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 * Setup code for PC-style Real-Time Clock.
 * Author: Wade Farnsworth <wfarnsworth@mvista.com>
 * 2007 (c) MontaVista Software, Inc. This file is licensed under
 * the terms of the GNU General Public License version 2. This program
 * is licensed "as is" without any warranty of any kind, whether express
 * or implied.

#include <linux/platform_device.h>
#include <linux/err.h>
#include <linux/init.h>
#include <linux/mc146818rtc.h>

#include <asm/prom.h>

static int  __init add_rtc(void)
      struct device_node *np;
      struct platform_device *pd;
      struct resource res[2];
      int ret;

      memset(&res, 0, sizeof(res));

      np = of_find_compatible_node(NULL, NULL, "pnpPNP,b00");
      if (!np)
            return -ENODEV;

      ret = of_address_to_resource(np, 0, &res[0]);
      if (ret)
            return ret;

       * RTC_PORT(x) is hardcoded in asm/mc146818rtc.h.  Verify that the
       * address provided by the device node matches.
      if (res[0].start != RTC_PORT(0))
            return -EINVAL;

      /* Use a fixed interrupt value of 8 since on PPC if we are using this
       * its off an i8259 which we ensure has interrupt numbers 0..15. */
      res[1].start = 8;
      res[1].end = 8;
      res[1].flags = IORESOURCE_IRQ;

      pd = platform_device_register_simple("rtc_cmos", -1,
                                   &res[0], 2);

      if (IS_ERR(pd))
            return PTR_ERR(pd);

      return 0;

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