linux-kernel - Re: [PATCH 1/2] regulator: act8945a: rely on hardware for operating mode

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Message-ID: <42423085-2c9c-47f6-9588-3e2260da7cfa@sirena.org.uk>
Date:   Mon, 5 Jun 2023 17:30:36 +0100
From:   Mark Brown <broonie@...nel.org>
To:     Raag Jadav <raagjadav@...il.com>
Cc:     Liam Girdwood <lgirdwood@...il.com>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/2] regulator: act8945a: rely on hardware for operating
 mode

On Mon, Jun 05, 2023 at 09:46:14PM +0530, Raag Jadav wrote:
> On Mon, Jun 05, 2023 at 03:44:37PM +0100, Mark Brown wrote:

> > It's also removing a cache so we need to talk to the hardware more often
> > which doesn't seem like a win.  If there's a bootstapping problem then
> > shouldn't we just read once at startup?  If there's no problem what's
> > the advantage?

> Well, there could be cases of access which are done
> outside of driver context or hardware failure,
> which are not really ideal but I've faced such problems
> a while back, so just decided to share it.

If we have those then we've got a bigger problem, for example we might
switch to a lower power mode which can't support the load we're trying
to get the consumer to run.

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