Linux Kernel  3.7.1
 All Data Structures Namespaces Files Functions Variables Typedefs Enumerations Enumerator Macros Groups Pages
rtc.c
Go to the documentation of this file.
1 /*
2  * NEC VR4100 series RTC platform device.
3  *
4  * Copyright (C) 2007 Yoichi Yuasa <[email protected]>
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);