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libfdt: Add support for using aliases in fdt_path_offset()

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If the path doesn't start with '/' check to see if it matches some alias
under "/aliases" and substitute the matching alias value in the path
and retry the lookup.

Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
Acked-by: David Gibson <david@gibson.dropbear.id.au>
This commit is contained in:
Kumar Gala
2008-08-14 08:28:19 -05:00
committed by Jon Loeliger
parent cb650ae143
commit 02cc83540b
5 changed files with 104 additions and 3 deletions
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59
tests/path_offset_aliases.c Normal file
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/*
* libfdt - Flat Device Tree manipulation
* Testcase for fdt_path_offset()
* Copyright (C) 2006 David Gibson, IBM Corporation.
* Copyright 2008 Kumar Gala, Freescale Semiconductor, Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public License
* as published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <stdint.h>
#include <fdt.h>
#include <libfdt.h>
#include "tests.h"
#include "testdata.h"
void check_alias(void *fdt, const char *full_path, const char *alias_path)
{
int offset, offset_a;
offset = fdt_path_offset(fdt, full_path);
offset_a = fdt_path_offset(fdt, alias_path);
if (offset != offset_a)
FAIL("Mismatch between %s path_offset (%d) and %s path_offset alias (%d)",
full_path, offset, alias_path, offset_a);
}
int main(int argc, char *argv[])
{
void *fdt;
test_init(argc, argv);
fdt = load_blob_arg(argc, argv);
check_alias(fdt, "/subnode@1", "s1");
check_alias(fdt, "/subnode@1/subsubnode", "ss1");
check_alias(fdt, "/subnode@1/subsubnode", "s1/subsubnode");
check_alias(fdt, "/subnode@1/subsubnode/subsubsubnode", "sss1");
check_alias(fdt, "/subnode@1/subsubnode/subsubsubnode", "ss1/subsubsubnode");
check_alias(fdt, "/subnode@1/subsubnode/subsubsubnode", "s1/subsubnode/subsubsubnode");
PASS();
}