2 * Copyright (C) 2007 Freescale Semiconductor, Inc. All rights reserved.
4 * Author: John Rigby, <jrigby@freescale.com>, Thur Mar 29 2007
7 * MPC5121 ADS board setup
9 * This is free software; you can redistribute it and/or modify it
10 * under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
16 #include <linux/kernel.h>
18 #include <linux/irq.h>
19 #include <linux/of_platform.h>
21 #include <asm/machdep.h>
27 * mpc512x_find_ips_freq - Find the IPS bus frequency for a device
30 * Returns IPS bus frequency, or 0 if the bus frequency cannot be found.
33 mpc512x_find_ips_freq(struct device_node *node)
35 struct device_node *np;
36 const unsigned int *p_ips_freq = NULL;
40 p_ips_freq = of_get_property(node, "bus-frequency", NULL);
44 np = of_get_parent(node);
51 return p_ips_freq ? *p_ips_freq : 0;
53 EXPORT_SYMBOL(mpc512x_find_ips_freq);
55 static struct of_device_id __initdata of_bus_ids[] = {
57 { .name = "localbus", },
61 static void __init mpc5121_ads_declare_of_platform_devices(void)
63 /* Find every child of the SOC node and add it to of_platform */
64 if (of_platform_bus_probe(NULL, of_bus_ids, NULL))
65 printk(KERN_ERR __FILE__ ": "
66 "Error while probing of_platform bus\n");
69 static void __init mpc5121_ads_init_IRQ(void)
71 struct device_node *np;
73 np = of_find_compatible_node(NULL, NULL, "fsl,ipic");
81 * Initialize the default interrupt mapping priorities,
82 * in case the boot rom changed something on us.
84 ipic_set_default_priority();
88 * Called very early, MMU is off, device-tree isn't unflattened
90 static int __init mpc5121_ads_probe(void)
92 unsigned long root = of_get_flat_dt_root();
94 return of_flat_dt_is_compatible(root, "fsl,mpc5121ads");
97 define_machine(mpc5121_ads) {
98 .name = "MPC5121 ADS",
99 .probe = mpc5121_ads_probe,
100 .init = mpc5121_ads_declare_of_platform_devices,
101 .init_IRQ = mpc5121_ads_init_IRQ,
102 .get_irq = ipic_get_irq,
103 .calibrate_decr = generic_calibrate_decr,