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ARM: dts: at91: sama7g5ek: enable pull-up for serial debug line

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If the serial tx/rx are floating, it can happen that bogus characters
are detected on the line at boot time. This leads to U-boot accidentally
thinking someone pressed a key to stop autoboot, thus stopping booting process.
This can happen if the serial cable is not connected. There are hardware
pull-ups on the board connected to serial cable VBUS.
To solve this when the cable is not plugged, enable internal pull-ups as well
for the tx/rx lines.

Signed-off-by: Eugen Hristev <eugen.hristev@microchip.com>
This commit is contained in:
Eugen Hristev 2021-01-28 10:14:11 +02:00
parent c7182c02ce
commit 5dc68b07e7
1 changed files with 1 additions and 1 deletions
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arch/arm/dts/sama7g5ek.dts
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@ -122,7 +122,7 @@
pinctrl_flx3_default: flx3_default {
pinmux = <PIN_PD16__FLEXCOM3_IO0>,
<PIN_PD17__FLEXCOM3_IO1>;
bias-disable;
bias-pull-up;
};
pinctrl_sdmmc0_cmd_data_default: sdmmc0_cmd_data_default {