diff options
| author | Alan Cox <alan@lxorguk.ukuu.org.uk> | 2007-11-28 16:21:28 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-11-29 09:24:52 -0800 |
| commit | 3ac40b9b5e62528d407e0e780b65c21c0247bc7c (patch) | |
| tree | d5c89dc4ecad4943e67c1731a8131e3ebf3b9255 | |
| parent | 05a462afe80553550bc77afc724ce60b42ad587e (diff) | |
termios: document callback more clearly
Signed-off-by: Alan Cox <alan@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| -rw-r--r-- | Documentation/tty.txt | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/Documentation/tty.txt b/Documentation/tty.txt index 048a8762cfb..8e65c4498c5 100644 --- a/Documentation/tty.txt +++ b/Documentation/tty.txt @@ -132,6 +132,14 @@ set_termios() Notify the tty driver that the device's termios tty->termios. Previous settings should be passed in the "old" argument. + The API is defined such that the driver should return + the actual modes selected. This means that the + driver function is responsible for modifying any + bits in the request it cannot fulfill to indicate + the actual modes being used. A device with no + hardware capability for change (eg a USB dongle or + virtual port) can provide NULL for this method. + throttle() Notify the tty driver that input buffers for the line discipline are close to full, and it should somehow signal that no more characters should be |