A long time ago, that I started the question, but a few days ago, I started again to solve it. And with the help of several AI, I found a working solution. This is the working overlay: /dts-v1/; /plugin/; /* * NanoPI Neo2 H5 - OTG USB with switchable VBUS * Allows SD-Card as USB device on OTG port with GPIO-controlled power * * Key points: * - fragment 0: dr_mode "otg" enables dual-role (host+device detection) * - fragment 1: Removing usb0_id_det-gpios prevents "External vbus detected" error * - fragment 2: Removing gpio property from regulator keeps GPIO 354 (PR2) free for manual control * - fragment 3: GPIO 354 is controlled via usb.sh script (echo 1/0 to /sys/class/gpio/gpio354/value) * * GPIO 354 (PR2) state: * 1 = VBUS ON (USB device recognized) * 0 = VBUS OFF (USB device disconnected) */ / { compatible = "allwinner,sun50i-h5"; fragment@0 { target = <&usb_otg>; __overlay__ { dr_mode = "otg"; status = "okay"; }; }; fragment@1 { target = <&usbphy>; __overlay__ { usb0_id_det-gpios; }; }; fragment@2 { target-path = "/usb0-vbus"; __overlay__ { gpio; status = "okay"; }; }; fragment@3 { target = <&r_pio>; __overlay__ { usb0_vbus_pin: usb0_vbus_pin { pins = "PR2"; function = "gpio_out"; output-high; }; }; }; }; This allows the standard GPIO controls using sysfs in /sys/class/gpio. I'm using the kernel Linux nanopineo2 6.6.75-current-sunxi64 on Armbian 25.11.2 bookworm (32 bit userland). Hope this helps everybody trying to achive the same 😉

Added the respective PR: https://github.com/armbian/build/pull/9496

Since the hardware support for Rockchip SoCs in the mainline kernelis generally already very outstanding and their further development is also being actively pursued, I only have SBCs with integrated NPUs that are based on them. Among them are ODROID-M2, NanoPC-T6, and ROCK-5-ITX. But since the NPU is an integral part of the SoC, the board manufacturer and the design of the SBC are not necessarily of importance. As far as I understand, edge-class NPUs are best suited for computer vision tasks. I am therefore engaged in object detection: and super-resolution:

I'm having a problem with my Raspberry Pi 5, which I describe below. I have a DVR connected to it via Ethernet. If I connect both at the same time, dmesg reports a failure and I can't ping the DVR to establish a connection; I have to run `ifconfig eth0 down` and `ifconfig eth0 up`. Can anyone help or know if there's a bug in the kernel version? I'm using Ubuntu 22.04. jammy root:~# dmesg | grep eth0 [ 1.312167] macb 1f00100000.ethernet eth0: Cadence GEM rev 0x00070109 at 0x1f00100000 irq 108 (2c:cf:67:81:d6:2a) [ 3.237493] systemd[1]: Found device /sys/subsystem/net/devices/eth0. [ 3.453483] systemd[1]: Started ifup for eth0. [ 3.573655] macb 1f00100000.ethernet eth0: PHY [1f00100000.ethernet-ffffffff:01] driver [Broadcom BCM54213PE] (irq=POLL) [ 3.573668] macb 1f00100000.ethernet eth0: configuring for phy/rgmii-id link mode [ 6.441950] macb 1f00100000.ethernet eth0: Link is Up - 100Mbps/Full - flow control off [ 11.560707] macb 1f00100000.ethernet eth0: Link is Down [ 13.605678] macb 1f00100000.ethernet eth0: Link is Up - 100Mbps/Full - flow control off root:~# ping 192.168.200.201 PING 192.168.200.201 (192.168.200.201) 56(84) bytes of data. ^C --- 192.168.200.201 ping statistics --- 6 packets transmitted, 0 received, 100% packet loss, time 13305ms root:~# ifconfig eth0 down root:~# ifconfig eth0 up root:~# dmesg | grep eth0 [ 1.312167] macb 1f00100000.ethernet eth0: Cadence GEM rev 0x00070109 at 0x1f00100000 irq 108 (2c:cf:67:81:d6:2a) [ 3.237493] systemd[1]: Found device /sys/subsystem/net/devices/eth0. [ 3.453483] systemd[1]: Started ifup for eth0. [ 3.573655] macb 1f00100000.ethernet eth0: PHY [1f00100000.ethernet-ffffffff:01] driver [Broadcom BCM54213PE] (irq=POLL) [ 3.573668] macb 1f00100000.ethernet eth0: configuring for phy/rgmii-id link mode [ 6.441950] macb 1f00100000.ethernet eth0: Link is Up - 100Mbps/Full - flow control off [ 11.560707] macb 1f00100000.ethernet eth0: Link is Down [ 13.605678] macb 1f00100000.ethernet eth0: Link is Up - 100Mbps/Full - flow control off [ 147.034711] macb 1f00100000.ethernet eth0: Link is Down [ 151.855860] macb 1f00100000.ethernet eth0: PHY [1f00100000.ethernet-ffffffff:01] driver [Broadcom BCM54213PE] (irq=POLL) [ 151.855871] macb 1f00100000.ethernet eth0: configuring for phy/rgmii-id link mode [ 152.869842] macb 1f00100000.ethernet eth0: Link is Up - 100Mbps/Full - flow control off root:~# ping 192.168.200.201 PING 192.168.200.201 (192.168.200.201) 56(84) bytes of data. 64 bytes from 192.168.200.201: icmp_seq=1 ttl=64 time=1.01 ms 64 bytes from 192.168.200.201: icmp_seq=2 ttl=64 time=1.01 ms ^C --- 192.168.200.201 ping statistics --- 2 packets transmitted, 2 received, 0% packet loss, time 1001ms rtt min/avg/max/mdev = 1.007/1.007/1.007/0.000 ms