/* rtc-starfire.c: Starfire platform RTC driver.
   *
   * Copyright (C) 2008 David S. Miller <davem@davemloft.net>
   */
  
  #include <linux/kernel.h>
  #include <linux/module.h>
  #include <linux/init.h>

  #include <linux/rtc.h>
  #include <linux/platform_device.h>
  
  #include <asm/oplib.h>
  
  MODULE_AUTHOR("David S. Miller <davem@davemloft.net>");
  MODULE_DESCRIPTION("Starfire RTC driver");
  MODULE_LICENSE("GPL");

  static u32 starfire_get_time(void)
  {
  	static char obp_gettod[32];
  	static u32 unix_tod;
  
  	sprintf(obp_gettod, "h# %08x unix-gettod",
  		(unsigned int) (long) &unix_tod);
  	prom_feval(obp_gettod);
  
  	return unix_tod;
  }
  
  static int starfire_read_time(struct device *dev, struct rtc_time *tm)
  {

  	rtc_time_to_tm(starfire_get_time(), tm);
  	return rtc_valid_tm(tm);

  }
  
  static const struct rtc_class_ops starfire_rtc_ops = {
  	.read_time	= starfire_read_time,

  };

  static int __init starfire_rtc_probe(struct platform_device *pdev)

  {

  	struct rtc_device *rtc = rtc_device_register("starfire", &pdev->dev,
  				     &starfire_rtc_ops, THIS_MODULE);
  	if (IS_ERR(rtc))
  		return PTR_ERR(rtc);

  	platform_set_drvdata(pdev, rtc);

  	return 0;
  }

  static int __exit starfire_rtc_remove(struct platform_device *pdev)

  {

  	struct rtc_device *rtc = platform_get_drvdata(pdev);

  	rtc_device_unregister(rtc);

  
  	return 0;
  }
  
  static struct platform_driver starfire_rtc_driver = {
  	.driver		= {
  		.name	= "rtc-starfire",
  		.owner	= THIS_MODULE,
  	},

  	.remove		= __exit_p(starfire_rtc_remove),

  };
  
  static int __init starfire_rtc_init(void)
  {

  	return platform_driver_probe(&starfire_rtc_driver, starfire_rtc_probe);

  }
  
  static void __exit starfire_rtc_exit(void)
  {
  	platform_driver_unregister(&starfire_rtc_driver);
  }
  
  module_init(starfire_rtc_init);
  module_exit(starfire_rtc_exit);