On 3/7/22 13:38, Eugen Hristev wrote:
> Flexcom3 is used as board console serial. There are no pull-ups on these
> lines on the board. This means that if a cable is not connected (that has
> pull-ups included), stray characters could appear on the console as the
> floating pins voltage levels are interpreted as incoming characters.
> To avoid this problem, enable the internal pull-ups on these lines.
>
> Signed-off-by: Eugen Hristev <eugen.hristev@xxxxxxxxxxxxx>
Reviewed-by: Tudor Ambarus <tudor.ambarus@xxxxxxxxxxxxx>
> ---
> arch/arm/boot/dts/at91-sama7g5ek.dts | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/arch/arm/boot/dts/at91-sama7g5ek.dts b/arch/arm/boot/dts/at91-sama7g5ek.dts
> index 08685a10eda1d..dd047a8523907 100644
> --- a/arch/arm/boot/dts/at91-sama7g5ek.dts
> +++ b/arch/arm/boot/dts/at91-sama7g5ek.dts
> @@ -495,7 +495,7 @@ pinctrl_flx0_default: flx0_default {
> pinctrl_flx3_default: flx3_default {
> pinmux = <PIN_PD16__FLEXCOM3_IO0>,
> <PIN_PD17__FLEXCOM3_IO1>;
> - bias-disable;
> + bias-pull-up;
> };
>
> pinctrl_flx4_default: flx4_default {
