From: Mark Brown <broonie@kernel.org>
To: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Cc: devicetree@vger.kernel.org, alexandre.belloni@bootlin.com,
lars@metafoo.de, alsa-devel@alsa-project.org,
linux-kernel@vger.kernel.org, tiwai@suse.com,
lgirdwood@gmail.com, perex@perex.cz, robh+dt@kernel.org,
krzysztof.kozlowski+dt@linaro.org, Claudiu.Beznea@microchip.com,
linux-arm-kernel@lists.infradead.org
Subject: Re: [PATCH 2/3] ASoC: dt-bindings: sama7g5-pdmc: add microchip,startup-delay-us binding
Date: Thu, 16 Feb 2023 14:46:36 +0000 [thread overview]
Message-ID: <Y+5BzEJBaTn3twBH@sirena.org.uk> (raw)
In-Reply-To: <fd2f372f-4a1c-72c0-574d-1d5ef99dbdbc@linaro.org>
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On Thu, Feb 16, 2023 at 11:18:16AM +0100, Krzysztof Kozlowski wrote:
> On 16/02/2023 11:15, Claudiu.Beznea@microchip.com wrote:
> >>> + 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.
> >> Is this some hardware delay? Or OS? If OS, why Linux specific delay is
> >> put into DT?
> > 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.
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next prev parent reply other threads:[~2023-02-16 14:47 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-02-14 16:14 [PATCH 0/3] ASoC: mchp-pdmc: fix poc noises when starting capture Claudiu Beznea
2023-02-14 16:14 ` [PATCH 1/3] ASoC: soc-generic-dmaengine-pcm: add option to start DMA after DAI Claudiu Beznea
2023-02-14 18:14 ` Lars-Peter Clausen
2023-02-14 21:26 ` Mark Brown
2023-02-16 9:49 ` Claudiu.Beznea
2023-02-16 13:53 ` Lars-Peter Clausen
2023-02-17 10:59 ` Claudiu.Beznea
2023-02-14 16:14 ` [PATCH 2/3] ASoC: dt-bindings: sama7g5-pdmc: add microchip,startup-delay-us binding Claudiu Beznea
2023-02-16 10:04 ` Krzysztof Kozlowski
2023-02-16 10:15 ` Claudiu.Beznea
2023-02-16 10:18 ` Krzysztof Kozlowski
2023-02-16 10:41 ` Claudiu.Beznea
2023-02-16 10:43 ` Krzysztof Kozlowski
2023-02-16 14:46 ` Mark Brown [this message]
2023-02-14 16:14 ` [PATCH 3/3] ASoC: mchp-pdmc: fix poc noise at capture startup Claudiu Beznea
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