[PATCH 3/5] arm64, pci: Allow RC drivers to supply pcibios_add_device() implementation.

[ddaney.cavm@gmail.com (David Daney)]

From: David Daney <david.daney@cavium.com>

The default is to continue doing the what we have done before, but add
a hook so that this can be overridden.

Signed-off-by: David Daney <david.daney@cavium.com>
---
 arch/arm64/include/asm/pci.h |  3 +++
 arch/arm64/kernel/pci.c      | 10 ++++++++++
 2 files changed, 13 insertions(+)

diff --git a/arch/arm64/include/asm/pci.h b/arch/arm64/include/asm/pci.h
index b008a72..ad3fb18 100644
--- a/arch/arm64/include/asm/pci.h
+++ b/arch/arm64/include/asm/pci.h
@@ -37,6 +37,9 @@ static inline int pci_proc_domain(struct pci_bus *bus)
 {
 	return 1;
 }
+
+void set_pcibios_add_device(int (*arg)(struct pci_dev *));
+
 #endif  /* CONFIG_PCI */
 
 #endif  /* __KERNEL__ */
diff --git a/arch/arm64/kernel/pci.c b/arch/arm64/kernel/pci.c
index 4095379..3356023 100644
--- a/arch/arm64/kernel/pci.c
+++ b/arch/arm64/kernel/pci.c
@@ -38,11 +38,21 @@ resource_size_t pcibios_align_resource(void *data, const struct resource *res,
 	return res->start;
 }
 
+static int (*pcibios_add_device_impl)(struct pci_dev *);
+
+void set_pcibios_add_device(int (*arg)(struct pci_dev *))
+{
+	pcibios_add_device_impl = arg;
+}
+
 /*
  * Try to assign the IRQ number from DT when adding a new device
  */
 int pcibios_add_device(struct pci_dev *dev)
 {
+	if (pcibios_add_device_impl)
+		return pcibios_add_device_impl(dev);
+
 	dev->irq = of_irq_parse_and_map_pci(dev, 0, 0);
 
 	return 0;
-- 
1.9.1