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