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Linux/arch/powerpc/platforms/40x/ppc40x_simple.c

  1 /*
  2  * Generic PowerPC 40x 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 ppc40x_of_bus[] = {
 28         { .compatible = "ibm,plb3", },
 29         { .compatible = "ibm,plb4", },
 30         { .compatible = "ibm,opb", },
 31         { .compatible = "ibm,ebc", },
 32         { .compatible = "simple-bus", },
 33         {},
 34 };
 35 
 36 static int __init ppc40x_device_probe(void)
 37 {
 38         of_platform_bus_probe(NULL, ppc40x_of_bus, NULL);
 39 
 40         return 0;
 41 }
 42 machine_device_initcall(ppc40x_simple, ppc40x_device_probe);
 43 
 44 /* This is the list of boards that can be supported by this simple
 45  * platform code.  This does _not_ mean the boards are compatible,
 46  * as they most certainly are not from a device tree perspective.
 47  * However, their differences are handled by the device tree and the
 48  * drivers and therefore they don't need custom board support files.
 49  *
 50  * Again, if your board needs to do things differently then create a
 51  * board.c file for it rather than adding it to this list.
 52  */
 53 static const char * const board[] __initconst = {
 54         "amcc,acadia",
 55         "amcc,haleakala",
 56         "amcc,kilauea",
 57         "amcc,makalu",
 58         "apm,klondike",
 59         "est,hotfoot",
 60         "plathome,obs600",
 61         NULL
 62 };
 63 
 64 static int __init ppc40x_probe(void)
 65 {
 66         if (of_flat_dt_match(of_get_flat_dt_root(), board)) {
 67                 pci_set_flags(PCI_REASSIGN_ALL_RSRC);
 68                 return 1;
 69         }
 70 
 71         return 0;
 72 }
 73 
 74 define_machine(ppc40x_simple) {
 75         .name = "PowerPC 40x Platform",
 76         .probe = ppc40x_probe,
 77         .progress = udbg_progress,
 78         .init_IRQ = uic_init_tree,
 79         .get_irq = uic_get_irq,
 80         .restart = ppc4xx_reset_system,
 81         .calibrate_decr = generic_calibrate_decr,
 82 };
 83 

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