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| author | Eugen Hristev <eugen.hristev@microchip.com> | 2021-01-28 10:14:11 +0200 |
|---|---|---|
| committer | Eugen Hristev <eugen.hristev@microchip.com> | 2021-02-11 09:26:40 +0200 |
| commit | 5dc68b07e75d4695a554b60135d70f1847885bd2 (patch) | |
| tree | 902c6efbdec67a36fdb4769afb80bfba74357fe7 | |
| parent | c7182c02cefb11431a79a8abb4d8a821e4a478b5 (diff) | |
| download | u-boot-5dc68b07e75d4695a554b60135d70f1847885bd2.tar.gz u-boot-5dc68b07e75d4695a554b60135d70f1847885bd2.tar.xz u-boot-5dc68b07e75d4695a554b60135d70f1847885bd2.zip | |
ARM: dts: at91: sama7g5ek: enable pull-up for serial debug line
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>
| -rw-r--r-- | arch/arm/dts/sama7g5ek.dts | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/arm/dts/sama7g5ek.dts b/arch/arm/dts/sama7g5ek.dts index ff9c9eb45c..3a4fdd38a5 100644 --- a/arch/arm/dts/sama7g5ek.dts +++ b/arch/arm/dts/sama7g5ek.dts @@ -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 { |