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authorHenrique de Moraes Holschuh <hmh@hmh.eng.br>2008-06-23 17:22:56 -0300
committerJohn W. Linville <linville@tuxdriver.com>2008-06-26 14:21:19 -0400
commitf3146aff7f283c8699e0c97df6307a705786eeba (patch)
tree40320f74bf2408f814960d6e2772e6100eed6e7c /Documentation/rfkill.txt
parent1839cea91e5629756dd4f87c5d70d8a18b89c0b4 (diff)
downloadlinux-linaro-stable-f3146aff7f283c8699e0c97df6307a705786eeba.tar.gz
rfkill: clarify meaning of rfkill states
rfkill really should have been named rfswitch. As it is, one can get confused whether RFKILL_STATE_ON means the KILL switch is on (and therefore, the radio is being *blocked* from operating), or whether it means the RADIO rf output is on. Clearly state that RFKILL_STATE_ON means the radio is *unblocked* from operating (i.e. there is no rf killing going on). Signed-off-by: Henrique de Moraes Holschuh <hmh@hmh.eng.br> Acked-by: Ivo van Doorn <IvDoorn@gmail.com> Cc: Dmitry Torokhov <dtor@mail.ru> Signed-off-by: John W. Linville <linville@tuxdriver.com>
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diff --git a/Documentation/rfkill.txt b/Documentation/rfkill.txt
index a83ff23cd68c..ec75d6d34785 100644
--- a/Documentation/rfkill.txt
+++ b/Documentation/rfkill.txt
@@ -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.