The Pinmux modifications are not reflected in the Orin development kit

Hello Team,

Here are the environment details for the Jetson AGX Orin development kit that I’m using.
JetPack version: 5.0.2
L4T Kernel: R35.1
Pinmux sheet downloaded from the Nvidia download center for Orin.

So, before approaching you, I attempted to modify the Pinmux settings based on my prior expertise.

  1. Changed the GPIO pins to I2S2 pins using the Pinmux spreadsheet. Please see the attached image. The .dtsi file for Pinmux, GPIO, and pad voltage was generated.

  2. I updated the dtsi files that reference this page Linux for Tegra/bootloader/ and Linux for Tegra/bootloader/t186ref/BCT/tegra234-mb1-bct-pinmux-p3701-0000-a04.dtsi and tegra234-mb1-bct-pinmux-p3701-0000.dtsi to change the GPIO pins to I2S2 pins.

  3. Flashed the Orin Dev Kit using the command “sudo./flash.sh jetson-agx-orin-devkit mmcblk0p1”. However, the Orin kit does not reflect the modified pins.

  4. As referred in this page, I replaced those 3 files in the /Linux for Tegra/bootloader folder, but I was unable to flash the Orin dev kit. Please see the attached image.

Please let me know how to update the Pinmux settings on the Orin dev kit. Your suggestions would be very helpful.

Regards,
parashuram

  1. Flashed the Orin Dev Kit using the command “sudo./flash.sh jetson-agx-orin-devkit mmcblk0p1”. However, the Orin kit does not reflect the modified pins.

Have you checked the flash log from above step and confirm your pinmux dtsi file is really getting flashed?

Hello Wayne,

Thank you for your reply.

Please find the attached flash log flash.log (83.3 KB)

I can see that the bootloader file’s. dtsi file was copied. copying pinmux_config(/home/parashuram/nvidia/nvidia_sdk/JetPack_5.0.2_Linux_JETSON_AGX_ORIN_TARGETS/Linux_for_Tegra/bootloader/t186ref/BCT/tegra234-mb1-bct-pinmux-p3701-0000.dtsi)... done.
and also --pinmux_config tegra234-mb1-bct-pinmux-p3701-0000.dtsi --gpioint_config tegra234-mb1-bct-gpioint-p3701-0000.dts

Reagrds,
Parashuram

What is your method to tell “pinmux does not take effect on my device”?

Wayne,

To make Pinmux changes, I followed the steps listed below.

  1. Downloaded the Pinmux spreadsheet from the Nvidia download center.

  2. Changed GPIO pins to I2S2 pins in spreadsheet and generated DT files and replaced pinmux dtsi changes in Linux for Tegra/bootloader/t186ref/BCT/tegra234-mb1-bct-pinmux-p3701-0000-a04.dtsi and tegra234-mb1-bct-pinmux-p3701-0000.dtsi.


    removed

  3. replaced GPIO dtsi changes to Linux for Tegra/bootloader/ tegra234-mb1-bct-gpio-p3701-0000.dtsi and tegra234-mb1-bct-gpio-p3701-0000-a04.dtsi.


    Referred this pinmux changes wiki.

Regards,
Parashuram