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12e84142 MS |
1 | /* |
2 | * Copyright (C) 2006 Benjamin Herrenschmidt, IBM Corp. | |
3 | * <benh@kernel.crashing.org> | |
4 | * and Arnd Bergmann, IBM Corp. | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or | |
7 | * modify it under the terms of the GNU General Public License | |
8 | * as published by the Free Software Foundation; either version | |
9 | * 2 of the License, or (at your option) any later version. | |
10 | * | |
11 | */ | |
12 | ||
13 | #undef DEBUG | |
14 | ||
15 | #include <linux/string.h> | |
16 | #include <linux/kernel.h> | |
17 | #include <linux/init.h> | |
18 | #include <linux/module.h> | |
19 | #include <linux/mod_devicetable.h> | |
12e84142 MS |
20 | #include <linux/pci.h> |
21 | #include <linux/of.h> | |
22 | #include <linux/of_device.h> | |
23 | #include <linux/of_platform.h> | |
24 | ||
25 | #include <linux/errno.h> | |
26 | #include <linux/topology.h> | |
27 | #include <asm/atomic.h> | |
28 | ||
5fd200f3 GL |
29 | /* |
30 | * The list of OF IDs below is used for matching bus types in the | |
31 | * system whose devices are to be exposed as of_platform_devices. | |
12e84142 | 32 | * |
5fd200f3 GL |
33 | * This is the default list valid for most platforms. This file provides |
34 | * functions who can take an explicit list if necessary though | |
35 | * | |
36 | * The search is always performed recursively looking for children of | |
37 | * the provided device_node and recursively if such a children matches | |
38 | * a bus type in the list | |
12e84142 MS |
39 | */ |
40 | ||
5fd200f3 GL |
41 | const struct of_device_id of_default_bus_ids[] = { |
42 | { .type = "soc", }, | |
43 | { .compatible = "soc", }, | |
44 | { .type = "plb5", }, | |
45 | { .type = "plb4", }, | |
46 | { .type = "opb", }, | |
47 | { .type = "simple", }, | |
48 | {}, | |
49 | }; | |
12e84142 MS |
50 | |
51 | static int of_dev_node_match(struct device *dev, void *data) | |
52 | { | |
61c7a080 | 53 | return to_of_device(dev)->dev.of_node == data; |
12e84142 MS |
54 | } |
55 | ||
56 | struct of_device *of_find_device_by_node(struct device_node *np) | |
57 | { | |
58 | struct device *dev; | |
59 | ||
60 | dev = bus_find_device(&of_platform_bus_type, | |
61 | NULL, np, of_dev_node_match); | |
62 | if (dev) | |
63 | return to_of_device(dev); | |
64 | return NULL; | |
65 | } | |
66 | EXPORT_SYMBOL(of_find_device_by_node); |