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>
diff --git a/arch/powerpc/platforms/powernv/pci-ioda.c b/arch/powerpc/platforms/powernv/pci-ioda.c
index 9cccdc7..f472228 100644
--- a/arch/powerpc/platforms/powernv/pci-ioda.c
+++ b/arch/powerpc/platforms/powernv/pci-ioda.c
@@ -1109,6 +1109,7 @@
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 @@
}
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;