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authorEugen Hristev <eugen.hristev@microchip.com>2021-01-28 10:14:11 +0200
committerEugen Hristev <eugen.hristev@microchip.com>2021-02-11 09:26:40 +0200
commit5dc68b07e75d4695a554b60135d70f1847885bd2 (patch)
tree902c6efbdec67a36fdb4769afb80bfba74357fe7
parentc7182c02cefb11431a79a8abb4d8a821e4a478b5 (diff)
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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.dts2
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 {