On 14/08/2018 08:49:53+0200, Quentin Schulz wrote: > Understood but it's an intermediate patch. Later (patch 8), the SerDes > muxing "controller" is added as a child to this node. There most likely > will be some others in the future (temperature sensor for example). > > Furthermore, there's already a simple-mfd without children in this file: > https://elixir.bootlin.com/linux/latest/source/Documentation/devicetree/bindings/mips/mscc.txt#L19 > > How should we handle this case? > There were child nodes in previous version of the binding. You can remove simple-mfd now. The useful registers that are not used by any drivers are gpr and chipid. -- Alexandre Belloni, Bootlin Embedded Linux and Kernel engineering https://bootlin.com