--- /dev/null
+/**
+ * @brief Communication port capability that a device is supported natively,
+ * or able to emulate low level serial transmission behaviour specify
+ * by POSIX1-2008, section 11.
+ *
+ */
+potens(TERMPORT),
+
+/**
+ * @brief Hardware timer capability that allow such device to be integrated
+ and utilised by timer subsystem
+ *
+ */
+potens(HWTIMER),
+
+/**
+ * @brief RTC capability.
+ *
+ */
+potens(HWRTC),
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