Hi, Conor, On 12/19/24 2:11 PM, Conor Dooley wrote: >> There are mailbox clients that can discover the mailbox channel ID at >> run-time. For such cases passing the channel identifier via DT is >> redundant. Add support for referencing controllers solely by node. > I don't really get your implementation, why not just allow #mbox-cells = 0? > That's what's done for things like fixed frequency clocks that only have > a single output. Ah, indeed! instead of: of_parse_phandle(dev->of_node, "mbox", 0); I can do a: of_parse_phandle_with_args(dev->of_node, "mboxes", "#mbox-cells", 0, &of_args) where #mbox-cells = 0; Or ... can I pass NULL for cells_name and make the #mbox-cells property optional and still keeping its requirement of being at least 1? Thanks! ta