40f7f576c8
This patch makes a small start on libfdt functions which actually help to parse the contents of device trees, rather than purely manipulating the tree's structure. We add simple helpers to read and sanity check the #address-cells and #size-cells values for a given node. Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
64 lines
1.8 KiB
C
64 lines
1.8 KiB
C
/*
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* libfdt - Flat Device Tree manipulation
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* Testcase for #address-cells and #size-cells handling
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* Copyright (C) 2014 David Gibson, <david@gibson.dropbear.id.au>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public License
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* as published by the Free Software Foundation; either version 2.1 of
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* the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#include <stdint.h>
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#include <libfdt.h>
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#include "tests.h"
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#include "testdata.h"
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static void check_node(const void *fdt, const char *path, int ac, int sc)
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{
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int offset;
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int xac, xsc;
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offset = fdt_path_offset(fdt, path);
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if (offset < 0)
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FAIL("Couldn't find path %s", path);
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xac = fdt_address_cells(fdt, offset);
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xsc = fdt_size_cells(fdt, offset);
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if (xac != ac)
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FAIL("Address cells for %s is %d instead of %d\n",
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path, xac, ac);
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if (xsc != sc)
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FAIL("Size cells for %s is %d instead of %d\n",
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path, xsc, sc);
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}
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int main(int argc, char *argv[])
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{
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void *fdt;
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if (argc != 2)
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CONFIG("Usage: %s <dtb file>\n", argv[0]);
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test_init(argc, argv);
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fdt = load_blob(argv[1]);
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check_node(fdt, "/", 2, 2);
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check_node(fdt, "/identity-bus@0", 2, 2);
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check_node(fdt, "/simple-bus@1000000", 2, 1);
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PASS();
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}
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