RE: [PATCH V2 3/5] PCI: xilinx: Modifying AXI PCIe Host Bridge driver to work on both Zynq and Microblaze

Subject: Re: [PATCH V2 3/5] PCI: xilinx: Modifying AXI PCIe Host Bridge driver
to work on both Zynq and Microblaze

On Wednesday 27 January 2016 14:33:45 Bharat Kumar Gogada wrote:

quoted

quoted

quoted

@@ -705,7 +715,9 @@ static int xilinx_pcie_probe(struct

platform_device *pdev)  #endif
    pci_scan_child_bus(bus);
    pci_assign_unassigned_bus_resources(bus);
+#ifdef CONFIG_ARM
    pci_fixup_irqs(pci_common_swizzle, of_irq_parse_and_map_pci);
+#endif
    pci_bus_add_devices(bus);
    platform_set_drvdata(pdev, port);

Here it looks like microblaze gets it right. I'm not sure why we
still need the
pci_fixup_irqs() on ARM, but my feeling is that this should be fixed
in common code.

In arm pci_fixup_irqs is called by pci_common_init_dev

(arch/arm/kernel/bios32.c), since this API is removed now, I was calling it
separately.

But who calls it in microblaze? If it works without the extra call there, can we
make it work the same way for ARM?

In microblaze I have added pcibios_add_device call (similar to call in arch/arm64/kernel/pci.c ) in pci-common.c, which is being invoked by kernel core itself. May be we can add similar on arm and test out, but we might need some cleanup in arch/arm/kernel/bios32.c

Bharat