Configure dual Navigator test orientations

Author: nreymundo

emVdK/config.h

@@ -9,6 +9,15 @@
 #define AUTOMOUSE_TIMEOUT 620
 #define AUTOMOUSE_THRESHOLD 10
 #define AUTOMOUSE_SCROLL_THRESHOLD AUTOMOUSE_THRESHOLD / NAVIGATOR_SCROLL_DIVIDER
+
+// Existing Navigator Trackball is mounted on the right.
 #define NAVIGATOR_TRACKBALL_ROTATION 325
+
+// Test Navigator Trackpad is intended for the left side. The driver has no
+// left/right selector; side is physical on the shared I2C bus. Start with the
+// module default orientation explicitly documented here and adjust after a
+// real Trackpad is available if necessary.
+#define NAVIGATOR_TRACKPAD_ROTATION 0
+
 #define RGB_MATRIX_STARTUP_SPD 60