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x86/devicetree: Use generic PCI <-> OF matching

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Instead of walking the whole PCI tree to update the of_node's for
PCI busses and devices after the fact, enable the new generic core
code for doing so by providing the proper device nodes for the
PCI host bridges

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Acked-by: Grant Likely <grant.likely@secretlab.ca>
Tested-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
This commit is contained in:
Benjamin Herrenschmidt 2011-04-11 11:19:09 +10:00
parent bf13a6fa09
commit 3d5fe5a65a
1 changed files with 18 additions and 42 deletions
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60
arch/x86/kernel/devicetree.c
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@ -123,6 +123,24 @@ static int __init add_bus_probe(void)
module_init(add_bus_probe);
#ifdef CONFIG_PCI
struct device_node *pcibios_get_phb_of_node(struct pci_bus *bus)
{
struct device_node *np;
for_each_node_by_type(np, "pci") {
const void *prop;
unsigned int bus_min;
prop = of_get_property(np, "bus-range", NULL);
if (!prop)
continue;
bus_min = be32_to_cpup(prop);
if (bus->number == bus_min)
return np;
}
return NULL;
}
static int x86_of_pci_irq_enable(struct pci_dev *dev)
{
struct of_irq oirq;
@ -154,50 +172,8 @@ static void x86_of_pci_irq_disable(struct pci_dev *dev)
void __cpuinit x86_of_pci_init(void)
{
struct device_node *np;
pcibios_enable_irq = x86_of_pci_irq_enable;
pcibios_disable_irq = x86_of_pci_irq_disable;
for_each_node_by_type(np, "pci") {
const void *prop;
struct pci_bus *bus;
unsigned int bus_min;
struct device_node *child;
prop = of_get_property(np, "bus-range", NULL);
if (!prop)
continue;
bus_min = be32_to_cpup(prop);
bus = pci_find_bus(0, bus_min);
if (!bus) {
printk(KERN_ERR "Can't find a node for bus %s.\n",
np->full_name);
continue;
}
if (bus->self)
bus->self->dev.of_node = np;
else
bus->dev.of_node = np;
for_each_child_of_node(np, child) {
struct pci_dev *dev;
u32 devfn;
prop = of_get_property(child, "reg", NULL);
if (!prop)
continue;
devfn = (be32_to_cpup(prop) >> 8) & 0xff;
dev = pci_get_slot(bus, devfn);
if (!dev)
continue;
dev->dev.of_node = child;
pci_dev_put(dev);
}
}
}
#endif