According to Documentation/devicetree/bindings/serial/rs485.txt the rs485-rts-delay parameter is required. To prepare making use of of_get_rs485_mode which is strict here, add this property to all imx compatible devices that make use of one of the optional properties. Signed-off-by: Uwe Kleine-König <u.kleine-koenig@xxxxxxxxxxxxxx> --- Cc: Shawn Guo <shawnguo@xxxxxxxxxx> Cc: Fabio Estevam <fabio.estevam@xxxxxxx> arch/arm/boot/dts/imx6qdl-zii-rdu2.dtsi | 1 + 1 file changed, 1 insertion(+) diff --git a/arch/arm/boot/dts/imx6qdl-zii-rdu2.dtsi b/arch/arm/boot/dts/imx6qdl-zii-rdu2.dtsi index 5d94b5ee6aa0..669bb8446574 100644 --- a/arch/arm/boot/dts/imx6qdl-zii-rdu2.dtsi +++ b/arch/arm/boot/dts/imx6qdl-zii-rdu2.dtsi @@ -288,6 +288,7 @@ pinctrl-names = "default"; pinctrl-0 = <&pinctrl_uart3>; uart-has-rtscts; + rs485-rts-delay = <0 0>; linux,rs485-enabled-at-boot-time; status = "okay"; }; -- 2.11.0 -- To unsubscribe from this list: send the line "unsubscribe linux-serial" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html