linux-kernel - Re: [PATCH 2/4] ASoC: dt-bindings: wlf,wm8524: Add a property to specify power up sequency time

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Message-ID: <Y/YPkgOreByREmOz@sirena.org.uk>
Date:   Wed, 22 Feb 2023 12:50:26 +0000
From:   Mark Brown <broonie@...nel.org>
To:     Chancel Liu <chancel.liu@....com>
Cc:     lgirdwood@...il.com, robh+dt@...nel.org,
        krzysztof.kozlowski+dt@...aro.org, perex@...ex.cz, tiwai@...e.com,
        ckeepax@...nsource.cirrus.com, patches@...nsource.cirrus.com,
        alsa-devel@...a-project.org, linux-kernel@...r.kernel.org,
        devicetree@...r.kernel.org
Subject: Re: [PATCH 2/4] ASoC: dt-bindings: wlf,wm8524: Add a property to
 specify power up sequency time

On Wed, Feb 22, 2023 at 07:39:43PM +0800, Chancel Liu wrote:
> This property specifies power up to audio out time. It's necessary
> beacause this device has to wait some time before ready to output audio
> after MCLK, BCLK and MUTE=1 are enabled. For more details about the
> timing constraints, please refer to WTN0302 on
> https://www.cirrus.com/products/wm8524/

According to that the delay is a property of MCLK and the sample rate
rather than a per board constant, it shouldn't be in DT but rather the
driver should figure out the required delay on each startup.

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