[PATCH] ARM: dts: stm32: Pull UART4 RX high on AV96

[Marek Vasut]

There is no dedicated pull resistor on the AV96 UART4 (console UART)
pin. In case there is no UART adapter installed on the AV96, the line
is floating and can trigger reception of garbage characters, which in
turn can abort U-Boot autoboot. Add default pull up to mitigate this
problem.

Signed-off-by: Marek Vasut <marex at denx.de>
Cc: Patrick Delaunay <patrick.delaunay at st.com>
Cc: Patrice Chotard <patrice.chotard at st.com>
---
 arch/arm/dts/stm32mp15xx-dhcor-avenger96-u-boot.dtsi | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/arm/dts/stm32mp15xx-dhcor-avenger96-u-boot.dtsi b/arch/arm/dts/stm32mp15xx-dhcor-avenger96-u-boot.dtsi
index cb92fc9c14..1ae57e1854 100644
--- a/arch/arm/dts/stm32mp15xx-dhcor-avenger96-u-boot.dtsi
+++ b/arch/arm/dts/stm32mp15xx-dhcor-avenger96-u-boot.dtsi
@@ -75,6 +75,8 @@
 	};
 	pins2 {
 		u-boot,dm-pre-reloc;
+		/delete-property/ bias-disable;
+		bias-pull-up;
 	};
 };
 
-- 
2.28.0