1 files changed, 50 insertions, 0 deletions
diff --git a/dtc/tests/node_offset_by_phandle.c b/dtc/tests/node_offset_by_phandle.c
new file mode 100644
index 000000000..60af78a79
--- /dev/null
+++ b/dtc/tests/node_offset_by_phandle.c
@@ -0,0 +1,50 @@
+// SPDX-License-Identifier: LGPL-2.1-or-later
+/*
+ * libfdt - Flat Device Tree manipulation
+ *	Testcase for fdt_node_offset_by_phandle()
+ * Copyright (C) 2006 David Gibson, IBM Corporation.
+ */
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <stdint.h>
+#include <stdarg.h>
+
+#include <libfdt.h>
+
+#include "tests.h"
+#include "testdata.h"
+
+static void check_search(void *fdt, uint32_t phandle, int target)
+{
+	int offset;
+
+	offset = fdt_node_offset_by_phandle(fdt, phandle);
+
+	if (offset != target)
+		FAIL("fdt_node_offset_by_phandle(0x%x) returns %d "
+		     "instead of %d", phandle, offset, target);
+}
+
+int main(int argc, char *argv[])
+{
+	void *fdt;
+	int subnode2_offset, subsubnode2_offset;
+
+	test_init(argc, argv);
+	fdt = load_blob_arg(argc, argv);
+
+	subnode2_offset = fdt_path_offset(fdt, "/subnode@2");
+	subsubnode2_offset = fdt_path_offset(fdt, "/subnode@2/subsubnode@0");
+
+	if ((subnode2_offset < 0) || (subsubnode2_offset < 0))
+		FAIL("Can't find required nodes");
+
+	check_search(fdt, PHANDLE_1, subnode2_offset);
+	check_search(fdt, PHANDLE_2, subsubnode2_offset);
+	check_search(fdt, ~PHANDLE_1, -FDT_ERR_NOTFOUND);
+	check_search(fdt, 0, -FDT_ERR_BADPHANDLE);
+	check_search(fdt, -1, -FDT_ERR_BADPHANDLE);
+
+	PASS();
+}