Hi, > > > > > +properties: > > > > > + compatible: > > > > > + oneOf: > > > > > + - const: loongson,ls1b-nfc > > > > > > > > What is the rationale behind this choice? Seems like the b variant has > > > > two possible implementations and should always be preceded by a more > > > > specific compatible. > > > > > > > > As there is currently no description of this controller upstream, I > > > > would not care too much about any out-of-tree description and directly > > > > go for a clean description. > > > > > > > Excuse me, should I add a description for this property? > > > > No, description is not needed. But you are allowing the > > "loongson,ls1b-nfc" compatible alone, which I think is not relevant, > > unless you convince me it is :-) > > > "loongson,ls1b-nfc" itself is a specific implementation. > I was suggested to set up a fallback before. > https://lore.kernel.org/all/20231007-untapped-masses-01f80b7c13c7@spud/ > Then "loongson,ls1b-nfc" became the fallback. You cannot allow 'the fallback', alone. But this is what you do above. Below description is fine. Just don't allow the ls1b-nfc compatible alone. Thanks, Miquèl