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/prom.h>
17#include <asm/time.h>
18#include <asm/udbg.h>
19#include <asm/uic.h>
20
21#include <linux/init.h>
22#include <linux/of_platform.h>
23
24static const struct of_device_id ppc44x_of_bus[] __initconst = {
25	{ .compatible = "ibm,plb4", },
26	{ .compatible = "ibm,opb", },
27	{ .compatible = "ibm,ebc", },
28	{ .compatible = "simple-bus", },
29	{},
30};
31
32static int __init ppc44x_device_probe(void)
33{
34	of_platform_bus_probe(NULL, ppc44x_of_bus, NULL);
35
36	return 0;
37}
38machine_device_initcall(ppc44x_simple, ppc44x_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 char *board[] __initdata = {
50	"amcc,arches",
51	"amcc,bamboo",
52	"apm,bluestone",
53	"amcc,glacier",
54	"ibm,ebony",
55	"amcc,eiger",
56	"amcc,katmai",
57	"amcc,rainier",
58	"amcc,redwood",
59	"amcc,sequoia",
60	"amcc,taishan",
61	"amcc,yosemite",
62	"mosaixtech,icon"
63};
64
65static int __init ppc44x_probe(void)
66{
67	int i = 0;
68
69	for (i = 0; i < ARRAY_SIZE(board); i++) {
70		if (of_machine_is_compatible(board[i])) {
71			pci_set_flags(PCI_REASSIGN_ALL_RSRC);
72			return 1;
73		}
74	}
75
76	return 0;
77}
78
79define_machine(ppc44x_simple) {
80	.name = "PowerPC 44x Platform",
81	.probe = ppc44x_probe,
82	.progress = udbg_progress,
83	.init_IRQ = uic_init_tree,
84	.get_irq = uic_get_irq,
85	.restart = ppc4xx_reset_system,
86	.calibrate_decr = generic_calibrate_decr,
87};
88