2 * PCI <-> OF mapping helpers
4 * Copyright 2011 IBM Corp.
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.
12 #include <linux/kernel.h>
13 #include <linux/pci.h>
15 #include <linux/of_pci.h>
18 void pci_set_of_node(struct pci_dev
*dev
)
20 if (!dev
->bus
->dev
.of_node
)
22 dev
->dev
.of_node
= of_pci_find_child_device(dev
->bus
->dev
.of_node
,
26 void pci_release_of_node(struct pci_dev
*dev
)
28 of_node_put(dev
->dev
.of_node
);
29 dev
->dev
.of_node
= NULL
;
32 void pci_set_bus_of_node(struct pci_bus
*bus
)
34 if (bus
->self
== NULL
)
35 bus
->dev
.of_node
= pcibios_get_phb_of_node(bus
);
37 bus
->dev
.of_node
= of_node_get(bus
->self
->dev
.of_node
);
40 void pci_release_bus_of_node(struct pci_bus
*bus
)
42 of_node_put(bus
->dev
.of_node
);
43 bus
->dev
.of_node
= NULL
;
46 struct device_node
* __weak
pcibios_get_phb_of_node(struct pci_bus
*bus
)
48 /* This should only be called for PHBs */
49 if (WARN_ON(bus
->self
|| bus
->parent
))
52 /* Look for a node pointer in either the intermediary device we
53 * create above the root bus or it's own parent. Normally only
54 * the later is populated.
56 if (bus
->bridge
->of_node
)
57 return of_node_get(bus
->bridge
->of_node
);
58 if (bus
->bridge
->parent
&& bus
->bridge
->parent
->of_node
)
59 return of_node_get(bus
->bridge
->parent
->of_node
);
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