1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Generic PowerPC 44x 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 ppc44x_of_bus[] __initconst = {
24	{ .compatible = "ibm,plb4", },
25	{ .compatible = "ibm,opb", },
26	{ .compatible = "ibm,ebc", },
27	{ .compatible = "simple-bus", },
28	{},
29};
30
31static int __init ppc44x_device_probe(void)
32{
33	of_platform_bus_probe(NULL, ppc44x_of_bus, NULL);
34
35	return 0;
36}
37machine_device_initcall(ppc44x_simple, ppc44x_device_probe);
38
39/* This is the list of boards that can be supported by this simple
40 * platform code.  This does _not_ mean the boards are compatible,
41 * as they most certainly are not from a device tree perspective.
42 * However, their differences are handled by the device tree and the
43 * drivers and therefore they don't need custom board support files.
44 *
45 * Again, if your board needs to do things differently then create a
46 * board.c file for it rather than adding it to this list.
47 */
48static char *board[] __initdata = {
49	"amcc,arches",
50	"amcc,bamboo",
51	"apm,bluestone",
52	"amcc,glacier",
53	"ibm,ebony",
54	"amcc,eiger",
55	"amcc,katmai",
56	"amcc,rainier",
57	"amcc,redwood",
58	"amcc,sequoia",
59	"amcc,taishan",
60	"amcc,yosemite",
61	"mosaixtech,icon"
62};
63
64static int __init ppc44x_probe(void)
65{
66	int i = 0;
67
68	for (i = 0; i < ARRAY_SIZE(board); i++) {
69		if (of_machine_is_compatible(board[i])) {
70			pci_set_flags(PCI_REASSIGN_ALL_RSRC);
71			return 1;
72		}
73	}
74
75	return 0;
76}
77
78define_machine(ppc44x_simple) {
79	.name = "PowerPC 44x Platform",
80	.probe = ppc44x_probe,
81	.progress = udbg_progress,
82	.init_IRQ = uic_init_tree,
83	.get_irq = uic_get_irq,
84	.restart = ppc4xx_reset_system,
85};
86