Power-cycle PCIe

[felleman]

I have a usb-hub attached to my PCIe slot on AGX, I would like to power-cycle the PCIe slot to have a power off method for my peripherals plugged into the hub. I could find any documentation on how to do this, or even if the feature exists. Any ideas?

[Manikanta]

Hi,

AGX doesn’t support hot plug and unplug. If you want to have power off slot regulators then you need completely unbind Tegra PCIe driver for that particular controller instance.

cd /sys/bus/platform/drivers/tegra-pcie-dw
echo 141a0000.pcie > unbind #To unbind EP client driver, power down PCIe controller and power off slot regulators

echo 141a0000.pcie > bind #To power on slot regulators, power up PCIe controller and bind EP client driver.

Thanks,
Manikanta