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-rw-r--r--qemu/dtc/tests/subnode_iterate.c94
1 files changed, 94 insertions, 0 deletions
diff --git a/qemu/dtc/tests/subnode_iterate.c b/qemu/dtc/tests/subnode_iterate.c
new file mode 100644
index 000000000..b9f379d59
--- /dev/null
+++ b/qemu/dtc/tests/subnode_iterate.c
@@ -0,0 +1,94 @@
+/*
+ * 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 subnodes;
+ const fdt32_t *prop;
+ int offset;
+ int count;
+ int len;
+
+ /* This property indicates the number of subnodes to expect */
+ prop = fdt_getprop(fdt, parent_offset, "subnodes", &len);
+ if (!prop || len != sizeof(fdt32_t)) {
+ FAIL("Missing/invalid subnodes property at '%s'",
+ fdt_get_name(fdt, parent_offset, NULL));
+ }
+ subnodes = cpu_to_fdt32(*prop);
+
+ count = 0;
+ for (offset = fdt_first_subnode(fdt, parent_offset);
+ offset >= 0;
+ offset = fdt_next_subnode(fdt, offset))
+ count++;
+
+ if (count != subnodes) {
+ FAIL("Node '%s': Expected %d subnodes, got %d\n",
+ fdt_get_name(fdt, parent_offset, NULL), subnodes,
+ count);
+ }
+}
+
+static void check_fdt_next_subnode(void *fdt)
+{
+ int offset;
+ int count = 0;
+
+ for (offset = fdt_first_subnode(fdt, 0);
+ offset >= 0;
+ offset = fdt_next_subnode(fdt, offset)) {
+ 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();
+}