On Thu, Mar 28, 2019 at 12:46:15PM -0500, Rob Herring wrote: > On Thu, Mar 28, 2019 at 01:09:36PM +0000, Charles Keepax wrote: > > Lochnagar is an evaluation and development board for Cirrus > > Logic Smart CODEC and Amp devices. It allows the connection of > > most Cirrus Logic devices on mini-cards, as well as allowing > > connection of various application processor systems to provide a > > full evaluation platform. This driver supports the board > > controller chip on the Lochnagar board. > > > > Signed-off-by: Charles Keepax <ckeepax@xxxxxxxxxxxxxxxxxxxxx> > > --- > > +Required properties: > > + > > + - compatible : One of the following strings: > > + "cirrus,lochnagar2-hwmon" > > + > > +Example: > > + > > +lochnagar-hwmon { > > + compatible = "cirrus,lochnagar2-hwmon"; > > You don't have any resources in DT, the parent MFD driver can just > instantiate this child device. > + Lee Jones Lee, was very very keen for me to not mix mfd_add_devices and of_platform_populate in the MFD driver. As such we moved all the sub-drivers into DT. I agree it is a little odd that this exists only to bind in this driver but I think it is probably a bit late to change that. If we were going to have the MFD instantiating children directly a lot of the rest of the binding would have been done very differently. Thanks, Charles