diff --git a/LICENSE b/LICENSE
index b1fd772e71..f848da07f2 100644
--- a/LICENSE
+++ b/LICENSE
@@ -1679,6 +1679,51 @@ TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
 SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 
 
+arch/arm/src/nrf52/nrf52_flash.c
+arch/arm/src/nrf52/nrf52_nvmc.c
+arch/arm/src/nrf52/nrf52_nvmc.h
+arch/arm/src/nrf52/nrf52_wdt.c
+arch/arm/src/nrf52/nrf52_wdt_lowerhalf.c
+arch/arm/src/nrf52/nrf52_wdt_lowerhalf.h
+=====================================
+
+  Copyright (C) 2018 Zglue Inc. All rights reserved.
+  Author: Levin Li <zhiqiang@zglue.com>
+  Author: Alan Carvalho de Assis <acassis@gmail.com>
+
+Ported from the Nordic SDK, this is the original license:
+
+Copyright (c) 2012 - 2018, Nordic Semiconductor ASA
+All rights reserved.
+
+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.
+
+3. Neither the name of the copyright holder nor the names of its
+   contributors may be used to endorse or promote products derived from
+   this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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 COPYRIGHT HOLDER 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.
+
+
 arch/arm/src/xmc4/hardware/xmc4_ethernet.h
 arch/arm/src/xmc4/hardware/xmc4_flash.h
 arch/arm/src/xmc4/hardware/xmc4_memorymap.h