diff --git a/tools/ci/check_copyright_ignore.txt b/tools/ci/check_copyright_ignore.txt
index 9321876f3c..c736e851ea 100644
--- a/tools/ci/check_copyright_ignore.txt
+++ b/tools/ci/check_copyright_ignore.txt
@@ -3621,7 +3621,6 @@ tools/kconfig_new/test/gen_kconfig_doc/test_kconfig_out.py
 tools/kconfig_new/test/gen_kconfig_doc/test_target_visibility.py
 tools/ldgen/entity.py
 tools/ldgen/fragments.py
-tools/ldgen/ldgen.py
 tools/ldgen/ldgen_common.py
 tools/ldgen/output_commands.py
 tools/ldgen/samples/template.ld
diff --git a/tools/ldgen/ldgen.py b/tools/ldgen/ldgen.py
index 1bdd5af26d..aba52f2c28 100755
--- a/tools/ldgen/ldgen.py
+++ b/tools/ldgen/ldgen.py
@@ -1,18 +1,7 @@
 #!/usr/bin/env python
 #
-# Copyright 2021 Espressif Systems (Shanghai) CO LTD
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#     http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
+# SPDX-FileCopyrightText: 2021 Espressif Systems (Shanghai) CO LTD
+# SPDX-License-Identifier: Apache-2.0
 #
 
 import argparse
@@ -132,7 +121,7 @@ def main():
             library = library.strip()
             if library:
                 new_env = os.environ.copy()
-                new_env['LC_ALL']='C'
+                new_env['LC_ALL'] = 'C'
                 dump = StringIO(subprocess.check_output([objdump, '-h', library], env=new_env).decode())
                 dump.name = library
                 sections_infos.add_sections_info(dump)