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/* SPDX-License-Identifier: copyleft-next-0.3.1 */
/* Copyright 2021 - 2022, Kim Kuparinen < kimi.h.kuparinen@gmail.com > */
/**
* @file fdt.c
* Helper functions for handling the global FDT.
*/
#include <libfdt.h>
struct cell_info get_cellinfo(const void *fdt, const int offset)
{
return (struct cell_info){ fdt_size_cells(fdt, offset),
fdt_address_cells(fdt, offset) };
}
/* how "reg" is interpreted depends on the parent node */
struct cell_info get_reginfo(const void *fdt, const char *path)
{
const char *i = strrchr(path, '/');
if (!i)
return (struct cell_info){ 0, 0 };
size_t baselen = i - path;
if (baselen == 0)
/* root node */
baselen = 1;
return get_cellinfo(fdt, fdt_path_offset_namelen(fdt, path, baselen));
}
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