PCI: designware: Use new OF interrupt mapping when possible

Use new OF interrupt mapping (of_irq_parse_and_map_pci()) when possible.
This is the recommended method of doing the IRQ mapping.  For old
devicetrees we fall back to the previous practice.

This makes INTB, INTC, and INTD work on i.MX.

Tested-by: Tim Harvey <tharvey@gateworks.com>
Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Marek Vasut <marex@denx.de>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Jingoo Han <jg1.han@samsung.com>
(cherry picked from commit 804f57b1a63c7435fe43b36942581cc6c79ebb5c)

diff --git a/drivers/pci/host/pcie-designware.c b/drivers/pci/host/pcie-designware.c
index a9a62ce4bf05cac4fa6a3ba27c0b38971ca75863..c4e373294476a701278c93b4619610a9ed181f70 100644 (file)
--- a/drivers/pci/host/pcie-designware.c
+++ b/drivers/pci/host/pcie-designware.c
@@ -17,6 +17,7 @@
 #include <linux/module.h>
 #include <linux/msi.h>
 #include <linux/of_address.h>
+#include <linux/of_pci.h>
 #include <linux/pci.h>
 #include <linux/pci_regs.h>
 #include <linux/types.h>
@@ -490,7 +491,7 @@ int __init dw_pcie_host_init(struct pcie_port *pp)
        dw_pci.nr_controllers = 1;
        dw_pci.private_data = (void **)&pp;
 
-       pci_common_init(&dw_pci);
+       pci_common_init_dev(pp->dev, &dw_pci);
        pci_assign_unassigned_resources();
 #ifdef CONFIG_PCI_DOMAINS
        dw_pci.domain++;
@@ -723,7 +724,7 @@ static struct pci_bus *dw_pcie_scan_bus(int nr, struct pci_sys_data *sys)
 
        if (pp) {
                pp->root_bus_nr = sys->busnr;
-               bus = pci_scan_root_bus(NULL, sys->busnr, &dw_pcie_ops,
+               bus = pci_scan_root_bus(pp->dev, sys->busnr, &dw_pcie_ops,
                                        sys, &sys->resources);
        } else {
                bus = NULL;
@@ -736,8 +737,13 @@ static struct pci_bus *dw_pcie_scan_bus(int nr, struct pci_sys_data *sys)
 static int dw_pcie_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
 {
        struct pcie_port *pp = sys_to_pcie(dev->bus->sysdata);
+       int irq;
 
-       return pp->irq;
+       irq = of_irq_parse_and_map_pci(dev, slot, pin);
+       if (!irq)
+               irq = pp->irq;
+
+       return irq;
 }
 
 static void dw_pcie_add_bus(struct pci_bus *bus)