ppc40x_simple.c

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/*
 * Generic PowerPC 40x platform support
 *
 * Copyright 2008 IBM Corporation
 *
 * This program 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; version 2 of the License.
 *
 * This implements simple platform support for PowerPC 44x chips.  This is
 * mostly used for eval boards or other simple and "generic" 44x boards.  If
 * your board has custom functions or hardware, then you will likely want to
 * implement your own board.c file to accommodate it.
 */

#include <asm/machdep.h>
#include <asm/pci-bridge.h>
#include <asm/ppc4xx.h>
#include <asm/prom.h>
#include <asm/time.h>
#include <asm/udbg.h>
#include <asm/uic.h>

#include <linux/init.h>
#include <linux/of_platform.h>

static __initdata struct of_device_id ppc40x_of_bus[] = {
    { .compatible = "ibm,plb3", },
    { .compatible = "ibm,plb4", },
    { .compatible = "ibm,opb", },
    { .compatible = "ibm,ebc", },
    { .compatible = "simple-bus", },
    {},
};

static int __init ppc40x_device_probe(void)
{
    of_platform_bus_probe(NULL, ppc40x_of_bus, NULL);

    return 0;
}
machine_device_initcall(ppc40x_simple, ppc40x_device_probe);

/* This is the list of boards that can be supported by this simple
 * platform code.  This does _not_ mean the boards are compatible,
 * as they most certainly are not from a device tree perspective.
 * However, their differences are handled by the device tree and the
 * drivers and therefore they don't need custom board support files.
 *
 * Again, if your board needs to do things differently then create a
 * board.c file for it rather than adding it to this list.
 */
static const char * const board[] __initconst = {
    "amcc,acadia",
    "amcc,haleakala",
    "amcc,kilauea",
    "amcc,makalu",
    "apm,klondike",
    "est,hotfoot",
    "plathome,obs600"
};

static int __init ppc40x_probe(void)
{
    if (of_flat_dt_match(of_get_flat_dt_root(), board)) {
        pci_set_flags(PCI_REASSIGN_ALL_RSRC);
        return 1;
    }

    return 0;
}

define_machine(ppc40x_simple) {
    .name = "PowerPC 40x Platform",
    .probe = ppc40x_probe,
    .progress = udbg_progress,
    .init_IRQ = uic_init_tree,
    .get_irq = uic_get_irq,
    .restart = ppc4xx_reset_system,
    .calibrate_decr = generic_calibrate_decr,
};