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 <asm/time.h>
26 #include <asm/prom.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 mpc52xx_setup_pci();
45 }
46
47 /* list of the supported boards */
48 static const char *board[] __initdata = {
49 "anonymous,a3m071",
50 "anonymous,a4m072",
51 "anon,charon",
52 "ifm,o2d",
53 "intercontrol,digsy-mtc",
54 "manroland,mucmc52",
55 "manroland,uc101",
56 "phytec,pcm030",
57 "phytec,pcm032",
58 "promess,motionpro",
59 "schindler,cm5200",
60 "tqc,tqm5200",
61 NULL
62 };
63
64 /*
65 * Called very early, MMU is off, device-tree isn't unflattened
66 */
67 static int __init mpc5200_simple_probe(void)
68 {
69 return of_device_compatible_match(of_root, board);
70 }
71
72 define_machine(mpc5200_simple_platform) {
73 .name = "mpc5200-simple-platform",
74 .probe = mpc5200_simple_probe,
75 .setup_arch = mpc5200_simple_setup_arch,
76 .init = mpc52xx_declare_of_platform_devices,
77 .init_IRQ = mpc52xx_init_irq,
78 .get_irq = mpc52xx_get_irq,
79 .restart = mpc52xx_restart,
80 .calibrate_decr = generic_calibrate_decr,
81 };