leds: add led driver for Bachmann's ot200
Add support for leds on Bachmann's ot200 visualisation device. The device has three leds on the back panel (led_err, led_init and led_run) and can handle up to seven leds on the front panel. The driver was written by Linutronix on behalf of Bachmann electronic GmbH. It incorporates feedback from Lars-Peter Clausen [akpm@linux-foundation.org: add dependency on HAS_IOMEM] Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Signed-off-by: Christian Gmeiner <christian.gmeiner@gmail.com> Cc: Lars-Peter Clausen <lars@metafoo.de> Cc: Richard Purdie <rpurdie@rpsys.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Sebastian Andrzej Siewior
Linus Torvalds
parent
656a070629
commit
e9a4593cc5
|
|
@ -403,6 +403,13 @@ config LEDS_MAX8997
|
|||
This option enables support for on-chip LED drivers on
|
||||
MAXIM MAX8997 PMIC.
|
||||
|
||||
config LEDS_OT200
|
||||
tristate "LED support for the Bachmann OT200"
|
||||
depends on LEDS_CLASS && HAS_IOMEM
|
||||
help
|
||||
This option enables support for the LEDs on the Bachmann OT200.
|
||||
Say Y to enable LEDs on the Bachmann OT200.
|
||||
|
||||
config LEDS_TRIGGERS
|
||||
bool "LED Trigger support"
|
||||
depends on LEDS_CLASS
|
||||
|
|
|
|||
|
|
@ -28,6 +28,7 @@ obj-$(CONFIG_LEDS_LP5523) += leds-lp5523.o
|
|||
obj-$(CONFIG_LEDS_TCA6507) += leds-tca6507.o
|
||||
obj-$(CONFIG_LEDS_CLEVO_MAIL) += leds-clevo-mail.o
|
||||
obj-$(CONFIG_LEDS_HP6XX) += leds-hp6xx.o
|
||||
obj-$(CONFIG_LEDS_OT200) += leds-ot200.o
|
||||
obj-$(CONFIG_LEDS_FSG) += leds-fsg.o
|
||||
obj-$(CONFIG_LEDS_PCA955X) += leds-pca955x.o
|
||||
obj-$(CONFIG_LEDS_DA903X) += leds-da903x.o
|
||||
|
|
|
|||
171
drivers/leds/leds-ot200.c
Normal file
171
drivers/leds/leds-ot200.c
Normal file
|
|
@ -0,0 +1,171 @@
|
|||
/*
|
||||
* Bachmann ot200 leds driver.
|
||||
*
|
||||
* Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
|
||||
* Christian Gmeiner <christian.gmeiner@gmail.com>
|
||||
*
|
||||
* License: GPL as published by the FSF.
|
||||
*/
|
||||
|
||||
#include <linux/kernel.h>
|
||||
#include <linux/init.h>
|
||||
#include <linux/platform_device.h>
|
||||
#include <linux/slab.h>
|
||||
#include <linux/leds.h>
|
||||
#include <linux/io.h>
|
||||
#include <linux/module.h>
|
||||
|
||||
|
||||
struct ot200_led {
|
||||
struct led_classdev cdev;
|
||||
const char *name;
|
||||
unsigned long port;
|
||||
u8 mask;
|
||||
};
|
||||
|
||||
/*
|
||||
* The device has three leds on the back panel (led_err, led_init and led_run)
|
||||
* and can handle up to seven leds on the front panel.
|
||||
*/
|
||||
|
||||
static struct ot200_led leds[] = {
|
||||
{
|
||||
.name = "led_run",
|
||||
.port = 0x5a,
|
||||
.mask = BIT(0),
|
||||
},
|
||||
{
|
||||
.name = "led_init",
|
||||
.port = 0x5a,
|
||||
.mask = BIT(1),
|
||||
},
|
||||
{
|
||||
.name = "led_err",
|
||||
.port = 0x5a,
|
||||
.mask = BIT(2),
|
||||
},
|
||||
{
|
||||
.name = "led_1",
|
||||
.port = 0x49,
|
||||
.mask = BIT(7),
|
||||
},
|
||||
{
|
||||
.name = "led_2",
|
||||
.port = 0x49,
|
||||
.mask = BIT(6),
|
||||
},
|
||||
{
|
||||
.name = "led_3",
|
||||
.port = 0x49,
|
||||
.mask = BIT(5),
|
||||
},
|
||||
{
|
||||
.name = "led_4",
|
||||
.port = 0x49,
|
||||
.mask = BIT(4),
|
||||
},
|
||||
{
|
||||
.name = "led_5",
|
||||
.port = 0x49,
|
||||
.mask = BIT(3),
|
||||
},
|
||||
{
|
||||
.name = "led_6",
|
||||
.port = 0x49,
|
||||
.mask = BIT(2),
|
||||
},
|
||||
{
|
||||
.name = "led_7",
|
||||
.port = 0x49,
|
||||
.mask = BIT(1),
|
||||
}
|
||||
};
|
||||
|
||||
static DEFINE_SPINLOCK(value_lock);
|
||||
|
||||
/*
|
||||
* we need to store the current led states, as it is not
|
||||
* possible to read the current led state via inb().
|
||||
*/
|
||||
static u8 leds_back;
|
||||
static u8 leds_front;
|
||||
|
||||
static void ot200_led_brightness_set(struct led_classdev *led_cdev,
|
||||
enum led_brightness value)
|
||||
{
|
||||
struct ot200_led *led = container_of(led_cdev, struct ot200_led, cdev);
|
||||
u8 *val;
|
||||
unsigned long flags;
|
||||
|
||||
spin_lock_irqsave(&value_lock, flags);
|
||||
|
||||
if (led->port == 0x49)
|
||||
val = &leds_front;
|
||||
else if (led->port == 0x5a)
|
||||
val = &leds_back;
|
||||
else
|
||||
BUG();
|
||||
|
||||
if (value == LED_OFF)
|
||||
*val &= ~led->mask;
|
||||
else
|
||||
*val |= led->mask;
|
||||
|
||||
outb(*val, led->port);
|
||||
spin_unlock_irqrestore(&value_lock, flags);
|
||||
}
|
||||
|
||||
static int __devinit ot200_led_probe(struct platform_device *pdev)
|
||||
{
|
||||
int i;
|
||||
int ret;
|
||||
|
||||
for (i = 0; i < ARRAY_SIZE(leds); i++) {
|
||||
|
||||
leds[i].cdev.name = leds[i].name;
|
||||
leds[i].cdev.brightness_set = ot200_led_brightness_set;
|
||||
|
||||
ret = led_classdev_register(&pdev->dev, &leds[i].cdev);
|
||||
if (ret < 0)
|
||||
goto err;
|
||||
}
|
||||
|
||||
leds_front = 0; /* turn off all front leds */
|
||||
leds_back = BIT(1); /* turn on init led */
|
||||
outb(leds_front, 0x49);
|
||||
outb(leds_back, 0x5a);
|
||||
|
||||
return 0;
|
||||
|
||||
err:
|
||||
for (i = i - 1; i >= 0; i--)
|
||||
led_classdev_unregister(&leds[i].cdev);
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
static int __devexit ot200_led_remove(struct platform_device *pdev)
|
||||
{
|
||||
int i;
|
||||
|
||||
for (i = 0; i < ARRAY_SIZE(leds); i++)
|
||||
led_classdev_unregister(&leds[i].cdev);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static struct platform_driver ot200_led_driver = {
|
||||
.probe = ot200_led_probe,
|
||||
.remove = __devexit_p(ot200_led_remove),
|
||||
.driver = {
|
||||
.name = "leds-ot200",
|
||||
.owner = THIS_MODULE,
|
||||
},
|
||||
};
|
||||
|
||||
module_platform_driver(ot200_led_driver);
|
||||
|
||||
MODULE_AUTHOR("Sebastian A. Siewior <bigeasy@linutronix.de>");
|
||||
MODULE_DESCRIPTION("ot200 LED driver");
|
||||
MODULE_LICENSE("GPL");
|
||||
MODULE_ALIAS("platform:leds-ot200");
|
||||
Loading…
Reference in New Issue
Block a user