linux-stable/drivers/leds/leds-s3c24xx.c
Arnd Bergmann 436d42c61c ARM: samsung: move platform_data definitions
Platform data for device drivers should be defined in
include/linux/platform_data/*.h, not in the architecture
and platform specific directories.

This moves such data out of the samsung include directories

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Acked-by: Nicolas Pitre <nico@linaro.org>
Acked-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Cc: Kukjin Kim <kgene.kim@samsung.com>
Cc: Kyungmin Park <kyungmin.park@samsung.com>
Cc: Ben Dooks <ben-linux@fluff.org>
Cc: Jeff Garzik <jgarzik@pobox.com>
Cc: Guenter Roeck <linux@roeck-us.net>
Cc: "Wolfram Sang (embedded platforms)" <w.sang@pengutronix.de>
Cc: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Cc: Bryan Wu <bryan.wu@canonical.com>
Cc: Richard Purdie <rpurdie@rpsys.net>
Cc: Sylwester Nawrocki <s.nawrocki@samsung.com>
Cc: Chris Ball <cjb@laptop.org>
Cc: David Woodhouse <dwmw2@infradead.org>
Cc: Grant Likely <grant.likely@secretlab.ca>
Cc: Felipe Balbi <balbi@ti.com>
Cc: Alan Stern <stern@rowland.harvard.edu>
Cc: Sangbeom Kim <sbkim73@samsung.com>
Cc: Liam Girdwood <lrg@ti.com>
Cc: linux-samsung-soc@vger.kernel.org
2012-09-19 17:42:18 +02:00

131 lines
3.2 KiB
C

/* drivers/leds/leds-s3c24xx.c
*
* (c) 2006 Simtec Electronics
* http://armlinux.simtec.co.uk/
* Ben Dooks <ben@simtec.co.uk>
*
* S3C24XX - LEDs GPIO driver
*
* 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/gpio.h>
#include <linux/slab.h>
#include <linux/module.h>
#include <mach/hardware.h>
#include <mach/regs-gpio.h>
#include <linux/platform_data/leds-s3c24xx.h>
/* our context */
struct s3c24xx_gpio_led {
struct led_classdev cdev;
struct s3c24xx_led_platdata *pdata;
};
static inline struct s3c24xx_gpio_led *pdev_to_gpio(struct platform_device *dev)
{
return platform_get_drvdata(dev);
}
static inline struct s3c24xx_gpio_led *to_gpio(struct led_classdev *led_cdev)
{
return container_of(led_cdev, struct s3c24xx_gpio_led, cdev);
}
static void s3c24xx_led_set(struct led_classdev *led_cdev,
enum led_brightness value)
{
struct s3c24xx_gpio_led *led = to_gpio(led_cdev);
struct s3c24xx_led_platdata *pd = led->pdata;
int state = (value ? 1 : 0) ^ (pd->flags & S3C24XX_LEDF_ACTLOW);
/* there will be a short delay between setting the output and
* going from output to input when using tristate. */
gpio_set_value(pd->gpio, state);
if (pd->flags & S3C24XX_LEDF_TRISTATE) {
if (value)
gpio_direction_output(pd->gpio, state);
else
gpio_direction_input(pd->gpio);
}
}
static int s3c24xx_led_remove(struct platform_device *dev)
{
struct s3c24xx_gpio_led *led = pdev_to_gpio(dev);
led_classdev_unregister(&led->cdev);
return 0;
}
static int s3c24xx_led_probe(struct platform_device *dev)
{
struct s3c24xx_led_platdata *pdata = dev->dev.platform_data;
struct s3c24xx_gpio_led *led;
int ret;
led = devm_kzalloc(&dev->dev, sizeof(struct s3c24xx_gpio_led),
GFP_KERNEL);
if (led == NULL) {
dev_err(&dev->dev, "No memory for device\n");
return -ENOMEM;
}
platform_set_drvdata(dev, led);
led->cdev.brightness_set = s3c24xx_led_set;
led->cdev.default_trigger = pdata->def_trigger;
led->cdev.name = pdata->name;
led->cdev.flags |= LED_CORE_SUSPENDRESUME;
led->pdata = pdata;
ret = devm_gpio_request(&dev->dev, pdata->gpio, "S3C24XX_LED");
if (ret < 0)
return ret;
/* no point in having a pull-up if we are always driving */
s3c_gpio_setpull(pdata->gpio, S3C_GPIO_PULL_NONE);
if (pdata->flags & S3C24XX_LEDF_TRISTATE)
gpio_direction_input(pdata->gpio);
else
gpio_direction_output(pdata->gpio,
pdata->flags & S3C24XX_LEDF_ACTLOW ? 1 : 0);
/* register our new led device */
ret = led_classdev_register(&dev->dev, &led->cdev);
if (ret < 0)
dev_err(&dev->dev, "led_classdev_register failed\n");
return ret;
}
static struct platform_driver s3c24xx_led_driver = {
.probe = s3c24xx_led_probe,
.remove = s3c24xx_led_remove,
.driver = {
.name = "s3c24xx_led",
.owner = THIS_MODULE,
},
};
module_platform_driver(s3c24xx_led_driver);
MODULE_AUTHOR("Ben Dooks <ben@simtec.co.uk>");
MODULE_DESCRIPTION("S3C24XX LED driver");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:s3c24xx_led");