diff --git a/Marlin/src/HAL/STM32/HAL.cpp b/Marlin/src/HAL/STM32/HAL.cpp
index 9e7922e3a403..a04a24c1123c 100644
--- a/Marlin/src/HAL/STM32/HAL.cpp
+++ b/Marlin/src/HAL/STM32/HAL.cpp
@@ -63,8 +63,6 @@ TERN_(POSTMORTEM_DEBUGGING, extern void install_min_serial());
 
 // HAL initialization task
 void HAL_init() {
-  FastIO_init();
-
   // Ensure F_CPU is a constant expression.
   // If the compiler breaks here, it means that delay code that should compute at compile time will not work.
   // So better safe than sorry here.
diff --git a/Marlin/src/HAL/STM32/fastio.cpp b/Marlin/src/HAL/STM32/fastio.cpp
index 9e6a2fb658c3..b34555b8c841 100644
--- a/Marlin/src/HAL/STM32/fastio.cpp
+++ b/Marlin/src/HAL/STM32/fastio.cpp
@@ -26,7 +26,7 @@
 
 #include "../../inc/MarlinConfig.h"
 
-GPIO_TypeDef* FastIOPortMap[LastPort + 1];
+GPIO_TypeDef* FastIOPortMap[LastPort + 1] = { 0 };
 
 void FastIO_init() {
   LOOP_L_N(i, NUM_DIGITAL_PINS)
diff --git a/Marlin/src/HAL/STM32/fastio.h b/Marlin/src/HAL/STM32/fastio.h
index 17751c44dd8d..4a489544716f 100644
--- a/Marlin/src/HAL/STM32/fastio.h
+++ b/Marlin/src/HAL/STM32/fastio.h
@@ -38,6 +38,7 @@ extern GPIO_TypeDef * FastIOPortMap[];
 // ------------------------
 
 void FastIO_init(); // Must be called before using fast io macros
+#define FASTIO_INIT() FastIO_init()
 
 // ------------------------
 // Defines
diff --git a/Marlin/src/HAL/STM32F1/pinsDebug.h b/Marlin/src/HAL/STM32F1/pinsDebug.h
index 8e7a3d8135fd..b018a0fc8c0a 100644
--- a/Marlin/src/HAL/STM32F1/pinsDebug.h
+++ b/Marlin/src/HAL/STM32F1/pinsDebug.h
@@ -19,15 +19,15 @@
 #pragma once
 
 /**
- * Support routines for STM32GENERIC (Maple)
+ * Support routines for MAPLE_STM32F1
  */
 
 /**
  * Translation of routines & variables used by pinsDebug.h
  */
 
-#ifndef BOARD_NR_GPIO_PINS  // Only in STM32GENERIC (Maple)
-   #error "Expected BOARD_NR_GPIO_PINS not found"
+#ifndef BOARD_NR_GPIO_PINS // Only in MAPLE_STM32F1
+  #error "Expected BOARD_NR_GPIO_PINS not found"
 #endif
 
 #include "fastio.h"
diff --git a/Marlin/src/MarlinCore.cpp b/Marlin/src/MarlinCore.cpp
index 6134699aa101..e8f9f16a8f9a 100644
--- a/Marlin/src/MarlinCore.cpp
+++ b/Marlin/src/MarlinCore.cpp
@@ -1131,6 +1131,10 @@ inline void tmc_standby_setup() {
  *  - Set Marlin to RUNNING State
  */
 void setup() {
+  #ifdef FASTIO_INIT
+    FASTIO_INIT();
+  #endif
+
   #ifdef BOARD_PREINIT
     BOARD_PREINIT(); // Low-level init (before serial init)
   #endif
diff --git a/Marlin/src/pins/stm32f1/pins_LONGER3D_LK.h b/Marlin/src/pins/stm32f1/pins_LONGER3D_LK.h
index bdf215fa8e4a..f9ec42b68efe 100644
--- a/Marlin/src/pins/stm32f1/pins_LONGER3D_LK.h
+++ b/Marlin/src/pins/stm32f1/pins_LONGER3D_LK.h
@@ -99,19 +99,12 @@
 // Avoid nozzle heat and fan start before serial init
 #define BOARD_OPENDRAIN_MOSFETS
 
-#define BOARD_INIT_OD_PINS() { \
+#define BOARD_PREINIT() { \
   OUT_WRITE_OD(HEATER_0_PIN, 0); \
   OUT_WRITE_OD(HEATER_BED_PIN, 0); \
   OUT_WRITE_OD(FAN_PIN, 0); \
 }
 
-#ifdef MAPLE_STM32F1
-  // Only Maple Framework allow that early
-  #define BOARD_PREINIT BOARD_INIT_OD_PINS
-#else
-  #define BOARD_INIT BOARD_INIT_OD_PINS
-#endif
-
 //
 // PWM for a servo probe
 // Other servo devices are not supported on this board!