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