1 // SPDX-License-Identifier: GPL-2.0-only
3 * Generic PowerPC 44x platform support
5 * Copyright 2008 IBM Corporation
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.
13 #include <asm/machdep.h>
14 #include <asm/pci-bridge.h>
15 #include <asm/ppc4xx.h>
20 #include <linux/init.h>
21 #include <linux/of_platform.h>
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", },
31 static int __init ppc44x_device_probe(void)
33 of_platform_bus_probe(NULL, ppc44x_of_bus, NULL);
37 machine_device_initcall(ppc44x_simple, ppc44x_device_probe);
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.
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.
48 static char *board[] __initdata = {
64 static int __init ppc44x_probe(void)
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);
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,