linux/arch/powerpc/platforms/44x/ppc44x_simple.c
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   1/*
   2 * Generic PowerPC 44x 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 ppc44x_of_bus[] = {
  28        { .compatible = "ibm,plb4", },
  29        { .compatible = "ibm,opb", },
  30        { .compatible = "ibm,ebc", },
  31        { .compatible = "simple-bus", },
  32        {},
  33};
  34
  35static int __init ppc44x_device_probe(void)
  36{
  37        of_platform_bus_probe(NULL, ppc44x_of_bus, NULL);
  38
  39        return 0;
  40}
  41machine_device_initcall(ppc44x_simple, ppc44x_device_probe);
  42
  43/* This is the list of boards that can be supported by this simple
  44 * platform code.  This does _not_ mean the boards are compatible,
  45 * as they most certainly are not from a device tree perspective.
  46 * However, their differences are handled by the device tree and the
  47 * drivers and therefore they don't need custom board support files.
  48 *
  49 * Again, if your board needs to do things differently then create a
  50 * board.c file for it rather than adding it to this list.
  51 */
  52static char *board[] __initdata = {
  53        "amcc,arches",
  54        "amcc,bamboo",
  55        "amcc,bluestone",
  56        "amcc,glacier",
  57        "ibm,ebony",
  58        "amcc,eiger",
  59        "amcc,katmai",
  60        "amcc,rainier",
  61        "amcc,redwood",
  62        "amcc,sequoia",
  63        "amcc,taishan",
  64        "amcc,yosemite",
  65        "mosaixtech,icon"
  66};
  67
  68static int __init ppc44x_probe(void)
  69{
  70        unsigned long root = of_get_flat_dt_root();
  71        int i = 0;
  72
  73        for (i = 0; i < ARRAY_SIZE(board); i++) {
  74                if (of_flat_dt_is_compatible(root, board[i])) {
  75                        pci_set_flags(PCI_REASSIGN_ALL_RSRC);
  76                        return 1;
  77                }
  78        }
  79
  80        return 0;
  81}
  82
  83define_machine(ppc44x_simple) {
  84        .name = "PowerPC 44x Platform",
  85        .probe = ppc44x_probe,
  86        .progress = udbg_progress,
  87        .init_IRQ = uic_init_tree,
  88        .get_irq = uic_get_irq,
  89        .restart = ppc4xx_reset_system,
  90        .calibrate_decr = generic_calibrate_decr,
  91};
  92