rtc.c revision bd0765098bf22eb8b1319f649a4c3301b40ec04c 
1/*
2 *  NEC VR4100 series RTC platform device.
3 *
4 *  Copyright (C) 2007  Yoichi Yuasa <yoichi_yuasa@tripeaks.co.jp>
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_data.cputype) {
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