[PATCH] powerpc: Recognize /chaos bridge on old pmacs as PCI

Paul Mackerras paulus at samba.org
Sat Jan 14 14:34:36 EST 2006

The first generation of PCI powermacs had a host bridge called /chaos
which was for all intents and purposes a PCI host bridge, but has a
device_type of "vci" in the device tree (presumably it's not really
PCI at the hardware level or something).

The OF parsing stuff in arch/powerpc/kernel/prom_parse.c currently
doesn't recognize it as a PCI bridge, which means that controlfb.c
can't get its device addresses.

This makes prom_parse.c recognize a device_type of "vci" as indicating
a PCI host bridge.  With this, controlfb works again.

Signed-off-by: Paul Mackerras <paulus at samba.org>

diff --git a/arch/powerpc/kernel/prom_parse.c b/arch/powerpc/kernel/prom_parse.c
index 309ae1d..a8099c8 100644
--- a/arch/powerpc/kernel/prom_parse.c
+++ b/arch/powerpc/kernel/prom_parse.c
@@ -113,7 +113,8 @@ static unsigned int of_bus_default_get_f
 static int of_bus_pci_match(struct device_node *np)
-	return !strcmp(np->type, "pci");
+	/* "vci" is for the /chaos bridge on 1st-gen PCI powermacs */
+	return !strcmp(np->type, "pci") || !strcmp(np->type, "vci");
 static void of_bus_pci_count_cells(struct device_node *np,

More information about the Linuxppc-dev mailing list