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| author | Neeraj Sanjay Kale <neeraj.sanjaykale@nxp.com> | 2023-03-16 20:22:12 +0300 |
|---|---|---|
| committer | Luiz Augusto von Dentz <luiz.von.dentz@intel.com> | 2023-04-24 07:51:25 +0300 |
| commit | 8eaf839e4ac4feadf06e03eeff34059795450712 (patch) | |
| tree | b89e0251403aca48e670d30bf87295d8eee56596 /include/linux/serdev.h | |
| parent | 29f93a687f3c435e94d026ee1fc8ad18ce56b7fb (diff) | |
| download | linux-8eaf839e4ac4feadf06e03eeff34059795450712.tar.xz | |
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 '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 babedb13785b..f5f97fa25e8a 100644 --- a/include/linux/serdev.h +++ b/include/linux/serdev.h @@ -93,6 +93,7 @@ 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); }; /** @@ -203,6 +204,7 @@ 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 *); @@ -256,6 +258,10 @@ static inline int serdev_device_set_tiocm(struct serdev_device *serdev, int set, { return -EOPNOTSUPP; } +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) { |