On Mon, Jul 17, 2023 at 11:28:12AM -0700, Dmitry Torokhov wrote:

I think there is a disconnect. Right now device_get_match_data callbacks
are part of fwnode_operations. I was proposing to add another optional
device_get_match_data callback to 'struct bus_type' to allow individual
buses control how match data is handled, before (or after) jumping into
the fwnode-backed device_get_match_data callbacks.

Ah, that explains why I never heard of it!  I can see that being useful
for providing a single interface to pull mach data out of in drivers.