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   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 #endif
  42         mpc831x_usb_cfg();
  43 }
  44
  45 static void __init mpc831x_rdb_init_IRQ(void)
  46 {
  47         struct device_node *np;
  48
  49         np = of_find_node_by_type(NULL, "ipic");
  50         if (!np)
  51                 return;
  52
  53         ipic_init(np, 0);
  54
  55         /* Initialize the default interrupt mapping priorities,
  56          * in case the boot rom changed something on us.
  57          */
  58         ipic_set_default_priority();
  59 }
  60
  61 /*
  62  * Called very early, MMU is off, device-tree isn't unflattened
  63  */
  64 static int __init mpc831x_rdb_probe(void)
  65 {
  66         unsigned long root = of_get_flat_dt_root();
  67
  68         return of_flat_dt_is_compatible(root, "MPC8313ERDB") ||
  69                of_flat_dt_is_compatible(root, "fsl,mpc8315erdb");
  70 }
  71
  72 static struct of_device_id __initdata of_bus_ids[] = {
  73         { .compatible = "simple-bus" },
  74         {},
  75 };
  76
  77 static int __init declare_of_platform_devices(void)
  78 {
  79         of_platform_bus_probe(NULL, of_bus_ids, NULL);
  80         return 0;
  81 }
  82 machine_device_initcall(mpc831x_rdb, declare_of_platform_devices);
  83
  84 define_machine(mpc831x_rdb) {
  85         .name                   = "MPC831x RDB",
  86         .probe                  = mpc831x_rdb_probe,
  87         .setup_arch             = mpc831x_rdb_setup_arch,
  88         .init_IRQ               = mpc831x_rdb_init_IRQ,
  89         .get_irq                = ipic_get_irq,
  90         .restart                = mpc83xx_restart,
  91         .time_init              = mpc83xx_time_init,
  92         .calibrate_decr         = generic_calibrate_decr,
  93         .progress               = udbg_progress,
  94 };