Issue with enabling UARTB serial@3110000 on Orin NX with L4T 36.3

[KevinFFF]

Hi ff4568525153,

@ff4568525153

Here is a question: On J5,UARTB(serial@3110000)is mapped to /dev/ttyTHS1,right?But it seems different for JP6.

Yes, the UART mapping in JP5 and JP6 are different.

@ff4568525153

[ 1.751183] serial-tegra 3110000.serial: failed to get alias id, errno -19

You may need to add them in aliases of your device tree.
Some aliases have been removed by default in device tree. Please add it back for 3110000.serial.

        aliases {
                mmc0 = "/bus@0/mmc@3400000";
                serial0 = "/serial";
                serial1 = "/bus@0/serial@3100000";
                serial2 = "/bus@0/serial@3140000";
+               serial3 = "/bus@0/serial@3110000";

and you should get /dev/ttyTHS3 available to be used for 3110000.serial