tty_port: Add a port level carrier detect operation
authorAlan Cox <alan@redhat.com>
Fri, 2 Jan 2009 13:45:05 +0000 (13:45 +0000)
committerLinus Torvalds <torvalds@linux-foundation.org>
Fri, 2 Jan 2009 18:19:38 +0000 (10:19 -0800)
This is the first step to generalising the various pieces of waiting logic
duplicated in all sorts of serial drivers.

Signed-off-by: Alan Cox <alan@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

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