powerpc/44x/bamboo: Fix PCI range

[ Upstream commit 3cfb9ebe906b51f2942b1e251009bb251efd2ba6 ]

The bamboo dts has a bug: it uses a non-naturally aligned range
for PCI memory space. This isnt' supported by the code, thus
causing PCI to break on this system.

This is due to the fact that while the chip memory map has 1G
reserved for PCI memory, it's only 512M aligned. The code doesn't
know how to split that into 2 different PMMs and fails, so limit
the region to 512M.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/arch/powerpc/boot/dts/bamboo.dts b/arch/powerpc/boot/dts/bamboo.dts
index aa68911f6560a21449d19c283d0c0388016c5429..084b82ba749338744fdabb7908cb2b0bfa0c3f73 100644 (file)
--- a/arch/powerpc/boot/dts/bamboo.dts
+++ b/arch/powerpc/boot/dts/bamboo.dts
@@ -268,8 +268,10 @@
                        /* Outbound ranges, one memory and one IO,
                         * later cannot be changed. Chip supports a second
                         * IO range but we don't use it for now
+                        * The chip also supports a larger memory range but
+                        * it's not naturally aligned, so our code will break
                         */
-                       ranges = <0x02000000 0x00000000 0xa0000000 0x00000000 0xa0000000 0x00000000 0x40000000
+                       ranges = <0x02000000 0x00000000 0xa0000000 0x00000000 0xa0000000 0x00000000 0x20000000
                                  0x02000000 0x00000000 0x00000000 0x00000000 0xe0000000 0x00000000 0x00100000
                                  0x01000000 0x00000000 0x00000000 0x00000000 0xe8000000 0x00000000 0x00010000>;