1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * Copyright (c) 2014
4 * Heiko Schocher, DENX Software Engineering, hs@denx.de.
5 *
6 * Based on lib/fdtdec.c:
7 * Copyright (c) 2011 The Chromium OS Authors.
8 */
9
10 #ifndef USE_HOSTCC
11 #include <common.h>
12 #include <log.h>
13 #include <linux/libfdt.h>
14 #include <fdtdec.h>
15 #else
16 #include "libfdt.h"
17 #include "fdt_support.h"
18
19 #define debug(...)
20 #endif
21
fdtdec_get_int(const void * blob,int node,const char * prop_name,int default_val)22 int fdtdec_get_int(const void *blob, int node, const char *prop_name,
23 int default_val)
24 {
25 const int *cell;
26 int len;
27
28 debug("%s: %s: ", __func__, prop_name);
29 cell = fdt_getprop(blob, node, prop_name, &len);
30 if (cell && len >= sizeof(int)) {
31 int val = fdt32_to_cpu(cell[0]);
32
33 debug("%#x (%d)\n", val, val);
34 return val;
35 }
36 debug("(not found)\n");
37 return default_val;
38 }
39
fdtdec_get_uint(const void * blob,int node,const char * prop_name,unsigned int default_val)40 unsigned int fdtdec_get_uint(const void *blob, int node, const char *prop_name,
41 unsigned int default_val)
42 {
43 const int *cell;
44 int len;
45
46 debug("%s: %s: ", __func__, prop_name);
47 cell = fdt_getprop(blob, node, prop_name, &len);
48 if (cell && len >= sizeof(unsigned int)) {
49 unsigned int val = fdt32_to_cpu(cell[0]);
50
51 debug("%#x (%d)\n", val, val);
52 return val;
53 }
54 debug("(not found)\n");
55 return default_val;
56 }
57
fdtdec_get_child_count(const void * blob,int node)58 int fdtdec_get_child_count(const void *blob, int node)
59 {
60 int subnode;
61 int num = 0;
62
63 fdt_for_each_subnode(subnode, blob, node)
64 num++;
65
66 return num;
67 }
68