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

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Message-ID: <YkHIBXixM1rERxqg@sirena.org.uk>
Date:   Mon, 28 Mar 2022 15:36:53 +0100
From:   Mark Brown <broonie@...nel.org>
To:     Charles Keepax <ckeepax@...nsource.cirrus.com>
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 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.

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