linux/arch/mips/vr41xx/common/rtc.c
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   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
  28static 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
  51static 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
  74static 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
 112err_free_device:
 113        platform_device_put(pdev);
 114
 115        return retval;
 116}
 117device_initcall(vr41xx_rtc_add);
 118