Update default/Configuration_adv.h

config/default/Configuration_adv.h

   //#define E5_CS_PIN         -1
 
   /**
-   * Use software SPI for TMC2130.
    * Software option for SPI driven drivers (TMC2130, TMC2160, TMC2660, TMC5130 and TMC5160).
    * The default SW SPI pins are defined the respective pins files,
    * but you can override or define them here.
   //#define SOFTWARE_DRIVER_ENABLE
 
   /**
-   * TMC2130, TMC2160, TMC2208, TMC5130 and TMC5160 only
+   * TMC2130, TMC2160, TMC2208, TMC2209, TMC5130 and TMC5160 only
    * Use Trinamic's ultra quiet stepping mode.
    * When disabled, Marlin will use spreadCycle stepping mode.
    */
 
   /**
    * Monitor Trinamic drivers for error conditions,
-   * like overtemperature and short to ground. TMC2208 requires hardware serial.
+   * like overtemperature and short to ground.
    * In the case of overtemperature Marlin can decrease the driver current until error condition clears.
    * Other detected conditions can be used to stop the current print.
    * Relevant g-codes:
   #endif
 
   /**
-   * TMC2130, TMC2160, TMC2208, TMC5130 and TMC5160 only
+   * TMC2130, TMC2160, TMC2208, TMC2209, TMC5130 and TMC5160 only
    * The driver will switch to spreadCycle when stepper speed is over HYBRID_THRESHOLD.
    * This mode allows for faster movements at the expense of higher noise levels.
    * STEALTHCHOP_(XY|Z|E) must be enabled to use HYBRID_THRESHOLD.
   #define E5_HYBRID_THRESHOLD     30
 
   /**
-   * TMC2130, TMC2160, TMC2660, TMC5130, and TMC5160 only
+   * TMC2130, TMC2160, TMC2209, TMC2660, TMC5130, and TMC5160 only
    * Use StallGuard2 to sense an obstacle and trigger an endstop.
    * Connect the stepper driver's DIAG1 pin to the X/Y endstop pin.
    * X, Y, and Z homing will always be done in spreadCycle mode.
    * It is advised to set X/Y/Z_HOME_BUMP_MM to 0.
    * M914 X/Y/Z to live tune the setting
    */
-  //#define SENSORLESS_HOMING // TMC2130 only
+  //#define SENSORLESS_HOMING // StallGuard capable drivers only
 
   /**
    * Use StallGuard2 to probe the bed with the nozzle.
    * CAUTION: This could cause damage to machines that use a lead screw or threaded rod
    *          to move the Z axis. Take extreme care when attempting to enable this feature.
    */
-  //#define SENSORLESS_PROBING // TMC2130 only
+  //#define SENSORLESS_PROBING // StallGuard capable drivers only
 
   #if EITHER(SENSORLESS_HOMING, SENSORLESS_PROBING)
+    // TMC2209: 0...255. TMC2130: -64...63
     #define X_STALL_SENSITIVITY  8
     #define Y_STALL_SENSITIVITY  8
     //#define Z_STALL_SENSITIVITY  8