arch/mips/vr41xx/common/rtc.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  *  NEC VR4100 series RTC platform device.
   4  *
   5  *  Copyright (C) 2007  Yoichi Yuasa <yuasa@linux-mips.org>
   6  */
   7 #include <linux/errno.h>
   8 #include <linux/init.h>
   9 #include <linux/smp.h>
  10 #include <linux/ioport.h>
  11 #include <linux/platform_device.h>
  12
  13 #include <asm/cpu.h>
  14 #include <asm/vr41xx/irq.h>
  15
  16 static struct resource rtc_type1_resource[] __initdata = {
  17         {
  18                 .start  = 0x0b0000c0,
  19                 .end    = 0x0b0000df,
  20                 .flags  = IORESOURCE_MEM,
  21         },
  22         {
  23                 .start  = 0x0b0001c0,
  24                 .end    = 0x0b0001df,
  25                 .flags  = IORESOURCE_MEM,
  26         },
  27         {
  28                 .start  = ELAPSEDTIME_IRQ,
  29                 .end    = ELAPSEDTIME_IRQ,
  30                 .flags  = IORESOURCE_IRQ,
  31         },
  32         {
  33                 .start  = RTCLONG1_IRQ,
  34                 .end    = RTCLONG1_IRQ,
  35                 .flags  = IORESOURCE_IRQ,
  36         },
  37 };
  38
  39 static struct resource rtc_type2_resource[] __initdata = {
  40         {
  41                 .start  = 0x0f000100,
  42                 .end    = 0x0f00011f,
  43                 .flags  = IORESOURCE_MEM,
  44         },
  45         {
  46                 .start  = 0x0f000120,
  47                 .end    = 0x0f00013f,
  48                 .flags  = IORESOURCE_MEM,
  49         },
  50         {
  51                 .start  = ELAPSEDTIME_IRQ,
  52                 .end    = ELAPSEDTIME_IRQ,
  53                 .flags  = IORESOURCE_IRQ,
  54         },
  55         {
  56                 .start  = RTCLONG1_IRQ,
  57                 .end    = RTCLONG1_IRQ,
  58                 .flags  = IORESOURCE_IRQ,
  59         },
  60 };
  61
  62 static int __init vr41xx_rtc_add(void)
  63 {
  64         struct platform_device *pdev;
  65         struct resource *res;
  66         unsigned int num;
  67         int retval;
  68
  69         pdev = platform_device_alloc("RTC", -1);
  70         if (!pdev)
  71                 return -ENOMEM;
  72
  73         switch (current_cpu_type()) {
  74         case CPU_VR4111:
  75         case CPU_VR4121:
  76                 res = rtc_type1_resource;
  77                 num = ARRAY_SIZE(rtc_type1_resource);
  78                 break;
  79         case CPU_VR4122:
  80         case CPU_VR4131:
  81         case CPU_VR4133:
  82                 res = rtc_type2_resource;
  83                 num = ARRAY_SIZE(rtc_type2_resource);
  84                 break;
  85         default:
  86                 retval = -ENODEV;
  87                 goto err_free_device;
  88         }
  89
  90         retval = platform_device_add_resources(pdev, res, num);
  91         if (retval)
  92                 goto err_free_device;
  93
  94         retval = platform_device_add(pdev);
  95         if (retval)
  96                 goto err_free_device;
  97
  98         return 0;
  99
 100 err_free_device:
 101         platform_device_put(pdev);
 102
 103         return retval;
 104 }
 105 device_initcall(vr41xx_rtc_add);