1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * Copyright (C) 2006 Benjamin Herrenschmidt, IBM Corp.
5 * and Arnd Bergmann, IBM Corp.
10 #include <linux/string.h>
11 #include <linux/kernel.h>
12 #include <linux/init.h>
13 #include <linux/export.h>
14 #include <linux/mod_devicetable.h>
15 #include <linux/pci.h>
16 #include <linux/platform_device.h>
17 #include <linux/atomic.h>
19 #include <asm/errno.h>
20 #include <asm/topology.h>
21 #include <asm/pci-bridge.h>
22 #include <asm/ppc-pci.h>
25 #ifdef CONFIG_PPC_OF_PLATFORM_PCI
27 /* The probing of PCI controllers from of_platform is currently
28 * 64 bits only, mostly due to gratuitous differences between
29 * the 32 and 64 bits PCI code on PowerPC and the 32 bits one
30 * lacking some bits needed here.
33 static int of_pci_phb_probe(struct platform_device *dev)
35 struct pci_controller *phb;
37 /* Check if we can do that ... */
38 if (ppc_md.pci_setup_phb == NULL)
41 pr_info("Setting up PCI bus %pOF\n", dev->dev.of_node);
43 /* Alloc and setup PHB data structure */
44 phb = pcibios_alloc_controller(dev->dev.of_node);
48 /* Setup parent in sysfs */
49 phb->parent = &dev->dev;
51 /* Setup the PHB using arch provided callback */
52 if (ppc_md.pci_setup_phb(phb)) {
53 pcibios_free_controller(phb);
57 /* Process "ranges" property */
58 pci_process_bridge_OF_ranges(phb, dev->dev.of_node, 0);
60 /* Init pci_dn data structures */
61 pci_devs_phb_init_dynamic(phb);
63 /* Create EEH PE for the PHB */
64 eeh_phb_pe_create(phb);
67 pcibios_scan_phb(phb);
71 /* Claim resources. This might need some rework as well depending
72 * whether we are doing probe-only or not, like assigning unassigned
75 pcibios_claim_one_bus(phb->bus);
77 /* Add probed PCI devices to the device model */
78 pci_bus_add_devices(phb->bus);
83 static const struct of_device_id of_pci_phb_ids[] = {
92 static struct platform_driver of_pci_phb_driver = {
93 .probe = of_pci_phb_probe,
96 .of_match_table = of_pci_phb_ids,
100 builtin_platform_driver(of_pci_phb_driver);
102 #endif /* CONFIG_PPC_OF_PLATFORM_PCI */