On Fri, Mar 10, 2023 at 11:49:19PM +0530, Neeraj Sanjay Kale wrote:
> 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@xxxxxxx>
> ---
> v3: Add details to the commit message. (Greg KH)
...
> 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
...
> @@ -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;
Is the use of -EOPNOTSUPP intentional here?
I see -ENOTSUPP is used elsewhere in this file.
> +}
> static inline int serdev_device_write(struct serdev_device *sdev, const unsigned char *buf,
> size_t count, unsigned long timeout)
> {
> --
> 2.34.1
>
