From f8f4f44277028a41622c9b4ff3ee9fd22ec5d233 Mon Sep 17 00:00:00 2001 From: Ezra Buehler Date: Tue, 2 Jan 2024 17:18:38 +0100 Subject: [PATCH] ARM: dts: microchip: at91sam9x5ek: Use DMA for DBGU serial port The UART controller does not seem to be fast enough to receive data (at 115200 baud) without dropping bytes when DMA is disabled. This has often been noticed when pasting SSH keys into the serial console (ttyS0). Only after multiple tries, the long strings would be successfully transferred without missing characters. Co-developed-by: Michael Zimmermann Signed-off-by: Michael Zimmermann Signed-off-by: Ezra Buehler Acked-by: Nicolas Ferre Link: https://lore.kernel.org/r/20240102161839.702625-2-ezra.buehler@husqvarna.com [claudiu.beznea: s/Co-Developed-by/Co-developed-by to make checkpatch.pl happy, s/at91/microchip in commit title] Signed-off-by: Claudiu Beznea --- arch/arm/boot/dts/microchip/at91sam9x5ek.dtsi | 2 ++ 1 file changed, 2 insertions(+) diff --git a/arch/arm/boot/dts/microchip/at91sam9x5ek.dtsi b/arch/arm/boot/dts/microchip/at91sam9x5ek.dtsi index 5f4eaa618ab47..9618b8d965b0c 100644 --- a/arch/arm/boot/dts/microchip/at91sam9x5ek.dtsi +++ b/arch/arm/boot/dts/microchip/at91sam9x5ek.dtsi @@ -39,6 +39,8 @@ }; &dbgu { + atmel,use-dma-rx; + atmel,use-dma-tx; status = "okay"; }; -- 2.30.2