[POWERPC] 4xx: Add PCI to Walnut platform

This wires up the 4xx PCI support & device-tree bits for the
405GP based Walnut platform.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Josh Boyer <jwboyer@linux.vnet.ibm.com>

2 files changed, 40 insertions, 0 deletions

diff --git a/arch/powerpc/boot/dts/walnut.dts b/arch/powerpc/boot/dts/walnut.dts
index 754fa3960f83..681633ec954f 100644
--- a/arch/powerpc/boot/dts/walnut.dts
+++ b/arch/powerpc/boot/dts/walnut.dts
@@ -190,6 +190,45 @@
                                 virtual-reg = <f0300005>;
                         };
                 };
+
+                PCI0: pci@ec000000 {
+                        device_type = "pci";
+                        #interrupt-cells = <1>;
+                        #size-cells = <2>;
+                        #address-cells = <3>;
+                        compatible = "ibm,plb405gp-pci", "ibm,plb-pci";
+                        primary;
+                        reg = <eec00000 8       /* Config space access */
+                               eed80000 4       /* IACK */
+                               eed80000 4       /* Special cycle */
+                               ef480000 40>;    /* Internal registers */
+
+                        /* 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
+                         */
+                        ranges = <02000000 0 80000000 80000000 0 20000000
+                                  01000000 0 00000000 e8000000 0 00010000>;
+
+                        /* Inbound 2GB range starting at 0 */
+                        dma-ranges = <42000000 0 0 0 0 80000000>;
+
+                        /* Walnut has all 4 IRQ pins tied together per slot */
+                        interrupt-map-mask = <f800 0 0 0>;
+                        interrupt-map = <
+                                /* IDSEL 1 */
+                                0800 0 0 0 &UIC0 1c 8
+
+                                /* IDSEL 2 */
+                                1000 0 0 0 &UIC0 1d 8
+
+                                /* IDSEL 3 */
+                                1800 0 0 0 &UIC0 1e 8
+
+                                /* IDSEL 4 */
+                                2000 0 0 0 &UIC0 1f 8
+                        >;
+                };
         };
 
         chosen {
diff --git a/arch/powerpc/platforms/40x/Kconfig b/arch/powerpc/platforms/40x/Kconfig
index b8f0a6c16486..84551ab979f0 100644
--- a/arch/powerpc/platforms/40x/Kconfig
+++ b/arch/powerpc/platforms/40x/Kconfig
@@ -59,6 +59,7 @@ config WALNUT
         depends on 40x
         default y
         select 405GP
+        select PCI
         help
           This option enables support for the IBM PPC405GP evaluation board.