1 /*
2 * Generic PowerPC 40x platform support
3 *
4 * Copyright 2008 IBM Corporation
5 *
6 * This program is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License as published by the
8 * Free Software Foundation; version 2 of the License.
9 *
10 * This implements simple platform support for PowerPC 44x chips. This is
11 * mostly used for eval boards or other simple and "generic" 44x boards. If
12 * your board has custom functions or hardware, then you will likely want to
13 * implement your own board.c file to accommodate it.
14 */
15
16 #include <asm/machdep.h>
17 #include <asm/pci-bridge.h>
18 #include <asm/ppc4xx.h>
19 #include <asm/prom.h>
20 #include <asm/time.h>
21 #include <asm/udbg.h>
22 #include <asm/uic.h>
23
24 #include <linux/init.h>
25 #include <linux/of_platform.h>
26
27 static const struct of_device_id ppc40x_of_bus[] __initconst = {
28 { .compatible = "ibm,plb3", },
29 { .compatible = "ibm,plb4", },
30 { .compatible = "ibm,opb", },
31 { .compatible = "ibm,ebc", },
32 { .compatible = "simple-bus", },
33 {},
34 };
35
ppc40x_device_probe(void)36 static int __init ppc40x_device_probe(void)
37 {
38 of_platform_bus_probe(NULL, ppc40x_of_bus, NULL);
39
40 return 0;
41 }
42 machine_device_initcall(ppc40x_simple, ppc40x_device_probe);
43
44 /* This is the list of boards that can be supported by this simple
45 * platform code. This does _not_ mean the boards are compatible,
46 * as they most certainly are not from a device tree perspective.
47 * However, their differences are handled by the device tree and the
48 * drivers and therefore they don't need custom board support files.
49 *
50 * Again, if your board needs to do things differently then create a
51 * board.c file for it rather than adding it to this list.
52 */
53 static const char * const board[] __initconst = {
54 "amcc,acadia",
55 "amcc,haleakala",
56 "amcc,kilauea",
57 "amcc,makalu",
58 "apm,klondike",
59 "est,hotfoot",
60 "plathome,obs600",
61 NULL
62 };
63
ppc40x_probe(void)64 static int __init ppc40x_probe(void)
65 {
66 if (of_flat_dt_match(of_get_flat_dt_root(), board)) {
67 pci_set_flags(PCI_REASSIGN_ALL_RSRC);
68 return 1;
69 }
70
71 return 0;
72 }
73
define_machine(ppc40x_simple)74 define_machine(ppc40x_simple) {
75 .name = "PowerPC 40x Platform",
76 .probe = ppc40x_probe,
77 .progress = udbg_progress,
78 .init_IRQ = uic_init_tree,
79 .get_irq = uic_get_irq,
80 .restart = ppc4xx_reset_system,
81 .calibrate_decr = generic_calibrate_decr,
82 };
83