On Mon, Jan 12, 2015 at 10:55:29AM -0600, Rob Herring wrote:
> On Mon, Jan 12, 2015 at 10:10 AM, Jacek Anaszewski

> > There are however devices that don't fall into this category, i.e. they
> > have many outputs, that can be connected to a single LED or to many LEDs
> > and the driver has to know what is the actual arrangement.

> We may need to extend the regulator binding slightly and allow for
> multiple phandles on a supply property, but wouldn't something like
> this work:

> led-supply = <&led-reg0>, <&led-reg1>, <&led-reg2>, <&led-reg3>;

> The shared source is already supported by the regulator binding.

What is the reasoning for this?  If a single supply is being supplied by
multiple regulators then in general those regulators will all know about
each other at a hardware level and so from a functional and software
point of view will effectively be one regulator.  If they don't/aren't
then they tend to interfere with each other.