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 #include <sysdev/fsl_pci.h>
23 
24 #include "mpc83xx.h"
25 
26 /*
27  * Setup the architecture
28  */
29 static void __init mpc831x_rdb_setup_arch(void)
30 {
31 #ifdef CONFIG_PCI
32 	struct device_node *np;
33 #endif
34 
35 	if (ppc_md.progress)
36 		ppc_md.progress("mpc831x_rdb_setup_arch()", 0);
37 
38 #ifdef CONFIG_PCI
39 	for_each_compatible_node(np, "pci", "fsl,mpc8349-pci")
40 		mpc83xx_add_bridge(np);
41 	for_each_compatible_node(np, "pci", "fsl,mpc8314-pcie")
42 		mpc83xx_add_bridge(np);
43 #endif
44 	mpc831x_usb_cfg();
45 }
46 
47 static void __init mpc831x_rdb_init_IRQ(void)
48 {
49 	struct device_node *np;
50 
51 	np = of_find_node_by_type(NULL, "ipic");
52 	if (!np)
53 		return;
54 
55 	ipic_init(np, 0);
56 
57 	/* Initialize the default interrupt mapping priorities,
58 	 * in case the boot rom changed something on us.
59 	 */
60 	ipic_set_default_priority();
61 }
62 
63 /*
64  * Called very early, MMU is off, device-tree isn't unflattened
65  */
66 static int __init mpc831x_rdb_probe(void)
67 {
68 	unsigned long root = of_get_flat_dt_root();
69 
70 	return of_flat_dt_is_compatible(root, "MPC8313ERDB") ||
71 	       of_flat_dt_is_compatible(root, "fsl,mpc8315erdb");
72 }
73 
74 static struct of_device_id __initdata of_bus_ids[] = {
75 	{ .compatible = "simple-bus" },
76 	{ .compatible = "gianfar" },
77 	{},
78 };
79 
80 static int __init declare_of_platform_devices(void)
81 {
82 	of_platform_bus_probe(NULL, of_bus_ids, NULL);
83 	return 0;
84 }
85 machine_device_initcall(mpc831x_rdb, declare_of_platform_devices);
86 
87 define_machine(mpc831x_rdb) {
88 	.name			= "MPC831x RDB",
89 	.probe			= mpc831x_rdb_probe,
90 	.setup_arch		= mpc831x_rdb_setup_arch,
91 	.init_IRQ		= mpc831x_rdb_init_IRQ,
92 	.get_irq		= ipic_get_irq,
93 	.restart		= mpc83xx_restart,
94 	.time_init		= mpc83xx_time_init,
95 	.calibrate_decr		= generic_calibrate_decr,
96 	.progress		= udbg_progress,
97 };
98