diff --git a/boards/ark/fmu-v6x/src/board_config.h b/boards/ark/fmu-v6x/src/board_config.h
index 4782fc7efd..9d940d59d9 100644
--- a/boards/ark/fmu-v6x/src/board_config.h
+++ b/boards/ark/fmu-v6x/src/board_config.h
@@ -204,7 +204,7 @@
 #define BOARD_ADC_OPEN_CIRCUIT_V     (5.6f)
 
 /* HW Version and Revision drive signals Default to 1 to detect */
-#define BOARD_HAS_HW_VERSIONING
+#define BOARD_HAS_HW_VERSIONING // migrate to Split
 
 #define GPIO_HW_VER_REV_DRIVE  /* PG0 */ (GPIO_OUTPUT|GPIO_PUSHPULL|GPIO_SPEED_2MHz|GPIO_OUTPUT_SET|GPIO_PORTG|GPIO_PIN0)
 #define GPIO_HW_REV_SENSE      /* PH4 */  GPIO_ADC3_INP15
diff --git a/boards/px4/fmu-v5x/src/board_config.h b/boards/px4/fmu-v5x/src/board_config.h
index 67cac1acd3..45e66c1183 100644
--- a/boards/px4/fmu-v5x/src/board_config.h
+++ b/boards/px4/fmu-v5x/src/board_config.h
@@ -179,7 +179,7 @@
 
 /* HW Version and Revision drive signals Default to 1 to detect */
 
-#define BOARD_HAS_HW_VERSIONING
+#define BOARD_HAS_HW_VERSIONING // migrate to Split
 
 #define GPIO_HW_VER_REV_DRIVE  /* PG0 */ (GPIO_OUTPUT|GPIO_PUSHPULL|GPIO_SPEED_2MHz|GPIO_OUTPUT_SET|GPIO_PORTG|GPIO_PIN0)
 #define GPIO_HW_REV_SENSE      /* PF5 */  ADC3_GPIO(15)
diff --git a/boards/px4/fmu-v6xrt/src/board_config.h b/boards/px4/fmu-v6xrt/src/board_config.h
index 1ea636d880..e7898b4bf4 100644
--- a/boards/px4/fmu-v6xrt/src/board_config.h
+++ b/boards/px4/fmu-v6xrt/src/board_config.h
@@ -288,7 +288,7 @@
 
 /* HW Version and Revision drive signals Default to 1 to detect */
 
-#define BOARD_HAS_HW_VERSIONING
+#define BOARD_HAS_HW_VERSIONING // migrate to Split
 
 #define HW_IOMUX (IOMUX_CMOS_OUTPUT | IOMUX_PULL_NONE | IOMUX_SLEW_FAST)
 
diff --git a/boards/sky-drones/smartap-airlink/src/board_config.h b/boards/sky-drones/smartap-airlink/src/board_config.h
index ac21a1686c..5b957e0694 100644
--- a/boards/sky-drones/smartap-airlink/src/board_config.h
+++ b/boards/sky-drones/smartap-airlink/src/board_config.h
@@ -168,7 +168,7 @@
 
 /* HW Version and Revision drive signals Default to 1 to detect */
 
-#define BOARD_HAS_HW_VERSIONING
+#define BOARD_HAS_HW_VERSIONING // migrate to Split
 
 #define GPIO_HW_VER_REV_DRIVE  /* PG0 */ (GPIO_OUTPUT|GPIO_PUSHPULL|GPIO_SPEED_2MHz|GPIO_OUTPUT_SET|GPIO_PORTG|GPIO_PIN0)
 #define GPIO_HW_REV_SENSE      /* PF5 */  ADC3_GPIO(15)