In AGX orin PA.01 (gpio-349) not able to export

In AGX Orin port PA.01 (gpio-349) not able to export. Throwing
“write error: Device or resource busy” error.

-------sudo cat /sys/kernel/debug/gpio------
gpio-349 (PA.01 |fixed-regulators:reg) out hi

------Excel sheet Configuration as below.-----
A59 GPIO05 DAP6_DOUT GP203_DAP6_DOUT GPIO3_PA.01 Output Drive 1
-----------error log below--------------------
nvidia@nvidia-desktop:~$ sudo echo 349 > /sys/class/gpio/export
echo: write error: Device or resource busy

Please can you guide what could be reason ?

One observation this GPIO is high during boot , once complete voltage level become 0.

Your topic was posted in the wrong category. I am moving this to the Jetson AGX Orin category for visibility.

hello vardhaman,

this failure usually caused by the pin has occupied.
please review the pinmux spreadsheets for the default configurations, thanks

Hi @JerryChang , I have Configured as below. ( pinmux excel sheet not able to add so entire row copied below)
Behavior is same. How to make simple GPIO ?

A59 GPIO05 DAP6_DOUT GP203_DAP6_DOUT B O I2S6 RSVD1 RSVD2 RSVD3 RSVD1 dap6_dout_pa1 vddio_g5 DAP6 G5 ST BDPGLP_MFCR90_VXVDP1P1P1 50k pd GPIO3_PA.01 Output Int PU N/A Disable PCIe 12V Powe Enable GPIO: PCIE_12V_EN_N

Hi @JerryChang
If i connect X8 PCI , This GPIO is high even after boot complete.
My requirement is without X8 PCI , it should be high . This GPIO3_PA.01 GPIO , i have used for other GPIO purpose.
Any input on this ?


Resource busy means this pin is occupied by other driver. In this case, it is occupied by regulator framework.

→ p3737_vdd_12v_pcie


If you are sure your board design won’t use these pcie, then please remove it.

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