aboutsummaryrefslogtreecommitdiff
path: root/include/common/fdt_wrappers.h
blob: 79d001d285c5653eed04a4f279dab4ab9285adf8 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
/*
 * Copyright (c) 2018, ARM Limited and Contributors. All rights reserved.
 *
 * SPDX-License-Identifier: BSD-3-Clause
 */

/* Helper functions to offer easier navigation of Device Tree Blob */

#ifndef FDT_WRAPPERS_H
#define FDT_WRAPPERS_H

/* Number of cells, given total length in bytes. Each cell is 4 bytes long */
#define NCELLS(len) ((len) / 4U)

int fdtw_read_cells(const void *dtb, int node, const char *prop,
		unsigned int cells, void *value);
int fdtw_read_array(const void *dtb, int node, const char *prop,
		unsigned int cells, void *value);
int fdtw_read_string(const void *dtb, int node, const char *prop,
		char *str, size_t size);
int fdtw_write_inplace_cells(void *dtb, int node, const char *prop,
		unsigned int cells, void *value);

#endif /* FDT_WRAPPERS_H */