arch/mips/cobalt/rtc.c

   1 /*
   2  *  Registration of Cobalt RTC platform device.
   3  *
   4  *  Copyright (C) 2007  Yoichi Yuasa <yuasa@linux-mips.org>
   5  *
   6  *  This program is free software; you can redistribute it and/or modify
   7  *  it under the terms of the GNU General Public License as published by
   8  *  the Free Software Foundation; either version 2 of the License, or
   9  *  (at your option) any later version.
  10  *
  11  *  This program is distributed in the hope that it will be useful,
  12  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  *  GNU General Public License for more details.
  15  *
  16  *  You should have received a copy of the GNU General Public License
  17  *  along with this program; if not, write to the Free Software
  18  *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
  19  */
  20 #include <linux/errno.h>
  21 #include <linux/init.h>
  22 #include <linux/ioport.h>
  23 #include <linux/mc146818rtc.h>
  24 #include <linux/platform_device.h>
  25
  26 static struct resource cobalt_rtc_resource[] __initdata = {
  27         {
  28                 .start  = 0x70,
  29                 .end    = 0x77,
  30                 .flags  = IORESOURCE_IO,
  31         },
  32         {
  33                 .start  = RTC_IRQ,
  34                 .end    = RTC_IRQ,
  35                 .flags  = IORESOURCE_IRQ,
  36         },
  37 };
  38
  39 static __init int cobalt_rtc_add(void)
  40 {
  41         struct platform_device *pdev;
  42         int retval;
  43
  44         pdev = platform_device_alloc("rtc_cmos", -1);
  45         if (!pdev)
  46                 return -ENOMEM;
  47
  48         retval = platform_device_add_resources(pdev, cobalt_rtc_resource,
  49                                                ARRAY_SIZE(cobalt_rtc_resource));
  50         if (retval)
  51                 goto err_free_device;
  52
  53         retval = platform_device_add(pdev);
  54         if (retval)
  55                 goto err_free_device;
  56
  57         return 0;
  58
  59 err_free_device:
  60         platform_device_put(pdev);
  61
  62         return retval;
  63 }
  64 device_initcall(cobalt_rtc_add);