diff --git a/arch/arm/src/lpc43xx/Kconfig b/arch/arm/src/lpc43xx/Kconfig
index 5b7d730151..c6df85ae35 100644
--- a/arch/arm/src/lpc43xx/Kconfig
+++ b/arch/arm/src/lpc43xx/Kconfig
@@ -150,6 +150,13 @@ endchoice # LPC43XX Boot Configuration
 
 menu "LPC43xx Peripheral Support"
 
+
+config GPIO_IRQ
+        bool "GPIO interrupt support"
+        default n
+        ---help---
+                Enable support for GPIO interrupts
+
 config LPC43_ADC0
 	bool "ADC0"
 	default n
diff --git a/arch/arm/src/lpc43xx/lpc43_gpio.c b/arch/arm/src/lpc43xx/lpc43_gpio.c
index 3d5db11b7e..49b7f9b27f 100644
--- a/arch/arm/src/lpc43xx/lpc43_gpio.c
+++ b/arch/arm/src/lpc43xx/lpc43_gpio.c
@@ -49,6 +49,10 @@
 #include "up_arch.h"
 #include "lpc43_gpio.h"
 
+#ifdef CONFIG_GPIO_IRQ
+#include "lpc43_gpioint.h"
+#endif
+
 /****************************************************************************
  * Pre-processor Definitions
  ****************************************************************************/
diff --git a/arch/arm/src/lpc43xx/lpc43_gpio.h b/arch/arm/src/lpc43xx/lpc43_gpio.h
index 1ee14fac63..4f16c841de 100644
--- a/arch/arm/src/lpc43xx/lpc43_gpio.h
+++ b/arch/arm/src/lpc43xx/lpc43_gpio.h
@@ -143,7 +143,7 @@
  * ..CC C... .... ....
  */
 
-#define GPIO_PININT_SHIFT          (10)        /* Bits 11-13: Pin interrupt number */
+#define GPIO_PININT_SHIFT          (11)        /* Bits 11-13: Pin interrupt number */
 #define GPIO_PININT_MASK           (7 << GPIO_PININT_SHIFT)
 #  define GPIO_PININT0             (0 << GPIO_PININT_SHIFT)
 #  define GPIO_PININT1             (1 << GPIO_PININT_SHIFT)
@@ -162,9 +162,9 @@
  * .... .III .... ....
  */
 
-#define _GPIO_INT_LEVEL            (1 << 10)  /* Bit 10: 1=Level (vs edge) */
-#define _GPIO_INT_HIGH             (1 << 9)   /* Bit 9:  1=High level or rising edge */
-#define _GPIO_INT_LOW              (1 << 8)   /* Bit 8:  1=Low level or falling edge */
+#define _GPIO_INT_EDGE             (1 << 10)  /* Bit 10: 1=Edge (vs level) */
+#define _GPIO_INT_LOW              (1 << 9)   /* Bit 9:  1=Low level or falling edge */
+#define _GPIO_INT_HIGH             (1 << 8)   /* Bit 8:  1=High level or rising edge */
 
 #define GPIO_INT_SHIFT             (8)        /* Bits 8-10: Interrupt mode */
 #define GPIO_INT_MASK              (7 << GPIO_INT_SHIFT)
@@ -176,8 +176,8 @@
 
 #define GPIO_IS_ACTIVE_HI(p)       (((p) & _GPIO_INT_HIGH)  != 0)
 #define GPIO_IS_ACTIVE_LOW(p)      (((p) & _GPIO_INT_LOW)   != 0)
-#define GPIO_IS_EDGE(p)            (((p) & _GPIO_INT_LEVEL) == 0)
-#define GPIO_IS_LEVEL(p)           (((p) & _GPIO_INT_LEVEL) != 0)
+#define GPIO_IS_LEVEL(p)           (((p) & _GPIO_INT_EDGE) == 0)
+#define GPIO_IS_EDGE(p)            (((p) & _GPIO_INT_EDGE) != 0)
 
 /* GPIO Port Number:
  *
diff --git a/arch/arm/src/lpc43xx/lpc43_gpioint.c b/arch/arm/src/lpc43xx/lpc43_gpioint.c
index 51e010ba33..029e2aec20 100644
--- a/arch/arm/src/lpc43xx/lpc43_gpioint.c
+++ b/arch/arm/src/lpc43xx/lpc43_gpioint.c
@@ -57,6 +57,7 @@
 
 #include <arch/board/board.h>
 #include <nuttx/config.h>
+#include <debug.h>
 
 #include <errno.h>
 
@@ -176,7 +177,7 @@ int lpc43_gpioint_grpinitialize(int group, bool anded, bool level)
 int lpc43_gpioint_pinconfig(uint16_t gpiocfg)
 {
   unsigned int port    = ((gpiocfg & GPIO_PORT_MASK) >> GPIO_PORT_SHIFT);
-  unsigned int pin     = ((gpiocfg & GPIO_PORT_MASK) >> GPIO_PORT_SHIFT);
+  unsigned int pin     = ((gpiocfg & GPIO_PIN_MASK) >> GPIO_PIN_SHIFT);
   unsigned int pinint  = ((gpiocfg & GPIO_PININT_MASK) >> GPIO_PININT_SHIFT);
   uint32_t     bitmask = (1 << pinint);
   uint32_t     regval;
@@ -227,6 +228,8 @@ int lpc43_gpioint_pinconfig(uint16_t gpiocfg)
 
   /* Configure the active high level or rising edge */
 
+  /* TODO: this works for edge sensitive, but not level sensitive, active level is only controlled in IENF */
+
   regval = getreg32(LPC43_GPIOINT_IENR);
   if (GPIO_IS_ACTIVE_HI(gpiocfg))
     {
@@ -321,4 +324,28 @@ int lpc43_gpioint_grpconfig(uint16_t gpiocfg)
   return OK;
 }
 
+/****************************************************************************
+ * Name: lpc43_gpioint_ack
+ *
+ * Description:
+ *   Acknowledge the interrupt for a given pint interrupt number. Call this
+ *   inside the interrupt handler. For edge sensitive interrupts, the interrupt
+ *   status is cleared. For level sensitive interrupts, the active-high/-low
+ *   sensitivity is inverted.
+ *
+ * Returned Value:
+ *   Zero on success; a negated errno value on failure.
+ *
+ ****************************************************************************/
+
+int lpc43_gpioint_ack(uint8_t intnumber)
+{
+  uint32_t regval;
+
+  regval = getreg32(LPC43_GPIOINT_IST);
+  regval |= (1 << intnumber);
+  putreg32(regval, LPC43_GPIOINT_IST);
+  return OK;
+}
+
 #endif /* CONFIG_GPIO_IRQ */
diff --git a/arch/arm/src/lpc43xx/lpc43_gpioint.h b/arch/arm/src/lpc43xx/lpc43_gpioint.h
index 35b22f7c7f..ec34649455 100644
--- a/arch/arm/src/lpc43xx/lpc43_gpioint.h
+++ b/arch/arm/src/lpc43xx/lpc43_gpioint.h
@@ -136,5 +136,21 @@ int lpc43_gpioint_pinconfig(uint16_t gpiocfg);
 
 int lpc43_gpioint_grpconfig(uint16_t gpiocfg);
 
+/****************************************************************************
+ * Name: lpc43_gpioint_ack
+ *
+ * Description:
+ *   Acknowledge the interrupt for a given pint interrupt number. Call this
+ *   inside the interrupt handler. For edge sensitive interrupts, the interrupt
+ *   status is cleared. For level sensitive interrupts, the active-high/-low
+ *   sensitivity is inverted.
+ *
+ * Returned Value:
+ *   Zero on success; a negated errno value on failure.
+ *
+ ****************************************************************************/
+
+int lpc43_gpioint_ack(uint8_t intnumber);
+
 #endif /* CONFIG_GPIO_IRQ */
 #endif /* __ARCH_ARM_SRC_LPC43XX_LPC43_GPIOINT_H */