diff --git a/arch/arm/src/cxd56xx/Make.defs b/arch/arm/src/cxd56xx/Make.defs
index c4c7abd24c..c4f1503cbc 100644
--- a/arch/arm/src/cxd56xx/Make.defs
+++ b/arch/arm/src/cxd56xx/Make.defs
@@ -92,6 +92,7 @@ CHIP_CSRCS += cxd56_start.c
 CHIP_CSRCS += cxd56_timerisr.c
 CHIP_CSRCS += cxd56_pinconfig.c
 CHIP_CSRCS += cxd56_clock.c
+CHIP_CSRCS += cxd56_delay.c
 CHIP_CSRCS += cxd56_gpio.c
 CHIP_CSRCS += cxd56_pmic.c
 CHIP_CSRCS += cxd56_cpufifo.c
diff --git a/arch/arm/src/cxd56xx/cxd56_delay.c b/arch/arm/src/cxd56xx/cxd56_delay.c
new file mode 100644
index 0000000000..f54f7eabca
--- /dev/null
+++ b/arch/arm/src/cxd56xx/cxd56_delay.c
@@ -0,0 +1,119 @@
+/****************************************************************************
+ * arch/arm/src/cxd56xx/cxd56_delay.c
+ *
+ *   Copyright 2018 Sony Semiconductor Solutions Corporation
+ *
+ * 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 Sony Semiconductor Solutions Corporation 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 OWNER 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.
+ *
+ ****************************************************************************/
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+#include <sys/types.h>
+#include <nuttx/arch.h>
+
+#include <stdint.h>
+
+#include "cxd56_clock.h"
+
+/****************************************************************************
+ * Pre-processor Definitions
+ ****************************************************************************/
+
+#define CXD56XX_LOOPSPERMSEC_156MHZ 7428ull
+#define CXD56XX_LOOPSPERMSEC_BY_CLOCK(clock) \
+  (uint32_t)(CXD56XX_LOOPSPERMSEC_156MHZ * (clock) / 156000000ull)
+
+/* Adjust manually to be up_udelay(1000) is neary equal with up_udelay(999) */
+
+#define CXD56XX_LOOPSPERUSEC_ADJUST 810ul;
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: up_mdelay
+ *
+ * Description:
+ *   Delay inline for the requested number of milliseconds.
+ *   *** NOT multi-tasking friendly ***
+ *
+ ****************************************************************************/
+
+void up_mdelay(unsigned int milliseconds)
+{
+  volatile unsigned int i;
+  volatile unsigned int j;
+  uint32_t clock = cxd56_get_cpu_baseclk();
+  uint32_t loops = CXD56XX_LOOPSPERMSEC_BY_CLOCK(clock);
+
+  for (i = 0; i < milliseconds; i++)
+    {
+      for (j = 0; j < loops; j++)
+        {
+        }
+    }
+}
+
+/****************************************************************************
+ * Name: up_udelay
+ *
+ * Description:
+ *   Delay inline for the requested number of microseconds.  NOTE:  Because
+ *   of all of the setup, several microseconds will be lost before the actual
+ *   timing looop begins.  Thus, the delay will always be a few microseconds
+ *   longer than requested.
+ *
+ *   *** NOT multi-tasking friendly ***
+ *
+ ****************************************************************************/
+
+void up_udelay(useconds_t microseconds)
+{
+  volatile unsigned int i;
+  volatile unsigned int j;
+  uint32_t clock = cxd56_get_cpu_baseclk();
+  uint32_t loops = CXD56XX_LOOPSPERMSEC_BY_CLOCK(clock);
+  uint32_t milliseconds = microseconds / 1000;
+
+  for (i = 0; i < milliseconds; i++)
+    {
+      for (j = 0; j < loops; j++)
+        {
+        }
+    }
+  loops = loops * (microseconds % 1000) / CXD56XX_LOOPSPERUSEC_ADJUST;
+  for (i = 0; i < loops; i++)
+    {
+    }
+}
diff --git a/configs/spresense/include/board.h b/configs/spresense/include/board.h
index e701cb0dc3..5f39441520 100644
--- a/configs/spresense/include/board.h
+++ b/configs/spresense/include/board.h
@@ -49,9 +49,11 @@
 #include "cxd56_power.h"
 #include "cxd56_flash.h"
 #include "cxd56_gs2200m.h"
+#include "cxd56_i2cdev.h"
 #include "cxd56_bmi160.h"
 #include "cxd56_sdcard.h"
 #include "cxd56_wdt.h"
+#include "cxd56_gpioif.h"
 
 /****************************************************************************
  * Pre-processor Definitions
diff --git a/configs/spresense/include/cxd56_gpioif.h b/configs/spresense/include/cxd56_gpioif.h
new file mode 100644
index 0000000000..831c8f9b53
--- /dev/null
+++ b/configs/spresense/include/cxd56_gpioif.h
@@ -0,0 +1,202 @@
+/****************************************************************************
+ * configs/spresense/include/cxd56_gpioif.h
+ *
+ *   Copyright 2018 Sony Semiconductor Solutions Corporation
+ *
+ * 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 Sony Semiconductor Solutions Corporation 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 OWNER 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.
+ *
+ ****************************************************************************/
+
+#ifndef __BOARD_COMMON_INCLUDE_CXD56_GPIOIF_H
+#define __BOARD_COMMON_INCLUDE_CXD56_GPIOIF_H
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+
+#include <stdint.h>
+#include <stdbool.h>
+
+#include <nuttx/irq.h>
+
+#undef EXTERN
+#if defined(__cplusplus)
+#define EXTERN extern "C"
+extern "C"
+{
+#else
+#define EXTERN extern
+#endif
+
+/* gpioif GPIO Interface driver */
+
+/****************************************************************************
+ * Pre-processor Definitions
+ ****************************************************************************/
+
+/* Pin Pull Setting
+ * Pin floating, pull up, pull down definitions
+ */
+
+#define PIN_FLOAT               (0) /**< Floating */
+#define PIN_PULLUP              (1) /**< Internal Weak Pull Up */
+#define PIN_PULLDOWN            (2) /**< Internal Weak Pull Down */
+#define PIN_BUSKEEPER           (3) /**< Internal Bus-Keeper */
+
+/*
+ * GPIO Interrupt Setting
+ * GPIO interrupt level and edge trigger types
+ */
+
+#define INT_HIGH_LEVEL          (2) /**< High Level */
+#define INT_LOW_LEVEL           (3) /**< Low Level */
+#define INT_RISING_EDGE         (4) /**< Rising Edge */
+#define INT_FALLING_EDGE        (5) /**< Falling Edge */
+#define INT_BOTH_EDGE           (7) /**< Both Edge */
+
+#ifndef __ASSEMBLY__
+
+/****************************************************************************
+ * Public Function Prototypes
+ ****************************************************************************/
+
+/*
+ * GPIO Configure
+ *
+ * [in] pin: Pin number
+ * [in] mode: Function mode 0=GPIO
+ * [in] input: Input Enable true=enable, false=disable
+ * [in] drive: Drive Strength true=High Drive(4mA), false=Normal(2mA)
+ * [in] pull: 0=float, 1=pullup, 2=pulldown, 3=buskeeper
+ *          - PIN_FLOAT
+ *          - PIN_PULLUP
+ *          - PIN_PULLDOWN
+ *          - PIN_BUSKEEPER
+ *
+ *  return: OK(0) is success. negative value is failure.
+ */
+
+int board_gpio_config(uint32_t pin, int mode, bool input, bool drive,
+                      int pull);
+
+/*
+ * GPIO Status
+ *
+ * [in] pin: Pin number
+ * [out] input: Input Enable true=enable, false=disable
+ * [out] output: Output Enable true=enable, false=disable
+ * [out] drive: Drive Strength true=HighDrive(4mA), false=Normal(2mA)
+ * [out] pull: 0=float, 1=pullup, 2=pulldown, 3=buskeeper
+ *          - PIN_FLOAT
+ *          - PIN_PULLUP
+ *          - PIN_PULLDOWN
+ *          - PIN_BUSKEEPER
+ *
+ * return: Pin function mode. negative value is failure.
+ */
+
+int board_gpio_status(uint32_t pin, bool *input, bool *output, bool *drive,
+                      int *pull);
+
+/*
+ * GPIO Write
+ *
+ * [in] pin: Pin number
+ * [in] value: Write Value 0<high, 0=low, 0>hiz
+ */
+
+void board_gpio_write(uint32_t pin, int value);
+
+/*
+ * GPIO Read
+ *
+ * param: [in] pin: Pin number
+ *
+ * return:  read value 1=high, 0=low
+ */
+
+int board_gpio_read(uint32_t pin);
+
+/*
+ * GPIO Interrupt Configure
+ *
+ * [in] pin: Pin number
+ * [in] mode: Interrupt polarity
+ *          - #INT_HIGH_LEVEL
+ *          - #INT_LOW_LEVEL
+ *          - #INT_RISING_EDGE
+ *          - #INT_FALLING_EDGE
+ *          - #INT_BOTH_EDGE
+ * [in] filter: Noise Filter true=enable, false=disable
+ * [in] isr: Interrupt Service Routine
+ *
+ *  IRQ number. negative value is failure.
+ */
+
+int board_gpio_intconfig(uint32_t pin, int mode, bool filter, xcpt_t isr);
+
+/*
+ * GPIO Interrupt Configure
+ *
+ * [in] pin: Pin number
+ * [out] mode: Interrupt polarity
+ *          - #INT_HIGH_LEVEL
+ *          - #INT_LOW_LEVEL
+ *          - #INT_RISING_EDGE
+ *          - #INT_FALLING_EDGE
+ *          - #INT_BOTH_EDGE
+ * [out] filter: Noise Filter true=enable, false=disable
+ * [out] enabled: Interrupt true=enable, false=disable
+ *
+ *  IRQ number. negative value is failure.
+ */
+
+int board_gpio_intstatus(uint32_t pin, int *mode,
+                         bool *filter, bool *enabled);
+
+/*
+ * GPIO Interrupt Enable/Disable
+ *
+ * [in] pin: Pin number
+ * [in] enable: Interrupt true=enable, false=disable
+ *
+ *  IRQ number. negative value is failure.
+ */
+
+int board_gpio_int(uint32_t pin, bool enable);
+
+#undef EXTERN
+#if defined(__cplusplus)
+}
+#endif
+
+#endif /* __ASSEMBLY__ */
+#endif /* __BOARD_COMMON_INCLUDE_CXD56_GPIOIF_H */
diff --git a/configs/spresense/src/Makefile b/configs/spresense/src/Makefile
index 3d0836ee2a..1238611531 100644
--- a/configs/spresense/src/Makefile
+++ b/configs/spresense/src/Makefile
@@ -64,6 +64,10 @@ CSRCS += cxd56_userleds.c
 endif
 endif
 
+ifeq ($(CONFIG_CXD56_GPIO_IRQ),y)
+CSRCS += cxd56_gpioif.c
+endif
+
 ifeq ($(CONFIG_CXD56_PWM),y)
 CSRCS += cxd56_pwm.c
 endif
@@ -96,4 +100,8 @@ ifeq ($(CONFIG_SENSORS_BMI160_I2C),y)
 CSRCS += cxd56_bmi160_i2c.c
 endif
 
+ifeq ($(CONFIG_SYSTEM_I2CTOOL),y)
+CSRCS += cxd56_i2cdev.c
+endif
+
 include $(TOPDIR)/configs/Board.mk
diff --git a/configs/spresense/src/cxd56_bringup.c b/configs/spresense/src/cxd56_bringup.c
index 4700cff753..5683da5aa7 100644
--- a/configs/spresense/src/cxd56_bringup.c
+++ b/configs/spresense/src/cxd56_bringup.c
@@ -229,6 +229,32 @@ int cxd56_bringup(void)
     }
 #endif
 
+#ifdef CONFIG_SYSTEM_I2CTOOL
+  #ifdef CONFIG_CXD56_I2C0
+  ret = board_i2cdev_initialize(0);
+  if (ret < 0)
+    {
+      _err("ERROR: Failed to initialize I2C0.\n");
+    }
+  #endif
+
+  #ifdef CONFIG_CXD56_I2C1
+  ret = board_i2cdev_initialize(1);
+  if (ret < 0)
+    {
+      _err("ERROR: Failed to initialize I2C1.\n");
+    }
+  #endif
+
+  #ifdef CONFIG_CXD56_I2C2
+  ret = board_i2cdev_initialize(2);
+  if (ret < 0)
+    {
+      _err("ERROR: Failed to initialize I2C2.\n");
+    }
+  #endif
+#endif
+
   cxd56_uart_initialize();
   cxd56_timerisr_initialize();
 
diff --git a/configs/spresense/src/cxd56_gpioif.c b/configs/spresense/src/cxd56_gpioif.c
new file mode 100644
index 0000000000..170ed2225e
--- /dev/null
+++ b/configs/spresense/src/cxd56_gpioif.c
@@ -0,0 +1,285 @@
+/****************************************************************************
+ * configs/spresense/src/cxd56_gpioif.c
+ *
+ *   Copyright 2018 Sony Semiconductor Solutions Corporation
+ *
+ * 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 Sony Semiconductor Solutions Corporation 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 OWNER 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.
+ *
+ ****************************************************************************/
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+
+#include <stdio.h>
+#include <debug.h>
+#include <errno.h>
+
+#include <nuttx/board.h>
+#include <arch/board/board.h>
+
+#include "cxd56_pinconfig.h"
+#include "cxd56_gpio.h"
+#include "cxd56_gpioint.h"
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: board_gpio_config
+ ****************************************************************************/
+
+int board_gpio_config(uint32_t pin, int mode, bool input, bool drive,
+                      int pull)
+{
+  uint32_t pinconf;
+
+  pinconf = PINCONF_SET_PIN(pin);
+  pinconf |= (input) ? PINCONF_INPUT_ENABLE : PINCONF_INPUT_DISABLE;
+  pinconf |= (drive) ? PINCONF_DRIVE_HIGH : PINCONF_DRIVE_NORMAL;
+
+  switch (pull)
+    {
+      case PIN_PULLUP:
+        pinconf |= PINCONF_PULLUP;
+        break;
+      case PIN_PULLDOWN:
+        pinconf |= PINCONF_PULLDOWN;
+        break;
+      case PIN_BUSKEEPER:
+        pinconf |= PINCONF_BUSKEEPER;
+        break;
+      default:
+      case PIN_FLOAT:
+        pinconf |= PINCONF_FLOAT;
+        break;
+    }
+
+  pinconf |= PINCONF_SET_MODE(mode);
+
+  return cxd56_pin_config(pinconf);
+}
+
+/****************************************************************************
+ * Name: board_gpio_status
+ ****************************************************************************/
+
+int board_gpio_status(uint32_t pin, bool *input, bool *output, bool *drive,
+                      int *pull)
+{
+  int ret;
+  cxd56_pin_status_t pstat;
+  cxd56_gpio_status_t gstat;
+
+  DEBUGASSERT(input);
+  DEBUGASSERT(output);
+  DEBUGASSERT(drive);
+  DEBUGASSERT(pull);
+
+  ret = cxd56_pin_status(pin, &pstat);
+  if (ret < 0)
+    {
+      return ret;
+    }
+  *input = PINCONF_INPUT_ENABLED(pstat.input_en);
+  *drive = PINCONF_IS_DRIVE_HIGH(pstat.drive);
+  if (PINCONF_IS_FLOAT(pstat.pull))
+    {
+      *pull = PIN_FLOAT;
+    }
+  else if (PINCONF_IS_PULLUP(pstat.pull))
+    {
+      *pull = PIN_PULLUP;
+    }
+  else if (PINCONF_IS_PULLDOWN(pstat.pull))
+    {
+      *pull = PIN_PULLDOWN;
+    }
+  else
+    {
+      *pull = PIN_BUSKEEPER;
+    }
+
+  cxd56_gpio_status(pin, &gstat);
+  *output = gstat.output_en;
+
+  return pstat.mode;
+}
+
+/****************************************************************************
+ * Name: board_gpio_write
+ ****************************************************************************/
+
+void board_gpio_write(uint32_t pin, int value)
+{
+  if (value < 0)
+    {
+      cxd56_gpio_write_hiz(pin);
+    }
+  else
+    {
+      cxd56_gpio_write(pin, (value > 0));
+    }
+  return;
+}
+
+/****************************************************************************
+ * Name: board_gpio_read
+ ****************************************************************************/
+
+int board_gpio_read(uint32_t pin)
+{
+  return (int)cxd56_gpio_read(pin);
+}
+
+/****************************************************************************
+ * Name: board_gpio_intconfig
+ ****************************************************************************/
+
+int board_gpio_intconfig(uint32_t pin, int mode, bool filter, xcpt_t isr)
+{
+#ifdef CONFIG_CXD56_GPIO_IRQ
+  int ret = OK;
+  uint32_t gpiocfg = 0;
+
+  switch (mode)
+    {
+      case INT_HIGH_LEVEL:
+        gpiocfg = GPIOINT_LEVEL_HIGH;
+        break;
+      case INT_LOW_LEVEL:
+        gpiocfg = GPIOINT_LEVEL_LOW;
+        break;
+      case INT_RISING_EDGE:
+        gpiocfg = GPIOINT_PSEUDO_EDGE_RISE;
+        break;
+      case INT_FALLING_EDGE:
+        gpiocfg = GPIOINT_PSEUDO_EDGE_FALL;
+        break;
+      case INT_BOTH_EDGE:
+        gpiocfg = GPIOINT_PSEUDO_EDGE_BOTH;
+        break;
+      default:
+        if (isr)
+          {
+            return -EINVAL;
+          }
+        break;
+    }
+
+  if (filter)
+    {
+      gpiocfg |= GPIOINT_NOISE_FILTER_ENABLE;
+    }
+
+  ret = cxd56_gpioint_config(pin, gpiocfg, isr, NULL);
+  return ret;
+#else
+  return -ENOTSUP;
+#endif
+}
+
+/****************************************************************************
+ * Name: board_gpio_intstatus
+ ****************************************************************************/
+
+int board_gpio_intstatus(uint32_t pin, int *mode, bool *filter, bool *enabled)
+{
+#ifdef CONFIG_CXD56_GPIO_IRQ
+  int ret;
+  cxd56_gpioint_status_t stat;
+
+  DEBUGASSERT(mode);
+  DEBUGASSERT(filter);
+  DEBUGASSERT(enabled);
+
+  ret = cxd56_gpioint_status(pin, &stat);
+  if (ret < 0)
+    {
+      return ret;
+    }
+
+  switch (stat.polarity)
+    {
+      case GPIOINT_LEVEL_HIGH:
+        *mode = INT_HIGH_LEVEL;
+        break;
+      case GPIOINT_LEVEL_LOW:
+        *mode = INT_LOW_LEVEL;
+        break;
+      case GPIOINT_EDGE_RISE:
+        *mode = INT_RISING_EDGE;
+        break;
+      case GPIOINT_EDGE_FALL:
+        *mode = INT_FALLING_EDGE;
+        break;
+      case GPIOINT_EDGE_BOTH:
+        *mode = INT_BOTH_EDGE;
+        break;
+      default:
+        *mode = 0;
+        break;
+    }
+  *filter = stat.filter;
+  *enabled = stat.enable;
+
+  return stat.irq;
+#else
+  return -ENOTSUP;
+#endif
+}
+
+/****************************************************************************
+ * Name: board_gpio_int
+ ****************************************************************************/
+
+int board_gpio_int(uint32_t pin, bool enable)
+{
+#ifdef CONFIG_CXD56_GPIO_IRQ
+  int irq = cxd56_gpioint_irq(pin);
+
+  if (irq > 0)
+    {
+      if (enable)
+        {
+          cxd56_gpioint_enable(pin);
+        }
+      else
+        {
+          cxd56_gpioint_disable(pin);
+        }
+    }
+  return irq;
+#else
+  return -ENOTSUP;
+#endif
+}