From: Nicolas Ferre <nicolas.ferre@microchip.com>
To: <ezra@easyb.ch>,
Alexandre Belloni <alexandre.belloni@bootlin.com>,
Claudiu Beznea <claudiu.beznea@tuxon.dev>,
Conor Dooley <conor+dt@kernel.org>,
Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>,
Rob Herring <robh+dt@kernel.org>,
<linux-arm-kernel@lists.infradead.org>
Cc: Reto Schneider <reto.schneider@husqvarnagroup.com>,
Michael Zimmermann <michael.zimmermann@grandcentrix.net>,
<devicetree@vger.kernel.org>,
Ezra Buehler <ezra.buehler@husqvarnagroup.com>
Subject: Re: [PATCH v1 2/2] ARM: dts: at91: gardena-smart-gateway: Use DMA for USART3
Date: Wed, 3 Jan 2024 14:47:45 +0100 [thread overview]
Message-ID: <f5db2ae7-fa2d-41d0-a247-928023fb0311@microchip.com> (raw)
In-Reply-To: <20240102161839.702625-3-ezra.buehler@husqvarna.com>
On 02/01/2024 at 17:18, ezra@easyb.ch wrote:
> From: Ezra Buehler <ezra.buehler@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@grandcentrix.net>
> Signed-off-by: Michael Zimmermann <michael.zimmermann@grandcentrix.net>
> Signed-off-by: Ezra Buehler <ezra.buehler@husqvarnagroup.com>
Acked-by: Nicolas Ferre <nicolas.ferre@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
>
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next prev parent reply other threads:[~2024-01-03 13:49 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-01-02 16:18 [PATCH v1 0/2] ARM: dts: at91: gardena-smart-gateway: Use DMA for serial ports ezra
2024-01-02 16:18 ` [PATCH v1 1/2] ARM: dts: at91: at91sam9x5ek: Use DMA for DBGU serial port ezra
2024-01-03 13:47 ` Nicolas Ferre
2024-01-02 16:18 ` [PATCH v1 2/2] ARM: dts: at91: gardena-smart-gateway: Use DMA for USART3 ezra
2024-01-03 13:47 ` Nicolas Ferre [this message]
2024-02-06 6:33 ` [PATCH v1 0/2] ARM: dts: at91: gardena-smart-gateway: Use DMA for serial ports claudiu beznea
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