On Wed, Oct 01, 2014 at 03:23:44PM +0200, Stefan Wahren wrote: > Is it better to let the core handles the ramp delay instead of set_voltage_sel > with a busy wait? > I've found that polling DC_OK is only reliable for increasing voltages. So i > think about defining ramp delay in the regulator description. It's better to use the notification from the device if it is reliable; dead reckoning isn't going to work well either for voltage reduction since the time taken to implement a drop in voltage is more a function of the loading than anything else, the regulator can't really control it. For most DC-DC loads it'll be quick enough though.
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