On Tue, May 19, 2020 at 11:55:36PM -0400, David Dgien wrote:
> Add flush function to NS16550 to remove bad characters being printed
> during reset
>
> Signed-off-by: David Dgien <dgienda125@xxxxxxxxx>
> ---
> drivers/serial/serial_ns16550.c | 12 ++++++++++++
> 1 file changed, 12 insertions(+)
Applied, thanks
Sascha
>
> diff --git a/drivers/serial/serial_ns16550.c b/drivers/serial/serial_ns16550.c
> index 5d6cec82a..f117ab9dc 100644
> --- a/drivers/serial/serial_ns16550.c
> +++ b/drivers/serial/serial_ns16550.c
> @@ -308,6 +308,17 @@ static int ns16550_tstc(struct console_device *cdev)
> return ((ns16550_read(cdev, lsr) & LSR_DR) != 0);
> }
>
> +/**
> + * @brief Flush remaining characters in serial device
> + *
> + * @param[in] cdev pointer to console device
> + */
> +static void ns16550_flush(struct console_device *cdev)
> +{
> + /* Loop Doing Nothing */
> + while ((ns16550_read(cdev, lsr) & LSR_TEMT) == 0) ;
> +}
> +
> static void ns16550_probe_dt(struct device_d *dev, struct ns16550_priv *priv)
> {
> struct device_node *np = dev->device_node;
> @@ -501,6 +512,7 @@ static int ns16550_probe(struct device_d *dev)
> cdev->putc = ns16550_putc;
> cdev->getc = ns16550_getc;
> cdev->setbrg = ns16550_setbaudrate;
> + cdev->flush = ns16550_flush;
> cdev->linux_console_name = devtype->linux_console_name;
>
> priv->fcrval = FCRVAL;
> --
> 2.26.2
>
>
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