Add flush function to NS16550 to remove bad characters being printed during reset
Signed-off-by: David Dgien <[email protected]> --- drivers/serial/serial_ns16550.c | 12 ++++++++++++ 1 file changed, 12 insertions(+) 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 _______________________________________________ barebox mailing list [email protected] http://lists.infradead.org/mailman/listinfo/barebox
