Allow pullup/downs on power loss pin (#14986)

Marlin/src/Marlin.cpp

@@ -886,6 +886,10 @@ void setup() {
     runout.setup();
   #endif
 
+  #if ENABLED(POWER_LOSS_RECOVERY)
+    recovery.setup();
+  #endif
+
   setup_killpin();
 
   #if HAS_TMC220x

Marlin/src/feature/power_loss_recovery.h

@@ -26,12 +26,16 @@
  */
 
 #include "../sd/cardreader.h"
-#include "../inc/MarlinConfigPre.h"
+#include "../inc/MarlinConfig.h"
 
 #if ENABLED(MIXING_EXTRUDER)
   #include "../feature/mixing.h"
 #endif
 
+#if !defined(POWER_LOSS_STATE) && PIN_EXISTS(POWER_LOSS)
+  #define POWER_LOSS_STATE HIGH
+#endif
+
 //#define DEBUG_POWER_LOSS_RECOVERY
 //#define SAVE_EACH_CMD_MODE
 //#define SAVE_INFO_INTERVAL_MS 0
@@ -110,6 +114,20 @@ class PrintJobRecovery {
 
     static void init();
 
+    static inline void setup() {
+      #if PIN_EXISTS(POWER_LOSS)
+        #if ENABLED(POWER_LOSS_PULL)
+          #if POWER_LOSS_STATE == LOW
+            SET_INPUT_PULLUP(POWER_LOSS_PIN);
+          #else
+            SET_INPUT_PULLDOWN(POWER_LOSS_PIN);
+          #endif
+        #else
+          SET_INPUT(POWER_LOSS_PIN);
+        #endif
+      #endif
+    }
+
     static bool enabled;
     static void enable(const bool onoff);
     static void changed();