Index: head/sys/dts/arm64/overlays/spigen-rpi3.dtso
===================================================================
--- head/sys/dts/arm64/overlays/spigen-rpi3.dtso	(revision 361781)
+++ head/sys/dts/arm64/overlays/spigen-rpi3.dtso	(revision 361782)
@@ -1,30 +1,57 @@
-/* $FreeBSD$ */
+/*-
+ * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
+ *
+ * Copyright (c) 2019 Bob Frazier <bobf@mrp3.com>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * $FreeBSD$
+ */
 
 /dts-v1/;
 /plugin/;
 
 / {
 	compatible = "brcm,bcm2837";
 };
 	
 &{/soc/spi@7e204000} {
 	status = "okay";
 	spigen0: spigen0 {
 		compatible = "freebsd,spigen";
 		reg = <0>;
 		spi-max-frequency = <500000>; /* Req'd property, override with spi(8) */
 		status = "okay";
 	};
 	spigen1: spigen1 {
 		compatible = "freebsd,spigen";
 		reg = <1>;
 		spi-max-frequency = <500000>; /* Req'd property, override with spi(8) */
 		status = "okay";
 	};
 };
 
 &{/soc/gpio@7e200000/spi0_cs_pins} {
 	brcm,pins = <8 7>;
 	brcm,function = <4>; /* ALT0 */
 };
 
Index: head/sys/dts/arm64/overlays/spigen-rpi4.dtso
===================================================================
--- head/sys/dts/arm64/overlays/spigen-rpi4.dtso	(revision 361781)
+++ head/sys/dts/arm64/overlays/spigen-rpi4.dtso	(revision 361782)
@@ -1,30 +1,57 @@
-/* $FreeBSD$ */
+/*-
+ * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
+ *
+ * Copyright (c) 2020 Gergely Czuczy <gergely.czuczy@harmless.hu>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * $FreeBSD$
+ */
 
 /dts-v1/;
 /plugin/;
 
 / {
 	compatible = "brcm,bcm2711";
 };
 	
 &{/soc/spi@7e204000} {
 	status = "okay";
 	spigen0: spigen0 {
 		compatible = "freebsd,spigen";
 		reg = <0>;
 		spi-max-frequency = <500000>; /* Req'd property, override with spi(8) */
 		status = "okay";
 	};
 	spigen1: spigen1 {
 		compatible = "freebsd,spigen";
 		reg = <1>;
 		spi-max-frequency = <500000>; /* Req'd property, override with spi(8) */
 		status = "okay";
 	};
 };
 
 &{/soc/gpio@7e200000/spi0_cs_pins} {
 	brcm,pins = <8 7>;
 	brcm,function = <4>; /* ALT0 */
 };