diff options
| author | Neeraj Sanjay Kale <neeraj.sanjaykale@nxp.com> | 2023-03-16 22:52:12 +0530 |
|---|---|---|
| committer | Marcel Ziswiler <marcel.ziswiler@toradex.com> | 2023-07-25 16:21:10 +0200 |
| commit | 3581b2a6693ccad39e3cbf038fd4651e2ac09447 (patch) | |
| tree | 7b7880a976bbc0b4c6152ee21a8771b3d0f641ab /include/linux/serdev.h | |
| parent | 46d95daf358fc9d83e043525774aff1b66ab4869 (diff) | |
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.
Upstream-Status: Backport [8eaf839e4ac4feadf06e03eeff34059795450712]
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 'include/linux/serdev.h')
| -rw-r--r-- | include/linux/serdev.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/include/linux/serdev.h b/include/linux/serdev.h index 66f624fc618c..c065ef1c82f1 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 *ctrl, unsigned int break_state); }; /** @@ -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 *serdev, int break_state); 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 -EOPNOTSUPP; +} static inline int serdev_device_write(struct serdev_device *sdev, const unsigned char *buf, size_t count, unsigned long timeout) { |