[PATCH v2 1/3] serdev: Add method to assert break
From: Neeraj Sanjay Kale <neeraj.sanjaykale@nxp.com>
Date: 2023-01-30 18:06:35
Also in:
linux-bluetooth, linux-devicetree, linux-serial, lkml
Subsystem:
serial device bus, the rest, tty layer and serial drivers · Maintainers:
Rob Herring, Linus Torvalds, Greg Kroah-Hartman, Jiri Slaby
Adds serdev_device_break_ctl() and an implementation for ttyport. Signed-off-by: Neeraj Sanjay Kale <neeraj.sanjaykale@nxp.com> --- drivers/tty/serdev/core.c | 11 +++++++++++ drivers/tty/serdev/serdev-ttyport.c | 12 ++++++++++++ include/linux/serdev.h | 6 ++++++ 3 files changed, 29 insertions(+)
diff --git a/drivers/tty/serdev/core.c b/drivers/tty/serdev/core.c
index 0180e1e4e75d..26321ad7e71d 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 -ENOTSUPP; + + 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);
diff --git a/drivers/tty/serdev/serdev-ttyport.c b/drivers/tty/serdev/serdev-ttyport.c
index d367803e2044..847b1f71ab73 100644
--- a/drivers/tty/serdev/serdev-ttyport.c
+++ b/drivers/tty/serdev/serdev-ttyport.c@@ -247,6 +247,17 @@ static int ttyport_set_tiocm(struct serdev_controller *ctrl, unsigned int set, u return tty->ops->tiocmset(tty, set, clear); } +static int ttyport_break_ctl(struct serdev_controller *ctrl, unsigned int break_state) +{ + struct serport *serport = serdev_controller_get_drvdata(ctrl); + struct tty_struct *tty = serport->tty; + + if (!tty->ops->break_ctl) + return -ENOTSUPP; + + return tty->ops->break_ctl(tty, break_state); +} + static const struct serdev_controller_ops ctrl_ops = { .write_buf = ttyport_write_buf, .write_flush = ttyport_write_flush,
@@ -259,6 +270,7 @@ static const struct serdev_controller_ops ctrl_ops = { .wait_until_sent = ttyport_wait_until_sent, .get_tiocm = ttyport_get_tiocm, .set_tiocm = ttyport_set_tiocm, + .break_ctl = ttyport_break_ctl, }; struct device *serdev_tty_port_register(struct tty_port *port,
diff --git a/include/linux/serdev.h b/include/linux/serdev.h
index 66f624fc618c..01b5b8f308cb 100644
--- a/include/linux/serdev.h
+++ b/include/linux/serdev.h@@ -92,6 +92,7 @@ struct serdev_controller_ops { void (*wait_until_sent)(struct serdev_controller *, long); int (*get_tiocm)(struct serdev_controller *); int (*set_tiocm)(struct serdev_controller *, unsigned int, unsigned int); + int (*break_ctl)(struct serdev_controller *, unsigned int); }; /**
@@ -202,6 +203,7 @@ int serdev_device_write_buf(struct serdev_device *, const unsigned char *, size_ void serdev_device_wait_until_sent(struct serdev_device *, long); int serdev_device_get_tiocm(struct serdev_device *); int serdev_device_set_tiocm(struct serdev_device *, int, int); +int serdev_device_break_ctl(struct serdev_device *, int); void serdev_device_write_wakeup(struct serdev_device *); int serdev_device_write(struct serdev_device *, const unsigned char *, size_t, long); void serdev_device_write_flush(struct serdev_device *);
@@ -255,6 +257,10 @@ static inline int serdev_device_set_tiocm(struct serdev_device *serdev, int set, { return -ENOTSUPP; } +static inline int serdev_device_break_ctl(struct serdev_device *serdev, int break_state) +{ + return -ENOTSUPP; +} static inline int serdev_device_write(struct serdev_device *sdev, const unsigned char *buf, size_t count, unsigned long timeout) {
--
2.34.1