From 5dc68b07e75d4695a554b60135d70f1847885bd2 Mon Sep 17 00:00:00 2001 From: Eugen Hristev Date: Thu, 28 Jan 2021 10:14:11 +0200 Subject: 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 --- arch/arm/dts/sama7g5ek.dts | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) 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 = , ; - bias-disable; + bias-pull-up; }; pinctrl_sdmmc0_cmd_data_default: sdmmc0_cmd_data_default { -- cgit v1.2.1