// SPDX-License-Identifier: GPL-2.0-or-later/* *    Copyright (C) 2006 Benjamin Herrenschmidt, IBM Corp. *			 <benh@kernel.crashing.org> *    and		 Arnd Bergmann, IBM Corp. */ #undef DEBUG #include <linux/string.h>#include <linux/kernel.h>#include <linux/init.h>#include <linux/export.h>#include <linux/mod_devicetable.h>#include <linux/pci.h>#include <linux/platform_device.h>#include <linux/atomic.h> #include <asm/errno.h>#include <asm/topology.h>#include <asm/pci-bridge.h>#include <asm/ppc-pci.h>#include <asm/eeh.h> #ifdef CONFIG_PPC_OF_PLATFORM_PCI /* The probing of PCI controllers from of_platform is currently * 64 bits only, mostly due to gratuitous differences between * the 32 and 64 bits PCI code on PowerPC and the 32 bits one * lacking some bits needed here. */ static int of_pci_phb_probe(struct platform_device *dev){	struct pci_controller *phb; 	/* Check if we can do that ... */	if (ppc_md.pci_setup_phb == NULL)		return -ENODEV; 	pr_info("Setting up PCI bus %pOF\n", dev->dev.of_node); 	/* Alloc and setup PHB data structure */	phb = pcibios_alloc_controller(dev->dev.of_node);	if (!phb)		return -ENODEV; 	/* Setup parent in sysfs */	phb->parent = &dev->dev; 	/* Setup the PHB using arch provided callback */	if (ppc_md.pci_setup_phb(phb)) {		pcibios_free_controller(phb);		return -ENODEV;	} 	/* Process "ranges" property */	pci_process_bridge_OF_ranges(phb, dev->dev.of_node, 0); 	/* Init pci_dn data structures */	pci_devs_phb_init_dynamic(phb); 	/* Create EEH PE for the PHB */	eeh_phb_pe_create(phb); 	/* Scan the bus */	pcibios_scan_phb(phb);	if (phb->bus == NULL)		return -ENXIO; 	/* Claim resources. This might need some rework as well depending	 * whether we are doing probe-only or not, like assigning unassigned	 * resources etc...	 */	pcibios_claim_one_bus(phb->bus); 	/* Add probed PCI devices to the device model */	pci_bus_add_devices(phb->bus); 	return 0;} static const struct of_device_id of_pci_phb_ids[] = {	{ .type = "pci", },	{ .type = "pcix", },	{ .type = "pcie", },	{ .type = "pciex", },	{ .type = "ht", },	{}}; static struct platform_driver of_pci_phb_driver = {	.probe = of_pci_phb_probe,	.driver = {		.name = "of-pci",		.of_match_table = of_pci_phb_ids,	},}; builtin_platform_driver(of_pci_phb_driver); #endif /* CONFIG_PPC_OF_PLATFORM_PCI */