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Commit 4d3cb354 authored by Richard Purdie's avatar Richard Purdie Committed by Linus Torvalds
Browse files

[PATCH] LED: add LED device support for locomo devices 



Adds an LED driver for LEDs exported by the Sharp LOCOMO chip as found on some
models of Sharp Zaurus.

Signed-off-by: default avatarRichard Purdie <rpurdie@rpsys.net>
Cc: Russell King <rmk@arm.linux.org.uk>
Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
parent 3179108d

drivers/leds/Kconfig

+7 −0
Original line number Diff line number Diff line
@@ -29,6 +29,13 @@ config LEDS_CORGI 
	  This option enables support for the LEDs on Sharp Zaurus

	  SL-C7x0 series (C700, C750, C760, C860).



config LEDS_LOCOMO

	tristate "LED Support for Locomo device"

	depends LEDS_CLASS && SHARP_LOCOMO

	help

	  This option enables support for the LEDs on Sharp Locomo.

	  Zaurus models SL-5500 and SL-5600.



config LEDS_SPITZ

	tristate "LED Support for the Sharp SL-Cxx00 series"

	depends LEDS_CLASS && PXA_SHARP_Cxx00

drivers/leds/Makefile

+1 −0
Original line number Diff line number Diff line
@@ -6,6 +6,7 @@ obj-$(CONFIG_LEDS_TRIGGERS) += led-triggers.o 


# LED Platform Drivers

obj-$(CONFIG_LEDS_CORGI)		+= leds-corgi.o

obj-$(CONFIG_LEDS_LOCOMO)		+= leds-locomo.o

obj-$(CONFIG_LEDS_SPITZ)		+= leds-spitz.o



# LED Triggers

drivers/leds/leds-locomo.c

0 → 100644
+95 −0
Original line number Diff line number Diff line 
/*

 * linux/drivers/leds/locomo.c

 *

 * Copyright (C) 2005 John Lenz <lenz@cs.wisc.edu>

 *

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

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

 * published by the Free Software Foundation.

 */



#include <linux/config.h>

#include <linux/kernel.h>

#include <linux/init.h>

#include <linux/device.h>

#include <linux/leds.h>



#include <asm/hardware.h>

#include <asm/hardware/locomo.h>



static void locomoled_brightness_set(struct led_classdev *led_cdev,

				enum led_brightness value, int offset)

{

	struct locomo_dev *locomo_dev = LOCOMO_DEV(led_cdev->class_dev->dev);

	unsigned long flags;



	local_irq_save(flags);

	if (value)

		locomo_writel(LOCOMO_LPT_TOFH, locomo_dev->mapbase + offset);

	else

		locomo_writel(LOCOMO_LPT_TOFL, locomo_dev->mapbase + offset);

	local_irq_restore(flags);

}



static void locomoled_brightness_set0(struct led_classdev *led_cdev,

				enum led_brightness value)

{

	locomoled_brightness_set(led_cdev, value, LOCOMO_LPT0);

}



static void locomoled_brightness_set1(struct led_classdev *led_cdev,

				enum led_brightness value)

{

	locomoled_brightness_set(led_cdev, value, LOCOMO_LPT1);

}



static struct led_classdev locomo_led0 = {

	.name			= "locomo:amber",

	.brightness_set		= locomoled_brightness_set0,

};



static struct led_classdev locomo_led1 = {

	.name			= "locomo:green",

	.brightness_set		= locomoled_brightness_set1,

};



static int locomoled_probe(struct locomo_dev *ldev)

{

	int ret;



	ret = led_classdev_register(&ldev->dev, &locomo_led0);

	if (ret < 0)

		return ret;



	ret = led_classdev_register(&ldev->dev, &locomo_led1);

	if (ret < 0)

		led_classdev_unregister(&locomo_led0);



	return ret;

}



static int locomoled_remove(struct locomo_dev *dev)

{

	led_classdev_unregister(&locomo_led0);

	led_classdev_unregister(&locomo_led1);

	return 0;

}



static struct locomo_driver locomoled_driver = {

	.drv = {

		.name = "locomoled"

	},

	.devid	= LOCOMO_DEVID_LED,

	.probe	= locomoled_probe,

	.remove	= locomoled_remove,

};



static int __init locomoled_init(void)

{

	return locomo_driver_register(&locomoled_driver);

}

module_init(locomoled_init);



MODULE_AUTHOR("John Lenz <lenz@cs.wisc.edu>");

MODULE_DESCRIPTION("Locomo LED driver");

MODULE_LICENSE("GPL");