1e5674e1fSSoby Mathew /* 20a2ab6e6SAlexei Fedorov * Copyright (c) 2018-2020, ARM Limited and Contributors. All rights reserved. 3e5674e1fSSoby Mathew * 4e5674e1fSSoby Mathew * SPDX-License-Identifier: BSD-3-Clause 5e5674e1fSSoby Mathew */ 6e5674e1fSSoby Mathew 7e5674e1fSSoby Mathew /* Helper functions to offer easier navigation of Device Tree Blob */ 8e5674e1fSSoby Mathew 9c3cf06f1SAntonio Nino Diaz #ifndef FDT_WRAPPERS_H 10c3cf06f1SAntonio Nino Diaz #define FDT_WRAPPERS_H 11e5674e1fSSoby Mathew 12e5674e1fSSoby Mathew /* Number of cells, given total length in bytes. Each cell is 4 bytes long */ 1381542c00SAntonio Nino Diaz #define NCELLS(len) ((len) / 4U) 14e5674e1fSSoby Mathew 15ff4e6c35SAndre Przywara int fdt_read_uint32(const void *dtb, int node, const char *prop_name, 16ff4e6c35SAndre Przywara uint32_t *value); 17be858cffSAndre Przywara uint32_t fdt_read_uint32_default(const void *dtb, int node, 18be858cffSAndre Przywara const char *prop_name, uint32_t dflt_value); 19ff4e6c35SAndre Przywara int fdt_read_uint64(const void *dtb, int node, const char *prop_name, 20ff4e6c35SAndre Przywara uint64_t *value); 216e3a89f4SAndre Przywara int fdt_read_uint32_array(const void *dtb, int node, const char *prop_name, 226e3a89f4SAndre Przywara unsigned int cells, uint32_t *value); 2327473620SAntonio Nino Diaz int fdtw_read_string(const void *dtb, int node, const char *prop, 2427473620SAntonio Nino Diaz char *str, size_t size); 25e5674e1fSSoby Mathew int fdtw_write_inplace_cells(void *dtb, int node, const char *prop, 26e5674e1fSSoby Mathew unsigned int cells, void *value); 270a2ab6e6SAlexei Fedorov int fdtw_read_bytes(const void *dtb, int node, const char *prop, 280a2ab6e6SAlexei Fedorov unsigned int length, void *value); 290a2ab6e6SAlexei Fedorov int fdtw_write_inplace_bytes(void *dtb, int node, const char *prop, 300a2ab6e6SAlexei Fedorov unsigned int length, const void *data); 31364ad245SAndre Przywara int fdt_get_reg_props_by_index(const void *dtb, int node, int index, 32364ad245SAndre Przywara uintptr_t *base, size_t *size); 33*7ad6d362SAndre Przywara int fdt_get_reg_props_by_name(const void *dtb, int node, const char *name, 34*7ad6d362SAndre Przywara uintptr_t *base, size_t *size); 3527473620SAntonio Nino Diaz 36c3cf06f1SAntonio Nino Diaz #endif /* FDT_WRAPPERS_H */ 37