The Hilscher netHAT 52-RTE is an expansion board for the Raspberry Pi.
- Hilscher netX 52 controller (SPI CS0)
As of 4.12, there are no SPI drivers for A64 yet. Instead we can use "spi-gpio".
An experimental DT overlay is available.
Experimental beginnings of a kernel driver: https://github.com/afaerber/netx-module