diff options
| author | Neeraj Sanjay Kale <neeraj.sanjaykale@nxp.com> | 2023-03-16 22:52:12 +0530 |
|---|---|---|
| committer | Luiz Augusto von Dentz <luiz.von.dentz@intel.com> | 2023-04-23 21:51:25 -0700 |
| commit | 8eaf839e4ac4feadf06e03eeff34059795450712 (patch) | |
| tree | b89e0251403aca48e670d30bf87295d8eee56596 /drivers/tty/serdev/core.c | |
| parent | 29f93a687f3c435e94d026ee1fc8ad18ce56b7fb (diff) | |
| download | linux-8eaf839e4ac4feadf06e03eeff34059795450712.tar.gz linux-8eaf839e4ac4feadf06e03eeff34059795450712.tar.bz2 linux-8eaf839e4ac4feadf06e03eeff34059795450712.zip | |
serdev: Add method to assert break signal over tty UART port
Adds serdev_device_break_ctl() and an implementation for ttyport.
This function simply calls the break_ctl in tty layer, which can
assert a break signal over UART-TX line, if the tty and the
underlying platform and UART peripheral supports this operation.
Signed-off-by: Neeraj Sanjay Kale <neeraj.sanjaykale@nxp.com>
Reviewed-by: Simon Horman <simon.horman@corigine.com>
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
Diffstat (limited to 'drivers/tty/serdev/core.c')
| -rw-r--r-- | drivers/tty/serdev/core.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/drivers/tty/serdev/core.c b/drivers/tty/serdev/core.c index 078fe64625cb..e7d663901c07 100644 --- a/drivers/tty/serdev/core.c +++ b/drivers/tty/serdev/core.c @@ -405,6 +405,17 @@ int serdev_device_set_tiocm(struct serdev_device *serdev, int set, int clear) } EXPORT_SYMBOL_GPL(serdev_device_set_tiocm); +int serdev_device_break_ctl(struct serdev_device *serdev, int break_state) +{ + struct serdev_controller *ctrl = serdev->ctrl; + + if (!ctrl || !ctrl->ops->break_ctl) + return -EOPNOTSUPP; + + return ctrl->ops->break_ctl(ctrl, break_state); +} +EXPORT_SYMBOL_GPL(serdev_device_break_ctl); + static int serdev_drv_probe(struct device *dev) { const struct serdev_device_driver *sdrv = to_serdev_device_driver(dev->driver); |