about serial port pin H12,G12.

The serial port uart0(H12,G12) isn’t work. we use the nvidia’s base board,and the dts about serial port is the same to nvidia. The uart3(H9,H10), uart1(D9,D10), uart2(B16,B15) all ok.

  We found a check(test ?) point at U8,which is in the "P2597_C02_OrCAD_schematics.pdf", at page15,  B3(COM1) . The pin always be low.

  And,I use "Jetson-TX2-Generic-Customer-Pinmux-Template.excel" to set  H12 to GPIO3_PT_00(GPIO464), set G12 to GPIO3_PT_01(GPIO465). After enter ubuntu,I set these two pins to 1,but we use Oscilloscope to test it,there are always be low.

  May be I missed something?

hello XuXiang,

could you please have a try by using linux commands to pull-up GPIO pins,
you should also check Tegra Linux Driver Package TX2 Adaptation Guide for GPIO number calculation.
for example, to set GPIO220 pin values.

cd /sys/class/gpio/
echo 220 > export
echo 1 > value