On 1/4/2022 10:29 PM, Mark Brown wrote:
On Tue, Jan 04, 2022 at 11:05:59AM +0800, SevenLee wrote:
On 2021/12/29 08:45 PM, Mark Brown wrote:
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.
They are not to do at run-time. You are right, I will send the new patch
for clock
selection again, and then send the second patch with the slew rate for
the DT
property.
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