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rfkill: export persistent attribute in sysfs

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This information allows userspace to implement a hybrid policy where
it can store the rfkill soft-blocked state in platform non-volatile
storage if available, and if not then file-based storage can be used.

Some users prefer platform non-volatile storage because of the behaviour
when dual-booting multiple versions of Linux, or if the rfkill setting
is changed in the BIOS setting screens, or if the BIOS responds to
wireless-toggle hotkeys itself before the relevant platform driver has
been loaded.

Signed-off-by: Alan Jenkins <[email protected]>
Acked-by: Henrique de Moraes Holschuh <[email protected]>
Signed-off-by: John W. Linville <[email protected]>
This commit is contained in:
Alan Jenkins 2009-06-16 14:54:04 +01:00 • committed by John W. Linville
commit 464902e812
3 changed files with 15 additions and 2 deletions
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2
Documentation/rfkill.txt
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@ -111,6 +111,8 @@ following attributes:
name: Name assigned by driver to this key (interface or driver name).
type: Driver type string ("wlan", "bluetooth", etc).
persistent: Whether the soft blocked state is initialised from
non-volatile storage at startup.
state: Current state of the transmitter
0: RFKILL_STATE_SOFT_BLOCKED
transmitter is turned off by software