diff --git a/configs/clicker2-stm32/src/clicker2-stm32.h b/configs/clicker2-stm32/src/clicker2-stm32.h
index 24dd9e54dc..5def0fdce8 100644
--- a/configs/clicker2-stm32/src/clicker2-stm32.h
+++ b/configs/clicker2-stm32/src/clicker2-stm32.h
@@ -233,6 +233,17 @@
  * Public Functions
  ************************************************************************************/
 
+/****************************************************************************
+ * Name: stm32_spidev_initialize
+ *
+ * Description:
+ *   Called to configure SPI chip select GPIO pins for the Mikroe Clicker2 STM32 
+ *   board.
+ *
+ ****************************************************************************/
+
+void weak_function stm32_spidev_initialize(void);
+
 /************************************************************************************
  * Name: stm32_bringup
  *
@@ -254,7 +265,7 @@ int stm32_bringup(void);
  *
  * Description:
  *   Called from stm32_boardinitialize very early in inialization to setup USB-related
- *   GPIO pins for the Olimex STM32 P407 board.
+ *   GPIO pins for the Mikroe Clicker2 STM32 board.
  *
  ************************************************************************************/
 
diff --git a/configs/clicker2-stm32/src/stm32_boot.c b/configs/clicker2-stm32/src/stm32_boot.c
index fff7bb8764..e87d316572 100644
--- a/configs/clicker2-stm32/src/stm32_boot.c
+++ b/configs/clicker2-stm32/src/stm32_boot.c
@@ -63,6 +63,17 @@
 
 void stm32_boardinitialize(void)
 {
+#if defined(CONFIG_STM32_SPI1) || defined(CONFIG_STM32_SPI2) || defined(CONFIG_STM32_SPI3)
+  /* Configure SPI chip selects if 1) SPI is not disabled, and 2) the weak function
+   * stm32_spidev_initialize() has been brought into the link.
+   */
+
+  if (stm32_spidev_initialize)
+    {
+      stm32_spidev_initialize();
+    }
+#endif
+
 #ifdef CONFIG_STM32_OTGFS
   /* Initialize USB if the 1) OTG FS controller is in the configuration and 2)
    * disabled, and 3) the weak function stm32_usb_configure() has been brought
diff --git a/configs/clicker2-stm32/src/stm32_spi.c b/configs/clicker2-stm32/src/stm32_spi.c
index 87e6e8d1d1..9780fcdb42 100644
--- a/configs/clicker2-stm32/src/stm32_spi.c
+++ b/configs/clicker2-stm32/src/stm32_spi.c
@@ -135,7 +135,18 @@ uint8_t stm32_spi2status(FAR struct spi_dev_s *dev, enum spi_dev_e devid)
 void stm32_spi3select(FAR struct spi_dev_s *dev, enum spi_dev_e devid, bool selected)
 {
   spiinfo("devid: %d CS: %s\n", (int)devid, selected ? "assert" : "de-assert");
-  /* To be provided */
+
+  switch(devid)
+  {
+#ifdef CONFIG_IEEE802154_MRF24J40
+    case SPIDEV_IEEE802154:
+      /* Set the GPIO low to select and high to de-select */
+      stm32_gpiowrite(GPIO_MB1_CS, !selected);
+      break;
+#endif
+    default:
+      break;
+  }
 }
 
 uint8_t stm32_spi3status(FAR struct spi_dev_s *dev, enum spi_dev_e devid)