linux-kernel - Re: [PATCH INTERNAL v1 3/3] regulator: tps6594-regulator: Add driver for TI TPS6594 regulators

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Message-ID: <ZBr+7X3lcFdI8p/o@sirena.org.uk>
Date:   Wed, 22 Mar 2023 13:13:17 +0000
From:   Mark Brown <broonie@...nel.org>
To:     Julien Panis <jpanis@...libre.com>
Cc:     Esteban Blanc <eblanc@...libre.com>, linus.walleij@...aro.org,
        lgirdwood@...il.com, a.zummo@...ertech.it,
        alexandre.belloni@...tlin.com, linux-kernel@...r.kernel.org,
        linux-gpio@...r.kernel.org, linux-rtc@...r.kernel.org,
        jneanne@...libre.com
Subject: Re: [PATCH INTERNAL v1 3/3] regulator: tps6594-regulator: Add driver
 for TI TPS6594 regulators

On Wed, Mar 22, 2023 at 10:10:23AM +0100, Julien Panis wrote:

> Question @ Mark/Liam:
> Shouldn't we use the generic 'regulator-coupled-with' property
> instead of 'ti,multi-phase-id' ?

My understanding was that this was a hardware configuration where
two regulators operate as one with only one set of registers used
for configuration.

> I am in charge of upstreaming dt-bindings and maintainers
> pointed out the similarity between 'multi-phase' and 'coupled'
> regulator concepts. Does 'regulator-coupled-with' mean that
> outputs of buck converters are combined ? If so, this generic
> property should replace our specific 'ti,multi-phase-id' prop,
> I guess.

No, coupled regulators are regulators where the voltages can vary
but there's a constraint that their configurations need to be
related somehow, for example they must be within 200mV of each
other or something like that.

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