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[PATCH] LED Class support for Soekris net48xx 

Add LED Class device support for the Soekris net48xx Error LED.  Tested
only on a net4801, but should work on a net4826 as well.  I'd love to find
a way of detecting a Soekris net48xx device but there is no DMI or any
Soekris-specific PCI devices.

[akpm@osdl.org: fixlets, cleanups]
Signed-off-by: Chris Boot <bootc@bootc.net>
Cc: Ben Dooks <ben-linux@fluff.org>
Cc: Richard Purdie <rpurdie@rpsys.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Chris Boot 2006-07-10 04:45:34 -07:00 committed by Linus Torvalds
parent 36cf96f5e7
commit 1a87d9425e
4 changed files with 128 additions and 0 deletions
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5
MAINTAINERS
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@ -2666,6 +2666,11 @@ M: shemminger@osdl.org
L: netdev@vger.kernel.org
S: Maintained
SOEKRIS NET48XX LED SUPPORT
P: Chris Boot
M: bootc@bootc.net
S: Maintained
SPARC (sparc32):
P: William L. Irwin
M: wli@holomorphy.com

7
drivers/leds/Kconfig
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@ -69,6 +69,13 @@ config LEDS_AMS_DELTA
help
This option enables support for the LEDs on Amstrad Delta (E3).
config LEDS_NET48XX
tristate "LED Support for Soekris net48xx series Error LED"
depends on LEDS_CLASS && SCx200_GPIO
help
This option enables support for the Soekris net4801 and net4826 error
LED.
comment "LED Triggers"
config LEDS_TRIGGERS

1
drivers/leds/Makefile
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@ -12,6 +12,7 @@ obj-$(CONFIG_LEDS_IXP4XX) += leds-ixp4xx-gpio.o
obj-$(CONFIG_LEDS_TOSA) += leds-tosa.o
obj-$(CONFIG_LEDS_S3C24XX) += leds-s3c24xx.o
obj-$(CONFIG_LEDS_AMS_DELTA) += leds-ams-delta.o
obj-$(CONFIG_LEDS_NET48XX) += leds-net48xx.o
# LED Triggers
obj-$(CONFIG_LEDS_TRIGGER_TIMER) += ledtrig-timer.o

115
drivers/leds/leds-net48xx.c Normal file
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@ -0,0 +1,115 @@
/*
* LEDs driver for Soekris net48xx
*
* Copyright (C) 2006 Chris Boot <bootc@bootc.net>
*
* Based on leds-ams-delta.c
*
* 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/kernel.h>
#include <linux/init.h>
#include <linux/platform_device.h>
#include <linux/leds.h>
#include <linux/err.h>
#include <asm/io.h>
#include <linux/scx200_gpio.h>
#define NET48XX_ERROR_LED_GPIO 20
static struct platform_device *pdev;
static void net48xx_error_led_set(struct led_classdev *led_cdev,
enum led_brightness value)
{
if (value)
scx200_gpio_set_high(NET48XX_ERROR_LED_GPIO);
else
scx200_gpio_set_low(NET48XX_ERROR_LED_GPIO);
}
static struct led_classdev net48xx_error_led = {
.name = "net48xx:error",
.brightness_set = net48xx_error_led_set,
};
#ifdef CONFIG_PM
static int net48xx_led_suspend(struct platform_device *dev,
pm_message_t state)
{
led_classdev_suspend(&net48xx_error_led);
return 0;
}
static int net48xx_led_resume(struct platform_device *dev)
{
led_classdev_resume(&net48xx_error_led);
return 0;
}
#else
#define net48xx_led_suspend NULL
#define net48xx_led_resume NULL
#endif
static int net48xx_led_probe(struct platform_device *pdev)
{
return led_classdev_register(&pdev->dev, &net48xx_error_led);
}
static int net48xx_led_remove(struct platform_device *pdev)
{
led_classdev_unregister(&net48xx_error_led);
return 0;
}
static struct platform_driver net48xx_led_driver = {
.driver.owner = THIS_MODULE,
.probe = net48xx_led_probe,
.remove = net48xx_led_remove,
.suspend = net48xx_led_suspend,
.resume = net48xx_led_resume,
.driver = {
.name = "net48xx-led",
},
};
static int __init net48xx_led_init(void)
{
int ret;
if (!scx200_gpio_present()) {
ret = -ENODEV;
goto out;
}
ret = platform_driver_register(&net48xx_led_driver);
if (ret < 0)
goto out;
pdev = platform_device_register_simple("net48xx-led", -1, NULL, 0);
if (IS_ERR(pdev)) {
ret = PTR_ERR(pdev);
platform_driver_unregister(&net48xx_led_driver);
goto out;
}
out:
return ret;
}
static void __exit net48xx_led_exit(void)
{
platform_device_unregister(pdev);
platform_driver_unregister(&net48xx_led_driver);
}
module_init(net48xx_led_init);
module_exit(net48xx_led_exit);
MODULE_AUTHOR("Chris Boot <bootc@bootc.net>");
MODULE_DESCRIPTION("Soekris net48xx LED driver");
MODULE_LICENSE("GPL");