+/*
+ * The complex logic input threshold voltage support with a custom level
+ * is not operational yet. Ideally we could support the set of pre-made
+ * voltages with their pretty text labels, and one of them referencing
+ * a voltage which is user specified. But not all applications support
+ * this setup equally well, or present it most appropriately to users.
+ * So let's implement something simpler for the moment until the more
+ * complex approach becomes accessible in all applications.
+ *
+ * Strictly speaking the logic input threshold voltage is a property of
+ * the "Logic" channel group. Again not all applications support such
+ * an approach, and like to see them as global device properties.
+ */
+#define WITH_THRESHOLD_DEVCFG 1
+#define WITH_THRESHOLD_SIMPLE 1
+#if !WITH_THRESHOLD_DEVCFG && !WITH_THRESHOLD_SIMPLE
+# error "Custom threshold in Logic group is not implemented."
+#endif
+