On Mon, Sep 27, 2021 at 10:42:00AM +0100, Daniel Thompson wrote:

> Based on this I had expected to find spi_get_device_id() and a ->driver_data
> somewhere in this patch.

> Where will this .driver_data be consumed? 

It will never be consumed unless someone writes a board file - the
runtime match will still happen based on the DT compatible, this is only
there for the modalias.