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rtc.c

/*
 *  NEC VR4100 series RTC platform device.
 *
 *  Copyright (C) 2007  Yoichi Yuasa <yoichi_yuasa@tripeaks.co.jp>
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 */
#include <linux/errno.h>
#include <linux/init.h>
#include <linux/ioport.h>
#include <linux/platform_device.h>

#include <asm/cpu.h>
#include <asm/vr41xx/irq.h>

static struct resource rtc_type1_resource[] __initdata = {
      {
            .start      = 0x0b0000c0,
            .end  = 0x0b0000df,
            .flags      = IORESOURCE_MEM,
      },
      {
            .start      = 0x0b0001c0,
            .end  = 0x0b0001df,
            .flags      = IORESOURCE_MEM,
      },
      {
            .start      = ELAPSEDTIME_IRQ,
            .end  = ELAPSEDTIME_IRQ,
            .flags      = IORESOURCE_IRQ,
      },
      {
            .start      = RTCLONG1_IRQ,
            .end  = RTCLONG1_IRQ,
            .flags      = IORESOURCE_IRQ,
      },
};

static struct resource rtc_type2_resource[] __initdata = {
      {
            .start      = 0x0f000100,
            .end  = 0x0f00011f,
            .flags      = IORESOURCE_MEM,
      },
      {
            .start      = 0x0f000120,
            .end  = 0x0f00013f,
            .flags      = IORESOURCE_MEM,
      },
      {
            .start      = ELAPSEDTIME_IRQ,
            .end  = ELAPSEDTIME_IRQ,
            .flags      = IORESOURCE_IRQ,
      },
      {
            .start      = RTCLONG1_IRQ,
            .end  = RTCLONG1_IRQ,
            .flags      = IORESOURCE_IRQ,
      },
};

static int __init vr41xx_rtc_add(void)
{
      struct platform_device *pdev;
      struct resource *res;
      unsigned int num;
      int retval;

      pdev = platform_device_alloc("RTC", -1);
      if (!pdev)
            return -ENOMEM;

      switch (current_cpu_type()) {
      case CPU_VR4111:
      case CPU_VR4121:
            res = rtc_type1_resource;
            num = ARRAY_SIZE(rtc_type1_resource);
            break;
      case CPU_VR4122:
      case CPU_VR4131:
      case CPU_VR4133:
            res = rtc_type2_resource;
            num = ARRAY_SIZE(rtc_type2_resource);
            break;
      default:
            retval = -ENODEV;
            goto err_free_device;
      }

      retval = platform_device_add_resources(pdev, res, num);
      if (retval)
            goto err_free_device;

      retval = platform_device_add(pdev);
      if (retval)
            goto err_free_device;

      return 0;

err_free_device:
      platform_device_put(pdev);

      return retval;
}
device_initcall(vr41xx_rtc_add);

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