4 files changed, 65 insertions, 1 deletions
diff --git a/bsps/arm/stm32h7/start/stm32h7-hal-eth.c b/bsps/arm/stm32h7/start/stm32h7-hal-eth.c
index 46475f4316..b9dac6d7f9 100644
--- a/bsps/arm/stm32h7/start/stm32h7-hal-eth.c
+++ b/bsps/arm/stm32h7/start/stm32h7-hal-eth.c
@@ -31,10 +31,12 @@
 
 #include <stm32h7/hal.h>
 
+#include <bspopts.h>
+
 static const stm32h7_gpio_config gpiog = {
   .regs = GPIOG,
   .config = {
-    .Pin = GPIO_PIN_11 | GPIO_PIN_12 | GPIO_PIN_13,
+    .Pin = STM32H7_ETH_GPIOG_PINS,
     .Mode = GPIO_MODE_AF_PP,
     .Pull = GPIO_NOPULL,
     .Speed = GPIO_SPEED_FREQ_LOW,
@@ -64,6 +66,21 @@ static const stm32h7_gpio_config gpioa = {
   }
 };
 
+#ifdef STM32H7_ETH_GPIOB_PINS
+
+static const stm32h7_gpio_config gpiob = {
+  .regs = GPIOB,
+  .config = {
+    .Pin = STM32H7_ETH_GPIOB_PINS,
+    .Mode = GPIO_MODE_AF_PP,
+    .Pull = GPIO_NOPULL,
+    .Speed = GPIO_SPEED_FREQ_LOW,
+    .Alternate = GPIO_AF11_ETH
+  }
+};
+
+#endif
+
 void
 HAL_ETH_MspInit(ETH_HandleTypeDef *heth)
 {
@@ -73,4 +90,7 @@ HAL_ETH_MspInit(ETH_HandleTypeDef *heth)
   stm32h7_gpio_init(&gpiog);
   stm32h7_gpio_init(&gpioc);
   stm32h7_gpio_init(&gpioa);
+#ifdef STM32H7_ETH_GPIOB_PINS
+  stm32h7_gpio_init(&gpiob);
+#endif
 }
diff --git a/spec/build/bsps/arm/stm32h7/grp.yml b/spec/build/bsps/arm/stm32h7/grp.yml
index 2147cdec88..a7e7affa05 100644
--- a/spec/build/bsps/arm/stm32h7/grp.yml
+++ b/spec/build/bsps/arm/stm32h7/grp.yml
@@ -84,6 +84,10 @@ links:
 - role: build-dependency
   uid: optvariant
 - role: build-dependency
+  uid: optethgpiogregs
+- role: build-dependency
+  uid: optethgpiobregs
+- role: build-dependency
   uid: ../../optconsolebaud
 - role: build-dependency
   uid: ../../optconsoleirq
diff --git a/spec/build/bsps/arm/stm32h7/optethgpiobregs.yml b/spec/build/bsps/arm/stm32h7/optethgpiobregs.yml
new file mode 100644
index 0000000000..d9898cbc79
--- /dev/null
+++ b/spec/build/bsps/arm/stm32h7/optethgpiobregs.yml
@@ -0,0 +1,20 @@
+actions:
+- get-string: null
+- define-unquoted: null
+build-type: option
+default: null
+default-by-family: []
+default-by-variant:
+- value: GPIO_PIN_13
+  variants:
+  - arm/nucleo-h743zi
+enabled-by: true
+format: '{}'
+links: []
+name: STM32H7_ETH_GPIOB_PINS
+description: |
+  GPIO B pins used for the ETH pin configuration.
+type: build
+SPDX-License-Identifier: CC-BY-SA-4.0 OR BSD-2-Clause
+copyrights:
+- Copyright (C) 2021 embedded brains GmbH (http://www.embedded-brains.de)
diff --git a/spec/build/bsps/arm/stm32h7/optethgpiogregs.yml b/spec/build/bsps/arm/stm32h7/optethgpiogregs.yml
new file mode 100644
index 0000000000..6a79082927
--- /dev/null
+++ b/spec/build/bsps/arm/stm32h7/optethgpiogregs.yml
@@ -0,0 +1,20 @@
+actions:
+- get-string: null
+- define-unquoted: null
+build-type: option
+default: ( GPIO_PIN_11 | GPIO_PIN_12 | GPIO_PIN_13 )
+default-by-family: []
+default-by-variant:
+- value: ( GPIO_PIN_2 | GPIO_PIN_11 | GPIO_PIN_13 )
+  variants:
+  - arm/nucleo-h743zi
+enabled-by: true
+format: '{}'
+links: []
+name: STM32H7_ETH_GPIOG_PINS
+description: |
+  GPIO G pins used for the ETH pin configuration.
+type: build
+SPDX-License-Identifier: CC-BY-SA-4.0 OR BSD-2-Clause
+copyrights:
+- Copyright (C) 2021 embedded brains GmbH (http://www.embedded-brains.de)