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.delau...@st.com>
---
arch/arm/dts/stm32mp157a-dk1-u-boot.dtsi | 2 ++
arch/arm/dts/stm32mp157c-ed1-u-boot.dtsi | 2 ++
2 files changed, 4 insertions(+)
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;
};
};
diff --git a/arch/arm/dts/stm32mp157c-ed1-u-boot.dtsi
b/arch/arm/dts/stm32mp157c-ed1-u-boot.dtsi
index 200601e..21c89c1 100644
--- a/arch/arm/dts/stm32mp157c-ed1-u-boot.dtsi
+++ b/arch/arm/dts/stm32mp157c-ed1-u-boot.dtsi
@@ -206,5 +206,7 @@
};
pins2 {
u-boot,dm-pre-reloc;
+ /* pull-up on rx to avoid floating level */
+ bias-pull-up;
};
};
--
2.7.4
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