diff --git a/boards/common/cc2538/doc.md b/boards/common/cc2538/doc.md
index 120d3f5c2d..6f9f1b625c 100644
--- a/boards/common/cc2538/doc.md
+++ b/boards/common/cc2538/doc.md
@@ -1,9 +1,6 @@
 <!--
-Copyright (C) 2020 Inria
-
-This file is subject to the terms and conditions of the GNU Lesser
-General Public License v2.1. See the file LICENSE in the top level
-directory for more details.
+SPDX-FileCopyrightText: 2020 Inria
+SPDX-License-Identifier: LGPL-2.1-only
 -->
 
 @defgroup    boards_common_cc2538 cc2538 Configuration Snippets
diff --git a/boards/common/esp32/doc.md b/boards/common/esp32/doc.md
index e9f5c4ed64..e5d422f96d 100644
--- a/boards/common/esp32/doc.md
+++ b/boards/common/esp32/doc.md
@@ -1,9 +1,6 @@
 <!--
-Copyright (C) 2018 Gunar Schorcht
-
-This file is subject to the terms and conditions of the GNU Lesser
-General Public License v2.1. See the file LICENSE in the top level
-directory for more details.
+SPDX-FileCopyrightText: 2018 Gunar Schorcht
+SPDX-License-Identifier: LGPL-2.1-only
 -->
 
 @defgroup    boards_common_esp32  ESP32 Common
diff --git a/boards/common/esp32c3/doc.md b/boards/common/esp32c3/doc.md
index 8adcd3a210..c99acb6b38 100644
--- a/boards/common/esp32c3/doc.md
+++ b/boards/common/esp32c3/doc.md
@@ -1,9 +1,6 @@
 <!--
-Copyright (C) 2018 Gunar Schorcht
-
-This file is subject to the terms and conditions of the GNU Lesser
-General Public License v2.1. See the file LICENSE in the top level
-directory for more details.
+SPDX-FileCopyrightText: 2018 Gunar Schorcht
+SPDX-License-Identifier: LGPL-2.1-only
 -->
 
 @defgroup    boards_common_esp32c3  ESP32-C3 Common
diff --git a/boards/common/esp32c6/doc.md b/boards/common/esp32c6/doc.md
index 83ac16e47f..52e45544f5 100644
--- a/boards/common/esp32c6/doc.md
+++ b/boards/common/esp32c6/doc.md
@@ -1,9 +1,6 @@
 <!--
-Copyright (C) 2025 Gunar Schorcht
-
-This file is subject to the terms and conditions of the GNU Lesser
-General Public License v2.1. See the file LICENSE in the top level
-directory for more details.
+SPDX-FileCopyrightText: 2025 Gunar Schorcht
+SPDX-License-Identifier: LGPL-2.1-only
 -->
 
 @defgroup    boards_common_esp32c6  ESP32-C6 Common
diff --git a/boards/common/esp32h2/doc.md b/boards/common/esp32h2/doc.md
index cd4505c1ea..e53dc177b9 100644
--- a/boards/common/esp32h2/doc.md
+++ b/boards/common/esp32h2/doc.md
@@ -1,9 +1,6 @@
 <!--
-Copyright (C) 2025 Gunar Schorcht
-
-This file is subject to the terms and conditions of the GNU Lesser
-General Public License v2.1. See the file LICENSE in the top level
-directory for more details.
+SPDX-FileCopyrightText: 2025 Gunar Schorcht
+SPDX-License-Identifier: LGPL-2.1-only
 -->
 
 @defgroup    boards_common_esp32h2  ESP32-H2 Common
diff --git a/boards/common/esp32s2/doc.md b/boards/common/esp32s2/doc.md
index 2007814284..726a4f77e7 100644
--- a/boards/common/esp32s2/doc.md
+++ b/boards/common/esp32s2/doc.md
@@ -1,9 +1,6 @@
 <!--
-Copyright (C) 2018 Gunar Schorcht
-
-This file is subject to the terms and conditions of the GNU Lesser
-General Public License v2.1. See the file LICENSE in the top level
-directory for more details.
+SPDX-FileCopyrightText: 2018 Gunar Schorcht
+SPDX-License-Identifier: LGPL-2.1-only
 -->
 
 @defgroup    boards_common_esp32s2  ESP32-S2 Common
diff --git a/boards/common/esp32s3/doc.md b/boards/common/esp32s3/doc.md
index 9ff175301c..bee9db4342 100644
--- a/boards/common/esp32s3/doc.md
+++ b/boards/common/esp32s3/doc.md
@@ -1,9 +1,6 @@
 <!--
-Copyright (C) 2018 Gunar Schorcht
-
-This file is subject to the terms and conditions of the GNU Lesser
-General Public License v2.1. See the file LICENSE in the top level
-directory for more details.
+SPDX-FileCopyrightText: 2018 Gunar Schorcht
+SPDX-License-Identifier: LGPL-2.1-only
 -->
 
 @defgroup    boards_common_esp32s3  ESP32-S3 Common
diff --git a/boards/common/esp32x/doc.md b/boards/common/esp32x/doc.md
index d9d03aa372..a79835537f 100644
--- a/boards/common/esp32x/doc.md
+++ b/boards/common/esp32x/doc.md
@@ -1,9 +1,6 @@
 <!--
-Copyright (C) 2018 Gunar Schorcht
-
-This file is subject to the terms and conditions of the GNU Lesser
-General Public License v2.1. See the file LICENSE in the top level
-directory for more details.
+SPDX-FileCopyrightText: 2018 Gunar Schorcht
+SPDX-License-Identifier: LGPL-2.1-only
 -->
 
 @defgroup    boards_common_esp32x  ESP32x Common
diff --git a/boards/common/frdm/doc.md b/boards/common/frdm/doc.md
index 3bc7629ce1..13091b6c06 100644
--- a/boards/common/frdm/doc.md
+++ b/boards/common/frdm/doc.md
@@ -1,9 +1,6 @@
 <!--
-Copyright (C) 2017 HAW Hamburg
-
-This file is subject to the terms and conditions of the GNU Lesser
-General Public License v2.1. See the file LICENSE in the top level
-directory for more details.
+SPDX-FileCopyrightText: 2017 HAW Hamburg
+SPDX-License-Identifier: LGPL-2.1-only
 -->
 
 @defgroup    boards_common_frdm NXP FRDM Common
diff --git a/boards/common/gd32v/doc.md b/boards/common/gd32v/doc.md
index f7c20c09be..a678dbf85f 100644
--- a/boards/common/gd32v/doc.md
+++ b/boards/common/gd32v/doc.md
@@ -1,9 +1,6 @@
 <!--
-Copyright (C) 2023 Gunar Schorcht
-
-This file is subject to the terms and conditions of the GNU Lesser
-General Public License v2.1. See the file LICENSE in the top level
-directory for more details.
+SPDX-FileCopyrightText: 2023 Gunar Schorcht
+SPDX-License-Identifier: LGPL-2.1-only
 -->
 
 @defgroup    boards_common_gd32v GD32V Common Configuration
diff --git a/boards/common/msp430/doc.md b/boards/common/msp430/doc.md
index d9d1f4a573..730161cf21 100644
--- a/boards/common/msp430/doc.md
+++ b/boards/common/msp430/doc.md
@@ -1,9 +1,6 @@
 <!--
-Copyright (C) 2023 Otto-von-Guericke-Universität Magdeburg
-
-This file is subject to the terms and conditions of the GNU Lesser
-General Public License v2.1. See the file LICENSE in the top level
-directory for more details.
+SPDX-FileCopyrightText: 2023 Otto-von-Guericke-Universität Magdeburg
+SPDX-License-Identifier: LGPL-2.1-only
 -->
 
 @defgroup    boards_common_msp430    Common Configuration Snippets for MSP430 boards
diff --git a/boards/common/silabs/doc.md b/boards/common/silabs/doc.md
index feeea82c14..62fbbc3b8f 100644
--- a/boards/common/silabs/doc.md
+++ b/boards/common/silabs/doc.md
@@ -1,9 +1,6 @@
 <!--
-Copyright (C) 2018 Bas Stottelaar <basstottelaar@gmail.com>
-
-This file is subject to the terms and conditions of the GNU Lesser
-General Public License v2.1. See the file LICENSE in the top level
-directory for more details.
+SPDX-FileCopyrightText: 2018 Bas Stottelaar <basstottelaar@gmail.com>
+SPDX-License-Identifier: LGPL-2.1-only
 -->
 
 @defgroup    boards_common_silabs Silicon Labs Common
diff --git a/boards/common/silabs/drivers/doc.md b/boards/common/silabs/drivers/doc.md
index 42b4fd963c..c3242b5afc 100644
--- a/boards/common/silabs/drivers/doc.md
+++ b/boards/common/silabs/drivers/doc.md
@@ -1,9 +1,6 @@
 <!--
-Copyright (C) 2018 Bas Stottelaar <basstottelaar@gmail.com>
-
-This file is subject to the terms and conditions of the GNU Lesser
-General Public License v2.1. See the file LICENSE in the top level
-directory for more details.
+SPDX-FileCopyrightText: 2018 Bas Stottelaar <basstottelaar@gmail.com>
+SPDX-License-Identifier: LGPL-2.1-only
 -->
 
 @defgroup    boards_common_silabs_drivers Silicon Labs Common Drivers
diff --git a/boards/common/stm32/doc.md b/boards/common/stm32/doc.md
index 223be3a12b..70121582d6 100644
--- a/boards/common/stm32/doc.md
+++ b/boards/common/stm32/doc.md
@@ -1,9 +1,6 @@
 <!--
-Copyright (C) 2018 Freie Universität Berlin
-
-This file is subject to the terms and conditions of the GNU Lesser
-General Public License v2.1. See the file LICENSE in the top level
-directory for more details.
+SPDX-FileCopyrightText: 2018 Freie Universität Berlin
+SPDX-License-Identifier: LGPL-2.1-only
 -->
 
 @defgroup    boards_common_stm32 STM32 Configuration Snippets
diff --git a/boards/esp32-ethernet-kit-v1_0/doc.md b/boards/esp32-ethernet-kit-v1_0/doc.md
index 746908d923..50f89c37b0 100644
--- a/boards/esp32-ethernet-kit-v1_0/doc.md
+++ b/boards/esp32-ethernet-kit-v1_0/doc.md
@@ -1,10 +1,7 @@
 <!--
-Copyright (C) 2018 Gunar Schorcht
-Copyright (C) 2020 Google LLC
-
-This file is subject to the terms and conditions of the GNU Lesser
-General Public License v2.1. See the file LICENSE in the top level
-directory for more details.
+SPDX-FileCopyrightText: 2018 Gunar Schorcht
+SPDX-FileCopyrightText: 2020 Google LLC
+SPDX-License-Identifier: LGPL-2.1-only
 -->
 
 @defgroup   boards_esp32_esp-ethernet-kit-v1_0 ESP32-Ethernet-Kit V1.0 Board
diff --git a/boards/esp32-ethernet-kit-v1_1/doc.md b/boards/esp32-ethernet-kit-v1_1/doc.md
index 8dc7a782d7..c6f6e3c314 100644
--- a/boards/esp32-ethernet-kit-v1_1/doc.md
+++ b/boards/esp32-ethernet-kit-v1_1/doc.md
@@ -1,10 +1,7 @@
 <!--
-Copyright (C) 2018 Gunar Schorcht
-Copyright (C) 2020 Google LLC
-
-This file is subject to the terms and conditions of the GNU Lesser
-General Public License v2.1. See the file LICENSE in the top level
-directory for more details.
+SPDX-FileCopyrightText: 2018 Gunar Schorcht
+SPDX-FileCopyrightText: 2020 Google LLC
+SPDX-License-Identifier: LGPL-2.1-only
 -->
 
 @defgroup   boards_esp32_esp-ethernet-kit-v1_1 ESP32-Ethernet-Kit V1.1 Board
diff --git a/boards/esp32-ethernet-kit-v1_2/doc.md b/boards/esp32-ethernet-kit-v1_2/doc.md
index 68af90c101..8b14007fae 100644
--- a/boards/esp32-ethernet-kit-v1_2/doc.md
+++ b/boards/esp32-ethernet-kit-v1_2/doc.md
@@ -1,10 +1,7 @@
 <!--
-Copyright (C) 2018 Gunar Schorcht
-Copyright (C) 2020 Google LLC
-
-This file is subject to the terms and conditions of the GNU Lesser
-General Public License v2.1. See the file LICENSE in the top level
-directory for more details.
+SPDX-FileCopyrightText: 2018 Gunar Schorcht
+SPDX-FileCopyrightText: 2020 Google LLC
+SPDX-License-Identifier: LGPL-2.1-only
 -->
 
 @defgroup   boards_esp32_esp-ethernet-kit-v1_2 ESP32-Ethernet-Kit V1.2 Board
diff --git a/boards/esp32-heltec-lora32-v2/doc.md b/boards/esp32-heltec-lora32-v2/doc.md
index ade748d533..65c58e047b 100644
--- a/boards/esp32-heltec-lora32-v2/doc.md
+++ b/boards/esp32-heltec-lora32-v2/doc.md
@@ -1,9 +1,6 @@
 <!--
-Copyright (C) 2018 Gunar Schorcht
-
-This file is subject to the terms and conditions of the GNU Lesser
-General Public License v2.1. See the file LICENSE in the top level
-directory for more details.
+SPDX-FileCopyrightText: 2018 Gunar Schorcht
+SPDX-License-Identifier: LGPL-2.1-only
 -->
 
 @defgroup   boards_esp32_heltec-lora32-v2 Heltec WiFi LoRa 32 V2 boards
diff --git a/boards/esp32-mh-et-live-minikit/doc.md b/boards/esp32-mh-et-live-minikit/doc.md
index aa662b7b63..eb19da9c8b 100644
--- a/boards/esp32-mh-et-live-minikit/doc.md
+++ b/boards/esp32-mh-et-live-minikit/doc.md
@@ -1,9 +1,6 @@
 <!--
-Copyright (C) 2018 Gunar Schorcht
-
-This file is subject to the terms and conditions of the GNU Lesser
-General Public License v2.1. See the file LICENSE in the top level
-directory for more details.
+SPDX-FileCopyrightText: 2018 Gunar Schorcht
+SPDX-License-Identifier: LGPL-2.1-only
 -->
 
 @defgroup   boards_esp32_mh-et-live-minikit MH-ET LIVE MiniKit
diff --git a/boards/esp32-olimex-evb/doc.md b/boards/esp32-olimex-evb/doc.md
index f61dad44f3..abfd73dc56 100644
--- a/boards/esp32-olimex-evb/doc.md
+++ b/boards/esp32-olimex-evb/doc.md
@@ -1,9 +1,6 @@
 <!--
-Copyright (C) 2018 Gunar Schorcht
-
-This file is subject to the terms and conditions of the GNU Lesser
-General Public License v2.1. See the file LICENSE in the top level
-directory for more details.
+SPDX-FileCopyrightText: 2018 Gunar Schorcht
+SPDX-License-Identifier: LGPL-2.1-only
 -->
 
 @defgroup   boards_esp32_olimex-esp32-evb Olimex ESP32-EVB
diff --git a/boards/esp32-ttgo-t-beam/doc.md b/boards/esp32-ttgo-t-beam/doc.md
index 844fd70283..e71504a298 100644
--- a/boards/esp32-ttgo-t-beam/doc.md
+++ b/boards/esp32-ttgo-t-beam/doc.md
@@ -1,9 +1,6 @@
 <!--
-Copyright (C) 2019 Yegor Yefremov
-
-This file is subject to the terms and conditions of the GNU Lesser
-General Public License v2.1. See the file LICENSE in the top level
-directory for more details.
+SPDX-FileCopyrightText: 2019 Yegor Yefremov
+SPDX-License-Identifier: LGPL-2.1-only
 -->
 
 @defgroup   boards_esp32_ttgo-t-beam TTGO T-Beam
diff --git a/boards/esp32-wemos-lolin-d32-pro/doc.md b/boards/esp32-wemos-lolin-d32-pro/doc.md
index f661fbc678..807f238074 100644
--- a/boards/esp32-wemos-lolin-d32-pro/doc.md
+++ b/boards/esp32-wemos-lolin-d32-pro/doc.md
@@ -1,9 +1,6 @@
 <!--
-Copyright (C) 2018 Gunar Schorcht
-
-This file is subject to the terms and conditions of the GNU Lesser
-General Public License v2.1. See the file LICENSE in the top level
-directory for more details.
+SPDX-FileCopyrightText: 2018 Gunar Schorcht
+SPDX-License-Identifier: LGPL-2.1-only
 -->
 
 @defgroup   boards_esp32_wemos-lolin-d32-pro Wemos LOLIN D32 Pro
diff --git a/boards/esp32-wroom-32/doc.md b/boards/esp32-wroom-32/doc.md
index f793fecf31..c632548a38 100644
--- a/boards/esp32-wroom-32/doc.md
+++ b/boards/esp32-wroom-32/doc.md
@@ -1,9 +1,6 @@
 <!--
-Copyright (C) 2018 Gunar Schorcht
-
-This file is subject to the terms and conditions of the GNU Lesser
-General Public License v2.1. See the file LICENSE in the top level
-directory for more details.
+SPDX-FileCopyrightText: 2018 Gunar Schorcht
+SPDX-License-Identifier: LGPL-2.1-only
 -->
 
 @defgroup   boards_esp32_wroom-32 Generic ESP32-WROOM-32 boards
diff --git a/boards/esp32-wrover-kit/doc.md b/boards/esp32-wrover-kit/doc.md
index d1f1adafe0..fc192e6d23 100644
--- a/boards/esp32-wrover-kit/doc.md
+++ b/boards/esp32-wrover-kit/doc.md
@@ -1,9 +1,6 @@
 <!--
-Copyright (C) 2018 Gunar Schorcht
-
-This file is subject to the terms and conditions of the GNU Lesser
-General Public License v2.1. See the file LICENSE in the top level
-directory for more details.
+SPDX-FileCopyrightText: 2018 Gunar Schorcht
+SPDX-License-Identifier: LGPL-2.1-only
 -->
 
 @defgroup   boards_esp32_esp-wrover-kit ESP-WROVER-KIT V3
diff --git a/boards/esp32c3-devkit/doc.md b/boards/esp32c3-devkit/doc.md
index 429a4d8ccc..c158f1344e 100644
--- a/boards/esp32c3-devkit/doc.md
+++ b/boards/esp32c3-devkit/doc.md
@@ -1,9 +1,6 @@
 <!--
-Copyright (C) 2022 Gunar Schorcht
-
-This file is subject to the terms and conditions of the GNU Lesser
-General Public License v2.1. See the file LICENSE in the top level
-directory for more details.
+SPDX-FileCopyrightText: 2022 Gunar Schorcht
+SPDX-License-Identifier: LGPL-2.1-only
 -->
 
 @defgroup   boards_esp32c3_devkit ESP32-C3-DevKit Board
diff --git a/boards/esp32c3-wemos-mini/doc.md b/boards/esp32c3-wemos-mini/doc.md
index 9a079ca4a2..b23256a5f9 100644
--- a/boards/esp32c3-wemos-mini/doc.md
+++ b/boards/esp32c3-wemos-mini/doc.md
@@ -1,9 +1,6 @@
 <!--
-Copyright (C) 2023 Gunar Schorcht
-
-This file is subject to the terms and conditions of the GNU Lesser
-General Public License v2.1. See the file LICENSE in the top level
-directory for more details.
+SPDX-FileCopyrightText: 2023 Gunar Schorcht
+SPDX-License-Identifier: LGPL-2.1-only
 -->
 
 @defgroup   boards_esp32c3_wemos_mini Wemos ESP32-C3 mini
diff --git a/boards/esp32c6-devkit/doc.md b/boards/esp32c6-devkit/doc.md
index bcc212a102..94043a983e 100644
--- a/boards/esp32c6-devkit/doc.md
+++ b/boards/esp32c6-devkit/doc.md
@@ -1,9 +1,6 @@
 <!--
-Copyright (C) 2025 Gunar Schorcht
-
-This file is subject to the terms and conditions of the GNU Lesser
-General Public License v2.1. See the file LICENSE in the top level
-directory for more details.
+SPDX-FileCopyrightText: 2025 Gunar Schorcht
+SPDX-License-Identifier: LGPL-2.1-only
 -->
 
 @defgroup    boards_esp32c6_devkit ESP32-C6-DevKit Board
diff --git a/boards/esp32h2-devkit/doc.md b/boards/esp32h2-devkit/doc.md
index 4d8d85d7c7..0797d86970 100644
--- a/boards/esp32h2-devkit/doc.md
+++ b/boards/esp32h2-devkit/doc.md
@@ -1,9 +1,6 @@
 <!--
-Copyright (C) 2025 Gunar Schorcht
-
-This file is subject to the terms and conditions of the GNU Lesser
-General Public License v2.1. See the file LICENSE in the top level
-directory for more details.
+SPDX-FileCopyrightText: 2025 Gunar Schorcht
+SPDX-License-Identifier: LGPL-2.1-only
 -->
 
 @defgroup    boards_esp32h2_devkit ESP32-H2-DevKitM-1 Board
diff --git a/boards/esp32s2-devkit/doc.md b/boards/esp32s2-devkit/doc.md
index e68e783d64..8698f78337 100644
--- a/boards/esp32s2-devkit/doc.md
+++ b/boards/esp32s2-devkit/doc.md
@@ -1,9 +1,6 @@
 <!--
-Copyright (C) 2022 Gunar Schorcht
-
-This file is subject to the terms and conditions of the GNU Lesser
-General Public License v2.1. See the file LICENSE in the top level
-directory for more details.
+SPDX-FileCopyrightText: 2022 Gunar Schorcht
+SPDX-License-Identifier: LGPL-2.1-only
 -->
 
 @defgroup   boards_esp32s2_devkit ESP32-S2-DevKit Board
diff --git a/boards/esp32s2-lilygo-ttgo-t8/doc.md b/boards/esp32s2-lilygo-ttgo-t8/doc.md
index 0172ed6e7b..837ec5cd56 100644
--- a/boards/esp32s2-lilygo-ttgo-t8/doc.md
+++ b/boards/esp32s2-lilygo-ttgo-t8/doc.md
@@ -1,9 +1,6 @@
 <!--
-Copyright (C) 2022 Gunar Schorcht
-
-This file is subject to the terms and conditions of the GNU Lesser
-General Public License v2.1. See the file LICENSE in the top level
-directory for more details.
+SPDX-FileCopyrightText: 2022 Gunar Schorcht
+SPDX-License-Identifier: LGPL-2.1-only
 -->
 
 @defgroup   boards_esp32s2_lilygo_ttgo_t8 LILYGO TTGO T8 ESP32-S2 Board
diff --git a/boards/esp32s2-wemos-mini/doc.md b/boards/esp32s2-wemos-mini/doc.md
index 0d1f192a0c..86ae33ab47 100644
--- a/boards/esp32s2-wemos-mini/doc.md
+++ b/boards/esp32s2-wemos-mini/doc.md
@@ -1,9 +1,6 @@
 <!--
-Copyright (C) 2022 Benjamin Valentin
-
-This file is subject to the terms and conditions of the GNU Lesser
-General Public License v2.1. See the file LICENSE in the top level
-directory for more details.
+SPDX-FileCopyrightText: 2022 Benjamin Valentin
+SPDX-License-Identifier: LGPL-2.1-only
 -->
 
 @defgroup   boards_esp32s2-wemos-mini Wemos S2 mini Board
diff --git a/boards/esp32s3-box/doc.md b/boards/esp32s3-box/doc.md
index 31dad91ee0..24ead5cbe4 100644
--- a/boards/esp32s3-box/doc.md
+++ b/boards/esp32s3-box/doc.md
@@ -1,9 +1,6 @@
 <!--
-Copyright (C) 2023 Gunar Schorcht
-
-This file is subject to the terms and conditions of the GNU Lesser
-General Public License v2.1. See the file LICENSE in the top level
-directory for more details.
+SPDX-FileCopyrightText: 2023 Gunar Schorcht
+SPDX-License-Identifier: LGPL-2.1-only
 -->
 
 @defgroup   boards_esp32s3_box ESP32-S3-Box
diff --git a/boards/esp32s3-devkit/doc.md b/boards/esp32s3-devkit/doc.md
index 6b97e204f2..d6b5a2d6d8 100644
--- a/boards/esp32s3-devkit/doc.md
+++ b/boards/esp32s3-devkit/doc.md
@@ -1,9 +1,6 @@
 <!--
-Copyright (C) 2022 Gunar Schorcht
-
-This file is subject to the terms and conditions of the GNU Lesser
-General Public License v2.1. See the file LICENSE in the top level
-directory for more details.
+SPDX-FileCopyrightText: 2022 Gunar Schorcht
+SPDX-License-Identifier: LGPL-2.1-only
 -->
 
 @defgroup   boards_esp32s3_devkit ESP32-S3-DevKit Board
diff --git a/boards/esp32s3-pros3/doc.md b/boards/esp32s3-pros3/doc.md
index dc5f2fe15c..fd39a4ec05 100644
--- a/boards/esp32s3-pros3/doc.md
+++ b/boards/esp32s3-pros3/doc.md
@@ -1,9 +1,6 @@
 <!--
-Copyright (C) 2023 Gunar Schorcht
-
-This file is subject to the terms and conditions of the GNU Lesser
-General Public License v2.1. See the file LICENSE in the top level
-directory for more details.
+SPDX-FileCopyrightText: 2023 Gunar Schorcht
+SPDX-License-Identifier: LGPL-2.1-only
 -->
 
 @defgroup   boards_esp32s3_pros3 ESP32 ProS3 Board
diff --git a/boards/esp32s3-usb-otg/doc.md b/boards/esp32s3-usb-otg/doc.md
index 9bf3d9a9ee..fb30875867 100644
--- a/boards/esp32s3-usb-otg/doc.md
+++ b/boards/esp32s3-usb-otg/doc.md
@@ -1,9 +1,6 @@
 <!--
-Copyright (C) 2023 Gunar Schorcht
-
-This file is subject to the terms and conditions of the GNU Lesser
-General Public License v2.1. See the file LICENSE in the top level
-directory for more details.
+SPDX-FileCopyrightText: 2023 Gunar Schorcht
+SPDX-License-Identifier: LGPL-2.1-only
 -->
 
 @defgroup   boards_esp32s3_usb_otg ESP32-S3-USB-OTG Board
diff --git a/boards/esp32s3-wt32-sc01-plus/doc.md b/boards/esp32s3-wt32-sc01-plus/doc.md
index c3d371adcc..79c6583587 100644
--- a/boards/esp32s3-wt32-sc01-plus/doc.md
+++ b/boards/esp32s3-wt32-sc01-plus/doc.md
@@ -1,9 +1,6 @@
 <!--
-Copyright (C) 2023 Gunar Schorcht
-
-This file is subject to the terms and conditions of the GNU Lesser
-General Public License v2.1. See the file LICENSE in the top level
-directory for more details.
+SPDX-FileCopyrightText: 2023 Gunar Schorcht
+SPDX-License-Identifier: LGPL-2.1-only
 -->
 
 @defgroup   boards_esp32s3_wt32_sc01_plus ESP32-S3 WT32-SC01 Plus
diff --git a/boards/seeedstudio-xiao-esp32c3/doc.md b/boards/seeedstudio-xiao-esp32c3/doc.md
index da4da039e2..2ce6a0299c 100644
--- a/boards/seeedstudio-xiao-esp32c3/doc.md
+++ b/boards/seeedstudio-xiao-esp32c3/doc.md
@@ -1,9 +1,6 @@
 <!--
-Copyright (C) 2025 David Picard
-
-This file is subject to the terms and conditions of the GNU Lesser
-General Public License v2.1. See the file LICENSE in the top level
-directory for more details.
+SPDX-FileCopyrightText: 2025 David Picard
+SPDX-License-Identifier: LGPL-2.1-only
 -->
 
 @defgroup    boards_seeedstudio-xiao-esp32c3 Seeed Studio Xiao ESP32C3