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leds-h1940.c

/*
 * drivers/leds/leds-h1940.c
 * Copyright (c) Arnaud Patard <arnaud.patard@rtp-net.org>
 *
 * This file is subject to the terms and conditions of the GNU General Public
 * License.  See the file COPYING in the main directory of this archive for
 * more details.
 *
 * H1940 leds driver
 *
 */

#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/delay.h>
#include <linux/string.h>
#include <linux/ctype.h>
#include <linux/leds.h>
#include <asm/arch/regs-gpio.h>
#include <asm/hardware.h>
#include <asm/arch/h1940-latch.h>

/*
 * Green led.
 */
void h1940_greenled_set(struct led_classdev *led_dev, enum led_brightness value)
{
      switch (value) {
            case LED_HALF:
                  h1940_latch_control(0,H1940_LATCH_LED_FLASH);
                  s3c2410_gpio_setpin(S3C2410_GPA7,1);
                  break;
            case LED_FULL:
                  h1940_latch_control(0,H1940_LATCH_LED_GREEN);
                  s3c2410_gpio_setpin(S3C2410_GPA7,1);
                  break;
            default:
            case LED_OFF:
                  h1940_latch_control(H1940_LATCH_LED_FLASH,0);
                  h1940_latch_control(H1940_LATCH_LED_GREEN,0);
                  s3c2410_gpio_setpin(S3C2410_GPA7,0);
                  break;
      }
}

static struct led_classdev h1940_greenled = {
      .name             = "h1940:green",
      .brightness_set         = h1940_greenled_set,
      .default_trigger  = "h1940-charger",
};

/*
 * Red led.
 */
void h1940_redled_set(struct led_classdev *led_dev, enum led_brightness value)
{
      switch (value) {
            case LED_HALF:
                  h1940_latch_control(0,H1940_LATCH_LED_FLASH);
                  s3c2410_gpio_setpin(S3C2410_GPA1,1);
                  break;
            case LED_FULL:
                  h1940_latch_control(0,H1940_LATCH_LED_RED);
                  s3c2410_gpio_setpin(S3C2410_GPA1,1);
                  break;
            default:
            case LED_OFF:
                  h1940_latch_control(H1940_LATCH_LED_FLASH,0);
                  h1940_latch_control(H1940_LATCH_LED_RED,0);
                  s3c2410_gpio_setpin(S3C2410_GPA1,0);
                  break;
      }
}

static struct led_classdev h1940_redled = {
      .name             = "h1940:red",
      .brightness_set         = h1940_redled_set,
      .default_trigger  = "h1940-charger",
};

/*
 * Blue led.
 * (it can only be blue flashing led)
 */
void h1940_blueled_set(struct led_classdev *led_dev, enum led_brightness value)
{
      if (value) {
            /* flashing Blue */
            h1940_latch_control(0,H1940_LATCH_LED_FLASH);
            s3c2410_gpio_setpin(S3C2410_GPA3,1);
      } else {
            h1940_latch_control(H1940_LATCH_LED_FLASH,0);
            s3c2410_gpio_setpin(S3C2410_GPA3,0);
      }

}

static struct led_classdev h1940_blueled = {
      .name             = "h1940:blue",
      .brightness_set         = h1940_blueled_set,
      .default_trigger  = "h1940-bluetooth",
};

static int __init h1940leds_probe(struct platform_device *pdev)
{
      int ret;

      ret = led_classdev_register(&pdev->dev, &h1940_greenled);
      if (ret)
            goto err_green;

      ret = led_classdev_register(&pdev->dev, &h1940_redled);
      if (ret)
            goto err_red;

      ret = led_classdev_register(&pdev->dev, &h1940_blueled);
      if (ret)
            goto err_blue;

      return 0;

err_blue:
      led_classdev_unregister(&h1940_redled);
err_red:
      led_classdev_unregister(&h1940_greenled);
err_green:
      return ret;
}

static int h1940leds_remove(struct platform_device *pdev)
{
      led_classdev_unregister(&h1940_greenled);
      led_classdev_unregister(&h1940_redled);
      led_classdev_unregister(&h1940_blueled);
      return 0;
}


static struct platform_driver h1940leds_driver = {
      .driver           = {
            .name = "h1940-leds",
      },
      .probe            = h1940leds_probe,
      .remove           = h1940leds_remove,
};


static int __init h1940leds_init(void)
{
      return platform_driver_register(&h1940leds_driver);
}

static void __exit h1940leds_exit(void)
{
      platform_driver_unregister(&h1940leds_driver);
}

module_init(h1940leds_init);
module_exit(h1940leds_exit);

MODULE_AUTHOR("Arnaud Patard <arnaud.patard@rtp-net.org>");
MODULE_DESCRIPTION("LED driver for the iPAQ H1940");
MODULE_LICENSE("GPL");

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