path: root/Documentation/serial
diff options
authorRodolfo Giometti <>2010-03-10 15:23:45 -0800
committerLinus Torvalds <>2010-03-12 15:52:43 -0800
commitb3e63afe8a74c0134d05a551cc74facc3b3ec0d7 (patch)
tree7b20af342a2c9ff31bd202e81075fab22cc2a282 /Documentation/serial
parent697fb85fcf21b5229a3072440222d14b05ef2abe (diff)
ldisc: new dcd_change() method for line disciplines
Signed-off-by: Rodolfo Giometti <> Cc: David Woodhouse <> Cc: Greg KH <> Cc: Alan Cox <> Cc: Alexander Gordeev <> Signed-off-by: Andrew Morton <> Signed-off-by: Linus Torvalds <>
Diffstat (limited to 'Documentation/serial')
1 files changed, 4 insertions, 0 deletions
diff --git a/Documentation/serial/tty.txt b/Documentation/serial/tty.txt
index 5e5349a4fcd2..7c900507279f 100644
--- a/Documentation/serial/tty.txt
+++ b/Documentation/serial/tty.txt
@@ -105,6 +105,10 @@ write_wakeup() - May be called at any point between open and close.
is permitted to call the driver write method from
this function. In such a situation defer it.
+dcd_change() - Report to the tty line the current DCD pin status
+ changes and the relative timestamp. The timestamp
+ can be NULL.
Driver Access