1 /*
2  * arch/powerpc/platforms/83xx/mpc831x_rdb.c
3  *
4  * Description: MPC831x RDB board specific routines.
5  * This file is based on mpc834x_sys.c
6  * Author: Lo Wlison <r43300@freescale.com>
7  *
8  * Copyright (C) Freescale Semiconductor, Inc. 2006. All rights reserved.
9  *
10  * This program is free software; you can redistribute  it and/or modify it
11  * under  the terms of  the GNU General  Public License as published by the
12  * Free Software Foundation;  either version 2 of the  License, or (at your
13  * option) any later version.
14  */
15 
16 #include <linux/pci.h>
17 #include <linux/of_platform.h>
18 
19 #include <asm/time.h>
20 #include <asm/ipic.h>
21 #include <asm/udbg.h>
22 
23 #include "mpc83xx.h"
24 
25 /*
26  * Setup the architecture
27  */
28 static void __init mpc831x_rdb_setup_arch(void)
29 {
30 #ifdef CONFIG_PCI
31 	struct device_node *np;
32 #endif
33 
34 	if (ppc_md.progress)
35 		ppc_md.progress("mpc831x_rdb_setup_arch()", 0);
36 
37 #ifdef CONFIG_PCI
38 	for_each_compatible_node(np, "pci", "fsl,mpc8349-pci")
39 		mpc83xx_add_bridge(np);
40 #endif
41 	mpc831x_usb_cfg();
42 }
43 
44 void __init mpc831x_rdb_init_IRQ(void)
45 {
46 	struct device_node *np;
47 
48 	np = of_find_node_by_type(NULL, "ipic");
49 	if (!np)
50 		return;
51 
52 	ipic_init(np, 0);
53 
54 	/* Initialize the default interrupt mapping priorities,
55 	 * in case the boot rom changed something on us.
56 	 */
57 	ipic_set_default_priority();
58 }
59 
60 /*
61  * Called very early, MMU is off, device-tree isn't unflattened
62  */
63 static int __init mpc831x_rdb_probe(void)
64 {
65 	unsigned long root = of_get_flat_dt_root();
66 
67 	return of_flat_dt_is_compatible(root, "MPC8313ERDB") ||
68 	       of_flat_dt_is_compatible(root, "fsl,mpc8315erdb");
69 }
70 
71 static struct of_device_id __initdata of_bus_ids[] = {
72 	{ .compatible = "simple-bus" },
73 	{},
74 };
75 
76 static int __init declare_of_platform_devices(void)
77 {
78 	of_platform_bus_probe(NULL, of_bus_ids, NULL);
79 	return 0;
80 }
81 machine_device_initcall(mpc831x_rdb, declare_of_platform_devices);
82 
83 define_machine(mpc831x_rdb) {
84 	.name			= "MPC831x RDB",
85 	.probe			= mpc831x_rdb_probe,
86 	.setup_arch		= mpc831x_rdb_setup_arch,
87 	.init_IRQ		= mpc831x_rdb_init_IRQ,
88 	.get_irq		= ipic_get_irq,
89 	.restart		= mpc83xx_restart,
90 	.time_init		= mpc83xx_time_init,
91 	.calibrate_decr		= generic_calibrate_decr,
92 	.progress		= udbg_progress,
93 };
94