diff --git a/boards/common/saml1x/include/board.h b/boards/common/saml1x/include/board.h
index 9e35340646..7402e333c6 100644
--- a/boards/common/saml1x/include/board.h
+++ b/boards/common/saml1x/include/board.h
@@ -66,7 +66,6 @@ extern "C" {
  * @name SW0 (Button) pin definitions
  * @{
  */
-#define BTN0_PORT           _PORT->Group[PA]
 #define BTN0_PIN            GPIO_PIN(PA, 27)
 #define BTN0_MODE           GPIO_IN_PU
 /** @} */
diff --git a/boards/hamilton/include/board.h b/boards/hamilton/include/board.h
index cf1f68abc3..d3f5aa0e93 100644
--- a/boards/hamilton/include/board.h
+++ b/boards/hamilton/include/board.h
@@ -68,7 +68,6 @@ extern "C" {
  * @name    Button pin definitions
  * @{
  */
-#define BTN0_PORT                PORT->Group[0]
 #define BTN0_PIN                 GPIO_PIN(0, 18)
 #define BTN0_MODE                GPIO_IN_PU
 /** @} */
diff --git a/boards/pba-d-01-kw2x/include/board.h b/boards/pba-d-01-kw2x/include/board.h
index b4ddbfc80d..c0a0514328 100644
--- a/boards/pba-d-01-kw2x/include/board.h
+++ b/boards/pba-d-01-kw2x/include/board.h
@@ -58,7 +58,6 @@ extern "C"
  * @name Macro for button S1/S2.
  * @{
  */
-#define BTN0_PORT           PORTD
 #define BTN0_PIN            GPIO_PIN(PORT_D, 1)
 #define BTN0_MODE           GPIO_IN_PU
 /** @} */
diff --git a/boards/samd10-xmini/include/board.h b/boards/samd10-xmini/include/board.h
index 0f7f0af680..6d040c4678 100644
--- a/boards/samd10-xmini/include/board.h
+++ b/boards/samd10-xmini/include/board.h
@@ -56,7 +56,6 @@ extern "C" {
  * @name SW0 (Button) pin definitions
  * @{
  */
-#define BTN0_PORT           PORT->Group[PA]
 #define BTN0_PIN            GPIO_PIN(PA, 25)
 #define BTN0_MODE           GPIO_IN_PU
 /** @} */
diff --git a/boards/samd20-xpro/include/board.h b/boards/samd20-xpro/include/board.h
index a5b4b8fed0..38f2a7e71d 100644
--- a/boards/samd20-xpro/include/board.h
+++ b/boards/samd20-xpro/include/board.h
@@ -54,7 +54,6 @@ extern "C" {
  * @name SW0 (Button) pin definitions
  * @{
  */
-#define BTN0_PORT           PORT->Group[PA]
 #define BTN0_PIN            GPIO_PIN(PA, 15)
 #define BTN0_MODE           GPIO_IN_PU
 /** @} */
diff --git a/boards/samd21-xpro/include/board.h b/boards/samd21-xpro/include/board.h
index 707c6e77d4..afaa639b63 100644
--- a/boards/samd21-xpro/include/board.h
+++ b/boards/samd21-xpro/include/board.h
@@ -57,7 +57,6 @@ extern "C" {
  * @name SW0 (Button) pin definitions
  * @{
  */
-#define BTN0_PORT           PORT->Group[PA]
 #define BTN0_PIN            GPIO_PIN(PA, 15)
 #define BTN0_MODE           GPIO_IN_PU
 /** @} */
diff --git a/boards/same54-xpro/include/board.h b/boards/same54-xpro/include/board.h
index 737a0fe480..63cb027927 100644
--- a/boards/same54-xpro/include/board.h
+++ b/boards/same54-xpro/include/board.h
@@ -63,7 +63,6 @@ extern "C" {
  * @name SW0 (Button) pin definitions
  * @{
  */
-#define BTN0_PORT           PORT->Group[PB]
 #define BTN0_PIN            GPIO_PIN(PB, 31)
 #define BTN0_MODE           GPIO_IN_PU
 /** @} */
diff --git a/boards/saml21-xpro/include/board.h b/boards/saml21-xpro/include/board.h
index c4a708a060..cc0ae2a34e 100644
--- a/boards/saml21-xpro/include/board.h
+++ b/boards/saml21-xpro/include/board.h
@@ -44,7 +44,6 @@ extern "C" {
  * @name SW0 (Button) pin definitions
  * @{
  */
-#define BTN0_PORT           PORT->Group[PA]
 #define BTN0_PIN            GPIO_PIN(PA, 2)
 #define BTN0_MODE           GPIO_IN_PU
 /** @} */
diff --git a/boards/samr21-xpro/include/board.h b/boards/samr21-xpro/include/board.h
index 19d76056fb..590e5f0965 100644
--- a/boards/samr21-xpro/include/board.h
+++ b/boards/samr21-xpro/include/board.h
@@ -75,7 +75,6 @@ extern "C" {
  * @name    SW0 (Button) pin definitions
  * @{
  */
-#define BTN0_PORT           PORT->Group[0]
 #define BTN0_PIN            GPIO_PIN(0, 28)
 #define BTN0_MODE           GPIO_IN_PU
 /** @} */
diff --git a/boards/samr30-xpro/include/board.h b/boards/samr30-xpro/include/board.h
index a0711ff630..5286e32f82 100644
--- a/boards/samr30-xpro/include/board.h
+++ b/boards/samr30-xpro/include/board.h
@@ -62,7 +62,6 @@ extern "C" {
  * @name    BTN0 (SW0 Button) pin definitions
  * @{
  */
-#define BTN0_PORT                   PORT->Group[0]
 #define BTN0_PIN                    GPIO_PIN(PA, 28)
 #define BTN0_MODE                   GPIO_IN_PU
 /** @} */
diff --git a/boards/samr34-xpro/include/board.h b/boards/samr34-xpro/include/board.h
index 97c7c4354d..81d9302a23 100644
--- a/boards/samr34-xpro/include/board.h
+++ b/boards/samr34-xpro/include/board.h
@@ -72,7 +72,6 @@ extern "C" {
  * @name    BTN0 (SW0 Button) pin definitions
  * @{
  */
-#define BTN0_PORT                   PORT->Group[0]                      /**< GPIO port      */
 #define BTN0_PIN                    GPIO_PIN(PA, 28)                    /**< GPIO pin       */
 #define BTN0_MODE                   GPIO_IN_PU                          /**< Pull Up GPIO   */
 /** @} */
diff --git a/boards/sensebox_samd21/include/board.h b/boards/sensebox_samd21/include/board.h
index 7db34cbee6..d2a069d138 100644
--- a/boards/sensebox_samd21/include/board.h
+++ b/boards/sensebox_samd21/include/board.h
@@ -56,7 +56,6 @@ extern "C" {
  * @name    SW0 (Button) pin definitions
  * @{
  */
-#define BTN0_PORT           PORT->Group[PA]
 #define BTN0_PIN            GPIO_PIN(PA, 20)
 #define BTN0_MODE           GPIO_IN_PU
 /** @} */
diff --git a/boards/stm32l0538-disco/include/board.h b/boards/stm32l0538-disco/include/board.h
index bbde0f619c..7ef4284181 100644
--- a/boards/stm32l0538-disco/include/board.h
+++ b/boards/stm32l0538-disco/include/board.h
@@ -48,7 +48,6 @@ extern "C" {
  * @{
  */
 #define BTN0_PIN            GPIO_PIN(PORT_A, 0)
-#define BTN0_PORT           GPIOA
 #define BTN0_MODE           GPIO_IN
 /** @} */