1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Generic PowerPC 40x platform support
4 *
5 * Copyright 2008 IBM Corporation
6 *
7 * This implements simple platform support for PowerPC 44x chips.  This is
8 * mostly used for eval boards or other simple and "generic" 44x boards.  If
9 * your board has custom functions or hardware, then you will likely want to
10 * implement your own board.c file to accommodate it.
11 */
12
13#include <asm/machdep.h>
14#include <asm/pci-bridge.h>
15#include <asm/ppc4xx.h>
16#include <asm/time.h>
17#include <asm/udbg.h>
18#include <asm/uic.h>
19
20#include <linux/init.h>
21#include <linux/of_platform.h>
22
23static const struct of_device_id ppc40x_of_bus[] __initconst = {
24	{ .compatible = "ibm,plb3", },
25	{ .compatible = "ibm,plb4", },
26	{ .compatible = "ibm,opb", },
27	{ .compatible = "ibm,ebc", },
28	{ .compatible = "simple-bus", },
29	{},
30};
31
32static int __init ppc40x_device_probe(void)
33{
34	of_platform_bus_probe(NULL, ppc40x_of_bus, NULL);
35
36	return 0;
37}
38machine_device_initcall(ppc40x_simple, ppc40x_device_probe);
39
40/* This is the list of boards that can be supported by this simple
41 * platform code.  This does _not_ mean the boards are compatible,
42 * as they most certainly are not from a device tree perspective.
43 * However, their differences are handled by the device tree and the
44 * drivers and therefore they don't need custom board support files.
45 *
46 * Again, if your board needs to do things differently then create a
47 * board.c file for it rather than adding it to this list.
48 */
49static const char * const board[] __initconst = {
50	"amcc,acadia",
51	"amcc,haleakala",
52	"amcc,kilauea",
53	"amcc,makalu",
54	"apm,klondike",
55	"est,hotfoot",
56	"plathome,obs600",
57	NULL
58};
59
60static int __init ppc40x_probe(void)
61{
62	if (of_device_compatible_match(of_root, board)) {
63		pci_set_flags(PCI_REASSIGN_ALL_RSRC);
64		return 1;
65	}
66
67	return 0;
68}
69
70define_machine(ppc40x_simple) {
71	.name = "PowerPC 40x Platform",
72	.probe = ppc40x_probe,
73	.progress = udbg_progress,
74	.init_IRQ = uic_init_tree,
75	.get_irq = uic_get_irq,
76	.restart = ppc4xx_reset_system,
77};
78