arch/mips/vr41xx/common/rtc.c

   1 /*
   2  *  NEC VR4100 series 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/platform_device.h>
  24
  25 #include <asm/cpu.h>
  26 #include <asm/vr41xx/irq.h>
  27
  28 static struct resource rtc_type1_resource[] __initdata = {
  29         {
  30                 .start  = 0x0b0000c0,
  31                 .end    = 0x0b0000df,
  32                 .flags  = IORESOURCE_MEM,
  33         },
  34         {
  35                 .start  = 0x0b0001c0,
  36                 .end    = 0x0b0001df,
  37                 .flags  = IORESOURCE_MEM,
  38         },
  39         {
  40                 .start  = ELAPSEDTIME_IRQ,
  41                 .end    = ELAPSEDTIME_IRQ,
  42                 .flags  = IORESOURCE_IRQ,
  43         },
  44         {
  45                 .start  = RTCLONG1_IRQ,
  46                 .end    = RTCLONG1_IRQ,
  47                 .flags  = IORESOURCE_IRQ,
  48         },
  49 };
  50
  51 static struct resource rtc_type2_resource[] __initdata = {
  52         {
  53                 .start  = 0x0f000100,
  54                 .end    = 0x0f00011f,
  55                 .flags  = IORESOURCE_MEM,
  56         },
  57         {
  58                 .start  = 0x0f000120,
  59                 .end    = 0x0f00013f,
  60                 .flags  = IORESOURCE_MEM,
  61         },
  62         {
  63                 .start  = ELAPSEDTIME_IRQ,
  64                 .end    = ELAPSEDTIME_IRQ,
  65                 .flags  = IORESOURCE_IRQ,
  66         },
  67         {
  68                 .start  = RTCLONG1_IRQ,
  69                 .end    = RTCLONG1_IRQ,
  70                 .flags  = IORESOURCE_IRQ,
  71         },
  72 };
  73
  74 static int __init vr41xx_rtc_add(void)
  75 {
  76         struct platform_device *pdev;
  77         struct resource *res;
  78         unsigned int num;
  79         int retval;
  80
  81         pdev = platform_device_alloc("RTC", -1);
  82         if (!pdev)
  83                 return -ENOMEM;
  84
  85         switch (current_cpu_type()) {
  86         case CPU_VR4111:
  87         case CPU_VR4121:
  88                 res = rtc_type1_resource;
  89                 num = ARRAY_SIZE(rtc_type1_resource);
  90                 break;
  91         case CPU_VR4122:
  92         case CPU_VR4131:
  93         case CPU_VR4133:
  94                 res = rtc_type2_resource;
  95                 num = ARRAY_SIZE(rtc_type2_resource);
  96                 break;
  97         default:
  98                 retval = -ENODEV;
  99                 goto err_free_device;
 100         }
 101
 102         retval = platform_device_add_resources(pdev, res, num);
 103         if (retval)
 104                 goto err_free_device;
 105
 106         retval = platform_device_add(pdev);
 107         if (retval)
 108                 goto err_free_device;
 109
 110         return 0;
 111
 112 err_free_device:
 113         platform_device_put(pdev);
 114
 115         return retval;
 116 }
 117 device_initcall(vr41xx_rtc_add);