Commit | Line | Data |
---|---|---|
999159a5 VG |
1 | /* |
2 | * Copyright (C) 2012 Synopsys, Inc. (www.synopsys.com) | |
3 | * | |
4 | * Based on reduced version of METAG | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License version 2 as | |
8 | * published by the Free Software Foundation. | |
9 | */ | |
10 | ||
11 | ||
12 | #include <linux/init.h> | |
13 | #include <linux/reboot.h> | |
14 | #include <linux/memblock.h> | |
15 | #include <linux/of.h> | |
16 | #include <linux/of_fdt.h> | |
450dd430 | 17 | #include <asm/clk.h> |
03a6d28c | 18 | #include <asm/mach_desc.h> |
999159a5 | 19 | |
880beb88 RH |
20 | static const void * __init arch_get_next_mach(const char *const **match) |
21 | { | |
22 | static const struct machine_desc *mdesc = __arch_info_begin; | |
23 | const struct machine_desc *m = mdesc; | |
24 | ||
25 | if (m >= __arch_info_end) | |
26 | return NULL; | |
27 | ||
28 | mdesc++; | |
29 | *match = m->dt_compat; | |
30 | return m; | |
31 | } | |
32 | ||
999159a5 VG |
33 | /** |
34 | * setup_machine_fdt - Machine setup when an dtb was passed to the kernel | |
35 | * @dt: virtual address pointer to dt blob | |
36 | * | |
37 | * If a dtb was passed to the kernel, then use it to choose the correct | |
38 | * machine_desc and to setup the system. | |
39 | */ | |
880beb88 | 40 | const struct machine_desc * __init setup_machine_fdt(void *dt) |
999159a5 | 41 | { |
880beb88 | 42 | const struct machine_desc *mdesc; |
999159a5 | 43 | unsigned long dt_root; |
450dd430 | 44 | void *clk; |
450dd430 | 45 | unsigned long len; |
999159a5 | 46 | |
ad81fcb5 | 47 | if (!early_init_dt_scan(dt)) |
03a6d28c | 48 | return NULL; |
999159a5 | 49 | |
880beb88 RH |
50 | mdesc = of_flat_dt_match_machine(NULL, arch_get_next_mach); |
51 | if (!mdesc) | |
03a6d28c | 52 | machine_halt(); |
999159a5 | 53 | |
880beb88 | 54 | dt_root = of_get_flat_dt_root(); |
450dd430 VG |
55 | clk = of_get_flat_dt_prop(dt_root, "clock-frequency", &len); |
56 | if (clk) | |
57 | arc_set_core_freq(of_read_ulong(clk, len/4)); | |
58 | ||
880beb88 | 59 | return mdesc; |
999159a5 | 60 | } |