d1e6dc91b5
Use the generic PCI domain and OF functions to provide support for PCI on arm64. [bhelgaas: Change comments to use generic PCI, not just PCIe. Nothing at this level is PCIe-specific.] Signed-off-by: Liviu Dudau <Liviu.Dudau@arm.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Acked-by: Catalin Marinas <catalin.marinas@arm.com>
70 lines
1.6 KiB
C
70 lines
1.6 KiB
C
/*
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* Code borrowed from powerpc/kernel/pci-common.c
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*
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* Copyright (C) 2003 Anton Blanchard <anton@au.ibm.com>, IBM
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* Copyright (C) 2014 ARM Ltd.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* version 2 as published by the Free Software Foundation.
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*
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*/
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#include <linux/init.h>
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#include <linux/io.h>
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#include <linux/kernel.h>
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#include <linux/mm.h>
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#include <linux/of_pci.h>
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#include <linux/of_platform.h>
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#include <linux/slab.h>
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#include <asm/pci-bridge.h>
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/*
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* Called after each bus is probed, but before its children are examined
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*/
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void pcibios_fixup_bus(struct pci_bus *bus)
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{
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/* nothing to do, expected to be removed in the future */
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}
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/*
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* We don't have to worry about legacy ISA devices, so nothing to do here
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*/
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resource_size_t pcibios_align_resource(void *data, const struct resource *res,
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resource_size_t size, resource_size_t align)
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{
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return res->start;
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}
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/*
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* Try to assign the IRQ number from DT when adding a new device
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*/
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int pcibios_add_device(struct pci_dev *dev)
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{
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dev->irq = of_irq_parse_and_map_pci(dev, 0, 0);
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return 0;
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}
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#ifdef CONFIG_PCI_DOMAINS_GENERIC
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static bool dt_domain_found = false;
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void pci_bus_assign_domain_nr(struct pci_bus *bus, struct device *parent)
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{
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int domain = of_get_pci_domain_nr(parent->of_node);
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if (domain >= 0) {
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dt_domain_found = true;
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} else if (dt_domain_found == true) {
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dev_err(parent, "Node %s is missing \"linux,pci-domain\" property in DT\n",
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parent->of_node->full_name);
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return;
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} else {
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domain = pci_get_new_domain_nr();
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}
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bus->domain_nr = domain;
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}
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#endif
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