On Mon, Nov 24, 2014 at 06:12:33PM +0100, Alban Bedel wrote: > Using this driver the DTS for the add-on board can further constrain > this supply to get the voltage it need, for example 3.3V. I understand > I saw 3 ways to solve this problem: > 1) This, use a "filter" regulator > 2) Extend each and every driver that use a voltage regulator to > optionally set the voltage > 3) Include the required range in the phandle reference > #1 was the easiest :) #2 doesn't seems practical to me, #3 seems pretty > good but I'm really not sure if that would be acceptable. The DT overlay for the add on board should be setting the constraints for the parent regulator. I wouldn't expect the final DT to look any different to how it looks with no hardware modularity unless the actual module is interesting enough to have a driver of its own.
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