How to map ethtool's bus-info to /sys/devices/?

Question

How are the bus-info addresses from ethtool -i <netdev> to be interpreted in order to address the corresponding HW device in /sys/devices/? That is, using the Linux sysfs API with the information returned by the ethtool ioctl SIOCETHTOOL (or similar) API?

Please note that I'm in a situation where I cannot use /sys/class/net/ due to the way that sysfs filters the net/ branch(es) based on the mounting process' network namespace. sysfs does not filter net/ based on the sysfs-reading process' current network namespace; compare this with procfs which always correctly adapts to the procfs-reading process' current PID namespace.

For instance, on a Raspberry Pi 4B with Ubuntu 21.10 ethtool -i eth0 for the integrated eth0 HW NIC just draws a literal blank:

bus-info:

The eth0 device seems to be located here: /sys/devices/platform/emmc2bus/subsystem/devices/fd580000.ethernet/.

Plugging in an USB-based Ethernet dongle and then querying it I get:

bus-info: usb-0000:01:00.0-1.1

Unfortunately, that's not a directly valid item in, say, /sys/devices/...

How are the bus-info addresses reported by the ethtool API (socket/RTNETLINK) to be resolved depending on the different "bus" systems?