linux-kernel - Re: [PATCH v2] regulator: wm8994: Add an off-on delay for WM8994 variant

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Message-ID: <20220328145917.GJ38351@ediswmail.ad.cirrus.com>
Date:   Mon, 28 Mar 2022 14:59:17 +0000
From:   Charles Keepax <ckeepax@...nsource.cirrus.com>
To:     Mark Brown <broonie@...nel.org>
CC:     Jonathan Bakker <xc-racer2@...e.ca>,
        Liam Girdwood <lgirdwood@...il.com>,
        <patches@...nsource.cirrus.com>, <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2] regulator: wm8994: Add an off-on delay for WM8994
 variant

On Mon, Mar 28, 2022 at 03:36:53PM +0100, Mark Brown wrote:
> On Mon, Mar 28, 2022 at 01:11:32PM +0000, Charles Keepax wrote:
> 
> > Part of me wonders if we should just apply it to 1811 and 8958
> > anyway, I suspect they have the same IP for the LDO and its just
> > the datasheets never got updated. I had a go chasing the apps guys
> > here but we are a little short on people who remember details of
> > these parts. So I guess we trust the datasheets for now, unless
> > you have any strong feelings, Mark?
> 
> With something like this the on/off time may be a requirement of the
> thing being powered rather than the regulator, the device might see
> enough power loss to confuse state but not trip the power on reset.

Aye a good point. I am certainly happy to stick with trusting the
datasheets here.

Thanks,
Charles