 	else
26 		outb(v8 | PKDR_LED_GREEN, PKDR);
27 }
28 
hp6xxled_red_set(struct led_classdev * led_cdev,enum led_brightness value)29 static void hp6xxled_red_set(struct led_classdev *led_cdev,
30 			     enum led_brightness value)
31 {
32 	u16 v16;
33 
34 	v16 = inw(HD64461_GPBDR);
35 	if (value)
36 		outw(v16 & (~HD64461_GPBDR_LED_RED), HD64461_GPBDR);
37 	else
38 		outw(v16 | HD64461_GPBDR_LED_RED, HD64461_GPBDR);
39 }
40 
41 static struct led_classdev hp6xx_red_led = {
42 	.name			= "hp6xx:red",
43 	.default_trigger	= "hp6xx-charge",
44 	.brightness_set		= hp6xxled_red_set,
45 	.flags			= LED_CORE_SUSPENDRESUME,
46 };
47 
48 static struct led_classdev hp6xx_green_led = {
49 	.name			= "hp6xx:green",
50 	.default_trigger	= "disk-activity",
51 	.brightness_set		= hp6xxled_green_set,
52 	.flags			= LED_CORE_SUSPENDRESUME,
53 };
54 
hp6xxled_probe(struct platform_device * pdev)55 static int hp6xxled_probe(struct platform_device *pdev)
56 {
57 	int ret;
58 
59 	ret = devm_led_classdev_register(&pdev->dev, &hp6xx_red_led);
60 	if (ret < 0)
61 		return ret;
62 
63 	return devm_led_classdev_register(&pdev->dev, &hp6xx_green_led);
64 }
65 
66 static struct platform_driver hp6xxled_driver = {
67 	.probe		= hp6xxled_probe,
68 	.driver		= {
69 		.name		= "hp6xx-led",
70 	},
71 };
72 
73 module_platform_driver(hp6xxled_driver);
74 
75 MODULE_AUTHOR("Kristoffer Ericson <kristoffer.ericson@gmail.com>");
76 MODULE_DESCRIPTION("HP Jornada 6xx LED driver");
77 MODULE_LICENSE("GPL");
78 MODULE_ALIAS("platform:hp6xx-led");
79