include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit...
[linux-3.10.git] / arch / powerpc / sysdev / of_rtc.c
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>
14 #include <linux/of_platform.h>
15 #include <linux/slab.h>
16
17 static __initdata struct {
18         const char *compatible;
19         char *plat_name;
20 } of_rtc_table[] = {
21         { "ds1743-nvram", "rtc-ds1742" },
22 };
23
24 void __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 }