Re: [PATCH 2/3] ASoC: dt-bindings: sama7g5-pdmc: add microchip,startup-delay-us binding

On Thu, Feb 16, 2023 at 11:18:16AM +0100, Krzysztof Kozlowski wrote:

On 16/02/2023 11:15, Claudiu.Beznea@microchip.com wrote:

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• microchip,startup-delay-us:
• description: |

•  Specifies the delay in microseconds that needs to be applied after
  

•  enabling the PDMC microphones to avoid unwanted noise due to microphones
  

•  not being ready.
  

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Is this some hardware delay? Or OS? If OS, why Linux specific delay is put into DT?

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It's the delay used in software workaround that IP needs to filter noises.

Then this sounds like OS? Linux related properties usually do not belong to DT.

This is a hardware property, it's the time needed for the input to settle.