ARM: dts: stm32mp1: add pull-up on serial rx of console connected to STLINK
Avoid U-Boot auto-boot interruption for line break detection
on console when the RX line connected to STLINK is floating
(-IO error in getc cause by framing error and testc return 1)
Same workaround is applied on all the STMicroelectonics board.
Signed-off-by: Patrick Delaunay <patrick.delaunay@st.com>
diff --git a/arch/arm/dts/stm32mp157a-dk1-u-boot.dtsi b/arch/arm/dts/stm32mp157a-dk1-u-boot.dtsi
index 2a1cfd3..dcaab3e 100644
--- a/arch/arm/dts/stm32mp157a-dk1-u-boot.dtsi
+++ b/arch/arm/dts/stm32mp157a-dk1-u-boot.dtsi
@@ -189,6 +189,8 @@
};
pins2 {
u-boot,dm-pre-reloc;
+ /* pull-up on rx to avoid floating level */
+ bias-pull-up;
};
};