| /* |
| * Copyright (c) 2018-2020, 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 fdt_read_uint32(const void *dtb, int node, const char *prop_name, |
| uint32_t *value); |
| int fdt_read_uint64(const void *dtb, int node, const char *prop_name, |
| uint64_t *value); |
| int fdt_read_uint32_array(const void *dtb, int node, const char *prop_name, |
| unsigned int cells, uint32_t *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); |
| int fdtw_read_bytes(const void *dtb, int node, const char *prop, |
| unsigned int length, void *value); |
| int fdtw_write_inplace_bytes(void *dtb, int node, const char *prop, |
| unsigned int length, const void *data); |
| |
| #endif /* FDT_WRAPPERS_H */ |