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leds: Add rb532 LED driver for the User LED

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Mikrotik built six LEDs into the Routerboard 532, from which one is
destined for custom use, the so called "User LED". This patch adds a
driver for it, based on the LEDs class.

Signed-off-by: Phil Sutter <n0-1@freewrt.org>
Acked-by: Florian Fainelli <florian@openwrt.org>
Signed-off-by: Richard Purdie <rpurdie@linux.intel.com>
This commit is contained in:
Phil Sutter 2009-01-22 19:35:48 +01:00 committed by Richard Purdie
parent defb512d25
commit ac67e23bed
3 changed files with 85 additions and 0 deletions
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7
drivers/leds/Kconfig
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@ -31,6 +31,13 @@ config LEDS_LOCOMO
This option enables support for the LEDs on Sharp Locomo.
Zaurus models SL-5500 and SL-5600.
config LEDS_MIKROTIK_RB532
tristate "LED Support for Mikrotik Routerboard 532"
depends on LEDS_CLASS && MIKROTIK_RB532
help
This option enables support for the so called "User LED" of
Mikrotik's Routerboard 532.
config LEDS_S3C24XX
tristate "LED Support for Samsung S3C24XX GPIO LEDs"
depends on LEDS_CLASS && ARCH_S3C2410

1
drivers/leds/Makefile
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@ -7,6 +7,7 @@ obj-$(CONFIG_LEDS_TRIGGERS) += led-triggers.o
# LED Platform Drivers
obj-$(CONFIG_LEDS_ATMEL_PWM) += leds-atmel-pwm.o
obj-$(CONFIG_LEDS_LOCOMO) += leds-locomo.o
obj-$(CONFIG_LEDS_MIKROTIK_RB532) += leds-rb532.o
obj-$(CONFIG_LEDS_S3C24XX) += leds-s3c24xx.o
obj-$(CONFIG_LEDS_AMS_DELTA) += leds-ams-delta.o
obj-$(CONFIG_LEDS_NET48XX) += leds-net48xx.o

77
drivers/leds/leds-rb532.c Normal file
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@ -0,0 +1,77 @@
/*
* LEDs driver for the "User LED" on Routerboard532
*
* Copyright (C) 2009 Phil Sutter <n0-1@freewrt.org>
*
* Based on leds-cobalt-qube.c by Florian Fainelly and
* rb-diag.c (my own standalone driver for both LED and
* button of Routerboard532).
*/
#include <linux/leds.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <asm/mach-rc32434/gpio.h>
#include <asm/mach-rc32434/rb.h>
static void rb532_led_set(struct led_classdev *cdev,
enum led_brightness brightness)
{
if (brightness)
set_latch_u5(LO_ULED, 0);
else
set_latch_u5(0, LO_ULED);
}
static enum led_brightness rb532_led_get(struct led_classdev *cdev)
{
return (get_latch_u5() & LO_ULED) ? LED_FULL : LED_OFF;
}
static struct led_classdev rb532_uled = {
.name = "uled",
.brightness_set = rb532_led_set,
.brightness_get = rb532_led_get,
.default_trigger = "nand-disk",
};
static int __devinit rb532_led_probe(struct platform_device *pdev)
{
return led_classdev_register(&pdev->dev, &rb532_uled);
}
static int __devexit rb532_led_remove(struct platform_device *pdev)
{
led_classdev_unregister(&rb532_uled);
return 0;
}
static struct platform_driver rb532_led_driver = {
.probe = rb532_led_probe,
.remove = __devexit_p(rb532_led_remove),
.driver = {
.name = "rb532-led",
.owner = THIS_MODULE,
},
};
static int __init rb532_led_init(void)
{
return platform_driver_register(&rb532_led_driver);
}
static void __exit rb532_led_exit(void)
{
platform_driver_unregister(&rb532_led_driver);
}
module_init(rb532_led_init);
module_exit(rb532_led_exit);
MODULE_ALIAS("platform:rb532-led");
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("User LED support for Routerboard532");
MODULE_AUTHOR("Phil Sutter <n0-1@freewrt.org>");