From 4ceba981b1557ce72b1789cec983e098bb0bc9bf Mon Sep 17 00:00:00 2001
From: Mike La Spina <mike.laspina@shaw.ca>
Date: Wed, 5 Jan 2022 06:14:40 -0600
Subject: [PATCH] =?UTF-8?q?=F0=9F=90=9B=20Define=20required=20endstop=20en?=
 =?UTF-8?q?ums=20(#23425)?=
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---
 Marlin/src/module/endstops.h | 30 ++++++++++++++++++++----------
 1 file changed, 20 insertions(+), 10 deletions(-)

diff --git a/Marlin/src/module/endstops.h b/Marlin/src/module/endstops.h
index e1ee933e83..82a44cf95b 100644
--- a/Marlin/src/module/endstops.h
+++ b/Marlin/src/module/endstops.h
@@ -47,16 +47,26 @@ enum EndstopEnum : char {
   _ES_ITEM(HAS_K_MAX, K_MAX)
 
   // Extra Endstops for XYZ
-  _ES_ITEM(HAS_X2_MIN, X2_MIN)
-  _ES_ITEM(HAS_X2_MAX, X2_MAX)
-  _ES_ITEM(HAS_Y2_MIN, Y2_MIN)
-  _ES_ITEM(HAS_Y2_MAX, Y2_MAX)
-  _ES_ITEM(HAS_Z2_MIN, Z2_MIN)
-  _ES_ITEM(HAS_Z2_MAX, Z2_MAX)
-  _ES_ITEM(HAS_Z3_MIN, Z3_MIN)
-  _ES_ITEM(HAS_Z3_MAX, Z3_MAX)
-  _ES_ITEM(HAS_Z4_MIN, Z4_MIN)
-  _ES_ITEM(HAS_Z4_MAX, Z4_MAX)
+  #if ENABLED(X_DUAL_ENDSTOPS)
+    _ES_ITEM(HAS_X_MIN, X2_MIN)
+    _ES_ITEM(HAS_X_MAX, X2_MAX)
+  #endif
+  #if ENABLED(Y_DUAL_ENDSTOPS)
+    _ES_ITEM(HAS_Y_MIN, Y2_MIN)
+    _ES_ITEM(HAS_Y_MAX, Y2_MAX)
+  #endif
+  #if ENABLED(Z_MULTI_ENDSTOPS)
+    _ES_ITEM(HAS_Z_MIN, Z2_MIN)
+    _ES_ITEM(HAS_Z_MAX, Z2_MAX)
+    #if NUM_Z_STEPPER_DRIVERS >= 3
+      _ES_ITEM(HAS_Z_MIN, Z3_MIN)
+      _ES_ITEM(HAS_Z_MAX, Z3_MAX)
+    #endif
+    #if NUM_Z_STEPPER_DRIVERS >= 4
+      _ES_ITEM(HAS_Z_MIN, Z4_MIN)
+      _ES_ITEM(HAS_Z_MAX, Z4_MAX)
+    #endif
+  #endif
 
   // Bed Probe state is distinct or shared with Z_MIN (i.e., when the probe is the only Z endstop)
   #if !HAS_DELTA_SENSORLESS_PROBING