Messages in this thread Patch in this message | | | From | Rodolfo Giometti <> | Date | Thu, 2 Oct 2008 09:41:44 +0200 | Subject | [PATCH 05/10] ldisc: new dcd_change() method for line disciplines. |
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Signed-off-by: Rodolfo Giometti <giometti@linux.it> --- Documentation/tty.txt | 4 ++++ include/linux/tty_ldisc.h | 8 ++++++++ 2 files changed, 12 insertions(+), 0 deletions(-)
diff --git a/Documentation/tty.txt b/Documentation/tty.txt index 8e65c44..3fc812a 100644 --- a/Documentation/tty.txt +++ b/Documentation/tty.txt @@ -100,6 +100,10 @@ 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 40f38d8..526fbf4 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; -- 1.5.4.3
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