How to use NC (JAX) GPIO6 (JAO)

[jdiegodelgado]

Hi,
Is there a way to use this signal as a GPIO?

Signal Name: NC (JAX) GPIO6 (JAO)
Description: Camera FRSYNC #3

I just want to use the GPIO6, just to turn it on and off, but I did not find its equivalent in the /sys/kernel/debug/gpio.

Best,

[KevinFFF]

Hi jdiegodelgado,

Are you using the devkit or custom board for AGX Orin

Do you mean the following pin in pinmux spreadsheet?

If yes, please help to share the result of the following command on your board.

$sudo busybox devmem 0x0c303020

[jdiegodelgado]

Hi @KevinFFF ,

Yes, exactly that pin. The board that I’m using is a Jetson Orin AGX devkit.
Please find here the requested output:

$ sudo busybox devmem 0x0c303020
0x0000C406

Best,

[KevinFFF]

What’s your Jetpack version in use?

Could you help to try configuring as GPIO_PAA.04/Output/Drvie 0 as following in pinmux spreadsheet?

and use sysfs to control this pin to verify if it could work.

[jdiegodelgado]

@KevinFFF ,

Thanks for your response! I’m using JetPack 5.1.1.
I enabled the GPIO as you told, but the sensor did not showed in the i2c bus (I’m trying to communicate to a sensor using i2c-tools).

I think that the 2.8V pin is not enabled, I read in the Jetson AGX Xavier and Orin Series Camera Design Guide this:
3.3V & 1.8V are 'always on' power sources, but what about the 2.8V?
Does this power source should be enabled? If so, how can I do that?

Best,

[JerryChang]

here’s 2.8V regulator used by AGX Orin,
please check the device tree, you should use this regulator to provide 2v8.

                p3737_avdd_cam_2v8: regulator@106 {
                        compatible = "regulator-fixed";
                        reg = <106>;
                        regulator-name = "avdd-cam-2v8";