pci/of: Consolidate pci_device_to_OF_node()

All archs do more or less the same thing now, move it into
a single generic place.

I chose pci.h rather than of_pci.h to avoid having to change
all call-sites to include the later.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Acked-by: Michal Simek <monstr@monstr.eu>
Acked-by: Grant Likely <grant.likely@secretlab.ca>
Acked-by: Jesse Barnes <jbarnes@virtuousgeek.org>

arch/microblaze/include/asm/pci-bridge.h

@@ -102,11 +102,6 @@ struct pci_controller {
 };
 
 #ifdef CONFIG_PCI
-static inline struct device_node *pci_device_to_OF_node(struct pci_dev *dev)
-{
-	return dev->dev.of_node;
-}
-
 static inline struct device_node *pci_bus_to_OF_node(struct pci_bus *bus)
 {
 	return bus->dev.of_node;

arch/powerpc/include/asm/pci-bridge.h

@@ -169,11 +169,6 @@ static inline struct pci_controller *pci_bus_to_host(const struct pci_bus *bus)
 	return bus->sysdata;
 }
 
-static inline struct device_node *pci_device_to_OF_node(struct pci_dev *dev)
-{
-	return dev->dev.of_node;
-}
-
 static inline struct device_node *pci_bus_to_OF_node(struct pci_bus *bus)
 {
 	return bus->dev.of_node;

arch/sparc/include/asm/pci_32.h

@@ -42,9 +42,6 @@ static inline void pci_dma_burst_advice(struct pci_dev *pdev,
 }
 #endif
 
-struct device_node;
-extern struct device_node *pci_device_to_OF_node(struct pci_dev *pdev);
-
 #endif /* __KERNEL__ */
 
 /* generic pci stuff */

arch/sparc/include/asm/pci_64.h

@@ -91,9 +91,6 @@ static inline int pci_get_legacy_ide_irq(struct pci_dev *dev, int channel)
 	return PCI_IRQ_NONE;
 }
 
-struct device_node;
-extern struct device_node *pci_device_to_OF_node(struct pci_dev *pdev);
-
 #define HAVE_ARCH_PCI_RESOURCE_TO_USER
 extern void pci_resource_to_user(const struct pci_dev *dev, int bar,
 				 const struct resource *rsrc,

arch/sparc/kernel/pci.c

@@ -1021,12 +1021,6 @@ void arch_teardown_msi_irq(unsigned int irq)
 }
 #endif /* !(CONFIG_PCI_MSI) */
 
-struct device_node *pci_device_to_OF_node(struct pci_dev *pdev)
-{
-	return pdev->dev.of_node;
-}
-EXPORT_SYMBOL(pci_device_to_OF_node);
-
 static void ali_sound_dma_hack(struct pci_dev *pdev, int set_bit)
 {
 	struct pci_dev *ali_isa_bridge;

arch/sparc/kernel/pcic.c

@@ -885,14 +885,6 @@ int pcibios_assign_resource(struct pci_dev *pdev, int resource)
 	return -ENXIO;
 }
 
-struct device_node *pci_device_to_OF_node(struct pci_dev *pdev)
-{
-	struct pcidev_cookie *pc = pdev->sysdata;
-
-	return pc->prom_node;
-}
-EXPORT_SYMBOL(pci_device_to_OF_node);
-
 /*
  * This probably belongs here rather than ioport.c because
  * we do not want this crud linked into SBus kernels.

arch/x86/include/asm/prom.h

@@ -31,11 +31,6 @@ extern void x86_add_irq_domains(void);
 void __cpuinit x86_of_pci_init(void);
 void x86_dtb_init(void);
 
-static inline struct device_node *pci_device_to_OF_node(struct pci_dev *pdev)
-{
-	return pdev ? pdev->dev.of_node : NULL;
-}
-
 static inline struct device_node *pci_bus_to_OF_node(struct pci_bus *bus)
 {
 	return pci_device_to_OF_node(bus->self);

include/linux/pci.h

@@ -1600,6 +1600,11 @@ extern void pci_release_bus_of_node(struct pci_bus *bus);
 /* Arch may override this (weak) */
 extern struct device_node * __weak pcibios_get_phb_of_node(struct pci_bus *bus);
 
+static inline struct device_node *pci_device_to_OF_node(struct pci_dev *pdev)
+{
+	return pdev ? pdev->dev.of_node : NULL;
+}
+
 #else /* CONFIG_OF */
 static inline void pci_set_of_node(struct pci_dev *dev) { }
 static inline void pci_release_of_node(struct pci_dev *dev) { }