1 /* 2 * Code borrowed from powerpc/kernel/pci-common.c 3 * 4 * Copyright (C) 2003 Anton Blanchard <anton@au.ibm.com>, IBM 5 * Copyright (C) 2014 ARM Ltd. 6 * 7 * This program is free software; you can redistribute it and/or 8 * modify it under the terms of the GNU General Public License 9 * version 2 as published by the Free Software Foundation. 10 * 11 */ 12 13 #include <linux/init.h> 14 #include <linux/io.h> 15 #include <linux/kernel.h> 16 #include <linux/mm.h> 17 #include <linux/of_pci.h> 18 #include <linux/of_platform.h> 19 #include <linux/slab.h> 20 21 #include <asm/pci-bridge.h> 22 23 /* 24 * Called after each bus is probed, but before its children are examined 25 */ 26 void pcibios_fixup_bus(struct pci_bus *bus) 27 { 28 /* nothing to do, expected to be removed in the future */ 29 } 30 31 /* 32 * We don't have to worry about legacy ISA devices, so nothing to do here 33 */ 34 resource_size_t pcibios_align_resource(void *data, const struct resource *res, 35 resource_size_t size, resource_size_t align) 36 { 37 return res->start; 38 } 39 40 /* 41 * Try to assign the IRQ number from DT when adding a new device 42 */ 43 int pcibios_add_device(struct pci_dev *dev) 44 { 45 dev->irq = of_irq_parse_and_map_pci(dev, 0, 0); 46 47 return 0; 48 } 49 50 51 #ifdef CONFIG_PCI_DOMAINS_GENERIC 52 static bool dt_domain_found = false; 53 54 void pci_bus_assign_domain_nr(struct pci_bus *bus, struct device *parent) 55 { 56 int domain = of_get_pci_domain_nr(parent->of_node); 57 58 if (domain >= 0) { 59 dt_domain_found = true; 60 } else if (dt_domain_found == true) { 61 dev_err(parent, "Node %s is missing \"linux,pci-domain\" property in DT\n", 62 parent->of_node->full_name); 63 return; 64 } else { 65 domain = pci_get_new_domain_nr(); 66 } 67 68 bus->domain_nr = domain; 69 } 70 #endif 71