Ignore received characters when CREAD is cleared by adding RXRDY
to ignore_status_mask.

This replaces an existing TODO in the driver.

Tested on hardware.

Signed-off-by: Rakesh Alasyam <alasyamrakesh77@gmail.com>

---

v2:
- Add blank line before comment
- Tested on hardware
---
 drivers/tty/serial/atmel_serial.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/tty/serial/atmel_serial.c b/drivers/tty/serial/atmel_serial.c
index 5d8c1cfc1c60..5c756dc904b0 100644
--- a/drivers/tty/serial/atmel_serial.c
+++ b/drivers/tty/serial/atmel_serial.c
@@ -2184,7 +2184,8 @@ static void atmel_set_termios(struct uart_port *port,
 		if (termios->c_iflag & IGNPAR)
 			port->ignore_status_mask |= ATMEL_US_OVRE;
 	}
-	/* TODO: Ignore all characters if CREAD is set.*/
+	if (!(termios->c_cflag & CREAD))
+		port->ignore_status_mask |= ATMEL_US_RXRDY;
 
 	/* update the per-port timeout */
 	uart_update_timeout(port, termios->c_cflag, baud);
-- 
2.43.0

Hi Rakesh,

Le 11/05/2026 à 18:59, Rakesh Alasyam a écrit :
> Ignore received characters when CREAD is cleared by adding RXRDY
> to ignore_status_mask.
> 
> This replaces an existing TODO in the driver.
> 
> Tested on hardware.
Could you be more precise?
Which board(s) did you test with? (e.g. sama5d3_explained, custom...)
Which SoC? (sam9g35, sama5d2...)
With DMA, PDC or none?

Regards,
Richard
> 
> Signed-off-by: Rakesh Alasyam <alasyamrakesh77@gmail.com>
> 
> ---
> 
> v2:
> - Add blank line before comment
> - Tested on hardware
> ---
>   drivers/tty/serial/atmel_serial.c | 3 ++-
>   1 file changed, 2 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/tty/serial/atmel_serial.c b/drivers/tty/serial/atmel_serial.c
> index 5d8c1cfc1c60..5c756dc904b0 100644
> --- a/drivers/tty/serial/atmel_serial.c
> +++ b/drivers/tty/serial/atmel_serial.c
> @@ -2184,7 +2184,8 @@ static void atmel_set_termios(struct uart_port *port,
>   		if (termios->c_iflag & IGNPAR)
>   			port->ignore_status_mask |= ATMEL_US_OVRE;
>   	}
> -	/* TODO: Ignore all characters if CREAD is set.*/
> +	if (!(termios->c_cflag & CREAD))
> +		port->ignore_status_mask |= ATMEL_US_RXRDY;
>   
>   	/* update the per-port timeout */
>   	uart_update_timeout(port, termios->c_cflag, baud);