blob: c94d37ec55c87af38e7b6d1c9ccf46ea9baeb60c (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
|
/*
* PCI <-> OF mapping helpers
*
* Copyright 2011 IBM Corp.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version
* 2 of the License, or (at your option) any later version.
*/
#include <linux/kernel.h>
#include <linux/pci.h>
#include <linux/of.h>
#include <linux/of_pci.h>
#include "pci.h"
void pci_set_of_node(struct pci_dev *dev)
{
if (!dev->bus->dev.of_node)
return;
dev->dev.of_node = of_pci_find_child_device(dev->bus->dev.of_node,
dev->devfn);
}
void pci_release_of_node(struct pci_dev *dev)
{
of_node_put(dev->dev.of_node);
dev->dev.of_node = NULL;
}
void pci_set_bus_of_node(struct pci_bus *bus)
{
if (bus->self == NULL)
bus->dev.of_node = pcibios_get_phb_of_node(bus);
else
bus->dev.of_node = of_node_get(bus->self->dev.of_node);
}
void pci_release_bus_of_node(struct pci_bus *bus)
{
of_node_put(bus->dev.of_node);
bus->dev.of_node = NULL;
}
struct device_node * __weak pcibios_get_phb_of_node(struct pci_bus *bus)
{
/* This should only be called for PHBs */
if (WARN_ON(bus->self || bus->parent))
return NULL;
/* Look for a node pointer in either the intermediary device we
* create above the root bus or it's own parent. Normally only
* the later is populated.
*/
if (bus->bridge->of_node)
return of_node_get(bus->bridge->of_node);
if (bus->bridge->parent->of_node)
return of_node_get(bus->bridge->parent->of_node);
return NULL;
}
|
