LXR linux/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
  29static 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
  52static 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
  75static 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
 113err_free_device:
 114        platform_device_put(pdev);
 115
 116        return retval;
 117}
 118device_initcall(vr41xx_rtc_add);
 119