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acassis pushed a commit to branch master
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commit 3d9a64ce27634c807725d0f99d3f05973fcc5858
Author: raiden00pl <[email protected]>
AuthorDate: Sat Jul 1 11:11:18 2023 +0200

    boards: initial support for nrf9160-dk
---
 boards/Kconfig                                     |  13 ++
 boards/arm/nrf91/common/Kconfig                    |   4 +
 boards/arm/nrf91/common/Makefile                   |  33 +++++
 boards/arm/nrf91/common/include/nrf91_timer.h      |  55 ++++++++
 boards/arm/nrf91/common/src/Make.defs              |  31 +++++
 boards/arm/nrf91/common/src/nrf91_timer.c          |  55 ++++++++
 boards/arm/nrf91/nrf9160-dk/Kconfig                |   8 ++
 boards/arm/nrf91/nrf9160-dk/configs/nsh/defconfig  |  42 ++++++
 .../nrf9160-dk/configs/ostest_tickless/defconfig   |  50 +++++++
 boards/arm/nrf91/nrf9160-dk/include/board.h        | 106 +++++++++++++++
 boards/arm/nrf91/nrf9160-dk/scripts/Make.defs      |  38 ++++++
 boards/arm/nrf91/nrf9160-dk/scripts/flash_app.ld   | 116 ++++++++++++++++
 boards/arm/nrf91/nrf9160-dk/src/Make.defs          |  41 ++++++
 boards/arm/nrf91/nrf9160-dk/src/nrf9160-dk.h       |  96 +++++++++++++
 boards/arm/nrf91/nrf9160-dk/src/nrf91_appinit.c    |  88 ++++++++++++
 boards/arm/nrf91/nrf9160-dk/src/nrf91_autoleds.c   | 127 +++++++++++++++++
 boards/arm/nrf91/nrf9160-dk/src/nrf91_boot.c       |  79 +++++++++++
 boards/arm/nrf91/nrf9160-dk/src/nrf91_bringup.c    | 136 +++++++++++++++++++
 boards/arm/nrf91/nrf9160-dk/src/nrf91_buttons.c    | 151 +++++++++++++++++++++
 boards/arm/nrf91/nrf9160-dk/src/nrf91_userleds.c   | 148 ++++++++++++++++++++
 20 files changed, 1417 insertions(+)

diff --git a/boards/Kconfig b/boards/Kconfig
index 55cd67db01..f337e59b59 100644
--- a/boards/Kconfig
+++ b/boards/Kconfig
@@ -1137,6 +1137,15 @@ config ARCH_BOARD_THINGY53
        ---help---
                This option selects the Thingy:53 multi-protocol IoT 
prototyping platform
 
+config ARCH_BOARD_NRF9160_DK
+       bool "Nordic nRF9160 Development Kit (PCA10090)"
+       depends on ARCH_CHIP_NRF91
+       select ARCH_HAVE_LEDS
+       select ARCH_HAVE_BUTTONS
+       select ARCH_HAVE_IRQBUTTONS
+       ---help---
+               This option selects the nRF9160 Development Kit (PCA10090)
+
 config ARCH_BOARD_NUTINY_NUC120
        bool "Nuvoton NuTiny NUC120"
        depends on ARCH_CHIP_NUC120LE3AN
@@ -2953,6 +2962,7 @@ config ARCH_BOARD
        default "nrf5340-dk"                if ARCH_BOARD_NRF5340_DK
        default "nrf5340-audio-dk"          if ARCH_BOARD_NRF5340_AUDIO_DK
        default "thingy53"                  if ARCH_BOARD_THINGY53
+       default "nrf9160-dk"                if ARCH_BOARD_NRF9160_DK
        default "ntosd-dm320"               if ARCH_BOARD_NTOSD_DM320
        default "nucleo-144"                if ARCH_BOARD_NUCLEO_144
        default "nucleo-f072rb"             if ARCH_BOARD_NUCLEO_F072RB
@@ -4046,6 +4056,9 @@ endif
 if ARCH_CHIP_NRF53
 source "boards/arm/nrf53/common/Kconfig"
 endif
+if ARCH_CHIP_NRF91
+source "boards/arm/nrf91/common/Kconfig"
+endif
 endif
 
 config BOARD_CRASHDUMP
diff --git a/boards/arm/nrf91/common/Kconfig b/boards/arm/nrf91/common/Kconfig
new file mode 100644
index 0000000000..f72f3c094c
--- /dev/null
+++ b/boards/arm/nrf91/common/Kconfig
@@ -0,0 +1,4 @@
+#
+# For a description of the syntax of this configuration file,
+# see the file kconfig-language.txt in the NuttX tools repository.
+#
diff --git a/boards/arm/nrf91/common/Makefile b/boards/arm/nrf91/common/Makefile
new file mode 100644
index 0000000000..21a3811ada
--- /dev/null
+++ b/boards/arm/nrf91/common/Makefile
@@ -0,0 +1,33 @@
+#############################################################################
+# boards/arm/nrf91/common/Makefile
+#
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.  The
+# ASF licenses this file to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance with the
+# License.  You may obtain a copy of the License at
+#
+#   http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
+# License for the specific language governing permissions and limitations
+# under the License.
+#
+#############################################################################
+
+include $(TOPDIR)/Make.defs
+
+include board/Make.defs
+include src/Make.defs
+
+DEPPATH += --dep-path board
+DEPPATH += --dep-path src
+
+include $(TOPDIR)/boards/Board.mk
+
+ARCHSRCDIR = $(TOPDIR)$(DELIM)arch$(DELIM)$(CONFIG_ARCH)$(DELIM)src
+BOARDDIR = $(ARCHSRCDIR)$(DELIM)board
+CFLAGS += ${INCDIR_PREFIX}$(BOARDDIR)$(DELIM)include
diff --git a/boards/arm/nrf91/common/include/nrf91_timer.h 
b/boards/arm/nrf91/common/include/nrf91_timer.h
new file mode 100644
index 0000000000..08b5dce39b
--- /dev/null
+++ b/boards/arm/nrf91/common/include/nrf91_timer.h
@@ -0,0 +1,55 @@
+/****************************************************************************
+ * boards/arm/nrf91/common/include/nrf91_timer.h
+ *
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.  The
+ * ASF licenses this file to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance with the
+ * License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
+ * License for the specific language governing permissions and limitations
+ * under the License.
+ *
+ ****************************************************************************/
+
+#ifndef __BOARDS_ARM_NRF91_COMMON_INCLUDE_NRF91_TIMER_H
+#define __BOARDS_ARM_NRF91_COMMON_INCLUDE_NRF91_TIMER_H
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+
+#include <nuttx/timers/timer.h>
+
+/****************************************************************************
+ * Public Functions Prototypes
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: nrf91_timer_driver_setup
+ *
+ * Description:
+ *   Configure the timer driver.
+ *
+ * Input Parameters:
+ *   devpath - The full path to the timer device.  This should be of the
+ *             form /dev/timer0
+ *   timer   - The timer's number.
+ *
+ * Returned Value:
+ *   Zero (OK) is returned on success; A negated errno value is returned
+ *   to indicate the nature of any failure.
+ *
+ ****************************************************************************/
+
+int nrf91_timer_driver_setup(const char *devpath, int timer);
+
+#endif /* __BOARDS_ARM_NRF91_COMMON_INCLUDE_NRF91_TIMER_H */
diff --git a/boards/arm/nrf91/common/src/Make.defs 
b/boards/arm/nrf91/common/src/Make.defs
new file mode 100644
index 0000000000..8f0f1edeb7
--- /dev/null
+++ b/boards/arm/nrf91/common/src/Make.defs
@@ -0,0 +1,31 @@
+#############################################################################
+# boards/arm/nrf91/common/src/Make.defs
+#
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.  The
+# ASF licenses this file to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance with the
+# License.  You may obtain a copy of the License at
+#
+#   http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
+# License for the specific language governing permissions and limitations
+# under the License.
+#
+#############################################################################
+
+ifeq ($(CONFIG_ARCH_BOARD_COMMON),y)
+
+ifeq ($(CONFIG_NRF91_TIMER),y)
+  CSRCS += nrf91_timer.c
+endif
+
+DEPPATH += --dep-path src
+VPATH += :src
+CFLAGS += 
${INCDIR_PREFIX}$(TOPDIR)$(DELIM)arch$(DELIM)$(CONFIG_ARCH)$(DELIM)src$(DELIM)board$(DELIM)src
+
+endif
diff --git a/boards/arm/nrf91/common/src/nrf91_timer.c 
b/boards/arm/nrf91/common/src/nrf91_timer.c
new file mode 100644
index 0000000000..9efae748cd
--- /dev/null
+++ b/boards/arm/nrf91/common/src/nrf91_timer.c
@@ -0,0 +1,55 @@
+/****************************************************************************
+ * boards/arm/nrf91/common/src/nrf91_timer.c
+ *
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.  The
+ * ASF licenses this file to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance with the
+ * License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
+ * License for the specific language governing permissions and limitations
+ * under the License.
+ *
+ ****************************************************************************/
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+
+#include <nuttx/timers/timer.h>
+
+#include "nrf91_tim_lowerhalf.h"
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: nrf91_timer_driver_setup
+ *
+ * Description:
+ *   Configure the timer driver.
+ *
+ * Input Parameters:
+ *   devpath - The full path to the timer device.  This should be of the
+ *             form /dev/timer0
+ *   timer   - The timer's number.
+ *
+ * Returned Value:
+ *   Zero (OK) is returned on success; A negated errno value is returned
+ *   to indicate the nature of any failure.
+ *
+ ****************************************************************************/
+
+int nrf91_timer_driver_setup(const char *devpath, int timer)
+{
+  return nrf91_timer_initialize(devpath, timer);
+}
diff --git a/boards/arm/nrf91/nrf9160-dk/Kconfig 
b/boards/arm/nrf91/nrf9160-dk/Kconfig
new file mode 100644
index 0000000000..45d49da555
--- /dev/null
+++ b/boards/arm/nrf91/nrf9160-dk/Kconfig
@@ -0,0 +1,8 @@
+#
+# For a description of the syntax of this configuration file,
+# see the file kconfig-language.txt in the NuttX tools repository.
+#
+
+if ARCH_BOARD_NRF9160_DK
+
+endif
diff --git a/boards/arm/nrf91/nrf9160-dk/configs/nsh/defconfig 
b/boards/arm/nrf91/nrf9160-dk/configs/nsh/defconfig
new file mode 100644
index 0000000000..0fa26617b4
--- /dev/null
+++ b/boards/arm/nrf91/nrf9160-dk/configs/nsh/defconfig
@@ -0,0 +1,42 @@
+#
+# This file is autogenerated: PLEASE DO NOT EDIT IT.
+#
+# You can use "make menuconfig" to make any modifications to the installed 
.config file.
+# You can then do "make savedefconfig" to generate a new defconfig file that 
includes your
+# modifications.
+#
+# CONFIG_NSH_DISABLE_IFCONFIG is not set
+# CONFIG_NSH_DISABLE_PS is not set
+# CONFIG_STANDARD_SERIAL is not set
+CONFIG_ARCH="arm"
+CONFIG_ARCH_BOARD="nrf9160-dk"
+CONFIG_ARCH_BOARD_NRF9160_DK=y
+CONFIG_ARCH_CHIP="nrf91"
+CONFIG_ARCH_CHIP_NRF9160=y
+CONFIG_ARCH_CHIP_NRF91=y
+CONFIG_ARCH_STACKDUMP=y
+CONFIG_ARCH_STDARG_H=y
+CONFIG_BOARD_LOOPSPERMSEC=5500
+CONFIG_DEBUG_FEATURES=y
+CONFIG_DEBUG_FULLOPT=y
+CONFIG_DEBUG_SYMBOLS=y
+CONFIG_EXPERIMENTAL=y
+CONFIG_INIT_ENTRYPOINT="nsh_main"
+CONFIG_MM_REGIONS=2
+CONFIG_NRF91_UART0=y
+CONFIG_NSH_ARCHINIT=y
+CONFIG_NSH_FILEIOSIZE=512
+CONFIG_NSH_LINELEN=64
+CONFIG_NSH_READLINE=y
+CONFIG_PREALLOC_TIMERS=4
+CONFIG_RAM_SIZE=262144
+CONFIG_RAM_START=0x20000000
+CONFIG_RAW_BINARY=y
+CONFIG_RR_INTERVAL=200
+CONFIG_SCHED_WAITPID=y
+CONFIG_START_DAY=26
+CONFIG_START_MONTH=3
+CONFIG_SYMTAB_ORDEREDBYNAME=y
+CONFIG_SYSTEM_NSH=y
+CONFIG_TASK_NAME_SIZE=0
+CONFIG_UART0_SERIAL_CONSOLE=y
diff --git a/boards/arm/nrf91/nrf9160-dk/configs/ostest_tickless/defconfig 
b/boards/arm/nrf91/nrf9160-dk/configs/ostest_tickless/defconfig
new file mode 100644
index 0000000000..9e9aea7b69
--- /dev/null
+++ b/boards/arm/nrf91/nrf9160-dk/configs/ostest_tickless/defconfig
@@ -0,0 +1,50 @@
+#
+# This file is autogenerated: PLEASE DO NOT EDIT IT.
+#
+# You can use "make menuconfig" to make any modifications to the installed 
.config file.
+# You can then do "make savedefconfig" to generate a new defconfig file that 
includes your
+# modifications.
+#
+# CONFIG_NSH_DISABLE_IFCONFIG is not set
+# CONFIG_NSH_DISABLE_PS is not set
+# CONFIG_STANDARD_SERIAL is not set
+CONFIG_ARCH="arm"
+CONFIG_ARCH_BOARD="nrf9160-dk"
+CONFIG_ARCH_BOARD_NRF9160_DK=y
+CONFIG_ARCH_CHIP="nrf91"
+CONFIG_ARCH_CHIP_NRF9160=y
+CONFIG_ARCH_CHIP_NRF91=y
+CONFIG_ARCH_STACKDUMP=y
+CONFIG_ARCH_STDARG_H=y
+CONFIG_BOARD_LOOPSPERMSEC=5500
+CONFIG_BUILTIN=y
+CONFIG_DEBUG_FEATURES=y
+CONFIG_DEBUG_FULLOPT=y
+CONFIG_DEBUG_SYMBOLS=y
+CONFIG_EXPERIMENTAL=y
+CONFIG_INIT_ENTRYPOINT="nsh_main"
+CONFIG_INTELHEX_BINARY=y
+CONFIG_MM_REGIONS=2
+CONFIG_NRF91_RTC0=y
+CONFIG_NRF91_SYSTIMER_RTC=y
+CONFIG_NRF91_UART0=y
+CONFIG_NSH_ARCHINIT=y
+CONFIG_NSH_BUILTIN_APPS=y
+CONFIG_NSH_FILEIOSIZE=512
+CONFIG_NSH_LINELEN=64
+CONFIG_NSH_READLINE=y
+CONFIG_PREALLOC_TIMERS=4
+CONFIG_RAM_SIZE=262144
+CONFIG_RAM_START=0x20000000
+CONFIG_RAW_BINARY=y
+CONFIG_RR_INTERVAL=200
+CONFIG_SCHED_WAITPID=y
+CONFIG_START_DAY=26
+CONFIG_START_MONTH=3
+CONFIG_SYMTAB_ORDEREDBYNAME=y
+CONFIG_SYSTEM_NSH=y
+CONFIG_TASK_NAME_SIZE=0
+CONFIG_TESTING_OSTEST=y
+CONFIG_TIMER=y
+CONFIG_UART0_SERIAL_CONSOLE=y
+CONFIG_USEC_PER_TICK=10000
diff --git a/boards/arm/nrf91/nrf9160-dk/include/board.h 
b/boards/arm/nrf91/nrf9160-dk/include/board.h
new file mode 100644
index 0000000000..fcd76867a4
--- /dev/null
+++ b/boards/arm/nrf91/nrf9160-dk/include/board.h
@@ -0,0 +1,106 @@
+/****************************************************************************
+ * boards/arm/nrf91/nrf9160-dk/include/board.h
+ *
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.  The
+ * ASF licenses this file to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance with the
+ * License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
+ * License for the specific language governing permissions and limitations
+ * under the License.
+ *
+ ****************************************************************************/
+
+#ifndef __BOARDS_ARM_NRF91_NRF9160_DK_INCLUDE_BOARD_H
+#define __BOARDS_ARM_NRF91_NRF9160_DK_INCLUDE_BOARD_H
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+#include <stdbool.h>
+
+#if defined(CONFIG_ARCH_IRQBUTTONS) && defined(CONFIG_NRF91_GPIOTE)
+#  include <nuttx/irq.h>
+#endif
+
+/****************************************************************************
+ * Pre-processor Definitions
+ ****************************************************************************/
+
+/* Clocking *****************************************************************/
+
+#define BOARD_SYSTICK_CLOCK         (64000000)
+
+/* LED definitions **********************************************************/
+
+/* A low output illuminates the LED.
+ *
+ * LED index values for use with board_userled()
+ */
+
+#define BOARD_LED1        0
+#define BOARD_LED2        1
+#define BOARD_LED3        2
+#define BOARD_LED4        3
+#define BOARD_NLEDS       4
+
+/* LED bits for use with board_userled_all() */
+
+#define BOARD_LED1_BIT    (1 << BOARD_LED1)
+#define BOARD_LED2_BIT    (1 << BOARD_LED2)
+#define BOARD_LED3_BIT    (1 << BOARD_LED3)
+#define BOARD_LED4_BIT    (1 << BOARD_LED4)
+
+/* If CONFIG_ARCH_LEDS is defined, the LED will be controlled as follows
+ * for NuttX debug functionality (where NC means "No Change").
+ */
+
+#define LED_STARTED                0  /* OFF      */
+#define LED_HEAPALLOCATE           0  /* OFF      */
+#define LED_IRQSENABLED            0  /* OFF      */
+#define LED_STACKCREATED           1  /* ON       */
+#define LED_INIRQ                  2  /* NC       */
+#define LED_SIGNAL                 2  /* NC       */
+#define LED_ASSERTION              2  /* NC       */
+#define LED_PANIC                  3  /* Flashing */
+
+/* If CONFIG_ARCH_LEDS is not defined, then the LEDs are completely under
+ * control of the application.  The following interfaces are then available
+ * for application control of the LEDs:
+ *
+ *  uint32_t board_userled_initialize(void);
+ *  void board_userled(int led, bool ledon);
+ *  void board_userled_all(uint32_t ledset);
+ */
+
+/* Button definitions *******************************************************/
+
+/* Board supports 2 buttons. */
+
+#define BUTTON_BTN1       0
+#define BUTTON_BTN2       1
+#define NUM_BUTTONS       2
+
+#define BUTTON_BTN1_BIT  (1 << BUTTON_BTN1)
+#define BUTTON_BTN2_BIT  (1 << BUTTON_BTN2)
+
+/* UART Pins ****************************************************************/
+
+/* UART0 is connected to the virtual COM port:
+ *   UART0_RX - P0-28
+ *   UART0_TX - P0-29
+ */
+
+#define BOARD_UART0_RX_PIN  (GPIO_INPUT  | GPIO_PORT0 | GPIO_PIN(28))
+#define BOARD_UART0_TX_PIN  (GPIO_OUTPUT | GPIO_VALUE_ONE | GPIO_PORT0 | 
GPIO_PIN(29))
+
+#endif /* __BOARDS_ARM_NRF91_NRF9160_DK_INCLUDE_BOARD_H */
diff --git a/boards/arm/nrf91/nrf9160-dk/scripts/Make.defs 
b/boards/arm/nrf91/nrf9160-dk/scripts/Make.defs
new file mode 100644
index 0000000000..28fd4640d1
--- /dev/null
+++ b/boards/arm/nrf91/nrf9160-dk/scripts/Make.defs
@@ -0,0 +1,38 @@
+############################################################################
+# boards/arm/nrf91/nrf9160-dk/scripts/Make.defs
+#
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.  The
+# ASF licenses this file to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance with the
+# License.  You may obtain a copy of the License at
+#
+#   http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
+# License for the specific language governing permissions and limitations
+# under the License.
+#
+############################################################################
+
+include $(TOPDIR)/.config
+include $(TOPDIR)/tools/Config.mk
+include $(TOPDIR)/arch/arm/src/armv8-m/Toolchain.defs
+
+ARCHSCRIPT += $(BOARD_DIR)$(DELIM)scripts$(DELIM)flash_app.ld
+
+ARCHPICFLAGS = -fpic -msingle-pic-base -mpic-register=r10
+
+CFLAGS := $(ARCHCFLAGS) $(ARCHOPTIMIZATION) $(ARCHCPUFLAGS) $(ARCHINCLUDES) 
$(ARCHDEFINES) $(EXTRAFLAGS) -pipe
+CPICFLAGS = $(ARCHPICFLAGS) $(CFLAGS)
+CXXFLAGS := $(ARCHCXXFLAGS) $(ARCHOPTIMIZATION) $(ARCHCPUFLAGS) 
$(ARCHXXINCLUDES) $(ARCHDEFINES) $(EXTRAFLAGS) -pipe
+CXXPICFLAGS = $(ARCHPICFLAGS) $(CXXFLAGS)
+CPPFLAGS := $(ARCHINCLUDES) $(ARCHDEFINES) $(EXTRAFLAGS)
+AFLAGS := $(CFLAGS) -D__ASSEMBLY__
+
+NXFLATLDFLAGS1 = -r -d -warn-common
+NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) 
-T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
+LDNXFLATFLAGS = -e main -s 2048
diff --git a/boards/arm/nrf91/nrf9160-dk/scripts/flash_app.ld 
b/boards/arm/nrf91/nrf9160-dk/scripts/flash_app.ld
new file mode 100644
index 0000000000..b5b3508a4a
--- /dev/null
+++ b/boards/arm/nrf91/nrf9160-dk/scripts/flash_app.ld
@@ -0,0 +1,116 @@
+/****************************************************************************
+ * boards/arm/nrf91/nrf9160-dk/scripts/flash_app.ld
+ *
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.  The
+ * ASF licenses this file to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance with the
+ * License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
+ * License for the specific language governing permissions and limitations
+ * under the License.
+ *
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+
+#ifdef CONFIG_NRF91_MODEM_SHMEM_SIZE
+#  define NRF91_SHMEM_SIZE (CONFIG_NRF91_MODEM_SHMEM_SIZE)
+#else
+#  define NRF91_SHMEM_SIZE (0)
+#endif
+
+MEMORY
+{
+    progmem (rx)  : ORIGIN = 0x00000000,
+                    LENGTH = 1024K
+    datamem (rwx) : ORIGIN = 0x20000000 + NRF91_SHMEM_SIZE,
+                    LENGTH = 256K - NRF91_SHMEM_SIZE
+}
+
+OUTPUT_ARCH(arm)
+ENTRY(__start)         /* Treat __start as the anchor for dead code stripping 
*/
+EXTERN(_vectors)       /* Force the vectors to be included in the output */
+SECTIONS
+{
+    .text :
+    {
+        _stext = ABSOLUTE(.);
+        *(.vectors)
+        *(.text .text.*)
+        *(.fixup)
+        *(.gnu.warning)
+        *(.rodata .rodata.*)
+        *(.gnu.linkonce.t.*)
+        *(.glue_7)
+        *(.glue_7t)
+        *(.got)
+        *(.gcc_except_table)
+        *(.gnu.linkonce.r.*)
+        _etext = ABSOLUTE(.);
+    } > progmem
+
+    .init_section :
+    {
+        _sinit = ABSOLUTE(.);
+        *(.init_array .init_array.*)
+        _einit = ABSOLUTE(.);
+    } > progmem
+
+    .ARM.extab :
+    {
+        *(.ARM.extab*)
+    } > progmem
+
+    __exidx_start = ABSOLUTE(.);
+    .ARM.exidx :
+    {
+        *(.ARM.exidx*)
+    } > progmem
+    __exidx_end = ABSOLUTE(.);
+
+    _eronly = ABSOLUTE(.);
+
+    .data :
+    {
+        _sdata = ABSOLUTE(.);
+        *(.data .data.*)
+        *(.gnu.linkonce.d.*)
+        CONSTRUCTORS
+        . = ALIGN(4);
+        _edata = ABSOLUTE(.);
+    } > datamem AT > progmem
+
+    /* BSS */
+
+    .bss :
+    {
+        _sbss = ABSOLUTE(.);
+        *(.bss .bss.*)
+        *(.gnu.linkonce.b.*)
+        *(COMMON)
+        . = ALIGN(4);
+        _ebss = ABSOLUTE(.);
+    } > datamem
+
+    /* Stabs debugging sections. */
+
+    .stab 0 : { *(.stab) }
+    .stabstr 0 : { *(.stabstr) }
+    .stab.excl 0 : { *(.stab.excl) }
+    .stab.exclstr 0 : { *(.stab.exclstr) }
+    .stab.index 0 : { *(.stab.index) }
+    .stab.indexstr 0 : { *(.stab.indexstr) }
+    .comment 0 : { *(.comment) }
+    .debug_abbrev 0 : { *(.debug_abbrev) }
+    .debug_info 0 : { *(.debug_info) }
+    .debug_line 0 : { *(.debug_line) }
+    .debug_pubnames 0 : { *(.debug_pubnames) }
+    .debug_aranges 0 : { *(.debug_aranges) }
+}
diff --git a/boards/arm/nrf91/nrf9160-dk/src/Make.defs 
b/boards/arm/nrf91/nrf9160-dk/src/Make.defs
new file mode 100644
index 0000000000..d9c8b7b122
--- /dev/null
+++ b/boards/arm/nrf91/nrf9160-dk/src/Make.defs
@@ -0,0 +1,41 @@
+############################################################################
+# boards/arm/nrf91/nrf9160-dk/src/Make.defs
+#
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.  The
+# ASF licenses this file to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance with the
+# License.  You may obtain a copy of the License at
+#
+#  http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
+# License for the specific language governing permissions and limitations
+# under the License.
+#
+############################################################################
+
+include $(TOPDIR)/Make.defs
+
+CSRCS = nrf91_boot.c nrf91_bringup.c
+
+ifeq ($(CONFIG_BOARDCTL),y)
+CSRCS += nrf91_appinit.c
+endif
+
+ifeq ($(CONFIG_ARCH_LEDS),y)
+CSRCS += nrf91_autoleds.c
+else
+CSRCS += nrf91_userleds.c
+endif
+
+ifeq ($(CONFIG_ARCH_BUTTONS),y)
+CSRCS += nrf91_buttons.c
+endif
+
+DEPPATH += --dep-path board
+VPATH += :board
+CFLAGS += 
${INCDIR_PREFIX}$(TOPDIR)$(DELIM)arch$(DELIM)$(CONFIG_ARCH)$(DELIM)src$(DELIM)board$(DELIM)board
diff --git a/boards/arm/nrf91/nrf9160-dk/src/nrf9160-dk.h 
b/boards/arm/nrf91/nrf9160-dk/src/nrf9160-dk.h
new file mode 100644
index 0000000000..7eef7823cb
--- /dev/null
+++ b/boards/arm/nrf91/nrf9160-dk/src/nrf9160-dk.h
@@ -0,0 +1,96 @@
+/****************************************************************************
+ * boards/arm/nrf91/nrf9160-dk/src/nrf9160-dk.h
+ *
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.  The
+ * ASF licenses this file to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance with the
+ * License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
+ * License for the specific language governing permissions and limitations
+ * under the License.
+ *
+ ****************************************************************************/
+
+#ifndef __BOARDS_ARM_NRF91_NRF9160_DK_SRC_NRF9160_DK_H
+#define __BOARDS_ARM_NRF91_NRF9160_DK_SRC_NRF9160_DK_H
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+#include <nuttx/compiler.h>
+
+#include "nrf91_gpio.h"
+
+/****************************************************************************
+ * Pre-processor Definitions
+ ****************************************************************************/
+
+/* Configuration ************************************************************/
+
+/* procfs File System */
+
+#ifdef CONFIG_FS_PROCFS
+#  ifdef CONFIG_NSH_PROC_MOUNTPOINT
+#    define NRF91_PROCFS_MOUNTPOINT CONFIG_NSH_PROC_MOUNTPOINT
+#  else
+#    define NRF91_PROCFS_MOUNTPOINT "/proc"
+#  endif
+#endif
+
+/* LED definitions **********************************************************/
+
+/* Definitions to configure LED GPIO as outputs */
+
+#define GPIO_LED1  (GPIO_OUTPUT | GPIO_VALUE_ONE | GPIO_PORT0 | GPIO_PIN(2))
+#define GPIO_LED2  (GPIO_OUTPUT | GPIO_VALUE_ONE | GPIO_PORT0 | GPIO_PIN(3))
+#define GPIO_LED3  (GPIO_OUTPUT | GPIO_VALUE_ONE | GPIO_PORT0 | GPIO_PIN(4))
+#define GPIO_LED4  (GPIO_OUTPUT | GPIO_VALUE_ONE | GPIO_PORT0 | GPIO_PIN(5))
+
+/* Button definitions *******************************************************/
+
+/* Board supports four buttons. */
+
+#define GPIO_BUTTON1 (GPIO_INPUT | GPIO_PULLUP | GPIO_PORT0 | GPIO_PIN(6))
+#define GPIO_BUTTON2 (GPIO_INPUT | GPIO_PULLUP | GPIO_PORT0 | GPIO_PIN(7))
+
+/****************************************************************************
+ * Public Types
+ ****************************************************************************/
+
+/****************************************************************************
+ * Public Data
+ ****************************************************************************/
+
+#ifndef __ASSEMBLY__
+
+/****************************************************************************
+ * Public Functions Prototypes
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: nrf91_bringup
+ *
+ * Description:
+ *   Perform architecture-specific initialization
+ *
+ *   CONFIG_BOARD_LATE_INITIALIZE=y :
+ *     Called from board_late_initialize().
+ *
+ *   CONFIG_BOARD_LATE_INITIALIZE=n && CONFIG_BOARDCTL=y :
+ *     Called from the NSH library
+ *
+ ****************************************************************************/
+
+int nrf91_bringup(void);
+
+#endif /* __ASSEMBLY__ */
+#endif /* __BOARDS_ARM_NRF91_NRF9160_DK_SRC_NRF9160_DK_H */
diff --git a/boards/arm/nrf91/nrf9160-dk/src/nrf91_appinit.c 
b/boards/arm/nrf91/nrf9160-dk/src/nrf91_appinit.c
new file mode 100644
index 0000000000..8af4cd2b61
--- /dev/null
+++ b/boards/arm/nrf91/nrf9160-dk/src/nrf91_appinit.c
@@ -0,0 +1,88 @@
+/****************************************************************************
+ * boards/arm/nrf91/nrf9160-dk/src/nrf91_appinit.c
+ *
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.  The
+ * ASF licenses this file to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance with the
+ * License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
+ * License for the specific language governing permissions and limitations
+ * under the License.
+ *
+ ****************************************************************************/
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+
+#include <stdio.h>
+#include <debug.h>
+#include <errno.h>
+
+#include <nuttx/board.h>
+
+#include "chip.h"
+#include "nrf9160-dk.h"
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: arm_netinitialize
+ *
+ * Description:
+ *   Dummy function expected to start-up logic.
+ *
+ ****************************************************************************/
+
+#if defined(CONFIG_NET) && !defined(CONFIG_NETDEV_LATEINIT)
+void arm_netinitialize(void)
+{
+}
+#endif
+
+/****************************************************************************
+ * Name: board_app_initialize
+ *
+ * Description:
+ *   Perform architecture specific initialization
+ *
+ * Input Parameters:
+ *   arg - The boardctl() argument is passed to the board_app_initialize()
+ *         implementation without modification.  The argument has no
+ *         meaning to NuttX; the meaning of the argument is a contract
+ *         between the board-specific initialization logic and the
+ *         matching application logic.  The value could be such things as a
+ *         mode enumeration value, a set of DIP switch switch settings, a
+ *         pointer to configuration data read from a file or serial FLASH,
+ *         or whatever you would like to do with it.  Every implementation
+ *         should accept zero/NULL as a default configuration.
+ *
+ * Returned Value:
+ *   Zero (OK) is returned on success; a negated errno value is returned on
+ *   any failure to indicate the nature of the failure.
+ *
+ ****************************************************************************/
+
+int board_app_initialize(uintptr_t arg)
+{
+#ifdef CONFIG_BOARD_LATE_INITIALIZE
+  /* Board initialization already performed by board_late_initialize() */
+
+  return OK;
+#else
+  /* Perform board-specific initialization */
+
+  return nrf91_bringup();
+#endif
+}
diff --git a/boards/arm/nrf91/nrf9160-dk/src/nrf91_autoleds.c 
b/boards/arm/nrf91/nrf9160-dk/src/nrf91_autoleds.c
new file mode 100644
index 0000000000..9ff57acb13
--- /dev/null
+++ b/boards/arm/nrf91/nrf9160-dk/src/nrf91_autoleds.c
@@ -0,0 +1,127 @@
+/****************************************************************************
+ * boards/arm/nrf91/nrf9160-dk/src/nrf91_autoleds.c
+ *
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.  The
+ * ASF licenses this file to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance with the
+ * License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
+ * License for the specific language governing permissions and limitations
+ * under the License.
+ *
+ ****************************************************************************/
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+
+#include <stdint.h>
+#include <stdbool.h>
+#include <debug.h>
+
+#include <nuttx/board.h>
+#include <arch/board/board.h>
+
+#include "chip.h"
+#include "arm_internal.h"
+#include "nrf9160-dk.h"
+
+#ifdef CONFIG_ARCH_LEDS
+
+#define LED_ON 0
+#define LED_OFF 1
+
+/* This array maps an LED number to GPIO pin configuration */
+
+static const uint32_t g_ledcfg[BOARD_NLEDS] =
+{
+#if 0 < BOARD_NLEDS
+  GPIO_LED1,
+#endif
+#if 1 < BOARD_NLEDS
+  GPIO_LED2,
+#endif
+#if 2 < BOARD_NLEDS
+  GPIO_LED3,
+#endif
+#if 3 < BOARD_NLEDS
+  GPIO_LED4,
+#endif
+};
+
+/****************************************************************************
+ * Private Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: led_dumppins
+ ****************************************************************************/
+
+#ifdef LED_VERBOSE
+static void led_dumppins(const char *msg)
+{
+  nrf91_pin_dump(PINCONFIG_LED, msg);
+  nrf91_gpio_dump(GPIO_LED, msg);
+}
+#else
+#  define led_dumppins(m)
+#endif
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: board_autoled_initialize
+ ****************************************************************************/
+
+void board_autoled_initialize(void)
+{
+  int i;
+
+  /* Configure LED pin as a GPIO outputs */
+
+  led_dumppins("board_autoled_initialize() Entry)");
+
+  for (i = 0; i < BOARD_NLEDS; i++)
+    {
+      nrf91_gpio_config(g_ledcfg[i]);
+    }
+
+  led_dumppins("board_autoled_initialize() Exit");
+}
+
+/****************************************************************************
+ * Name: board_autoled_on
+ ****************************************************************************/
+
+void board_autoled_on(int led)
+{
+  if ((unsigned)led < BOARD_NLEDS)
+    {
+      nrf91_gpio_write(g_ledcfg[led], LED_ON);
+    }
+}
+
+/****************************************************************************
+ * Name: board_autoled_off
+ ****************************************************************************/
+
+void board_autoled_off(int led)
+{
+  if ((unsigned)led < BOARD_NLEDS)
+    {
+      nrf91_gpio_write(g_ledcfg[led], LED_OFF);
+    }
+}
+
+#endif /* CONFIG_ARCH_LEDS */
diff --git a/boards/arm/nrf91/nrf9160-dk/src/nrf91_boot.c 
b/boards/arm/nrf91/nrf9160-dk/src/nrf91_boot.c
new file mode 100644
index 0000000000..822fa11dad
--- /dev/null
+++ b/boards/arm/nrf91/nrf9160-dk/src/nrf91_boot.c
@@ -0,0 +1,79 @@
+/****************************************************************************
+ * boards/arm/nrf91/nrf9160-dk/src/nrf91_boot.c
+ *
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.  The
+ * ASF licenses this file to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance with the
+ * License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
+ * License for the specific language governing permissions and limitations
+ * under the License.
+ *
+ ****************************************************************************/
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+
+#include <debug.h>
+
+#include <nuttx/board.h>
+#include <arch/board/board.h>
+
+#include "arm_internal.h"
+#include "nrf9160-dk.h"
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: nrf91_board_initialize
+ *
+ * Description:
+ *   All NRF91xxx architectures must provide the following entry point.
+ *   This entry point is called early in the initialization -- after all
+ *   memory has been configured and mapped but before any devices have been
+ *   initialized.
+ *
+ ****************************************************************************/
+
+void nrf91_board_initialize(void)
+{
+  /* Configure on-board LEDs if LED support has been selected. */
+
+#ifdef CONFIG_ARCH_LEDS
+  board_autoled_initialize();
+#endif
+}
+
+/****************************************************************************
+ * Name: board_late_initialize
+ *
+ * Description:
+ *   If CONFIG_BOARD_LATE_INITIALIZE is selected, then an additional
+ *   initialization call will be performed in the boot-up sequence to a
+ *   function called board_late_initialize(). board_late_initialize() will be
+ *   called immediately after up_initialize() is called and just before the
+ *   initial application is started.  This additional initialization phase
+ *   may be used, for example, to initialize board-specific device drivers.
+ *
+ ****************************************************************************/
+
+#ifdef CONFIG_BOARD_LATE_INITIALIZE
+void board_late_initialize(void)
+{
+  /* Perform board-specific initialization */
+
+  nrf91_bringup();
+}
+#endif
diff --git a/boards/arm/nrf91/nrf9160-dk/src/nrf91_bringup.c 
b/boards/arm/nrf91/nrf9160-dk/src/nrf91_bringup.c
new file mode 100644
index 0000000000..b8ddd51684
--- /dev/null
+++ b/boards/arm/nrf91/nrf9160-dk/src/nrf91_bringup.c
@@ -0,0 +1,136 @@
+/****************************************************************************
+ * boards/arm/nrf91/nrf9160-dk/src/nrf91_bringup.c
+ *
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.  The
+ * ASF licenses this file to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance with the
+ * License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
+ * License for the specific language governing permissions and limitations
+ * under the License.
+ *
+ ****************************************************************************/
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+
+#include <errno.h>
+#include <sys/types.h>
+#include <syslog.h>
+
+#include <nuttx/fs/fs.h>
+
+#ifdef CONFIG_USERLED
+#  include <nuttx/leds/userled.h>
+#endif
+
+#ifdef CONFIG_INPUT_BUTTONS
+#  include <nuttx/input/buttons.h>
+#endif
+
+#ifdef CONFIG_NRF91_MODEM
+#  include "nrf91_modem.h"
+#endif
+
+#ifdef CONFIG_NRF91_MODEM_AT
+#  include "nrf91_modem_at.h"
+#endif
+
+#include "nrf9160-dk.h"
+
+/****************************************************************************
+ * Pre-processor Definitions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: nrf91_bringup
+ *
+ * Description:
+ *   Perform architecture-specific initialization
+ *
+ *   CONFIG_BOARD_LATE_INITIALIZE=y :
+ *     Called from board_late_initialize().
+ *
+ *   CONFIG_BOARD_LATE_INITIALIZE=n && CONFIG_BOARDCTL=y :
+ *     Called from the NSH library
+ *
+ ****************************************************************************/
+
+int nrf91_bringup(void)
+{
+  int ret;
+
+#ifdef CONFIG_FS_PROCFS
+  /* Mount the procfs file system */
+
+  ret = nx_mount(NULL, NRF91_PROCFS_MOUNTPOINT, "procfs", 0, NULL);
+  if (ret < 0)
+    {
+      syslog(LOG_ERR,
+             "ERROR: Failed to mount the PROC filesystem: %d\n",  ret);
+    }
+#endif /* CONFIG_FS_PROCFS */
+
+#ifdef CONFIG_USERLED
+  /* Register the LED driver */
+
+  ret = userled_lower_initialize(CONFIG_EXAMPLES_LEDS_DEVPATH);
+  if (ret < 0)
+    {
+      syslog(LOG_ERR, "ERROR: userled_lower_initialize() failed: %d\n", ret);
+    }
+#endif
+
+#ifdef CONFIG_INPUT_BUTTONS
+  /* Register the BUTTON driver */
+
+  ret = btn_lower_initialize("/dev/buttons");
+  if (ret < 0)
+    {
+      syslog(LOG_ERR, "ERROR: btn_lower_initialize() failed: %d\n", ret);
+    }
+#endif
+
+#ifdef CONFIG_NRF91_MODEM
+  /* Initialize modem */
+
+  ret = nrf91_modem_initialize();
+  if (ret < 0)
+    {
+      syslog(LOG_ERR,
+             "ERROR: Failed to initialize modem%d\n",  ret);
+    }
+#endif
+
+#ifdef CONFIG_NRF91_MODEM_AT
+  /* Initialize modem AT interface */
+
+  ret = nrf91_at_register("/dev/modem");
+  if (ret < 0)
+    {
+      syslog(LOG_ERR,
+             "ERROR: Failed to initialize AT interface%d\n",  ret);
+    }
+#endif
+
+  UNUSED(ret);
+  return OK;
+}
diff --git a/boards/arm/nrf91/nrf9160-dk/src/nrf91_buttons.c 
b/boards/arm/nrf91/nrf9160-dk/src/nrf91_buttons.c
new file mode 100644
index 0000000000..f923a06874
--- /dev/null
+++ b/boards/arm/nrf91/nrf9160-dk/src/nrf91_buttons.c
@@ -0,0 +1,151 @@
+/****************************************************************************
+ * boards/arm/nrf91/nrf9160-dk/src/nrf91_buttons.c
+ *
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.  The
+ * ASF licenses this file to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance with the
+ * License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
+ * License for the specific language governing permissions and limitations
+ * under the License.
+ *
+ ****************************************************************************/
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+
+#include <debug.h>
+#include <errno.h>
+#include <stdint.h>
+
+#include <nuttx/arch.h>
+#include <nuttx/board.h>
+#include <arch/board/board.h>
+
+#include "nrf91_gpio.h"
+#include "nrf91_gpiote.h"
+
+#include "nrf9160-dk.h"
+
+#ifdef CONFIG_ARCH_BUTTONS
+
+/****************************************************************************
+ * Private Data
+ ****************************************************************************/
+
+/* Pin configuration for each nrf9160 button.  This array is indexed by
+ * the BUTTON_* definitions in board.h
+ */
+
+static const uint32_t g_buttons[NUM_BUTTONS] =
+{
+  GPIO_BUTTON1,
+  GPIO_BUTTON2
+};
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: board_button_initialize
+ *
+ * Description:
+ *   board_button_initialize() must be called to initialize button resources.
+ *   After that, board_buttons() may be called to collect the current state
+ *   of all buttons or board_button_irq() may be called to register button
+ *   interrupt handlers.
+ *
+ ****************************************************************************/
+
+uint32_t board_button_initialize(void)
+{
+  int i;
+
+  /* Configure the GPIO pins as inputs. */
+
+  for (i = 0; i < NUM_BUTTONS; i++)
+    {
+      nrf91_gpio_config(g_buttons[i]);
+    }
+
+  return NUM_BUTTONS;
+}
+
+/****************************************************************************
+ * Name: board_buttons
+ ****************************************************************************/
+
+uint32_t board_buttons(void)
+{
+  uint32_t ret = 0;
+  int i;
+
+  /* Check that state of each key */
+
+  for (i = 0; i < NUM_BUTTONS; i++)
+    {
+      /* A LOW value means that the key is pressed. */
+
+      bool released = nrf91_gpio_read(g_buttons[BUTTON_BTN1]);
+
+      /* Accumulate the set of depressed (not released) keys */
+
+      if (!released)
+        {
+          ret |= (1 << i);
+        }
+    }
+
+  return ret;
+}
+
+/****************************************************************************
+ * Button support.
+ *
+ * Description:
+ *   board_button_initialize() must be called to initialize button resources.
+ *   After that, board_buttons() may be called to collect the current state
+ *   of all buttons or board_button_irq() may be called to register button
+ *   interrupt handlers.
+ *
+ *   After board_button_initialize() has been called, board_buttons() may be
+ *   called to collect the state of all buttons.  board_buttons() returns an
+ *   32-bit bit set with each bit associated with a button.  See the
+ *   BUTTON_*_BIT definitions in board.h for the meaning of each bit.
+ *
+ *   board_button_irq() may be called to register an interrupt handler that
+ *   will be called when a button is depressed or released.  The ID value is
+ *   a button enumeration value that uniquely identifies a button resource.
+ *   See the BUTTON_* definitions in board.h for the meaning of enumeration
+ *   value.
+ *
+ ****************************************************************************/
+
+#ifdef CONFIG_ARCH_IRQBUTTONS
+int board_button_irq(int id, xcpt_t irqhandler, void *arg)
+{
+  int ret = OK;
+
+  ret = nrf91_gpiote_set_event(g_buttons[id], true, true, irqhandler, arg);
+  if (ret < 0)
+    {
+      ierr("ERROR: nrf91_gpiote_set_event\n");
+      return ret;
+    }
+
+  return OK;
+}
+#endif
+
+#endif /* CONFIG_ARCH_BUTTONS */
diff --git a/boards/arm/nrf91/nrf9160-dk/src/nrf91_userleds.c 
b/boards/arm/nrf91/nrf9160-dk/src/nrf91_userleds.c
new file mode 100644
index 0000000000..28051873f3
--- /dev/null
+++ b/boards/arm/nrf91/nrf9160-dk/src/nrf91_userleds.c
@@ -0,0 +1,148 @@
+/****************************************************************************
+ * boards/arm/nrf91/nrf9160-dk/src/nrf91_userleds.c
+ *
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.  The
+ * ASF licenses this file to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance with the
+ * License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
+ * License for the specific language governing permissions and limitations
+ * under the License.
+ *
+ ****************************************************************************/
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+
+#include <stdint.h>
+#include <stdbool.h>
+#include <debug.h>
+
+#include <arch/board/board.h>
+
+#include "chip.h"
+#include "arm_internal.h"
+#include "nrf9160-dk.h"
+
+#ifndef CONFIG_ARCH_LEDS
+
+/****************************************************************************
+ * Pre-processor Definitions
+ ****************************************************************************/
+
+/* LED definitions **********************************************************/
+
+/* If CONFIG_ARCH_LEDS is not defined, then the LEDs are completely under
+ * control of the application.  The following interfaces are then available
+ * for application control of the LEDs:
+ *
+ *  uint32_t board_userled_initialize(void);
+ *  void board_userled(int led, bool ledon);
+ *  void board_userled_all(uint32_t ledset);
+ */
+
+#define LED_ON 0
+#define LED_OFF 1
+
+/* This array maps an LED number to GPIO pin configuration */
+
+static const uint32_t g_ledcfg[BOARD_NLEDS] =
+{
+#if 0 < BOARD_NLEDS
+  GPIO_LED1,
+#endif
+#if 1 < BOARD_NLEDS
+  GPIO_LED2,
+#endif
+#if 2 < BOARD_NLEDS
+  GPIO_LED3,
+#endif
+#if 3 < BOARD_NLEDS
+  GPIO_LED4,
+#endif
+};
+
+/****************************************************************************
+ * Private Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: led_dumppins
+ ****************************************************************************/
+
+#ifdef LED_VERBOSE
+static void led_dumppins(const char *msg)
+{
+  nrf91_pin_dump(PINCONFIG_LED, msg);
+  nrf91_gpio_dump(GPIO_LED, msg);
+}
+#else
+#  define led_dumppins(m)
+#endif
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: board_userled_initialize
+ ****************************************************************************/
+
+uint32_t board_userled_initialize(void)
+{
+  int i;
+
+  /* Configure LED pin as a GPIO outputs */
+
+  led_dumppins("board_userled_initialize() Entry)");
+
+  /* Configure GPIO as an outputs */
+
+  for (i = 0; i < BOARD_NLEDS; i++)
+    {
+      nrf91_gpio_config(g_ledcfg[i]);
+    }
+
+  led_dumppins("board_userled_initialize() Exit");
+  return BOARD_NLEDS;
+}
+
+/****************************************************************************
+ * Name: board_userled
+ ****************************************************************************/
+
+void board_userled(int led, bool ledon)
+{
+  if ((unsigned)led < BOARD_NLEDS)
+    {
+      nrf91_gpio_write(g_ledcfg[led], ledon ? LED_ON : LED_OFF);
+    }
+}
+
+/****************************************************************************
+ * Name: board_userled_all
+ ****************************************************************************/
+
+void board_userled_all(uint32_t ledset)
+{
+  int i;
+
+  /* Configure LED1-8 GPIOs for output */
+
+  for (i = 0; i < BOARD_NLEDS; i++)
+    {
+      nrf91_gpio_write(g_ledcfg[i], (ledset & (1 << i)) ? LED_ON : LED_OFF);
+    }
+}
+
+#endif /* !CONFIG_ARCH_LEDS */

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