1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * MIPS support for CONFIG_OF device tree support
4 *
5 * Copyright (C) 2010 Cisco Systems Inc. <dediao@cisco.com>
6 */
7
8 #include <linux/init.h>
9 #include <linux/export.h>
10 #include <linux/errno.h>
11 #include <linux/types.h>
12 #include <linux/memblock.h>
13 #include <linux/debugfs.h>
14 #include <linux/of.h>
15 #include <linux/of_fdt.h>
16 #include <linux/of_platform.h>
17
18 #include <asm/bootinfo.h>
19 #include <asm/page.h>
20 #include <asm/prom.h>
21
22 static char mips_machine_name[64] = "Unknown";
23
mips_set_machine_name(const char * name)24 __init void mips_set_machine_name(const char *name)
25 {
26 if (name == NULL)
27 return;
28
29 strscpy(mips_machine_name, name, sizeof(mips_machine_name));
30 pr_info("MIPS: machine is %s\n", mips_get_machine_name());
31 }
32
mips_get_machine_name(void)33 char *mips_get_machine_name(void)
34 {
35 return mips_machine_name;
36 }
37
38 #ifdef CONFIG_USE_OF
39
__dt_setup_arch(void * bph)40 void __init __dt_setup_arch(void *bph)
41 {
42 if (!early_init_dt_scan(bph))
43 return;
44
45 mips_set_machine_name(of_flat_dt_get_machine_name());
46 }
47
__dt_register_buses(const char * bus0,const char * bus1)48 int __init __dt_register_buses(const char *bus0, const char *bus1)
49 {
50 static struct of_device_id of_ids[3];
51
52 if (!of_have_populated_dt())
53 panic("device tree not present");
54
55 strscpy(of_ids[0].compatible, bus0, sizeof(of_ids[0].compatible));
56 if (bus1) {
57 strscpy(of_ids[1].compatible, bus1,
58 sizeof(of_ids[1].compatible));
59 }
60
61 if (of_platform_populate(NULL, of_ids, NULL, NULL))
62 panic("failed to populate DT");
63
64 return 0;
65 }
66
device_tree_init(void)67 void __weak __init device_tree_init(void)
68 {
69 unflatten_and_copy_device_tree();
70 }
71
72 #endif
73