1 /* 2 * Copyright (c) 2018, ARM Limited and Contributors. All rights reserved. 3 * 4 * SPDX-License-Identifier: BSD-3-Clause 5 */ 6 7 /* Helper functions to offer easier navigation of Device Tree Blob */ 8 9 #ifndef __FDT_WRAPPERS__ 10 #define __FDT_WRAPPERS__ 11 12 /* Number of cells, given total length in bytes. Each cell is 4 bytes long */ 13 #define NCELLS(len) ((len) / 4U) 14 15 int fdtw_read_cells(const void *dtb, int node, const char *prop, 16 unsigned int cells, void *value); 17 int fdtw_write_inplace_cells(void *dtb, int node, const char *prop, 18 unsigned int cells, void *value); 19 #endif /* __FDT_WRAPPERS__ */ 20