[ARM] Orion: PCI support

This patch adds support for PCI and PCI-E controllers in the
Orion, Orion-NAS and Orion2.

Signed-off-by: Tzachi Perelstein <tzachi@marvell.com>
Reviewed-by: Nicolas Pitre <nico@marvell.com>
Reviewed-by: Lennert Buytenhek <buytenh@marvell.com>
Acked-by: Russell King <rmk+kernel@arm.linux.org.uk>

arch/arm/Kconfig

@@ -336,6 +336,7 @@ config ARCH_MXC
 config ARCH_ORION
 	bool "Marvell Orion"
 	depends on MMU
+	select PCI
 	help
 	  Support for Marvell Orion System on Chip family.
 

arch/arm/mach-orion/Makefile

@@ -1 +1 @@
-obj-y  += common.o
+obj-y  += common.o pci.o

arch/arm/mach-orion/common.h

@@ -6,4 +6,21 @@
  */
 void __init orion_map_io(void);
 
+/*
+ * Shared code used internally by other Orion core functions.
+ * (/mach-orion/pci.c)
+ */
+
+struct pci_sys_data;
+struct pci_bus;
+
+void orion_pcie_id(u32 *dev, u32 *rev);
+u32 orion_pcie_local_bus_nr(void);
+u32 orion_pci_local_bus_nr(void);
+u32 orion_pci_local_dev_nr(void);
+int orion_pci_sys_setup(int nr, struct pci_sys_data *sys);
+struct pci_bus *orion_pci_sys_scan_bus(int nr, struct pci_sys_data *sys);
+int orion_pci_hw_rd_conf(u32 bus, u32 dev, u32 func, u32 where, u32 size, u32 *val);
+int orion_pci_hw_wr_conf(u32 bus, u32 dev, u32 func, u32 where, u32 size, u32 val);
+
 #endif /* __ARCH_ORION_COMMON_H__ */