torvalds/linux

rfkill - radio frequency (RF) connector kill switch support

For details to this subsystem look at Documentation/driver-api/rfkill.rst.

For the deprecated ``/sys/class/rfkill/*/claim`` knobs of this interface look in
Documentation/ABI/removed/sysfs-class-rfkill.

What:         /sys/class/rfkill
Date:        09-Jul-2007
KernelVersion:    v2.6.22
Contact:    linux-wireless@vger.kernel.org,
Description:     The rfkill class subsystem folder.
        Each registered rfkill driver is represented by an rfkillX
        subfolder (X being an integer >= 0).


What:        /sys/class/rfkill/rfkill[0-9]+/name
Date:        09-Jul-2007
KernelVersion    v2.6.22
Contact:    linux-wireless@vger.kernel.org
Description:     Name assigned by driver to this key (interface or driver name).
Values:     arbitrary string.


What:         /sys/class/rfkill/rfkill[0-9]+/type
Date:        09-Jul-2007
KernelVersion    v2.6.22
Contact:    linux-wireless@vger.kernel.org
Description:     Driver type string ("wlan", "bluetooth", etc).
Values:     See include/linux/rfkill.h.


What:        /sys/class/rfkill/rfkill[0-9]+/persistent
Date:        09-Jul-2007
KernelVersion    v2.6.22
Contact:    linux-wireless@vger.kernel.org
Description:     Whether the soft blocked state is initialised from non-volatile
        storage at startup.
Values:     A numeric value:

        - 0: false
        - 1: true


What:        /sys/class/rfkill/rfkill[0-9]+/state
Date:        09-Jul-2007
KernelVersion    v2.6.22
Contact:    linux-wireless@vger.kernel.org
Description:     Current state of the transmitter.
        This file was scheduled to be removed in 2014, but due to its
        large number of users it will be sticking around for a bit
        longer. Despite it being marked as stable, the newer "hard" and
        "soft" interfaces should be preferred, since it is not possible
        to express the 'soft and hard block' state of the rfkill driver
        through this interface. There will likely be another attempt to
        remove it in the future.
Values:     A numeric value.

        0: RFKILL_STATE_SOFT_BLOCKED
            transmitter is turned off by software
        1: RFKILL_STATE_UNBLOCKED
            transmitter is (potentially) active
        2: RFKILL_STATE_HARD_BLOCKED
            transmitter is forced off by something outside of
            the driver's control.


What:        /sys/class/rfkill/rfkill[0-9]+/hard
Date:        12-March-2010
KernelVersion    v2.6.34
Contact:    linux-wireless@vger.kernel.org
Description:     Current hardblock state. This file is read only.
Values:     A numeric value.

        0: inactive
            The transmitter is (potentially) active.
        1: active
            The transmitter is forced off by something outside of
            the driver's control.


What:        /sys/class/rfkill/rfkill[0-9]+/soft
Date:        12-March-2010
KernelVersion    v2.6.34
Contact:    linux-wireless@vger.kernel.org
Description:    Current softblock state. This file is read and write.
Values:     A numeric value.

        0: inactive
            The transmitter is (potentially) active.

        1: active
            The transmitter is turned off by software.