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

[Dilip Kota]

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.k...@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