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rfkill: add default global states (v2)

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Add a second set of global states, "rfkill_default_states", to track the
state that will be used when the first rfkill class of a given type is
registered, and also to save "undo" information when rfkill_epo is called.

Add a new exported function, rfkill_set_default(), which can be used by
platform drivers to restore radio state saved by the platform across
reboots or shutdown.

Also, fix rfkill_epo to properly update rfkill_states, but still preserve a
copy of the state so that we can undo the effect of rfkill_epo later if we
want to.  Add rfkill_restore_states() to restore rfkill_states from the
copy.

Signed-off-by: Henrique de Moraes Holschuh <hmh@hmh.eng.br>
Acked-by: Ivo van Doorn <IvDoorn@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Henrique de Moraes Holschuh 2008-08-02 15:10:58 -03:00 • committed by John W. Linville
parent 02589f6051
commit 9961920199
3 changed files with 117 additions and 12 deletions
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1
include/linux/rfkill.h
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@ -116,6 +116,7 @@ int rfkill_register(struct rfkill *rfkill);
void rfkill_unregister(struct rfkill *rfkill);
int rfkill_force_state(struct rfkill *rfkill, enum rfkill_state state);
int rfkill_set_default(enum rfkill_type type, enum rfkill_state state);
/**
* rfkill_state_complement - return complementar state