2024-09-09 08:52:07 +00:00
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/*
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* Generic PowerPC 44x platform support
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*
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* Copyright 2008 IBM Corporation
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; version 2 of the License.
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*
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* This implements simple platform support for PowerPC 44x chips. This is
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* mostly used for eval boards or other simple and "generic" 44x boards. If
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* your board has custom functions or hardware, then you will likely want to
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* implement your own board.c file to accommodate it.
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*/
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#include <asm/machdep.h>
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#include <asm/pci-bridge.h>
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#include <asm/ppc4xx.h>
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#include <asm/prom.h>
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#include <asm/time.h>
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#include <asm/udbg.h>
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#include <asm/uic.h>
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#include <linux/init.h>
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#include <linux/of_platform.h>
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2024-09-09 08:57:42 +00:00
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static const struct of_device_id ppc44x_of_bus[] __initconst = {
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2024-09-09 08:52:07 +00:00
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{ .compatible = "ibm,plb4", },
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{ .compatible = "ibm,opb", },
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{ .compatible = "ibm,ebc", },
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{ .compatible = "simple-bus", },
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{},
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};
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static int __init ppc44x_device_probe(void)
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{
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of_platform_bus_probe(NULL, ppc44x_of_bus, NULL);
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return 0;
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}
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machine_device_initcall(ppc44x_simple, ppc44x_device_probe);
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/* This is the list of boards that can be supported by this simple
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* platform code. This does _not_ mean the boards are compatible,
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* as they most certainly are not from a device tree perspective.
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* However, their differences are handled by the device tree and the
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* drivers and therefore they don't need custom board support files.
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*
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* Again, if your board needs to do things differently then create a
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* board.c file for it rather than adding it to this list.
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*/
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static char *board[] __initdata = {
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"amcc,arches",
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"amcc,bamboo",
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"apm,bluestone",
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"amcc,glacier",
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"ibm,ebony",
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"amcc,eiger",
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"amcc,katmai",
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"amcc,rainier",
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"amcc,redwood",
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"amcc,sequoia",
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"amcc,taishan",
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"amcc,yosemite",
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"mosaixtech,icon"
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};
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static int __init ppc44x_probe(void)
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{
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unsigned long root = of_get_flat_dt_root();
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int i = 0;
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for (i = 0; i < ARRAY_SIZE(board); i++) {
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if (of_flat_dt_is_compatible(root, board[i])) {
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pci_set_flags(PCI_REASSIGN_ALL_RSRC);
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return 1;
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}
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}
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return 0;
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}
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define_machine(ppc44x_simple) {
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.name = "PowerPC 44x Platform",
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.probe = ppc44x_probe,
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.progress = udbg_progress,
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.init_IRQ = uic_init_tree,
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.get_irq = uic_get_irq,
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.restart = ppc4xx_reset_system,
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.calibrate_decr = generic_calibrate_decr,
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};
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