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| author | Ulrich Hecht <ulrich.hecht+renesas@gmail.com> | 2018-01-22 18:56:32 +0100 |
|---|---|---|
| committer | Marcel Holtmann <marcel@holtmann.org> | 2018-01-23 09:16:05 +0100 |
| commit | 3a19cfcce105e481b02b14265c5b40c6c10ef60a (patch) | |
| tree | ffd4e503a4e231247334fbfb8cd1c0eaae635e6d /drivers/tty | |
| parent | 8c6b8eda7294775097e0d0eb64cb6f86d460d7c2 (diff) | |
| download | linux-3a19cfcce105e481b02b14265c5b40c6c10ef60a.tar.bz2 | |
serdev: add method to set parity
Adds serdev_device_set_parity() and an implementation for ttyport.
The interface uses an enum with the values SERIAL_PARITY_NONE,
SERIAL_PARITY_EVEN and SERIAL_PARITY_ODD.
Signed-off-by: Ulrich Hecht <ulrich.hecht+renesas@gmail.com>
Reviewed-by: Sebastian Reichel <sebastian.reichel@collabora.co.uk>
Reviewed-by: Johan Hovold <johan@kernel.org>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Diffstat (limited to 'drivers/tty')
| -rw-r--r-- | drivers/tty/serdev/core.c | 12 | ||||
| -rw-r--r-- | drivers/tty/serdev/serdev-ttyport.c | 24 |
2 files changed, 36 insertions, 0 deletions
diff --git a/drivers/tty/serdev/core.c b/drivers/tty/serdev/core.c index 1bef39828ca7..3c573a8caa80 100644 --- a/drivers/tty/serdev/core.c +++ b/drivers/tty/serdev/core.c @@ -225,6 +225,18 @@ void serdev_device_set_flow_control(struct serdev_device *serdev, bool enable) } EXPORT_SYMBOL_GPL(serdev_device_set_flow_control); +int serdev_device_set_parity(struct serdev_device *serdev, + enum serdev_parity parity) +{ + struct serdev_controller *ctrl = serdev->ctrl; + + if (!ctrl || !ctrl->ops->set_parity) + return -ENOTSUPP; + + return ctrl->ops->set_parity(ctrl, parity); +} +EXPORT_SYMBOL_GPL(serdev_device_set_parity); + void serdev_device_wait_until_sent(struct serdev_device *serdev, long timeout) { struct serdev_controller *ctrl = serdev->ctrl; diff --git a/drivers/tty/serdev/serdev-ttyport.c b/drivers/tty/serdev/serdev-ttyport.c index 247788a16f0b..1bdf2959ac5c 100644 --- a/drivers/tty/serdev/serdev-ttyport.c +++ b/drivers/tty/serdev/serdev-ttyport.c @@ -190,6 +190,29 @@ static void ttyport_set_flow_control(struct serdev_controller *ctrl, bool enable tty_set_termios(tty, &ktermios); } +static int ttyport_set_parity(struct serdev_controller *ctrl, + enum serdev_parity parity) +{ + struct serport *serport = serdev_controller_get_drvdata(ctrl); + struct tty_struct *tty = serport->tty; + struct ktermios ktermios = tty->termios; + + ktermios.c_cflag &= ~(PARENB | PARODD | CMSPAR); + if (parity != SERDEV_PARITY_NONE) { + ktermios.c_cflag |= PARENB; + if (parity == SERDEV_PARITY_ODD) + ktermios.c_cflag |= PARODD; + } + + tty_set_termios(tty, &ktermios); + + if ((tty->termios.c_cflag & (PARENB | PARODD | CMSPAR)) != + (ktermios.c_cflag & (PARENB | PARODD | CMSPAR))) + return -EINVAL; + + return 0; +} + static void ttyport_wait_until_sent(struct serdev_controller *ctrl, long timeout) { struct serport *serport = serdev_controller_get_drvdata(ctrl); @@ -227,6 +250,7 @@ static const struct serdev_controller_ops ctrl_ops = { .open = ttyport_open, .close = ttyport_close, .set_flow_control = ttyport_set_flow_control, + .set_parity = ttyport_set_parity, .set_baudrate = ttyport_set_baudrate, .wait_until_sent = ttyport_wait_until_sent, .get_tiocm = ttyport_get_tiocm, |