PCI: iproc: Allow override of device tree IRQ mapping function

The iProc core PCIe driver defaults to using of_irq_parse_and_map_pci() for
IRQ mapping.  Add iproc_pcie.map_irq so bus interfaces that don't use
device tree can override this by supplying their own IRQ mapping function.

[bhelgaas: changelog]
Posting: http://lkml.kernel.org/r/1431465781-10753-1-git-send-email-hauke@hauke-m.de
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Ray Jui <rjui@broadcom.com.com>

3 files changed, 4 insertions, 1 deletions

diff --git a/drivers/pci/host/pcie-iproc-platform.c b/drivers/pci/host/pcie-iproc-platform.c
index afad6c21fcfa..c8aa06f10d73 100644
--- a/drivers/pci/host/pcie-iproc-platform.c
+++ b/drivers/pci/host/pcie-iproc-platform.c
@@ -71,6 +71,8 @@ static int iproc_pcie_pltfm_probe(struct platform_device *pdev)
 
         pcie->resources = &res;
 
+        pcie->map_irq = of_irq_parse_and_map_pci;
+
         ret = iproc_pcie_setup(pcie);
         if (ret) {
                 dev_err(pcie->dev, "PCIe controller setup failed\n");
diff --git a/drivers/pci/host/pcie-iproc.c b/drivers/pci/host/pcie-iproc.c
index 329e1b54528b..cef31f6a1242 100644
--- a/drivers/pci/host/pcie-iproc.c
+++ b/drivers/pci/host/pcie-iproc.c
@@ -229,7 +229,7 @@ int iproc_pcie_setup(struct iproc_pcie *pcie)
 
         pci_scan_child_bus(bus);
         pci_assign_unassigned_bus_resources(bus);
-        pci_fixup_irqs(pci_common_swizzle, of_irq_parse_and_map_pci);
+        pci_fixup_irqs(pci_common_swizzle, pcie->map_irq);
         pci_bus_add_devices(bus);
 
         return 0;
diff --git a/drivers/pci/host/pcie-iproc.h b/drivers/pci/host/pcie-iproc.h
index e28075ed1856..a333d4b7723a 100644
--- a/drivers/pci/host/pcie-iproc.h
+++ b/drivers/pci/host/pcie-iproc.h
@@ -34,6 +34,7 @@ struct iproc_pcie {
         struct pci_bus *root_bus;
         struct phy *phy;
         int irqs[IPROC_PCIE_MAX_NUM_IRQS];
+        int (*map_irq)(const struct pci_dev *, u8, u8);
 };
 
 int iproc_pcie_setup(struct iproc_pcie *pcie);