x86: dtb: Add support for PCI devices backed by dtb nodes

x86_of_pci_init() does two things:

- it provides a generic irq enable and disable function. enable queries
  the device tree for the interrupt information, calls ->xlate on the
  irq host and updates the pci->irq information for the device.

- it walks through PCI bus(es) in the device tree and adds its children
  (device) nodes to appropriate pci_dev nodes in kernel. So the dtb
  node information is available at probe time of the PCI device.

Adding a PCI bus based on the information in the device tree is
currently not supported. Right now direct access via ioports is used.

Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Tested-by: Dirk Brandewie <dirk.brandewie@gmail.com>
Acked-by: Grant Likely <grant.likely@secretlab.ca>
Cc: sodaville@linutronix.de
Cc: devicetree-discuss@lists.ozlabs.org
LKML-Reference: <1298405266-1624-8-git-send-email-bigeasy@linutronix.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

2 files changed, 2 insertions, 1 deletions

diff --git a/drivers/of/Kconfig b/drivers/of/Kconfig
index efabbf9dd607..d06a6374ed6c 100644
--- a/drivers/of/Kconfig
+++ b/drivers/of/Kconfig
@@ -71,7 +71,7 @@ config OF_MDIO
 
 config OF_PCI
         def_tristate PCI
-        depends on PCI && (PPC || MICROBLAZE)
+        depends on PCI && (PPC || MICROBLAZE || X86)
         help
           OpenFirmware PCI bus accessors
 
diff --git a/drivers/of/of_pci.c b/drivers/of/of_pci.c
index 314535fa32c1..ac1ec54e4fd5 100644
--- a/drivers/of/of_pci.c
+++ b/drivers/of/of_pci.c
@@ -1,5 +1,6 @@
 #include <linux/kernel.h>
 #include <linux/of_pci.h>
+#include <linux/of_irq.h>
 #include <asm/prom.h>
 
 /**