diff --git a/arch/arm64/boot/dts/arm/foundation-v8-gicv2.dtsi b/arch/arm64/boot/dts/arm/foundation-v8-gicv2.dtsi
index 53fa6b9fd86fb..db61c828ff8e4 100644
--- a/arch/arm64/boot/dts/arm/foundation-v8-gicv2.dtsi
+++ b/arch/arm64/boot/dts/arm/foundation-v8-gicv2.dtsi
@@ -1,6 +1,6 @@
 // SPDX-License-Identifier: (GPL-2.0 OR MIT)
 /*
- * ARM Ltd.
+ * Copyright (c) 2012-2022 Arm Ltd.
  *
  * ARMv8 Foundation model DTS (GICv2 configuration)
  */
diff --git a/arch/arm64/boot/dts/arm/foundation-v8-gicv3-psci.dts b/arch/arm64/boot/dts/arm/foundation-v8-gicv3-psci.dts
index 32c16d7f216ab..b2f8ceeb4d51c 100644
--- a/arch/arm64/boot/dts/arm/foundation-v8-gicv3-psci.dts
+++ b/arch/arm64/boot/dts/arm/foundation-v8-gicv3-psci.dts
@@ -1,6 +1,6 @@
 // SPDX-License-Identifier: (GPL-2.0 OR MIT)
 /*
- * ARM Ltd.
+ * Copyright (c) 2012-2022 Arm Ltd.
  *
  * ARMv8 Foundation model DTS (GICv3+PSCI configuration)
  */
diff --git a/arch/arm64/boot/dts/arm/foundation-v8-gicv3.dts b/arch/arm64/boot/dts/arm/foundation-v8-gicv3.dts
index e1426de132560..81dd879379d72 100644
--- a/arch/arm64/boot/dts/arm/foundation-v8-gicv3.dts
+++ b/arch/arm64/boot/dts/arm/foundation-v8-gicv3.dts
@@ -1,6 +1,6 @@
 // SPDX-License-Identifier: (GPL-2.0 OR MIT)
 /*
- * ARM Ltd.
+ * Copyright (c) 2012-2022 Arm Ltd.
  *
  * ARMv8 Foundation model DTS (GICv3 configuration)
  */
diff --git a/arch/arm64/boot/dts/arm/foundation-v8-gicv3.dtsi b/arch/arm64/boot/dts/arm/foundation-v8-gicv3.dtsi
index dd2d305b53393..83f24b2cb0586 100644
--- a/arch/arm64/boot/dts/arm/foundation-v8-gicv3.dtsi
+++ b/arch/arm64/boot/dts/arm/foundation-v8-gicv3.dtsi
@@ -1,6 +1,6 @@
 // SPDX-License-Identifier: (GPL-2.0 OR MIT)
 /*
- * ARM Ltd.
+ * Copyright (c) 2012-2022 Arm Ltd.
  *
  * ARMv8 Foundation model DTS (GICv3 configuration)
  */
diff --git a/arch/arm64/boot/dts/arm/foundation-v8-psci.dts b/arch/arm64/boot/dts/arm/foundation-v8-psci.dts
index 1d6c6bcb08cdd..5afc1cd59b5cf 100644
--- a/arch/arm64/boot/dts/arm/foundation-v8-psci.dts
+++ b/arch/arm64/boot/dts/arm/foundation-v8-psci.dts
@@ -1,6 +1,6 @@
 // SPDX-License-Identifier: (GPL-2.0 OR MIT)
 /*
- * ARM Ltd.
+ * Copyright (c) 2012-2022 Arm Ltd.
  *
  * ARMv8 Foundation model DTS (GICv2+PSCI configuration)
  */
diff --git a/arch/arm64/boot/dts/arm/foundation-v8-psci.dtsi b/arch/arm64/boot/dts/arm/foundation-v8-psci.dtsi
index f9589905dc024..bf748a0db4fa6 100644
--- a/arch/arm64/boot/dts/arm/foundation-v8-psci.dtsi
+++ b/arch/arm64/boot/dts/arm/foundation-v8-psci.dtsi
@@ -1,6 +1,6 @@
 // SPDX-License-Identifier: (GPL-2.0 OR MIT)
 /*
- * ARM Ltd.
+ * Copyright (c) 2012-2022 Arm Ltd.
  *
  * ARMv8 Foundation model DTS (PSCI configuration)
  */
diff --git a/arch/arm64/boot/dts/arm/foundation-v8-spin-table.dtsi b/arch/arm64/boot/dts/arm/foundation-v8-spin-table.dtsi
index 6796bbb5eef05..b9352ccff0194 100644
--- a/arch/arm64/boot/dts/arm/foundation-v8-spin-table.dtsi
+++ b/arch/arm64/boot/dts/arm/foundation-v8-spin-table.dtsi
@@ -1,6 +1,6 @@
 // SPDX-License-Identifier: (GPL-2.0 OR MIT)
 /*
- * ARM Ltd.
+ * Copyright (c) 2012-2022 Arm Ltd.
  *
  * ARMv8 Foundation model DTS (spin table configuration)
  */
diff --git a/arch/arm64/boot/dts/arm/foundation-v8.dts b/arch/arm64/boot/dts/arm/foundation-v8.dts
index a73bf774c7603..e1bae3f8de702 100644
--- a/arch/arm64/boot/dts/arm/foundation-v8.dts
+++ b/arch/arm64/boot/dts/arm/foundation-v8.dts
@@ -1,10 +1,9 @@
 // SPDX-License-Identifier: (GPL-2.0 OR MIT)
 /*
- * ARM Ltd.
+ * Copyright (c) 2012-2022 Arm Ltd.
  *
  * ARMv8 Foundation model DTS (GICv2 configuration)
  */
-
 #include "foundation-v8.dtsi"
 #include "foundation-v8-gicv2.dtsi"
 #include "foundation-v8-spin-table.dtsi"
diff --git a/arch/arm64/boot/dts/arm/foundation-v8.dtsi b/arch/arm64/boot/dts/arm/foundation-v8.dtsi
index 152bc7f0f37cb..5ad4102d6073c 100644
--- a/arch/arm64/boot/dts/arm/foundation-v8.dtsi
+++ b/arch/arm64/boot/dts/arm/foundation-v8.dtsi
@@ -1,6 +1,6 @@
 // SPDX-License-Identifier: (GPL-2.0 OR MIT)
 /*
- * ARM Ltd.
+ * Copyright (c) 2012-2022 Arm Ltd.
  *
  * ARMv8 Foundation model DTS
  */
diff --git a/arch/arm64/boot/dts/arm/juno-base.dtsi b/arch/arm64/boot/dts/arm/juno-base.dtsi
index 5f89d984b031e..ae890f3b448ee 100644
--- a/arch/arm64/boot/dts/arm/juno-base.dtsi
+++ b/arch/arm64/boot/dts/arm/juno-base.dtsi
@@ -1,4 +1,9 @@
 // SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+/*
+ * Arm Juno board common peripheral definitions
+ *
+ * Copyright (c) 2014-2022 Arm Ltd.
+ */
 #include "juno-clocks.dtsi"
 #include "juno-motherboard.dtsi"
 
diff --git a/arch/arm64/boot/dts/arm/juno-r1-scmi.dts b/arch/arm64/boot/dts/arm/juno-r1-scmi.dts
index e63543c624f4a..d554ce3794f0d 100644
--- a/arch/arm64/boot/dts/arm/juno-r1-scmi.dts
+++ b/arch/arm64/boot/dts/arm/juno-r1-scmi.dts
@@ -1,4 +1,9 @@
 // SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+/*
+ * SCMI definitions specific to the Arm Juno R1 board
+ *
+ * Copyright (c) 2022 Arm Ltd.
+ */
 #include "juno-r1.dts"
 #include "juno-scmi.dtsi"
 
diff --git a/arch/arm64/boot/dts/arm/juno-r2-scmi.dts b/arch/arm64/boot/dts/arm/juno-r2-scmi.dts
index 6c80f08b3ec2e..9781dcb9f2e14 100644
--- a/arch/arm64/boot/dts/arm/juno-r2-scmi.dts
+++ b/arch/arm64/boot/dts/arm/juno-r2-scmi.dts
@@ -1,4 +1,9 @@
 // SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+/*
+ * SCMI definitions specific to the Arm Juno R2 board
+ *
+ * Copyright (c) 2022 Arm Ltd.
+ */
 #include "juno-r2.dts"
 #include "juno-scmi.dtsi"
 
diff --git a/arch/arm64/boot/dts/arm/juno-scmi.dts b/arch/arm64/boot/dts/arm/juno-scmi.dts
index 51844a407a7dd..56880d8fd1ff0 100644
--- a/arch/arm64/boot/dts/arm/juno-scmi.dts
+++ b/arch/arm64/boot/dts/arm/juno-scmi.dts
@@ -1,4 +1,5 @@
 // SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+/* Copyright (c) 2022 Arm Ltd. */
 #include "juno.dts"
 #include "juno-scmi.dtsi"
 
diff --git a/arch/arm64/boot/dts/arm/juno-scmi.dtsi b/arch/arm64/boot/dts/arm/juno-scmi.dtsi
index c6f4b80d3dff0..d78f595b30600 100644
--- a/arch/arm64/boot/dts/arm/juno-scmi.dtsi
+++ b/arch/arm64/boot/dts/arm/juno-scmi.dtsi
@@ -1,4 +1,9 @@
 // SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+/*
+ * SCMI definitions shared by all Arm Juno boards
+ *
+ * Copyright (c) 2022 Arm Ltd.
+ */
 / {
 	etf@20010000 {
 		power-domains = <&scmi_devpd 8>;
diff --git a/arch/arm64/boot/dts/arm/rtsm_ve-aemv8a.dts b/arch/arm64/boot/dts/arm/rtsm_ve-aemv8a.dts
index 5b514c865845d..1fecc3f3655eb 100644
--- a/arch/arm64/boot/dts/arm/rtsm_ve-aemv8a.dts
+++ b/arch/arm64/boot/dts/arm/rtsm_ve-aemv8a.dts
@@ -2,6 +2,8 @@
 /*
  * ARM Ltd. Fast Models
  *
+ * Copyright (c) 2012-2022 Arm Ltd.
+ *
  * Architecture Envelope Model (AEM) ARMv8-A
  * ARMAEMv8AMPCT
  *
diff --git a/arch/arm64/boot/dts/arm/rtsm_ve-motherboard.dtsi b/arch/arm64/boot/dts/arm/rtsm_ve-motherboard.dtsi
index 5f8f17d6c8e59..5b525a7063d37 100644
--- a/arch/arm64/boot/dts/arm/rtsm_ve-motherboard.dtsi
+++ b/arch/arm64/boot/dts/arm/rtsm_ve-motherboard.dtsi
@@ -2,6 +2,8 @@
 /*
  * ARM Ltd. Fast Models
  *
+ * Copyright (c) 2012-2022 Arm Ltd.
+ *
  * Versatile Express (VE) system model
  * Motherboard component
  *
diff --git a/arch/arm64/boot/dts/arm/vexpress-v2f-1xv7-ca53x2.dts b/arch/arm64/boot/dts/arm/vexpress-v2f-1xv7-ca53x2.dts
index 8cb44b0577ca5..72a0c1dcc48fd 100644
--- a/arch/arm64/boot/dts/arm/vexpress-v2f-1xv7-ca53x2.dts
+++ b/arch/arm64/boot/dts/arm/vexpress-v2f-1xv7-ca53x2.dts
@@ -1,8 +1,8 @@
 // SPDX-License-Identifier: (GPL-2.0 OR MIT)
 /*
- * ARM Ltd. Versatile Express
+ * Copyright (c) 2012-2022 Arm Ltd.
  *
- * LogicTile Express 20MG
+ * ARM Ltd. Versatile Express LogicTile Express 20MG
  * V2F-1XV7
  *
  * Cortex-A53 (2 cores) Soft Macrocell Model
