/arch/powerpc/platforms/40x/walnut.c

 1/*
 2 * Architecture- / platform-specific boot-time initialization code for
 3 * IBM PowerPC 4xx based boards. Adapted from original
 4 * code by Gary Thomas, Cort Dougan <cort@fsmlabs.com>, and Dan Malek
 5 * <dan@net4x.com>.
 6 *
 7 * Copyright(c) 1999-2000 Grant Erickson <grant@lcse.umn.edu>
 8 *
 9 * Rewritten and ported to the merged powerpc tree:
10 * Copyright 2007 IBM Corporation
11 * Josh Boyer <jwboyer@linux.vnet.ibm.com>
12 *
13 * 2002 (c) MontaVista, Software, Inc.  This file is licensed under
14 * the terms of the GNU General Public License version 2.  This program
15 * is licensed "as is" without any warranty of any kind, whether express
16 * or implied.
17 */
18
19#include <linux/init.h>
20#include <linux/of_platform.h>
21#include <linux/rtc.h>
22
23#include <asm/machdep.h>
24#include <asm/prom.h>
25#include <asm/udbg.h>
26#include <asm/time.h>
27#include <asm/uic.h>
28#include <asm/pci-bridge.h>
29#include <asm/ppc4xx.h>
30
31static __initdata struct of_device_id walnut_of_bus[] = {
32	{ .compatible = "ibm,plb3", },
33	{ .compatible = "ibm,opb", },
34	{ .compatible = "ibm,ebc", },
35	{},
36};
37
38static int __init walnut_device_probe(void)
39{
40	of_platform_bus_probe(NULL, walnut_of_bus, NULL);
41	of_instantiate_rtc();
42
43	return 0;
44}
45machine_device_initcall(walnut, walnut_device_probe);
46
47static int __init walnut_probe(void)
48{
49	unsigned long root = of_get_flat_dt_root();
50
51	if (!of_flat_dt_is_compatible(root, "ibm,walnut"))
52		return 0;
53
54	ppc_pci_flags = PPC_PCI_REASSIGN_ALL_RSRC;
55
56	return 1;
57}
58
59define_machine(walnut) {
60	.name			= "Walnut",
61	.probe			= walnut_probe,
62	.progress		= udbg_progress,
63	.init_IRQ		= uic_init_tree,
64	.get_irq		= uic_get_irq,
65	.restart		= ppc4xx_reset_system,
66	.calibrate_decr		= generic_calibrate_decr,
67};