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libfdt: Add iterator over properties

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Implement a macro based on fdt_first_property_offset and
fdt_next_property_offset that provides a convenience to iterate over all
the properties of a given node.

Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Acked-by: Simon Glass <sjg@chromium.org>
[dwg: Removed a stray trailing blank line]
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
This commit is contained in:
Maxime Ripard
2016-07-27 14:55:54 +02:00
committed by David Gibson
parent 902d0f0953
commit d29126c90a
6 changed files with 152 additions and 0 deletions
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97
tests/property_iterate.c Normal file
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/*
* libfdt - Flat Device Tree manipulation
* Tests that fdt_next_subnode() works as expected
*
* Copyright (C) 2013 Google, Inc
*
* Copyright (C) 2007 David Gibson, IBM Corporation.
*
* 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 <libfdt.h>
#include "tests.h"
#include "testdata.h"
static void test_node(void *fdt, int parent_offset)
{
fdt32_t properties;
const fdt32_t *prop;
int offset, property;
int count;
int len;
/*
* This property indicates the number of properties in our
* test node to expect
*/
prop = fdt_getprop(fdt, parent_offset, "test-properties", &len);
if (!prop || len != sizeof(fdt32_t)) {
FAIL("Missing/invalid test-properties property at '%s'",
fdt_get_name(fdt, parent_offset, NULL));
}
properties = cpu_to_fdt32(*prop);
count = 0;
offset = fdt_first_subnode(fdt, parent_offset);
if (offset < 0)
FAIL("Missing test node\n");
fdt_for_each_property_offset(property, fdt, offset)
count++;
if (count != properties) {
FAIL("Node '%s': Expected %d properties, got %d\n",
fdt_get_name(fdt, parent_offset, NULL), properties,
count);
}
}
static void check_fdt_next_subnode(void *fdt)
{
int offset;
int count = 0;
fdt_for_each_subnode(offset, fdt, 0) {
test_node(fdt, offset);
count++;
}
if (count != 2)
FAIL("Expected %d tests, got %d\n", 2, count);
}
int main(int argc, char *argv[])
{
void *fdt;
test_init(argc, argv);
if (argc != 2)
CONFIG("Usage: %s <dtb file>", argv[0]);
fdt = load_blob(argv[1]);
if (!fdt)
FAIL("No device tree available");
check_fdt_next_subnode(fdt);
PASS();
}