of: of_pci.c needs export.h since it uses EXPORT_SYMBOLS
[linux-3.10.git] / drivers / of / of_pci.c
1 #include <linux/kernel.h>
2 #include <linux/export.h>
3 #include <linux/of.h>
4 #include <linux/of_pci.h>
5 #include <asm/prom.h>
6
7 static inline int __of_pci_pci_compare(struct device_node *node,
8                                        unsigned int devfn)
9 {
10         unsigned int size;
11         const __be32 *reg = of_get_property(node, "reg", &size);
12
13         if (!reg || size < 5 * sizeof(__be32))
14                 return 0;
15         return ((be32_to_cpup(&reg[0]) >> 8) & 0xff) == devfn;
16 }
17
18 struct device_node *of_pci_find_child_device(struct device_node *parent,
19                                              unsigned int devfn)
20 {
21         struct device_node *node, *node2;
22
23         for_each_child_of_node(parent, node) {
24                 if (__of_pci_pci_compare(node, devfn))
25                         return node;
26                 /*
27                  * Some OFs create a parent node "multifunc-device" as
28                  * a fake root for all functions of a multi-function
29                  * device we go down them as well.
30                  */
31                 if (!strcmp(node->name, "multifunc-device")) {
32                         for_each_child_of_node(node, node2) {
33                                 if (__of_pci_pci_compare(node2, devfn)) {
34                                         of_node_put(node);
35                                         return node2;
36                                 }
37                         }
38                 }
39         }
40         return NULL;
41 }
42 EXPORT_SYMBOL_GPL(of_pci_find_child_device);