+       md = &bus->md;
+       md->dev.bus = &sdw_bus_type;
+       md->dev.type = &sdw_master_type;
+       md->dev.parent = parent;
+       md->dev.of_node = parent->of_node;
+       md->dev.fwnode = fwnode;
+       md->dev.dma_mask = parent->dma_mask;
+
+       dev_set_name(&md->dev, "sdw-master-%d", bus->link_id);

This give nice sdw-master-0. In DT this comes from reg property. I dont
seem to recall if the ACPI/Disco spec treats link_id as unique across
the system, can you check that please, if not we would need to update
this.
Table 3 in the Disco for Soundwire 1.0 spec: "all LinkID values are relative to the immediate parent Device."

There isn't any known implementation with more than one controller.

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