From 29dfa20e9847b7857a730443a4497c1c6de580a2 Mon Sep 17 00:00:00 2001 From: Heinrich Toews Date: Thu, 11 Jun 2026 10:36:05 +0200 Subject: [PATCH] arm64: dts: ti: Move default UART4 RTS GPIO to common board DTSI When an interaction overlay is loaded after a base overlay, its inclusion of k3-am623-pfc-rs485.dtsi overrides the baseboard-specific UART4 rts-gpios config back to GPIO0_38. Moving the default rts-gpios to the base common DTSI prevents this override, letting the active baseboard overlay (like p0004224 which uses GPIO0_37) cleanly configure its specific RTS routing. Signed-off-by: Heinrich Toews --- arch/arm64/boot/dts/ti/k3-am623-pfc-750-8xxx-common.dtsi | 1 + arch/arm64/boot/dts/ti/k3-am623-pfc-rs485.dtsi | 1 - 2 files changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/arm64/boot/dts/ti/k3-am623-pfc-750-8xxx-common.dtsi b/arch/arm64/boot/dts/ti/k3-am623-pfc-750-8xxx-common.dtsi index 2e807ffbf082..663e84e979c2 100644 --- a/arch/arm64/boot/dts/ti/k3-am623-pfc-750-8xxx-common.dtsi +++ b/arch/arm64/boot/dts/ti/k3-am623-pfc-750-8xxx-common.dtsi @@ -286,6 +286,7 @@ status = "okay"; pinctrl-names = "default"; pinctrl-0 = <&main_uart4_pins_default>; + rts-gpios = <&main_gpio0 38 GPIO_ACTIVE_HIGH>; }; &main_i2c0 { /* type label */ diff --git a/arch/arm64/boot/dts/ti/k3-am623-pfc-rs485.dtsi b/arch/arm64/boot/dts/ti/k3-am623-pfc-rs485.dtsi index d39a701c3e35..adb71b808038 100644 --- a/arch/arm64/boot/dts/ti/k3-am623-pfc-rs485.dtsi +++ b/arch/arm64/boot/dts/ti/k3-am623-pfc-rs485.dtsi @@ -32,7 +32,6 @@ }; &main_uart4 { /* RS485 Interface */ - rts-gpios = <&main_gpio0 38 GPIO_ACTIVE_HIGH>; /* RS485 termination is controlled via GPIO userspace tools */ rs485-rts-active-high; linux,rs485-enabled-at-boot-time;