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powerpc/powernv: Fetch PHB bus range from dev-tree 

The patch enables fetching bus range from device-tree for the
specific PHB. If we can't get that from device-tree, the default
range [0 255] will be used.

Signed-off-by: Gavin Shan <shangw@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
This commit is contained in:
Gavin Shan 2013-07-31 16:47:01 +08:00 committed by Benjamin Herrenschmidt
parent 58d714ec7a
commit f1b7cc3ec1
1 changed files with 10 additions and 3 deletions
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13
arch/powerpc/platforms/powernv/pci-ioda.c
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@ -1109,6 +1109,7 @@ void __init pnv_pci_init_ioda_phb(struct device_node *np,
unsigned long size, m32map_off, iomap_off, pemap_off;
const u64 *prop64;
const u32 *prop32;
int len;
u64 phb_id;
void *aux;
long rc;
@ -1140,9 +1141,15 @@ void __init pnv_pci_init_ioda_phb(struct device_node *np,
}
spin_lock_init(&phb->lock);
/* XXX Use device-tree */
hose->first_busno = 0;
hose->last_busno = 0xff;
prop32 = of_get_property(np, "bus-range", &len);
if (prop32 && len == 8) {
hose->first_busno = prop32[0];
hose->last_busno = prop32[1];
} else {
pr_warn(" Broken <bus-range> on %s\n", np->full_name);
hose->first_busno = 0;
hose->last_busno = 0xff;
}
hose->private_data = phb;
phb->hub_id = hub_id;
phb->opal_id = phb_id;