powerpc: Fix some late PowerMac G5 with PCIe ATI graphics
A misconfiguration by the firmware of the U4 PCIe bridge on PowerMac G5
with the U4 bridge (latest generations, may also affect the iMac G5
"iSight") is causing us to re-assign the PCI BARs of the video card,
which can get it out of sync with the firmware, thus breaking offb.
This works around it by fixing up the bridge configuration properly
at boot time. It also fixes a bug where the firmware provides us with
an incorrect set of accessible regions in the device-tree.
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
diff --git a/include/linux/pci_ids.h b/include/linux/pci_ids.h
index 73b46b6..c86bb6e 100644
--- a/include/linux/pci_ids.h
+++ b/include/linux/pci_ids.h
@@ -877,6 +877,7 @@
#define PCI_DEVICE_ID_APPLE_SH_SUNGEM 0x0051
#define PCI_DEVICE_ID_APPLE_U3L_AGP 0x0058
#define PCI_DEVICE_ID_APPLE_U3H_AGP 0x0059
+#define PCI_DEVICE_ID_APPLE_U4_PCIE 0x005b
#define PCI_DEVICE_ID_APPLE_IPID2_AGP 0x0066
#define PCI_DEVICE_ID_APPLE_IPID2_ATA 0x0069
#define PCI_DEVICE_ID_APPLE_IPID2_FW 0x006a