UART1 is used for connection to the main EPYC CPU. Besides the main TX/RX signals this connection has flow control signals RTS/CTS, therefore configure this pins on the BMC side. Signed-off-by: Konstantin Aladyshev <aladyshev22@xxxxxxxxx> --- arch/arm/boot/dts/aspeed-bmc-amd-ethanolx.dts | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/arch/arm/boot/dts/aspeed-bmc-amd-ethanolx.dts b/arch/arm/boot/dts/aspeed-bmc-amd-ethanolx.dts index 889b2fdd19cf..0354a7d8f9f5 100644 --- a/arch/arm/boot/dts/aspeed-bmc-amd-ethanolx.dts +++ b/arch/arm/boot/dts/aspeed-bmc-amd-ethanolx.dts @@ -79,7 +79,9 @@ &uart1 { status = "okay"; pinctrl-names = "default"; pinctrl-0 = <&pinctrl_txd1_default - &pinctrl_rxd1_default>; + &pinctrl_rxd1_default + &pinctrl_nrts1_default + &pinctrl_ncts1_default>; }; &uart5 { -- 2.25.1