[PATCH 04/15] rfkill: clarify meaning of rfkill states

From: Henrique de Moraes Holschuh
Date: Sun May 18 2008 - 14:54:49 EST

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@xxxxxxxxxx>
Cc: Ivo van Doorn <IvDoorn@xxxxxxxxx>
Cc: John W. Linville <linville@xxxxxxxxxxxxx>
Cc: Dmitry Torokhov <dtor@xxxxxxx>
Documentation/rfkill.txt | 7 +++++++
include/linux/rfkill.h | 6 +++---
2 files changed, 10 insertions(+), 3 deletions(-)

diff --git a/Documentation/rfkill.txt b/Documentation/rfkill.txt
index a83ff23..ec75d6d 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.

diff --git a/include/linux/rfkill.h b/include/linux/rfkill.h
index e3ab21d..ca89ae1 100644
--- a/include/linux/rfkill.h
+++ b/include/linux/rfkill.h
@@ -44,8 +44,8 @@ enum rfkill_type {

enum rfkill_state {
+ 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.

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