diff --git a/boards/arm64/rk3399/nanopi_m4/include/board.h b/boards/arm64/rk3399/nanopi_m4/include/board.h
index 3e843ce66f..d3e8c9a202 100644
--- a/boards/arm64/rk3399/nanopi_m4/include/board.h
+++ b/boards/arm64/rk3399/nanopi_m4/include/board.h
@@ -1,6 +1,8 @@
 /****************************************************************************
  * boards/arm64/rk3399/nanopi_m4/include/board.h
  *
+ * SPDX-License-Identifier: Apache-2.0
+ *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements.  See the NOTICE file distributed with
  * this work for additional information regarding copyright ownership.  The
diff --git a/boards/arm64/rk3399/nanopi_m4/scripts/Make.defs b/boards/arm64/rk3399/nanopi_m4/scripts/Make.defs
index b0e3015148..7df3d5d768 100644
--- a/boards/arm64/rk3399/nanopi_m4/scripts/Make.defs
+++ b/boards/arm64/rk3399/nanopi_m4/scripts/Make.defs
@@ -1,6 +1,8 @@
 ############################################################################
 # boards/arm64/rk3399/nanopi_m4/scripts/Make.defs
 #
+# SPDX-License-Identifier: Apache-2.0
+#
 # Licensed to the Apache Software Foundation (ASF) under one or more
 # contributor license agreements.  See the NOTICE file distributed with
 # this work for additional information regarding copyright ownership.  The
diff --git a/boards/arm64/rk3399/nanopi_m4/scripts/dramboot.ld b/boards/arm64/rk3399/nanopi_m4/scripts/dramboot.ld
index 671e27653c..29ba6ca362 100644
--- a/boards/arm64/rk3399/nanopi_m4/scripts/dramboot.ld
+++ b/boards/arm64/rk3399/nanopi_m4/scripts/dramboot.ld
@@ -1,6 +1,8 @@
 /****************************************************************************
  * boards/arm64/rk3399/nanopi_m4/scripts/dramboot.ld
  *
+ * SPDX-License-Identifier: Apache-2.0
+ *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements.  See the NOTICE file distributed with
  * this work for additional information regarding copyright ownership.  The
diff --git a/boards/arm64/rk3399/nanopi_m4/src/Makefile b/boards/arm64/rk3399/nanopi_m4/src/Makefile
index e64f06871d..44c09add7e 100644
--- a/boards/arm64/rk3399/nanopi_m4/src/Makefile
+++ b/boards/arm64/rk3399/nanopi_m4/src/Makefile
@@ -1,6 +1,8 @@
 ############################################################################
 # boards/arm64/rk3399/nanopi_m4/src/Makefile
 #
+# SPDX-License-Identifier: Apache-2.0
+#
 # Licensed to the Apache Software Foundation (ASF) under one or more
 # contributor license agreements.  See the NOTICE file distributed with
 # this work for additional information regarding copyright ownership.  The
diff --git a/boards/arm64/rk3399/nanopi_m4/src/etc/init.d/rc.sysinit b/boards/arm64/rk3399/nanopi_m4/src/etc/init.d/rc.sysinit
index b7da80a42e..19dbef71f0 100644
--- a/boards/arm64/rk3399/nanopi_m4/src/etc/init.d/rc.sysinit
+++ b/boards/arm64/rk3399/nanopi_m4/src/etc/init.d/rc.sysinit
@@ -1,6 +1,8 @@
 /****************************************************************************
  * boards/arm64/rk3399/nanopi_m4/src/etc/init.d/rc.sysinit
  *
+ * SPDX-License-Identifier: Apache-2.0
+ *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements.  See the NOTICE file distributed with
  * this work for additional information regarding copyright ownership.  The
diff --git a/boards/arm64/rk3399/nanopi_m4/src/etc/init.d/rcS b/boards/arm64/rk3399/nanopi_m4/src/etc/init.d/rcS
index 7a11a837d2..ccec6292b5 100644
--- a/boards/arm64/rk3399/nanopi_m4/src/etc/init.d/rcS
+++ b/boards/arm64/rk3399/nanopi_m4/src/etc/init.d/rcS
@@ -1,6 +1,8 @@
 /****************************************************************************
  * boards/arm64/rk3399/nanopi_m4/src/etc/init.d/rcS
  *
+ * SPDX-License-Identifier: Apache-2.0
+ *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements.  See the NOTICE file distributed with
  * this work for additional information regarding copyright ownership.  The
diff --git a/boards/arm64/rk3399/nanopi_m4/src/nanopi_m4.h b/boards/arm64/rk3399/nanopi_m4/src/nanopi_m4.h
index cb21bb154b..3a4a21f740 100644
--- a/boards/arm64/rk3399/nanopi_m4/src/nanopi_m4.h
+++ b/boards/arm64/rk3399/nanopi_m4/src/nanopi_m4.h
@@ -1,6 +1,8 @@
 /****************************************************************************
  * boards/arm64/rk3399/nanopi_m4/src/nanopi_m4.h
  *
+ * SPDX-License-Identifier: Apache-2.0
+ *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements.  See the NOTICE file distributed with
  * this work for additional information regarding copyright ownership.  The
diff --git a/boards/arm64/rk3399/nanopi_m4/src/nanopi_m4_appinit.c b/boards/arm64/rk3399/nanopi_m4/src/nanopi_m4_appinit.c
index 81b035ab2d..03ae07d5a1 100644
--- a/boards/arm64/rk3399/nanopi_m4/src/nanopi_m4_appinit.c
+++ b/boards/arm64/rk3399/nanopi_m4/src/nanopi_m4_appinit.c
@@ -1,6 +1,8 @@
 /****************************************************************************
  * boards/arm64/rk3399/nanopi_m4/src/nanopi_m4_appinit.c
  *
+ * SPDX-License-Identifier: Apache-2.0
+ *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements.  See the NOTICE file distributed with
  * this work for additional information regarding copyright ownership.  The
diff --git a/boards/arm64/rk3399/nanopi_m4/src/nanopi_m4_boardinit.c b/boards/arm64/rk3399/nanopi_m4/src/nanopi_m4_boardinit.c
index c735c0d5fd..ea2f99ca8b 100644
--- a/boards/arm64/rk3399/nanopi_m4/src/nanopi_m4_boardinit.c
+++ b/boards/arm64/rk3399/nanopi_m4/src/nanopi_m4_boardinit.c
@@ -1,6 +1,8 @@
 /****************************************************************************
  * boards/arm64/rk3399/nanopi_m4/src/nanopi_m4_boardinit.c
  *
+ * SPDX-License-Identifier: Apache-2.0
+ *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements.  See the NOTICE file distributed with
  * this work for additional information regarding copyright ownership.  The
diff --git a/boards/arm64/rk3399/pinephonepro/include/board.h b/boards/arm64/rk3399/pinephonepro/include/board.h
index 204c5bc2ec..364d7f7dd7 100644
--- a/boards/arm64/rk3399/pinephonepro/include/board.h
+++ b/boards/arm64/rk3399/pinephonepro/include/board.h
@@ -1,6 +1,8 @@
 /****************************************************************************
  * boards/arm64/rk3399/pinephonepro/include/board.h
  *
+ * SPDX-License-Identifier: Apache-2.0
+ *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements.  See the NOTICE file distributed with
  * this work for additional information regarding copyright ownership.  The
diff --git a/boards/arm64/rk3399/pinephonepro/include/board_memorymap.h b/boards/arm64/rk3399/pinephonepro/include/board_memorymap.h
index 7640a97a9a..d4e7ca5906 100644
--- a/boards/arm64/rk3399/pinephonepro/include/board_memorymap.h
+++ b/boards/arm64/rk3399/pinephonepro/include/board_memorymap.h
@@ -1,6 +1,8 @@
 /****************************************************************************
  * boards/arm64/rk3399/pinephonepro/include/board_memorymap.h
  *
+ * SPDX-License-Identifier: Apache-2.0
+ *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements.  See the NOTICE file distributed with
  * this work for additional information regarding copyright ownership.  The
diff --git a/boards/arm64/rk3399/pinephonepro/scripts/Make.defs b/boards/arm64/rk3399/pinephonepro/scripts/Make.defs
index 33517536c2..8a940f88cc 100644
--- a/boards/arm64/rk3399/pinephonepro/scripts/Make.defs
+++ b/boards/arm64/rk3399/pinephonepro/scripts/Make.defs
@@ -1,6 +1,8 @@
 ############################################################################
 # boards/arm64/rk3399/pinephonepro/scripts/Make.defs
 #
+# SPDX-License-Identifier: Apache-2.0
+#
 # Licensed to the Apache Software Foundation (ASF) under one or more
 # contributor license agreements.  See the NOTICE file distributed with
 # this work for additional information regarding copyright ownership.  The
diff --git a/boards/arm64/rk3399/pinephonepro/scripts/dramboot.ld b/boards/arm64/rk3399/pinephonepro/scripts/dramboot.ld
index b9d118b60c..b3dc95a855 100644
--- a/boards/arm64/rk3399/pinephonepro/scripts/dramboot.ld
+++ b/boards/arm64/rk3399/pinephonepro/scripts/dramboot.ld
@@ -1,6 +1,8 @@
 /****************************************************************************
  * boards/arm64/rk3399/pinephone/scripts/dramboot.ld
  *
+ * SPDX-License-Identifier: Apache-2.0
+ *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements.  See the NOTICE file distributed with
  * this work for additional information regarding copyright ownership.  The
diff --git a/boards/arm64/rk3399/pinephonepro/src/Makefile b/boards/arm64/rk3399/pinephonepro/src/Makefile
index c8d544bbc4..ad8f030577 100644
--- a/boards/arm64/rk3399/pinephonepro/src/Makefile
+++ b/boards/arm64/rk3399/pinephonepro/src/Makefile
@@ -1,6 +1,8 @@
 ############################################################################
 # boards/arm64/rk3399/pinephonepro/src/Makefile
 #
+# SPDX-License-Identifier: Apache-2.0
+#
 # Licensed to the Apache Software Foundation (ASF) under one or more
 # contributor license agreements.  See the NOTICE file distributed with
 # this work for additional information regarding copyright ownership.  The
diff --git a/boards/arm64/rk3399/pinephonepro/src/pinephonepro.h b/boards/arm64/rk3399/pinephonepro/src/pinephonepro.h
index 5f50e71b8a..5b476a1121 100644
--- a/boards/arm64/rk3399/pinephonepro/src/pinephonepro.h
+++ b/boards/arm64/rk3399/pinephonepro/src/pinephonepro.h
@@ -1,6 +1,8 @@
 /****************************************************************************
  * boards/arm64/rk3399/pinephonepro/src/pinephonepro.h
  *
+ * SPDX-License-Identifier: Apache-2.0
+ *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements.  See the NOTICE file distributed with
  * this work for additional information regarding copyright ownership.  The
diff --git a/boards/arm64/rk3399/pinephonepro/src/pinephonepro_appinit.c b/boards/arm64/rk3399/pinephonepro/src/pinephonepro_appinit.c
index ea732f9ca6..9208f94f71 100644
--- a/boards/arm64/rk3399/pinephonepro/src/pinephonepro_appinit.c
+++ b/boards/arm64/rk3399/pinephonepro/src/pinephonepro_appinit.c
@@ -1,6 +1,8 @@
 /****************************************************************************
  * boards/arm64/rk3399/pinephonepro/src/pinephonepro_appinit.c
  *
+ * SPDX-License-Identifier: Apache-2.0
+ *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements.  See the NOTICE file distributed with
  * this work for additional information regarding copyright ownership.  The
diff --git a/boards/arm64/rk3399/pinephonepro/src/pinephonepro_boardinit.c b/boards/arm64/rk3399/pinephonepro/src/pinephonepro_boardinit.c
index a72ca8ebf6..15011b194e 100644
--- a/boards/arm64/rk3399/pinephonepro/src/pinephonepro_boardinit.c
+++ b/boards/arm64/rk3399/pinephonepro/src/pinephonepro_boardinit.c
@@ -1,6 +1,8 @@
 /****************************************************************************
  * boards/arm64/rk3399/pinephonepro/src/pinephonepro_boardinit.c
  *
+ * SPDX-License-Identifier: Apache-2.0
+ *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements.  See the NOTICE file distributed with
  * this work for additional information regarding copyright ownership.  The
diff --git a/boards/arm64/rk3399/pinephonepro/src/pinephonepro_bringup.c b/boards/arm64/rk3399/pinephonepro/src/pinephonepro_bringup.c
index b6e1d85a60..827b49d9bf 100644
--- a/boards/arm64/rk3399/pinephonepro/src/pinephonepro_bringup.c
+++ b/boards/arm64/rk3399/pinephonepro/src/pinephonepro_bringup.c
@@ -1,6 +1,8 @@
 /****************************************************************************
  * boards/arm64/rk3399/pinephonepro/src/pinephonepro_bringup.c
  *
+ * SPDX-License-Identifier: Apache-2.0
+ *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements.  See the NOTICE file distributed with
  * this work for additional information regarding copyright ownership.  The
diff --git a/boards/arm64/rk3399/pinephonepro/src/pinephonepro_reset.c b/boards/arm64/rk3399/pinephonepro/src/pinephonepro_reset.c
index 0e44a2eb64..dbb512448c 100644
--- a/boards/arm64/rk3399/pinephonepro/src/pinephonepro_reset.c
+++ b/boards/arm64/rk3399/pinephonepro/src/pinephonepro_reset.c
@@ -1,6 +1,8 @@
 /****************************************************************************
  * boards/arm64/rk3399/pinephonepro/src/pinephonepro_reset.c
  *
+ * SPDX-License-Identifier: Apache-2.0
+ *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements.  See the NOTICE file distributed with
  * this work for additional information regarding copyright ownership.  The