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mpc512x_shared.c

/*
 * Copyright (C) 2007,2008 Freescale Semiconductor, Inc. All rights reserved.
 *
 * Author: John Rigby <jrigby@freescale.com>
 *
 * Description:
 * MPC512x Shared code
 *
 * This is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 */

#include <linux/kernel.h>
#include <linux/io.h>
#include <linux/irq.h>
#include <linux/of_platform.h>

#include <asm/machdep.h>
#include <asm/ipic.h>
#include <asm/prom.h>
#include <asm/time.h>

#include "mpc512x.h"

unsigned long
mpc512x_find_ips_freq(struct device_node *node)
{
      struct device_node *np;
      const unsigned int *p_ips_freq = NULL;

      of_node_get(node);
      while (node) {
            p_ips_freq = of_get_property(node, "bus-frequency", NULL);
            if (p_ips_freq)
                  break;

            np = of_get_parent(node);
            of_node_put(node);
            node = np;
      }
      if (node)
            of_node_put(node);

      return p_ips_freq ? *p_ips_freq : 0;
}
EXPORT_SYMBOL(mpc512x_find_ips_freq);

void __init mpc512x_init_IRQ(void)
{
      struct device_node *np;

      np = of_find_compatible_node(NULL, NULL, "fsl,mpc5121-ipic");
      if (!np)
            return;

      ipic_init(np, 0);
      of_node_put(np);

      /*
       * Initialize the default interrupt mapping priorities,
       * in case the boot rom changed something on us.
       */
      ipic_set_default_priority();
}

/*
 * Nodes to do bus probe on, soc and localbus
 */
static struct of_device_id __initdata of_bus_ids[] = {
      { .compatible = "fsl,mpc5121-immr", },
      { .compatible = "fsl,mpc5121-localbus", },
      {},
};

void __init mpc512x_declare_of_platform_devices(void)
{
      if (of_platform_bus_probe(NULL, of_bus_ids, NULL))
            printk(KERN_ERR __FILE__ ": "
                  "Error while probing of_platform bus\n");
}


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