/ { aliases { uart1 = &uart1; }; }; &pinctrl { uart_backup: uart_backup { group1 { pinmux = ; // SPI_CLK }; group2 { pinmux = ; // SPI_MOSI input-enable; }; }; }; // Uses spi1 pins. Make sure to disable it &uart1 { current-speed = <115200>; status = "okay"; pinctrl-0 = <&uart_backup>; pinctrl-names = "default"; };