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 27static const struct of_device_id ppc40x_of_bus[] __initconst = { 28 { .compatible = "ibm,plb3", }, 29 { .compatible = "ibm,plb4", }, 30 { .compatible = "ibm,opb", }, 31 { .compatible = "ibm,ebc", }, 32 { .compatible = "simple-bus", }, 33 {}, 34}; 35 36static int __init ppc40x_device_probe(void) 37{ 38 of_platform_bus_probe(NULL, ppc40x_of_bus, NULL); 39 40 return 0; 41} 42machine_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 */ 53static 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 64static 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 74define_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