diff --git a/mailbox/mailbox.dtsi b/mailbox/mailbox.dtsi
new file mode 100644
index 0000000..900326f
--- /dev/null
+++ b/mailbox/mailbox.dtsi
@@ -0,0 +1,40 @@
+/*
+ * (C) COPYRIGHT 2020 ARM Limited. All rights reserved.
+ *
+ * This program is free software and is provided to you under the terms of the
+ * GNU General Public License version 2 as published by the Free Software
+ * Foundation, and any use by you of this program is subject to the terms
+ * of such GNU licence.
+ *
+ * This program is distributed in the hope that 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, you can access it online at
+ * http://www.gnu.org/licenses/gpl-2.0.html.
+ *
+ * SPDX-License-Identifier: GPL-2.0-only
+ */
+ 
+ /* Example for mailbox driver dts entries */
+
+/{
+       ethosu_mailbox: mhu@6ca00000 {
+               compatible = "arm,mini_mhu", "arm,primecell";
+               reg = <0x0 0x6ca00000 0x0 0x1000>;
+               interrupts = <0 168 4>;
+               interrupt-names = "mhu_npu_rx";
+               #mbox-cells = <1>;
+               clocks = <&soc_refclk100mhz>;
+               clock-names = "apb_pclk";
+       };
+
+       mailbox_test {
+               compatible      = "mailbox-test";
+               reg             = <0x0 0x84000000 0x0 0x10000>, <0x0 0x84010000 0x0 0x10000>;
+               mboxes          = <&ethosu_mailbox 0>, <&ethosu_mailbox 0>;
+               mbox-names      = "tx", "rx";
+       };
+};