On Wed, 2019-12-04 at 14:14 +0000, Mark Brown wrote: > On Wed, Dec 04, 2019 at 01:13:08PM +0000, Vaittinen, Matti wrote: > > > I think I once again explained myself badly. There can be only one > > group with 4 RUN states selected by combination of 2 GPIO lines. > > bucks > > 1,2,6 and 7 can each either be assigned into this one group or > > controlled individually via I2C. But I doubt assigning only one of > > the > > bucks in this group is the typical use-case. What we would need > > would > > I don't think this is as unusual as you're thinking - the > regulators people want to control quickly are usually the main > CPU supply regulators and these often vary independently of > anything else. Hmm. I see your point. You might be correct. Allowing only one buck to be assigned in 'run-level group' (to be controlled by GPIOs) would be totally possible with current regulator API - and it might be useful for scaling the CPU voltage. I appreciate your help and experience here :) Implementing it would be also pretty simple, caching and controlling the run-level voltages is already there in patch 12, I just should restrict the group size to one buck. I will see how it works and also ask if my colleagues know whether this is valuable with our current customer's SOCs. Thanks a bunch! Br, Matti Vaittinen
