blob: f0929934bb7ac0c8a5d0dca4dbb197fb4700b6d3 [file] [log] [blame]
* 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)
dev->dev.of_node = of_pci_find_child_device(dev->bus->dev.of_node,
void pci_release_of_node(struct pci_dev *dev)
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);
bus->dev.of_node = of_node_get(bus->self->dev.of_node);
void pci_release_bus_of_node(struct pci_bus *bus)
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 && bus->bridge->parent->of_node)
return of_node_get(bus->bridge->parent->of_node);
return NULL;