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
23 static 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
31 static int __init ppc44x_device_probe(void)
32 {
33 of_platform_bus_probe(NULL, ppc44x_of_bus, NULL);
34
35 return 0;
36 }
37 machine_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 */
48 static 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
64 static 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
78 define_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
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