diff options
| author | Jiri Slaby <jslaby@suse.cz> | 2021-06-10 11:02:44 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-06-15 14:03:26 +0200 |
| commit | 654ee49b7e0883e660be6e6e20876fc4cbdaadd1 (patch) | |
| tree | 9e14c689a306e390ec13537316ad3e3166062c43 /include/linux/tty.h | |
| parent | fb524360f52228201b56149a138369da505141a2 (diff) | |
tty: make tty_get_{char,frame}_size available
Many tty drivers contain code to compute bits count depending on termios
cflags. So extract this code from serial core to two separate tty helper
functions:
* tty_get_char_size -- only size of a character, without flags,
* tty_get_frame_size -- complete size of a frame including flags.
In the next patch, calls to these new functions replace many copies of
this code.
Note that we accept only cflag as a parameter. That's because some
callers like pch_uart_startup or sunsab_console_setup don't have at hand
termios which we could pass around.
Cc: Joe Perches <joe@perches.com>
Cc: Johan Hovold <johan@kernel.org>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Link: https://lore.kernel.org/r/20210610090247.2593-1-jslaby@suse.cz
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'include/linux/tty.h')
| -rw-r--r-- | include/linux/tty.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/include/linux/tty.h b/include/linux/tty.h index 4c0c7ca1d9a4..19dc1097e09c 100644 --- a/include/linux/tty.h +++ b/include/linux/tty.h @@ -495,6 +495,9 @@ static inline speed_t tty_get_baud_rate(struct tty_struct *tty) return tty_termios_baud_rate(&tty->termios); } +unsigned char tty_get_char_size(unsigned int cflag); +unsigned char tty_get_frame_size(unsigned int cflag); + extern void tty_termios_copy_hw(struct ktermios *new, struct ktermios *old); extern int tty_termios_hw_change(const struct ktermios *a, const struct ktermios *b); extern int tty_set_termios(struct tty_struct *tty, struct ktermios *kt); |