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David Gibson22258fa2008-01-11 14:25:34 +11001/*
2 * Instantiate mmio-mapped RTC chips based on device tree information
3 *
4 * Copyright 2007 David Gibson <dwg@au1.ibm.com>, IBM Corporation.
5 *
6 * This program is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License as published by the
8 * Free Software Foundation; either version 2 of the License, or (at your
9 * option) any later version.
10 */
11#include <linux/kernel.h>
12#include <linux/of.h>
13#include <linux/init.h>
14#include <linux/of_platform.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090015#include <linux/slab.h>
David Gibson22258fa2008-01-11 14:25:34 +110016
17static __initdata struct {
18 const char *compatible;
19 char *plat_name;
20} of_rtc_table[] = {
21 { "ds1743-nvram", "rtc-ds1742" },
22};
23
24void __init of_instantiate_rtc(void)
25{
26 struct device_node *node;
27 int err;
28 int i;
29
30 for (i = 0; i < ARRAY_SIZE(of_rtc_table); i++) {
31 char *plat_name = of_rtc_table[i].plat_name;
32
33 for_each_compatible_node(node, NULL,
34 of_rtc_table[i].compatible) {
35 struct resource *res;
36
37 res = kmalloc(sizeof(*res), GFP_KERNEL);
38 if (!res) {
39 printk(KERN_ERR "OF RTC: Out of memory "
40 "allocating resource structure for %s\n",
41 node->full_name);
42 continue;
43 }
44
45 err = of_address_to_resource(node, 0, res);
46 if (err) {
47 printk(KERN_ERR "OF RTC: Error "
48 "translating resources for %s\n",
49 node->full_name);
50 continue;
51 }
52
53 printk(KERN_INFO "OF_RTC: %s is a %s @ 0x%llx-0x%llx\n",
54 node->full_name, plat_name,
55 (unsigned long long)res->start,
56 (unsigned long long)res->end);
57 platform_device_register_simple(plat_name, -1, res, 1);
58 }
59 }
60}