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

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Message-ID: <3cb28b7e-fc43-a222-77be-137e04118bd8@baylibre.com>
Date:   Wed, 22 Mar 2023 14:40:09 +0100
From:   Julien Panis <jpanis@...libre.com>
To:     Mark Brown <broonie@...nel.org>
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 3/22/23 14:13, Mark Brown wrote:
> 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.

Your understanding was correct.

>
>> 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.

OK, thank you for this explanation.
So, we keep 'ti,multi-phase-id' property.