[PATCH v1 2/2] ARM: dts: at91: gardena-smart-gateway: Use DMA for USART3

[Nicolas Ferre]

On 02/01/2024 at 17:18, ezra at easyb.ch wrote:
> From: Ezra Buehler <ezra.buehler at husqvarnagroup.com>
> 
> The AT91SAM9G25-based GARDENA smart Gateway uses USART3 (ttyS1) to
> communicate (over PPP, at 115200 baud) with the radio module.
> 
> We have been experiencing packet loss and seeing errors on the ppp0
> interface. Enabling DMA for the serial interface resolves the issues.
> 
> Co-Developed-by: Michael Zimmermann <michael.zimmermann at grandcentrix.net>
> Signed-off-by: Michael Zimmermann <michael.zimmermann at grandcentrix.net>
> Signed-off-by: Ezra Buehler <ezra.buehler at husqvarnagroup.com>

Acked-by: Nicolas Ferre <nicolas.ferre at microchip.com>
Thanks!

Best regards,
   Nicolas

> ---
>   .../boot/dts/microchip/at91sam9g25-gardena-smart-gateway.dts    | 2 ++
>   1 file changed, 2 insertions(+)
> 
> diff --git a/arch/arm/boot/dts/microchip/at91sam9g25-gardena-smart-gateway.dts b/arch/arm/boot/dts/microchip/at91sam9g25-gardena-smart-gateway.dts
> index 92f2c05c873f..af70eb8a3a02 100644
> --- a/arch/arm/boot/dts/microchip/at91sam9g25-gardena-smart-gateway.dts
> +++ b/arch/arm/boot/dts/microchip/at91sam9g25-gardena-smart-gateway.dts
> @@ -121,6 +121,8 @@ &usart2 {
>   };
> 
>   &usart3 {
> +       atmel,use-dma-rx;
> +       atmel,use-dma-tx;
>          status = "okay";
> 
>          pinctrl-0 = <&pinctrl_usart3
> --
> 2.39.2
>