board/ti/common/fdt_ops.c

// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * Library to support FDT file operations which are common
 *
 * Copyright (C) 2024 Texas Instruments Incorporated - https://www.ti.com/
 */

#include <env.h>
#include <vsprintf.h>
#include "fdt_ops.h"

void ti_set_fdt_env(const char *board_name, struct ti_fdt_map *fdt_map)
{
	char *fdt_file_name = NULL;
	char fdtfile[TI_FDT_FILE_MAX];

	if (board_name) {
		while (fdt_map) {
			/* Check for NULL terminator in the list */
			if (!fdt_map->board_name)
				break;
			if (!strncmp(fdt_map->board_name, board_name, TI_BOARD_NAME_MAX)) {
				fdt_file_name = fdt_map->fdt_file_name;
				break;
			}
			fdt_map++;
		}
	}

	/* match not found OR null board_name */
	if (!fdt_file_name) {
		/*
		 * Prioritize CONFIG_DEFAULT_FDT_FILE - if that is not defined,
		 * or is empty, then use CONFIG_DEFAULT_DEVICE_TREE
		 */
#ifdef CONFIG_DEFAULT_FDT_FILE
		if (strlen(CONFIG_DEFAULT_FDT_FILE)) {
			snprintf(fdtfile, sizeof(fdtfile), "%s/%s",
				 CONFIG_TI_FDT_FOLDER_PATH, CONFIG_DEFAULT_FDT_FILE);
		} else
#endif
		{
			snprintf(fdtfile, sizeof(fdtfile), "%s/%s.dtb",
				 CONFIG_TI_FDT_FOLDER_PATH, CONFIG_DEFAULT_DEVICE_TREE);
		}
	} else {
		snprintf(fdtfile, sizeof(fdtfile), "%s/%s", CONFIG_TI_FDT_FOLDER_PATH,
			 fdt_file_name);
	}

	env_set("fdtfile", fdtfile);

	/*
	 * XXX: DEPRECATION WARNING: 2 u-boot versions (2024.10).
	 *
	 * Maintain compatibility with downstream scripts that may be using
	 * name_fdt
	 */
	if (board_name)
		env_set("name_fdt", fdtfile);
	/* Also set the findfdt legacy script to warn users to stop using this */
	env_set("findfdt",
		"echo WARN: fdtfile already set. Stop using findfdt in script");
}