On Wed, May 30, 2018 at 03:56:34PM +0300, Matti Vaittinen wrote: > On Wed, May 30, 2018 at 12:00:00PM +0100, Mark Brown wrote: > > The tradeoff with forced PWM mode is that the quality of regulation will > > be a lot better, especially if the load changes suddenly (as things like > > CPUs often do). Most hardware that's at all current is able respond to > > changes in load and switch modes automatically when it's appropriate, > > except possibly in some very low power modes. > Yes. The mode switching is automatic. But there is this control bit for > disabling automatic mode switching and forcing the PWM. Problem with > these 4 last bucks is just that if regulator is in PFM (and it may be > if not forced to PWM - due to this automatic switching) then the voltage > change is not behaving well. That sounds like the mode switching just isn't very good and needs a bit of help so forcing the mode is probably going to do the right thing.
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