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