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| author | Rodolfo Giometti <giometti@linux.it> | 2010-03-11 00:23:45 +0100 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2010-03-13 00:52:43 +0100 |
| commit | b3e63afe8a74c0134d05a551cc74facc3b3ec0d7 (patch) | |
| tree | 7b20af342a2c9ff31bd202e81075fab22cc2a282 | |
| parent | pps: LinuxPPS clients support (diff) | |
| download | linux-b3e63afe8a74c0134d05a551cc74facc3b3ec0d7.tar.xz linux-b3e63afe8a74c0134d05a551cc74facc3b3ec0d7.zip | |
ldisc: new dcd_change() method for line disciplines
Signed-off-by: Rodolfo Giometti <giometti@linux.it>
Cc: David Woodhouse <dwmw2@infradead.org>
Cc: Greg KH <greg@kroah.com>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Cc: Alexander Gordeev <lasaine@lvk.cs.msu.su>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| -rw-r--r-- | Documentation/serial/tty.txt | 4 | ||||
| -rw-r--r-- | include/linux/tty_ldisc.h | 8 |
2 files changed, 12 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 diff --git a/include/linux/tty_ldisc.h b/include/linux/tty_ldisc.h index 0c4ee9b88f85..526d66f066a3 100644 --- a/include/linux/tty_ldisc.h +++ b/include/linux/tty_ldisc.h @@ -99,6 +99,12 @@ * cease I/O to the tty driver. Can sleep. The driver should * seek to perform this action quickly but should wait until * any pending driver I/O is completed. + * + * void (*dcd_change)(struct tty_struct *tty, unsigned int status, + * struct timespec *ts) + * + * Tells the discipline that the DCD pin has changed its status and + * the relative timestamp. Pointer ts can be NULL. */ #include <linux/fs.h> @@ -136,6 +142,8 @@ struct tty_ldisc_ops { void (*receive_buf)(struct tty_struct *, const unsigned char *cp, char *fp, int count); void (*write_wakeup)(struct tty_struct *); + void (*dcd_change)(struct tty_struct *, unsigned int, + struct timespec *); struct module *owner; |