MIPS: RC32434: Define io_map_base for PCI controller

The code is rather based on trial-and-error than knowledge. Verified Via
Rhine functionality in PIO as well as MMIO mode.

[Looks sane -- Ralf]

Signed-off-by: Phil Sutter <[e-mail]>
Tested-by: Florian Fainelli <[e-mail]>
Signed-off-by: Ralf Baechle <[e-mail]>

arch/mips/pci/pci-rc32434.c

···
 
 static int __init rc32434_pci_init(void)
 {
+	void __iomem *io_map_base;
+
 	pr_info("PCI: Initializing PCI\n");
 
 	ioport_resource.start = rc32434_res_pci_io1.start;
 	ioport_resource.end = rc32434_res_pci_io1.end;
 
 	rc32434_pcibridge_init();
+
+	io_map_base = ioremap(rc32434_res_pci_io1.start,
+		rc32434_res_pci_io1.end - rc32434_res_pci_io1.start + 1);
+
+	if (!io_map_base)
+		return -ENOMEM;
+
+	rc32434_controller.io_map_base =
+		(unsigned long)io_map_base - rc32434_res_pci_io1.start;
 
 	register_pci_controller(&rc32434_controller);
 	rc32434_sync();