On Mon, Aug 17, 2020 at 04:11:03PM +0800, Tzung-Bi Shih wrote:
> On Mon, Aug 17, 2020 at 3:29 PM Tzung-Bi Shih <tzungbi@google.com> wrote:

> > > +required:
> > > +  - compatible

> > And the same here.

> I misunderstood.  It still needs the compatible string to match the
> corresponding driver.

No, it doesn't.  The MFD should be registering the platform device.