diff --git a/overlay/jetson-adafruit-sph0645lm4h.dtsi b/overlay/jetson-adafruit-sph0645lm4h.dtsi
index ae9e832..9da3843 100644
--- a/overlay/jetson-adafruit-sph0645lm4h.dtsi
+++ b/overlay/jetson-adafruit-sph0645lm4h.dtsi
@@ -1,10 +1,22 @@
-// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (c) 2019-2020, NVIDIA CORPORATION.  All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
 /*
  * Jetson Device-tree overlay for Adafruit I2S MEMS Microphone Breakout
  * (SPH0645LM4H).
- *
- * Copyright (c) 2019 NVIDIA CORPORATION. All rights reserved.
- *
  */
 
 #include <dt-bindings/pinctrl/pinctrl-tegra.h>
diff --git a/overlay/jetson-fe-pi-audio-z-v2.dts b/overlay/jetson-fe-pi-audio-z-v2.dts
index 0450762..7977d51 100644
--- a/overlay/jetson-fe-pi-audio-z-v2.dts
+++ b/overlay/jetson-fe-pi-audio-z-v2.dts
@@ -1,9 +1,21 @@
-// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (c) 2019-2020, NVIDIA CORPORATION.  All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
 /*
  * Jetson Device-tree overlay for FE-PI Audio Z V2.
- *
- * Copyright (c) 2019 NVIDIA CORPORATION. All rights reserved.
- *
  */
 
 #include <dt-bindings/pinctrl/pinctrl-tegra.h>
diff --git a/overlay/jetson-mcp251x.dtsi b/overlay/jetson-mcp251x.dtsi
index 738bb1a..3923992 100644
--- a/overlay/jetson-mcp251x.dtsi
+++ b/overlay/jetson-mcp251x.dtsi
@@ -1,9 +1,21 @@
-// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (c) 2020, NVIDIA CORPORATION.  All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
 /*
  * Jetson Device-tree overlay for MCP251x CAN Controller.
- *
- * Copyright (c) 2020 NVIDIA CORPORATION. All rights reserved.
- *
  */
 
 #include <dt-bindings/pinctrl/pinctrl-tegra.h>
diff --git a/overlay/jetson-respeaker-4-mic-array.dtsi b/overlay/jetson-respeaker-4-mic-array.dtsi
index 3c285b3..dca61a2 100644
--- a/overlay/jetson-respeaker-4-mic-array.dtsi
+++ b/overlay/jetson-respeaker-4-mic-array.dtsi
@@ -1,9 +1,21 @@
-// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (c) 2020, NVIDIA CORPORATION.  All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
 /*
  * Jetson Device-tree overlay for ReSpeaker 4 Mic Array.
- *
- * Copyright (c) 2020 NVIDIA CORPORATION. All rights reserved.
- *
  */
 
 #include <dt-bindings/pinctrl/pinctrl-tegra.h>