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@@ -8,6 +8,13 @@ rfkill - RF switch subsystem support
===============================================================================
1: Implementation details
+The rfkill switch subsystem exists to add a generic interface to circuitry that
+can enable or disable the RF output of a radio *transmitter* of any type.
+
+When a rfkill switch is in the RFKILL_STATE_ON, the radio transmitter is
+*enabled*. When the rfkill switch is in the RFKILL_STATE_OFF, the radio
+transmitter is *disabled*.
+
The rfkill switch subsystem offers support for keys often found on laptops
to enable wireless devices like WiFi and Bluetooth.