1 /* 2 * Support for 'mpc5200-simple-platform' compatible boards. 3 * 4 * Written by Marian Balakowicz <m8@semihalf.com> 5 * Copyright (C) 2007 Semihalf 6 * 7 * This program is free software; you can redistribute it and/or modify it 8 * under the terms of the GNU General Public License as published by the 9 * Free Software Foundation; either version 2 of the License, or (at your 10 * option) any later version. 11 * 12 * Description: 13 * This code implements support for a simple MPC52xx based boards which 14 * do not need a custom platform specific setup. Such boards are 15 * supported assuming the following: 16 * 17 * - GPIO pins are configured by the firmware, 18 * - CDM configuration (clocking) is setup correctly by firmware, 19 * - if the 'fsl,has-wdt' property is present in one of the 20 * gpt nodes, then it is safe to use such gpt to reset the board, 21 * - PCI is supported if enabled in the kernel configuration 22 * and if there is a PCI bus node defined in the device tree. 23 * 24 * Boards that are compatible with this generic platform support 25 * are listed in a 'board' table. 26 */ 27 28 #undef DEBUG 29 #include <asm/time.h> 30 #include <asm/prom.h> 31 #include <asm/machdep.h> 32 #include <asm/mpc52xx.h> 33 34 /* 35 * Setup the architecture 36 */ 37 static void __init mpc5200_simple_setup_arch(void) 38 { 39 if (ppc_md.progress) 40 ppc_md.progress("mpc5200_simple_setup_arch()", 0); 41 42 /* Map important registers from the internal memory map */ 43 mpc52xx_map_common_devices(); 44 45 /* Some mpc5200 & mpc5200b related configuration */ 46 mpc5200_setup_xlb_arbiter(); 47 48 mpc52xx_setup_pci(); 49 } 50 51 /* list of the supported boards */ 52 static char *board[] __initdata = { 53 "promess,motionpro", 54 "schindler,cm5200", 55 "tqc,tqm5200", 56 NULL 57 }; 58 59 /* 60 * Called very early, MMU is off, device-tree isn't unflattened 61 */ 62 static int __init mpc5200_simple_probe(void) 63 { 64 unsigned long node = of_get_flat_dt_root(); 65 int i = 0; 66 67 while (board[i]) { 68 if (of_flat_dt_is_compatible(node, board[i])) 69 break; 70 i++; 71 } 72 73 return (board[i] != NULL); 74 } 75 76 define_machine(mpc5200_simple_platform) { 77 .name = "mpc5200-simple-platform", 78 .probe = mpc5200_simple_probe, 79 .setup_arch = mpc5200_simple_setup_arch, 80 .init = mpc52xx_declare_of_platform_devices, 81 .init_IRQ = mpc52xx_init_irq, 82 .get_irq = mpc52xx_get_irq, 83 .restart = mpc52xx_restart, 84 .calibrate_decr = generic_calibrate_decr, 85 }; 86