[PATCH v2 1/3] PCI: dwc: Add map irq callback

[Dilip Kota <eswara.kota@linux.intel.com>]

Certain platforms like Intel need to configure
registers to enable the interrupts.
Map Irq callback helps to perform platform specific
configurations while assigning or enabling the interrupts.

Signed-off-by: Dilip Kota <eswara.kota@linux.intel.com>
---
changes on v2:
	Addressing review comments to use if else {} instead of ternary operator
	to improver code readability.

 drivers/pci/controller/dwc/pcie-designware-host.c | 6 +++++-
 drivers/pci/controller/dwc/pcie-designware.h      | 1 +
 2 files changed, 6 insertions(+), 1 deletion(-)

diff --git a/drivers/pci/controller/dwc/pcie-designware-host.c b/drivers/pci/controller/dwc/pcie-designware-host.c
index f93252d0da5b..ca7b40ff5c94 100644
--- a/drivers/pci/controller/dwc/pcie-designware-host.c
+++ b/drivers/pci/controller/dwc/pcie-designware-host.c
@@ -470,9 +470,13 @@ int dw_pcie_host_init(struct pcie_port *pp)
 	bridge->sysdata = pp;
 	bridge->busnr = pp->root_bus_nr;
 	bridge->ops = &dw_pcie_ops;
-	bridge->map_irq = of_irq_parse_and_map_pci;
 	bridge->swizzle_irq = pci_common_swizzle;
 
+	if (pp->map_irq)
+		bridge->map_irq = pp->map_irq;
+	else
+		bridge->map_irq = of_irq_parse_and_map_pci;
+
 	ret = pci_scan_root_bus_bridge(bridge);
 	if (ret)
 		goto err_free_msi;
diff --git a/drivers/pci/controller/dwc/pcie-designware.h b/drivers/pci/controller/dwc/pcie-designware.h
index ffed084a0b4f..bc3657800dfa 100644
--- a/drivers/pci/controller/dwc/pcie-designware.h
+++ b/drivers/pci/controller/dwc/pcie-designware.h
@@ -173,6 +173,7 @@ struct pcie_port {
 	struct resource		*busn;
 	int			irq;
 	const struct dw_pcie_host_ops *ops;
+	int (*map_irq)(const struct pci_dev *dev, u8 slot, u8 pin);
 	int			msi_irq;
 	struct irq_domain	*irq_domain;
 	struct irq_domain	*msi_domain;
-- 
2.11.0