16G Orin NX device, after modify default GPIO value, use which dtsi to get dtb in dir Linux_for_Tegra/bootloader?

Autonomous Machines Jetson & Embedded Systems Jetson Orin NX
1

we use 16G Orin NX device and want to modify some gpio’s default state.

we find that there are many dtsi files in dir: Linux_for_Tegra/bootloader.

please help to tell me we can get dtb with which dtsi file.

thanks

3

Hi lishu2002,

What’s you carrier board for Orin NX?

You could refer to the flash log to know which dtb file is flashed into your board.
Please provide the full flash log for further check.

4

thanks for reply.

Carrier board is not purchased. maybe can be called custom board

5

I compile the kernel and there are some dtb files created.

can i use the output dtb file?
tegra234-p3767-0000-p3509-a02.dtb
or tegra234-p3767-0000-p3768-0000-a0.dtb

6

Please provide the full flash log first to check which dtb is in use.

You could also use pinmux spreadsheet for this use case.

7

thanks for the reply.

  1. use pinmux mean modify the bootloader’s dtsi file and reflash ?
    pinmux file: bootloader/t186ref/BCT/tegra234-mb1-bct-pinmux-p3767-dp-a03.dtsi
  2. we use a sample carrier board to flash it with guide in Quick Start — Jetson Linux Developer Guide documentation.

found out dtb file is tegra234-p3767-0000-p3768-0000-a0.dtb.

8

You could check which dtb in use from flash log.

Please just refer to the following instruction to use pinmux spreadsheet for generating related .dtsi
Jetson Orin NX and Nano Series — Generating the Pinmux dtsi Files

10

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