[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: Richard Purdie <rpurdie@rpsys.net>
Cc: Russell King <rmk@arm.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Richard Purdie 2006-03-31 02:31:10 -08:00 committed by Linus Torvalds
parent 3179108daa
commit 4d3cb35476
3 changed files with 103 additions and 0 deletions

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@ -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

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@ -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

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@ -0,0 +1,95 @@
/*
* 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");