On Fri, May 25, 2018 at 08:54:30AM +0300, Matti Vaittinen wrote:

On Thu, May 24, 2018 at 06:57:21PM +0100, Mark Brown wrote:

quoted

You can look at the regulators node within the parent device, you know
that in Linux the parent device will be the MFD.

So I should parse the device-tree in MFD my driver in order to locate
the regulators node? Isn't that somewhat like code dublication? If we
rely on compatibles we can avoid device-tree parsing in MFD driver,

No, there's no need to do this - the child can just look at the of_node
of the parent since it can never be instantiated otherwise.

right? An in-tree example of this is:

There are some bad examples (and some where the same regulators can get
used with multiple different parents) but that's no reason not to follow
good practice.