ldisc: new dcd_change() method for line disciplines

[mv-sheeva.git] / Documentation / serial / tty.txt

diff --git a/Documentation/serial/tty.txt b/Documentation/serial/tty.txt
index 5e5349a4fcd281b2450415d7d668456aedd34b4b..7c900507279f97ad6e7da100082f44feefb53992 100644 (file)
--- 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