arch/powerpc/platforms/52xx/mpc5200_simple.c

   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 };