UART serial port missing on IMX8QM

[Lincoln_Dessen]

Hi all,

 After I add two more pin configs in `arch/arm64/boot/dts/freescale/fsl-imx8qm-mek.dtsi` file:

uart3 serial port ttyLP3 is missing in /dev:

# dmesg | grep tty:

 ttyLP3 only shows up If I remove GPIO0_IO03 and GPIO0_IO04 configs. 

Is there something wrong with my gpio setting in dts file? 

[Lincoln_Dessen · Accepted solution]

It seems the cause is I configure the same pin twice on different places.