2 * libfdt - Flat Device Tree manipulation
3 * Testcase for DT overlays()
4 * Copyright (C) 2016 Free Electrons
5 * Copyright (C) 2016 NextThing Co.
7 * This library is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public License
9 * as published by the Free Software Foundation; either version 2.1 of
10 * the License, or (at your option) any later version.
12 * This library is distributed in the hope that it will be useful, but
13 * WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with this library; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
28 #define CHECK(code, expected) \
31 if (err != expected) \
32 FAIL(#code ": %s", fdt_strerror(err)); \
35 /* 4k ought to be enough for anybody */
36 #define FDT_COPY_SIZE (4 * 1024)
38 static void *open_dt(char *path)
44 copy = xmalloc(FDT_COPY_SIZE);
47 * Resize our DTs to 4k so that we have room to operate on
49 CHECK(fdt_open_into(dt, copy, FDT_COPY_SIZE), 0);
54 int main(int argc, char *argv[])
56 void *fdt_base, *fdt_overlay;
59 test_init(argc, argv);
61 CONFIG("Usage: %s <base dtb> <overlay dtb>", argv[0]);
63 fdt_base = open_dt(argv[1]);
64 fdt_overlay = open_dt(argv[2]);
66 /* Apply the overlay */
67 CHECK(fdt_overlay_apply(fdt_base, fdt_overlay), -FDT_ERR_BADOVERLAY);