How to chang pinmux of Orin(t234)?

Autonomous Machines Jetson & Embedded Systems Jetson AGX Orin
1

We’ve got the orin pinmux excel file from download center, and want to change CAN Bus pins configuration.

according to the Developer Guide Pinmux Changes

there is only “Linux_for_Tegra/kernel/pinmux/t19x”, buf not for t234. then use t19x for orin or where can i get the pinmux script for t234(orin)?

3

There is no such script because Orin’s pinmux setting is using dtsi file.

4

thanks for reply.
is there some docs or notes about change pinmux dtsi of Orin?

5

No document yet. But the pinmux dts is just under Linux_for_Tegra/bootloader.

6

Linux_for_Tegra/bootloader/tegra234-mb1-bct-pinmux-p3701-0000.dtsi
Linux_for_Tegra/bootloader/t186ref/BCT/tegra234-mb1-bct-pinmux-p3701-0000-a04.dtsi

which one should i modify?

7

The first one is actually the copy for the second one.

8

just like below diff file shows, they have many differences. so which one should i select to change?
pinmux.diff (4.9 KB)四

9

Oh ok. Then I don’t know either.

You can just flash the board once and see the log to tell which one is in use.

10

Linux_for_Tegra/bootloader/tegra234-mb1-bct-pinmux-p3701-0000.dtsi

after flash.sh, the above file be recovered, from below file flash.log, can’t find out the map of the dtsi file.
please help to have a check, thanks.

flash.log (451.0 KB)

11

Why?

The first search result of “pinmux” directly gives this.

copying pinmux_config(/media/jaloo/4b30e570-5953-4e3f-bd28-3daec93ead76/jetpack_5.0/downloads/drivers/Linux_for_Tegra/bootloader/t186ref/BCT/tegra234-mb1-bct-pinmux-p3701-0000.dtsi)… done.

12

maybe that is copy result, but there isn’t copy source

13

Could you share what is under your t186ref/BCT/?

I can see that file under my jetpack folder.

14

bootloader_t186ref_BCT.txt (2.9 KB)

15 
tegra234-mb1-bct-gpioint-p3701-0000.dts
tegra234-mb1-bct-misc-p3701-0000.dts
tegra234-mb1-bct-padvoltage-p3701-0000-a04.dtsi
tegra234-mb1-bct-padvoltage-p3701-0000.dtsi
tegra234-mb1-bct-pinmux-p3701-0000-a04.dtsi
tegra234-mb1-bct-pinmux-p3701-0000-a04.dtsi.bak
tegra234-mb1-bct-pinmux-p3701-0000.dtsi -> ?????
tegra234-mb1-bct-pmic-p3701-0000.dts
tegra234-mb1-bct-prod-p3701-0000.dts
tegra234-mb1-bct-ratchet-p3701-0000.dts
tegra234-mb1-bct-reset-p3701-0000.dts
tegra234-mb1-bct-uphy-lanes-p3701-0000.dts
16

you mean the source file is
bootloader/t186ref/BCT/tegra234-mb1-bct-pinmux-p3701-0000.dtsi

can be copied to
bootloader/tegra234-mb1-bct-pinmux-p3701-0000.dtsi

so i should modify the file
bootloader/t186ref/BCT/tegra234-mb1-bct-pinmux-p3701-0000.dtsi

OK, thanks, i will try

19

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