Hi, I have a problem about controlling the GPIO in user space. I found that I could not control the GPIO in JP6.1 but I can control the same GPIO in JP5.1.x. For JP5.1.x, I can control the CAM_PWDN(GPIO_PH.06) $ gpioinfo gpiochip0 - 164 lines: ... line 43: "PH.00" unused in…

Hi Jerry Chang, The default libgpiod version is v1.6.3; it cannot get the correct status and could cause GPIOs to change the status. $ gpioget -v gpioget (libgpiod) v1.6.3 So I tried to upgrade libgpiod to v2.1.3: $ gpioget -v gpioget (libgpiod) v2.1.3 It can work normally for me and I can get …

hello jerry.liu21023, there’s camera device-tree overlay to define PH.06 by default. as you can see… from jetson-orin-nano-devkit.conf. OVERLAY_DTB_FILE+=**",tegra234-p3768-0000+p3767-0000-dynamic.dtbo"** here’s the sources of the dtbo file. $public_sources/r36.4.0/Linux_for_Tegra/source/kernel…

Hi @JerryChang I have already disabled the imx219 in device tree. I can ensure there is not any driver using PH.06. But I still cannot control the GPIO by gpioset for JP6.1. $ sudo dmesg | grep imx219 # do not show any messages because I disabled imx219 driver Then check GPIOs status $ gpioinf…

hello jerry.liu21023, is it due to this pin does not keep high after gpioset command? please try adding --mode=wait for keeping the pin state, i.e. $ sudo gpioset --mode=wait gpiochip0 49=1 you may also arrange hardware resources to probe the pin state for checking.

Hi @JerryChang Yes, it can keep the pin state by adding --mode=wait but I don’t want to do that. I control the gpio state when I’d like to change it to control my device. I don’t want to keep the state by keeping a process. it is not convenient for me and I cannot check gpio pin state because the…

Hi @JerryChang I tried the patch, and it can work, but there are some problems about GPIOs. Here is my result: First I can’t detect my i2c device address (0x3d) because the reset pin is low. $ sudo i2cdetect -r -y 10 0 1 2 3 4 5 6 7 8 9 a b c d e f 00: …

hello jerry.liu21023, Please also note that gpioget might cause its direction changed to input.

The answer cannot help me to resolve my problem. For Jetpack 5.1.x, there are not the same GPIOs issues. I do not think it is correct and the issue makes it hard to check the status of GPIOs by gpiod.

Hi JerryChang, I can control PH.06 and get the status of GPIO by gpio_sysfs now. Here is my result: root@ubuntu-desktop:/sys/class/gpio# echo 397 > export root@ubuntu-desktop:/sys/class/gpio# ls export gpiochip316 gpiochip348 PH.06 unexport root@ubuntu-desktop:/sys/class/gpio# cat PH.06/direc…

[image] jerry.liu21023: But it does not support GPIO_SYSFS for defconfig. I updated the kernel and it still did not work, so it is missing something much deeper. Just made the decision to use jp5.1.4 the pwm and cam will work when set with jetson-io.py. I need to make an ovelay but have not h…

Cannot Control GPIOs for JP61

Robotics & Edge Computing Jetson Systems Jetson Orin Nano

JerryChang December 20, 2024, 5:50am 9

hello jerry.liu21023,

please see-also Topic 301171 to apply the fixes for verification.

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Cannot Control GPIOs for JP61

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