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awilliam
GitHub Repository: awilliam/linux-vfio
 Path: blob/master/drivers/leds/leds-hp6xx.c
15109 views
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/*

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 * LED Triggers Core

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 * For the HP Jornada 620/660/680/690 handhelds

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 *

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 * Copyright 2008 Kristoffer Ericson <[email protected]>

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 *     this driver is based on leds-spitz.c by Richard Purdie.

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 *

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 * This program is free software; you can redistribute it and/or modify

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 * it under the terms of the GNU General Public License version 2 as

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 * published by the Free Software Foundation.

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 */

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#include <linux/kernel.h>

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#include <linux/init.h>

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#include <linux/platform_device.h>

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#include <linux/leds.h>

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#include <asm/hd64461.h>

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#include <mach/hp6xx.h>

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static void hp6xxled_green_set(struct led_classdev *led_cdev,

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			       enum led_brightness value)

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{

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	u8 v8;

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	v8 = inb(PKDR);

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	if (value)

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		outb(v8 & (~PKDR_LED_GREEN), PKDR);

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	else

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		outb(v8 | PKDR_LED_GREEN, PKDR);

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}

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static void hp6xxled_red_set(struct led_classdev *led_cdev,

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			     enum led_brightness value)

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{

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	u16 v16;

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	v16 = inw(HD64461_GPBDR);

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	if (value)

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		outw(v16 & (~HD64461_GPBDR_LED_RED), HD64461_GPBDR);

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	else

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		outw(v16 | HD64461_GPBDR_LED_RED, HD64461_GPBDR);

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}

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static struct led_classdev hp6xx_red_led = {

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	.name			= "hp6xx:red",

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	.default_trigger	= "hp6xx-charge",

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	.brightness_set		= hp6xxled_red_set,

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	.flags			= LED_CORE_SUSPENDRESUME,

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};

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static struct led_classdev hp6xx_green_led = {

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	.name			= "hp6xx:green",

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	.default_trigger	= "ide-disk",

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	.brightness_set		= hp6xxled_green_set,

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	.flags			= LED_CORE_SUSPENDRESUME,

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};

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static int hp6xxled_probe(struct platform_device *pdev)

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{

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	int ret;

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	ret = led_classdev_register(&pdev->dev, &hp6xx_red_led);

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	if (ret < 0)

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		return ret;

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	ret = led_classdev_register(&pdev->dev, &hp6xx_green_led);

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	if (ret < 0)

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		led_classdev_unregister(&hp6xx_red_led);

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	return ret;

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}

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static int hp6xxled_remove(struct platform_device *pdev)

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{

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	led_classdev_unregister(&hp6xx_red_led);

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	led_classdev_unregister(&hp6xx_green_led);

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	return 0;

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}

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/* work with hotplug and coldplug */

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MODULE_ALIAS("platform:hp6xx-led");

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static struct platform_driver hp6xxled_driver = {

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	.probe		= hp6xxled_probe,

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	.remove		= hp6xxled_remove,

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	.driver		= {

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		.name		= "hp6xx-led",

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		.owner		= THIS_MODULE,

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	},

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};

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static int __init hp6xxled_init(void)

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{

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	return platform_driver_register(&hp6xxled_driver);

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}

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static void __exit hp6xxled_exit(void)

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{

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	platform_driver_unregister(&hp6xxled_driver);

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}

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module_init(hp6xxled_init);

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module_exit(hp6xxled_exit);

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MODULE_AUTHOR("Kristoffer Ericson <[email protected]>");

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MODULE_DESCRIPTION("HP Jornada 6xx LED driver");

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MODULE_LICENSE("GPL");

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