#include <linux/kernel.h>

#include <linux/init.h>

#include <linux/platform_device.h>

#include <linux/leds.h>  

#include <mach/hardware.h>

#include <mach/regs-gpio.h>

#include <mach/leds-gpio.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;  

/* there will be a short delay between setting the output and

* going from output to input when using tristate. */  

s3c2410_gpio_setpin(pd->gpio, (value ?  : ) ^

(pd->flags & S3C24XX_LEDF_ACTLOW));  

if (pd->flags & S3C24XX_LEDF_TRISTATE)

s3c2410_gpio_cfgpin(pd->gpio,

value ? S3C2410_GPIO_OUTPUT : S3C2410_GPIO_INPUT);  

}  

static int s3c24xx_led_remove(struct platform_device *dev)

{

struct s3c24xx_gpio_led *led = pdev_to_gpio(dev);  

led_classdev_unregister(&led->cdev);

kfree(led);  

return ;

}  

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 = kzalloc(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->pdata = pdata;  

/* no point in having a pull-up if we are always driving */  

if (pdata->flags & S3C24XX_LEDF_TRISTATE) {

s3c2410_gpio_setpin(pdata->gpio, );

s3c2410_gpio_cfgpin(pdata->gpio, S3C2410_GPIO_INPUT);

} else {

s3c2410_gpio_pullup(pdata->gpio, );

s3c2410_gpio_setpin(pdata->gpio, );

s3c2410_gpio_cfgpin(pdata->gpio, S3C2410_GPIO_OUTPUT);

}  

/* register our new led device */  

ret = led_classdev_register(&dev->dev, &led->cdev);

if (ret < ) {

dev_err(&dev->dev, "led_classdev_register failed\n");

goto exit_err1;

}  

return ;  

 exit_err1:

kfree(led);

return ret;

}  

#ifdef CONFIG_PM

static int s3c24xx_led_suspend(struct platform_device *dev, pm_message_t state)

{

struct s3c24xx_gpio_led *led = pdev_to_gpio(dev);  

led_classdev_suspend(&led->cdev);

return ;

}  

static int s3c24xx_led_resume(struct platform_device *dev)

{

struct s3c24xx_gpio_led *led = pdev_to_gpio(dev);  

led_classdev_resume(&led->cdev);

return ;

}

#else

#define s3c24xx_led_suspend NULL

#define s3c24xx_led_resume NULL

#endif  

static struct platform_driver s3c24xx_led_driver = {

.probe = s3c24xx_led_probe,

.remove = s3c24xx_led_remove,

.suspend = s3c24xx_led_suspend,

.resume = s3c24xx_led_resume,

.driver = {

.name = "s3c24xx_led",

.owner = THIS_MODULE,

},

};  

static int __init s3c24xx_led_init(void)

{

return platform_driver_register(&s3c24xx_led_driver);

}  

static void __exit s3c24xx_led_exit(void)

{

platform_driver_unregister(&s3c24xx_led_driver);

}  

module_init(s3c24xx_led_init);

module_exit(s3c24xx_led_exit);  

MODULE_AUTHOR("Ben Dooks <ben@simtec.co.uk>");

MODULE_DESCRIPTION("S3C24XX LED driver");

MODULE_LICENSE("GPL");

MODULE_ALIAS("platform:s3c24xx_led");  

 #include <asm/uaccess.h>

  #include <asm/atomic.h>

  #include <asm/unistd.h>   

  #define DEVICE_NAME "leds"   

  static unsigned long led_table [] = {

  S3C2410_GPB5,   

  S3C2410_GPB6,

  S3C2410_GPB7,

  S3C2410_GPB8,

};   

static unsigned int led_cfg_table [] = {

  S3C2410_GPB5_OUTP,   

  S3C2410_GPB6_OUTP,

  S3C2410_GPB7_OUTP,

  S3C2410_GPB8_OUTP,

};   

static int sbc2440_leds_ioctl(

  struct inode *inode,

  struct file *file,

  unsigned int cmd,

  unsigned long arg)

{

  switch(cmd) {

  case :

  case :

  if (arg > ) {

  return -EINVAL;

  }

  s3c2410_gpio_setpin(led_table[arg], !cmd);

  return ;

  default:

  return -EINVAL;

  }

}   

static struct file_operations dev_fops = {

  .owner = THIS_MODULE,

  .ioctl = sbc2440_leds_ioctl,

};   

static struct miscdevice misc = {

  .minor = MISC_DYNAMIC_MINOR,

  .name = DEVICE_NAME,

  .fops = &dev_fops,

};   

static int __init dev_init(void)

  {

  int ret;   

  int i;   

  for (i = ; i < ; i++) {

  s3c2410_gpio_cfgpin(led_table[i], led_cfg_table[i]);

  s3c2410_gpio_setpin(led_table[i], );

  }   

  ret = misc_register(&misc);   

  printk (DEVICE_NAME"\tinitialized\n");   

  return ret;

}   

static void __exit dev_exit(void)

{

  misc_deregister(&misc);

}   

module_init(dev_init);

module_exit(dev_exit);

MODULE_LICENSE("GPL");

MODULE_AUTHOR("FriendlyARM Inc.");