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Linux/arch/powerpc/platforms/44x/ppc44x_simple.c

  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 
 27 static __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 
 35 static int __init ppc44x_device_probe(void)
 36 {
 37         of_platform_bus_probe(NULL, ppc44x_of_bus, NULL);
 38 
 39         return 0;
 40 }
 41 machine_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  */
 52 static char *board[] __initdata = {
 53         "amcc,arches",
 54         "amcc,bamboo",
 55         "apm,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 
 68 static 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 
 83 define_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 

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