LXR linux/arch/powerpc/platforms/40x/ppc40x

   1// SPDX-License-Identifier: GPL-2.0-only
   2/*
   3 * Generic PowerPC 40x platform support
   4 *
   5 * Copyright 2008 IBM Corporation
   6 *
   7 * This implements simple platform support for PowerPC 44x chips.  This is
   8 * mostly used for eval boards or other simple and "generic" 44x boards.  If
   9 * your board has custom functions or hardware, then you will likely want to
  10 * implement your own board.c file to accommodate it.
  11 */
  12
  13#include <asm/machdep.h>
  14#include <asm/pci-bridge.h>
  15#include <asm/ppc4xx.h>
  16#include <asm/prom.h>
  17#include <asm/time.h>
  18#include <asm/udbg.h>
  19#include <asm/uic.h>
  20
  21#include <linux/init.h>
  22#include <linux/of_platform.h>
  23
  24static const struct of_device_id ppc40x_of_bus[] __initconst = {
  25        { .compatible = "ibm,plb3", },
  26        { .compatible = "ibm,plb4", },
  27        { .compatible = "ibm,opb", },
  28        { .compatible = "ibm,ebc", },
  29        { .compatible = "simple-bus", },
  30        {},
  31};
  32
  33static int __init ppc40x_device_probe(void)
  34{
  35        of_platform_bus_probe(NULL, ppc40x_of_bus, NULL);
  36
  37        return 0;
  38}
  39machine_device_initcall(ppc40x_simple, ppc40x_device_probe);
  40
  41/* This is the list of boards that can be supported by this simple
  42 * platform code.  This does _not_ mean the boards are compatible,
  43 * as they most certainly are not from a device tree perspective.
  44 * However, their differences are handled by the device tree and the
  45 * drivers and therefore they don't need custom board support files.
  46 *
  47 * Again, if your board needs to do things differently then create a
  48 * board.c file for it rather than adding it to this list.
  49 */
  50static const char * const board[] __initconst = {
  51        "amcc,acadia",
  52        "amcc,haleakala",
  53        "amcc,kilauea",
  54        "amcc,makalu",
  55        "apm,klondike",
  56        "est,hotfoot",
  57        "plathome,obs600",
  58        NULL
  59};
  60
  61static int __init ppc40x_probe(void)
  62{
  63        if (of_device_compatible_match(of_root, board)) {
  64                pci_set_flags(PCI_REASSIGN_ALL_RSRC);
  65                return 1;
  66        }
  67
  68        return 0;
  69}
  70
  71define_machine(ppc40x_simple) {
  72        .name = "PowerPC 40x Platform",
  73        .probe = ppc40x_probe,
  74        .progress = udbg_progress,
  75        .init_IRQ = uic_init_tree,
  76        .get_irq = uic_get_irq,
  77        .restart = ppc4xx_reset_system,
  78        .calibrate_decr = generic_calibrate_decr,
  79};
  80