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ARM: dts: microchip: at91sam9x5ek: Use DMA for DBGU serial port

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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 <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>
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 <claudiu.beznea@tuxon.dev>
This commit is contained in:
Ezra Buehler 2024-01-02 17:18:38 +01:00 committed by Claudiu Beznea
parent 6613476e22
commit f8f4f44277
1 changed files with 2 additions and 0 deletions
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2
arch/arm/boot/dts/microchip/at91sam9x5ek.dtsi
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@ -39,6 +39,8 @@
};
&dbgu {
atmel,use-dma-rx;
atmel,use-dma-tx;
status = "okay";
};