diff --git a/components/efuse/esp32/esp_efuse_fields.c b/components/efuse/esp32/esp_efuse_fields.c
index 0745d14969d..cb5917e9c27 100644
--- a/components/efuse/esp32/esp_efuse_fields.c
+++ b/components/efuse/esp32/esp_efuse_fields.c
@@ -1,16 +1,8 @@
-// Copyright 2017-2018 Espressif Systems (Shanghai) PTE 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: 2017-2021 Espressif Systems (Shanghai) CO LTD
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
 
 #include "esp_efuse.h"
 #include "esp_efuse_utility.h"
diff --git a/components/efuse/esp32/esp_efuse_utility.c b/components/efuse/esp32/esp_efuse_utility.c
index 7d95f09cc07..bfda6da7248 100644
--- a/components/efuse/esp32/esp_efuse_utility.c
+++ b/components/efuse/esp32/esp_efuse_utility.c
@@ -1,16 +1,8 @@
-// Copyright 2017-2018 Espressif Systems (Shanghai) PTE 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: 2017-2021 Espressif Systems (Shanghai) CO LTD
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
 
 #include "esp_efuse_utility.h"
 #include "soc/efuse_periph.h"
diff --git a/components/efuse/esp32/include/esp_efuse.h b/components/efuse/esp32/include/esp_efuse.h
index 5aa61589804..4c06439e090 100644
--- a/components/efuse/esp32/include/esp_efuse.h
+++ b/components/efuse/esp32/include/esp_efuse.h
@@ -1,16 +1,8 @@
-// Copyright 2019 Espressif Systems (Shanghai) PTE 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: 2019-2021 Espressif Systems (Shanghai) CO LTD
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
 
 #pragma once
 
diff --git a/components/efuse/esp32/private_include/esp_efuse_utility.h b/components/efuse/esp32/private_include/esp_efuse_utility.h
index 0208c82d7d0..7916223843a 100644
--- a/components/efuse/esp32/private_include/esp_efuse_utility.h
+++ b/components/efuse/esp32/private_include/esp_efuse_utility.h
@@ -1,16 +1,8 @@
-// Copyright 2019 Espressif Systems (Shanghai) PTE 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: 2019-2021 Espressif Systems (Shanghai) CO LTD
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
 
 #pragma once
 
diff --git a/components/efuse/esp32c3/esp_efuse_fields.c b/components/efuse/esp32c3/esp_efuse_fields.c
index 6ee77802ed9..42938c226b4 100644
--- a/components/efuse/esp32c3/esp_efuse_fields.c
+++ b/components/efuse/esp32c3/esp_efuse_fields.c
@@ -1,16 +1,8 @@
-// Copyright 2017-2020 Espressif Systems (Shanghai) PTE 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: 2017-2021 Espressif Systems (Shanghai) CO LTD
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
 
 #include "esp_efuse.h"
 #include "esp_efuse_utility.h"
diff --git a/components/efuse/esp32c3/esp_efuse_rtc_calib.c b/components/efuse/esp32c3/esp_efuse_rtc_calib.c
index afda42ca268..52e4167363b 100644
--- a/components/efuse/esp32c3/esp_efuse_rtc_calib.c
+++ b/components/efuse/esp32c3/esp_efuse_rtc_calib.c
@@ -1,16 +1,8 @@
-// Copyright 2020 Espressif Systems (Shanghai) PTE 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: 2020-2021 Espressif Systems (Shanghai) CO LTD
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
 
 #include <esp_bit_defs.h>
 #include "esp_efuse.h"
diff --git a/components/efuse/esp32c3/esp_efuse_utility.c b/components/efuse/esp32c3/esp_efuse_utility.c
index 3aba89ddf00..33a6e3a605d 100644
--- a/components/efuse/esp32c3/esp_efuse_utility.c
+++ b/components/efuse/esp32c3/esp_efuse_utility.c
@@ -1,16 +1,8 @@
-// Copyright 2017-2020 Espressif Systems (Shanghai) PTE 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: 2017-2021 Espressif Systems (Shanghai) CO LTD
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
 
 #include <sys/param.h>
 #include "sdkconfig.h"
diff --git a/components/efuse/esp32c3/include/esp_efuse.h b/components/efuse/esp32c3/include/esp_efuse.h
index 9ae3ab08df9..9a07a7e0512 100644
--- a/components/efuse/esp32c3/include/esp_efuse.h
+++ b/components/efuse/esp32c3/include/esp_efuse.h
@@ -1,16 +1,8 @@
-// Copyright 2020 Espressif Systems (Shanghai) PTE 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: 2020-2021 Espressif Systems (Shanghai) CO LTD
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
 
 #pragma once
 
diff --git a/components/efuse/esp32c3/include/esp_efuse_rtc_calib.h b/components/efuse/esp32c3/include/esp_efuse_rtc_calib.h
index 5dc007f8c5f..0e059c4f3f1 100644
--- a/components/efuse/esp32c3/include/esp_efuse_rtc_calib.h
+++ b/components/efuse/esp32c3/include/esp_efuse_rtc_calib.h
@@ -1,16 +1,8 @@
-// Copyright 2020 Espressif Systems (Shanghai) PTE 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: 2020-2021 Espressif Systems (Shanghai) CO LTD
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
 
 #include <esp_types.h>
 #include <esp_err.h>
diff --git a/components/efuse/esp32c3/private_include/esp_efuse_utility.h b/components/efuse/esp32c3/private_include/esp_efuse_utility.h
index 2a2abbca9d1..37573eea8f3 100644
--- a/components/efuse/esp32c3/private_include/esp_efuse_utility.h
+++ b/components/efuse/esp32c3/private_include/esp_efuse_utility.h
@@ -1,16 +1,8 @@
-// Copyright 2020 Espressif Systems (Shanghai) PTE 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: 2020-2021 Espressif Systems (Shanghai) CO LTD
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
 
 #pragma once
 
diff --git a/components/efuse/esp32s2/esp_efuse_fields.c b/components/efuse/esp32s2/esp_efuse_fields.c
index 95aa78b717e..4c81734845a 100644
--- a/components/efuse/esp32s2/esp_efuse_fields.c
+++ b/components/efuse/esp32s2/esp_efuse_fields.c
@@ -1,16 +1,8 @@
-// Copyright 2017-2018 Espressif Systems (Shanghai) PTE 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: 2017-2021 Espressif Systems (Shanghai) CO LTD
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
 
 #include "esp_efuse.h"
 #include "esp_efuse_utility.h"
diff --git a/components/efuse/esp32s2/esp_efuse_rtc_table.c b/components/efuse/esp32s2/esp_efuse_rtc_table.c
index 4b99b41875d..d8fc8fb289e 100644
--- a/components/efuse/esp32s2/esp_efuse_rtc_table.c
+++ b/components/efuse/esp32s2/esp_efuse_rtc_table.c
@@ -1,16 +1,8 @@
-// Copyright 2017-2018 Espressif Systems (Shanghai) PTE 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: 2017-2021 Espressif Systems (Shanghai) CO LTD
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
 
 #include <stdbool.h>
 #include "esp_efuse_rtc_table.h"
diff --git a/components/efuse/esp32s2/esp_efuse_utility.c b/components/efuse/esp32s2/esp_efuse_utility.c
index 5dd43b64b1e..5cfbd933971 100644
--- a/components/efuse/esp32s2/esp_efuse_utility.c
+++ b/components/efuse/esp32s2/esp_efuse_utility.c
@@ -1,16 +1,8 @@
-// Copyright 2017-2018 Espressif Systems (Shanghai) PTE 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: 2017-2021 Espressif Systems (Shanghai) CO LTD
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
 
 #include "esp_efuse_utility.h"
 #include "soc/efuse_periph.h"
diff --git a/components/efuse/esp32s2/include/esp_efuse.h b/components/efuse/esp32s2/include/esp_efuse.h
index 9e5096b9b82..6922c8cc885 100644
--- a/components/efuse/esp32s2/include/esp_efuse.h
+++ b/components/efuse/esp32s2/include/esp_efuse.h
@@ -1,16 +1,8 @@
-// Copyright 2019 Espressif Systems (Shanghai) PTE 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: 2019-2021 Espressif Systems (Shanghai) CO LTD
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
 
 #pragma once
 
diff --git a/components/efuse/esp32s2/include/esp_efuse_rtc_table.h b/components/efuse/esp32s2/include/esp_efuse_rtc_table.h
index b9157ef0790..3cc54e20353 100644
--- a/components/efuse/esp32s2/include/esp_efuse_rtc_table.h
+++ b/components/efuse/esp32s2/include/esp_efuse_rtc_table.h
@@ -1,16 +1,8 @@
-// Copyright 2017-2018 Espressif Systems (Shanghai) PTE 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: 2017-2021 Espressif Systems (Shanghai) CO LTD
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
 
 #pragma once
 
diff --git a/components/efuse/esp32s2/private_include/esp_efuse_utility.h b/components/efuse/esp32s2/private_include/esp_efuse_utility.h
index 3975baf6a1e..9ee0f704f4b 100644
--- a/components/efuse/esp32s2/private_include/esp_efuse_utility.h
+++ b/components/efuse/esp32s2/private_include/esp_efuse_utility.h
@@ -1,16 +1,8 @@
-// Copyright 2019 Espressif Systems (Shanghai) PTE 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: 2019-2021 Espressif Systems (Shanghai) CO LTD
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
 
 #pragma once
 
diff --git a/components/efuse/esp32s3/esp_efuse_fields.c b/components/efuse/esp32s3/esp_efuse_fields.c
index 35756062a2d..4c81734845a 100644
--- a/components/efuse/esp32s3/esp_efuse_fields.c
+++ b/components/efuse/esp32s3/esp_efuse_fields.c
@@ -1,16 +1,8 @@
-// Copyright 2017-2020 Espressif Systems (Shanghai) PTE 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: 2017-2021 Espressif Systems (Shanghai) CO LTD
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
 
 #include "esp_efuse.h"
 #include "esp_efuse_utility.h"
diff --git a/components/efuse/esp32s3/esp_efuse_utility.c b/components/efuse/esp32s3/esp_efuse_utility.c
index 697ad87f303..da0cccc4912 100644
--- a/components/efuse/esp32s3/esp_efuse_utility.c
+++ b/components/efuse/esp32s3/esp_efuse_utility.c
@@ -1,16 +1,8 @@
-// Copyright 2017-2020 Espressif Systems (Shanghai) PTE 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: 2017-2021 Espressif Systems (Shanghai) CO LTD
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
 
 #include "esp_efuse_utility.h"
 #include "soc/efuse_periph.h"
diff --git a/components/efuse/esp32s3/include/esp_efuse.h b/components/efuse/esp32s3/include/esp_efuse.h
index 4c2beedfd5c..56002e8b29f 100644
--- a/components/efuse/esp32s3/include/esp_efuse.h
+++ b/components/efuse/esp32s3/include/esp_efuse.h
@@ -1,16 +1,8 @@
-// Copyright 2020 Espressif Systems (Shanghai) PTE 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: 2020-2021 Espressif Systems (Shanghai) CO LTD
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
 
 #pragma once
 
diff --git a/components/efuse/esp32s3/private_include/esp_efuse_utility.h b/components/efuse/esp32s3/private_include/esp_efuse_utility.h
index 2a2abbca9d1..37573eea8f3 100644
--- a/components/efuse/esp32s3/private_include/esp_efuse_utility.h
+++ b/components/efuse/esp32s3/private_include/esp_efuse_utility.h
@@ -1,16 +1,8 @@
-// Copyright 2020 Espressif Systems (Shanghai) PTE 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: 2020-2021 Espressif Systems (Shanghai) CO LTD
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
 
 #pragma once
 
diff --git a/components/efuse/include/esp_efuse.h b/components/efuse/include/esp_efuse.h
index 019657938ac..e84975e587d 100644
--- a/components/efuse/include/esp_efuse.h
+++ b/components/efuse/include/esp_efuse.h
@@ -1,16 +1,8 @@
-// Copyright 2017-2018 Espressif Systems (Shanghai) PTE 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: 2017-2021 Espressif Systems (Shanghai) CO LTD
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
 
 #pragma once
 
diff --git a/components/efuse/private_include/esp_efuse_utility.h b/components/efuse/private_include/esp_efuse_utility.h
index 979d954a7f7..48679173c74 100644
--- a/components/efuse/private_include/esp_efuse_utility.h
+++ b/components/efuse/private_include/esp_efuse_utility.h
@@ -1,16 +1,8 @@
-// Copyright 2017-2018 Espressif Systems (Shanghai) PTE 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: 2017-2021 Espressif Systems (Shanghai) CO LTD
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
 
 #pragma once
 
diff --git a/components/efuse/src/esp_efuse_api.c b/components/efuse/src/esp_efuse_api.c
index f97b03d183e..af1d75faa72 100644
--- a/components/efuse/src/esp_efuse_api.c
+++ b/components/efuse/src/esp_efuse_api.c
@@ -1,16 +1,8 @@
-// Copyright 2017-2018 Espressif Systems (Shanghai) PTE 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: 2017-2021 Espressif Systems (Shanghai) CO LTD
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
 
 #include "esp_efuse.h"
 #include "esp_efuse_utility.h"
diff --git a/components/efuse/src/esp_efuse_api_key_esp32.c b/components/efuse/src/esp_efuse_api_key_esp32.c
index c70321767ef..150b8f80f06 100644
--- a/components/efuse/src/esp_efuse_api_key_esp32.c
+++ b/components/efuse/src/esp_efuse_api_key_esp32.c
@@ -1,16 +1,8 @@
-// Copyright 2019 Espressif Systems (Shanghai) PTE 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: 2019-2021 Espressif Systems (Shanghai) CO LTD
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
 
 #include "esp_efuse.h"
 #include "esp_efuse_utility.h"
diff --git a/components/efuse/src/esp_efuse_api_key_esp32xx.c b/components/efuse/src/esp_efuse_api_key_esp32xx.c
index 33a10ebac6b..87e431da392 100644
--- a/components/efuse/src/esp_efuse_api_key_esp32xx.c
+++ b/components/efuse/src/esp_efuse_api_key_esp32xx.c
@@ -1,16 +1,8 @@
-// Copyright 2017-2018 Espressif Systems (Shanghai) PTE 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: 2017-2021 Espressif Systems (Shanghai) CO LTD
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
 
 #include "esp_efuse.h"
 #include "esp_efuse_utility.h"
diff --git a/components/efuse/src/esp_efuse_fields.c b/components/efuse/src/esp_efuse_fields.c
index ef57c6a084a..c07c432a262 100644
--- a/components/efuse/src/esp_efuse_fields.c
+++ b/components/efuse/src/esp_efuse_fields.c
@@ -1,16 +1,8 @@
-// Copyright 2017-2018 Espressif Systems (Shanghai) PTE 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: 2017-2021 Espressif Systems (Shanghai) CO LTD
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
 
 #include <stdlib.h>
 #include "sdkconfig.h"
diff --git a/components/efuse/src/esp_efuse_utility.c b/components/efuse/src/esp_efuse_utility.c
index 23d5024836c..a59cb70d3cc 100644
--- a/components/efuse/src/esp_efuse_utility.c
+++ b/components/efuse/src/esp_efuse_utility.c
@@ -1,16 +1,8 @@
-// Copyright 2017-2018 Espressif Systems (Shanghai) PTE 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: 2017-2021 Espressif Systems (Shanghai) CO LTD
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
 
 #include "esp_efuse_utility.h"
 
diff --git a/components/efuse/test/esp_efuse_test_table.c b/components/efuse/test/esp_efuse_test_table.c
index 0ceae93bc8f..794ff6dc3b2 100644
--- a/components/efuse/test/esp_efuse_test_table.c
+++ b/components/efuse/test/esp_efuse_test_table.c
@@ -1,16 +1,8 @@
-// Copyright 2017-2018 Espressif Systems (Shanghai) PTE 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: 2017-2021 Espressif Systems (Shanghai) CO LTD
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
 
 #include "esp_efuse.h"
 #include "esp_efuse_test_table.h"
diff --git a/components/efuse/test/include/esp_efuse_test_table.h b/components/efuse/test/include/esp_efuse_test_table.h
index a7d39948d87..c297e610d35 100644
--- a/components/efuse/test/include/esp_efuse_test_table.h
+++ b/components/efuse/test/include/esp_efuse_test_table.h
@@ -1,16 +1,8 @@
-// Copyright 2017-2018 Espressif Systems (Shanghai) PTE 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: 2017-2021 Espressif Systems (Shanghai) CO LTD
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
 
 #ifdef __cplusplus
 extern "C" {
diff --git a/components/efuse/test/test_efuse.c b/components/efuse/test/test_efuse.c
index a78111818d2..5586bd01633 100644
--- a/components/efuse/test/test_efuse.c
+++ b/components/efuse/test/test_efuse.c
@@ -1,3 +1,8 @@
+/*
+ * SPDX-FileCopyrightText: 2021 Espressif Systems (Shanghai) CO LTD
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
 #include <stdio.h>
 #include <ctype.h>
 #include <errno.h>
diff --git a/components/efuse/test/test_efuse_coding_scheme.c b/components/efuse/test/test_efuse_coding_scheme.c
index f85cbe511d2..753fe624d15 100644
--- a/components/efuse/test/test_efuse_coding_scheme.c
+++ b/components/efuse/test/test_efuse_coding_scheme.c
@@ -1,3 +1,8 @@
+/*
+ * SPDX-FileCopyrightText: 2021 Espressif Systems (Shanghai) CO LTD
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
 #include <stdint.h>
 #include <strings.h>
 #include "esp_efuse.h"
diff --git a/components/efuse/test/test_efuse_keys.c b/components/efuse/test/test_efuse_keys.c
index b7f1915211e..b0fe660e58b 100644
--- a/components/efuse/test/test_efuse_keys.c
+++ b/components/efuse/test/test_efuse_keys.c
@@ -1,3 +1,8 @@
+/*
+ * SPDX-FileCopyrightText: 2021 Espressif Systems (Shanghai) CO LTD
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
 #include <stdio.h>
 #include <ctype.h>
 #include <errno.h>
diff --git a/components/efuse/test_efuse_host/efuse_tests.py b/components/efuse/test_efuse_host/efuse_tests.py
index d98f68e926f..264f015423c 100755
--- a/components/efuse/test_efuse_host/efuse_tests.py
+++ b/components/efuse/test_efuse_host/efuse_tests.py
@@ -1,4 +1,6 @@
 #!/usr/bin/env python
+# SPDX-FileCopyrightText: 2021 Espressif Systems (Shanghai) CO LTD
+# SPDX-License-Identifier: Apache-2.0
 from __future__ import division, print_function
 
 import sys