1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * Support for 'mpc5200-simple-platform' compatible boards. 4 * 5 * Written by Marian Balakowicz <m8@semihalf.com> 6 * Copyright (C) 2007 Semihalf 7 * 8 * Description: 9 * This code implements support for a simple MPC52xx based boards which 10 * do not need a custom platform specific setup. Such boards are 11 * supported assuming the following: 12 * 13 * - GPIO pins are configured by the firmware, 14 * - CDM configuration (clocking) is setup correctly by firmware, 15 * - if the 'fsl,has-wdt' property is present in one of the 16 * gpt nodes, then it is safe to use such gpt to reset the board, 17 * - PCI is supported if enabled in the kernel configuration 18 * and if there is a PCI bus node defined in the device tree. 19 * 20 * Boards that are compatible with this generic platform support 21 * are listed in a 'board' table. 22 */ 23 24 #undef DEBUG 25 #include <linux/of.h> 26 #include <asm/time.h> 27 #include <asm/machdep.h> 28 #include <asm/mpc52xx.h> 29 30 /* 31 * Setup the architecture 32 */ 33 static void __init mpc5200_simple_setup_arch(void) 34 { 35 if (ppc_md.progress) 36 ppc_md.progress("mpc5200_simple_setup_arch()", 0); 37 38 /* Map important registers from the internal memory map */ 39 mpc52xx_map_common_devices(); 40 41 /* Some mpc5200 & mpc5200b related configuration */ 42 mpc5200_setup_xlb_arbiter(); 43 } 44 45 /* list of the supported boards */ 46 static const char *board[] __initdata = { 47 "anonymous,a3m071", 48 "anonymous,a4m072", 49 "anon,charon", 50 "ifm,o2d", 51 "intercontrol,digsy-mtc", 52 "manroland,mucmc52", 53 "manroland,uc101", 54 "phytec,pcm030", 55 "phytec,pcm032", 56 "promess,motionpro", 57 "schindler,cm5200", 58 "tqc,tqm5200", 59 NULL 60 }; 61 62 /* 63 * Called very early, MMU is off, device-tree isn't unflattened 64 */ 65 static int __init mpc5200_simple_probe(void) 66 { 67 return of_device_compatible_match(of_root, board); 68 } 69 70 define_machine(mpc5200_simple_platform) { 71 .name = "mpc5200-simple-platform", 72 .probe = mpc5200_simple_probe, 73 .setup_arch = mpc5200_simple_setup_arch, 74 .discover_phbs = mpc52xx_setup_pci, 75 .init = mpc52xx_declare_of_platform_devices, 76 .init_IRQ = mpc52xx_init_irq, 77 .get_irq = mpc52xx_get_irq, 78 .restart = mpc52xx_restart, 79 .calibrate_decr = generic_calibrate_decr, 80 }; 81