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22258fa4 DG |
1 | /* |
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> | |
26a2056e | 14 | #include <linux/of_address.h> |
22258fa4 | 15 | #include <linux/of_platform.h> |
5a0e3ad6 | 16 | #include <linux/slab.h> |
22258fa4 DG |
17 | |
18 | static __initdata struct { | |
19 | const char *compatible; | |
20 | char *plat_name; | |
21 | } of_rtc_table[] = { | |
22 | { "ds1743-nvram", "rtc-ds1742" }, | |
23 | }; | |
24 | ||
25 | void __init of_instantiate_rtc(void) | |
26 | { | |
27 | struct device_node *node; | |
28 | int err; | |
29 | int i; | |
30 | ||
31 | for (i = 0; i < ARRAY_SIZE(of_rtc_table); i++) { | |
32 | char *plat_name = of_rtc_table[i].plat_name; | |
33 | ||
34 | for_each_compatible_node(node, NULL, | |
35 | of_rtc_table[i].compatible) { | |
36 | struct resource *res; | |
37 | ||
38 | res = kmalloc(sizeof(*res), GFP_KERNEL); | |
39 | if (!res) { | |
40 | printk(KERN_ERR "OF RTC: Out of memory " | |
41 | "allocating resource structure for %s\n", | |
42 | node->full_name); | |
43 | continue; | |
44 | } | |
45 | ||
46 | err = of_address_to_resource(node, 0, res); | |
47 | if (err) { | |
48 | printk(KERN_ERR "OF RTC: Error " | |
49 | "translating resources for %s\n", | |
50 | node->full_name); | |
51 | continue; | |
52 | } | |
53 | ||
54 | printk(KERN_INFO "OF_RTC: %s is a %s @ 0x%llx-0x%llx\n", | |
55 | node->full_name, plat_name, | |
56 | (unsigned long long)res->start, | |
57 | (unsigned long long)res->end); | |
58 | platform_device_register_simple(plat_name, -1, res, 1); | |
59 | } | |
60 | } | |
61 | } |