Hi Manikanta,
We are using L4T 32.6.1 codebase . I searched all “Nano” PCIe node, there are not including “nvidia,enable-power-down” property in original codebase. But due to WiFi issue (Jetson Nano custom motherboard Wifi doesn't work) , we only modify PCIE node with remove the following property
/delete-property/ iommus;
/delete-property/ iommu-map;
/delete-property/ iommu-map-mask;
Have any idea about why we still see only one PCIe root port?
00:02.0 PCI bridge: NVIDIA Corporation Device 0faf (rev a1)
01:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 )