On Tue, Jan 04, 2022 at 11:05:59AM +0800, SevenLee wrote: > Mark Brown 於 2021/12/29 下午 08:45 寫道: > > The clock speed seems sensible enough to control from userspace since > > it's going to be a power/performance tradeoff but why also expose the > > slew rate to userspace - that seems more like something that would come > > from the board design? > Because customers need to adjust different DMIC materials by themselves. > Adjust which slope is the most suitable according to the conditions of > use, and > improve electromagnetic interference by setting the slew rate so that > customers > can try the best solution. Sure, but do they need to do this at runtime? That sounds like tuning that you do once during system design and never touch again so better done as a DT property.
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