On x86 computer, the official document is quite straightforward.
I installed usdr-lib, which contains a SoapySDR plugin, to /usr/local
. Then, the SoapySDR installed from ArchLinux package manager can detect the plugin and then the device, by: LD_LIBRARY_PATH=/usr/local/lib SoapySDRUtil --find
I'm using this hat https://www.waveshare.com/pcie-to-m.2-board-c.htm
Detected usdr at 01:00.0 (no drivers installed at this stage):