linux/arch/powerpc/platforms/40x/ppc40x_simple.c
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   1/*
   2 * Generic PowerPC 40x platform support
   3 *
   4 * Copyright 2008 IBM Corporation
   5 *
   6 * This program is free software; you can redistribute it and/or modify it
   7 * under the terms of the GNU General Public License as published by the
   8 * Free Software Foundation; version 2 of the License.
   9 *
  10 * This implements simple platform support for PowerPC 44x chips.  This is
  11 * mostly used for eval boards or other simple and "generic" 44x boards.  If
  12 * your board has custom functions or hardware, then you will likely want to
  13 * implement your own board.c file to accommodate it.
  14 */
  15
  16#include <asm/machdep.h>
  17#include <asm/pci-bridge.h>
  18#include <asm/ppc4xx.h>
  19#include <asm/prom.h>
  20#include <asm/time.h>
  21#include <asm/udbg.h>
  22#include <asm/uic.h>
  23
  24#include <linux/init.h>
  25#include <linux/of_platform.h>
  26
  27static __initdata struct of_device_id ppc40x_of_bus[] = {
  28        { .compatible = "ibm,plb3", },
  29        { .compatible = "ibm,plb4", },
  30        { .compatible = "ibm,opb", },
  31        { .compatible = "ibm,ebc", },
  32        { .compatible = "simple-bus", },
  33        {},
  34};
  35
  36static int __init ppc40x_device_probe(void)
  37{
  38        of_platform_bus_probe(NULL, ppc40x_of_bus, NULL);
  39
  40        return 0;
  41}
  42machine_device_initcall(ppc40x_simple, ppc40x_device_probe);
  43
  44/* This is the list of boards that can be supported by this simple
  45 * platform code.  This does _not_ mean the boards are compatible,
  46 * as they most certainly are not from a device tree perspective.
  47 * However, their differences are handled by the device tree and the
  48 * drivers and therefore they don't need custom board support files.
  49 *
  50 * Again, if your board needs to do things differently then create a
  51 * board.c file for it rather than adding it to this list.
  52 */
  53static const char *board[] __initdata = {
  54        "amcc,acadia",
  55        "amcc,haleakala",
  56        "amcc,kilauea",
  57        "amcc,makalu",
  58        "apm,klondike",
  59        "est,hotfoot",
  60        "plathome,obs600"
  61};
  62
  63static int __init ppc40x_probe(void)
  64{
  65        if (of_flat_dt_match(of_get_flat_dt_root(), board)) {
  66                pci_set_flags(PCI_REASSIGN_ALL_RSRC);
  67                return 1;
  68        }
  69
  70        return 0;
  71}
  72
  73define_machine(ppc40x_simple) {
  74        .name = "PowerPC 40x Platform",
  75        .probe = ppc40x_probe,
  76        .progress = udbg_progress,
  77        .init_IRQ = uic_init_tree,
  78        .get_irq = uic_get_irq,
  79        .restart = ppc4xx_reset_system,
  80        .calibrate_decr = generic_calibrate_decr,
  81};
  82