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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>
hifive-unleashed-5.1
Henrique de Moraes Holschuh 2008-06-23 17:22:56 -03:00 committed by John W. Linville
parent 1839cea91e
commit f3146aff7f
2 changed files with 10 additions and 3 deletions
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7
Documentation/rfkill.txt
View File

@ -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.

6
include/linux/rfkill.h
View File

@ -44,8 +44,8 @@ enum rfkill_type {
};
enum rfkill_state {
RFKILL_STATE_OFF = 0,
RFKILL_STATE_ON = 1,
RFKILL_STATE_OFF = 0, /* Radio output blocked */
RFKILL_STATE_ON = 1, /* Radio output active */
};
/**
@ -53,7 +53,7 @@ enum rfkill_state {
* @name: Name of the switch.
* @type: Radio type which the button controls, the value stored
* here should be a value from enum rfkill_type.
* @state: State of the switch (on/off).
* @state: State of the switch, "ON" means radio can operate.
* @user_claim_unsupported: Whether the hardware supports exclusive
* RF-kill control by userspace. Set this before registering.
* @user_claim: Set when the switch is controlled exlusively by userspace.