linux-kernel - Re: [PATCH] regulator: qcom-rpmh: Fix pm8010 pmic5

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Date: Wed, 14 Feb 2024 14:52:02 +0000
From: Mark Brown <broonie@...nel.org>
To: Bryan O'Donoghue <bryan.odonoghue@...aro.org>
Cc: andersson@...nel.org, konrad.dybcio@...aro.org, lgirdwood@...il.com,
	quic_fenglinw@...cinc.com, quic_collinsd@...cinc.com,
	linux-arm-msm@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] regulator: qcom-rpmh: Fix pm8010 pmic5_pldo502ln minimum
 voltage

On Wed, Feb 14, 2024 at 02:44:56PM +0000, Bryan O'Donoghue wrote:
> On 14/02/2024 14:13, Mark Brown wrote:

> > Not just that but also note that every voltage step in the range will
> > have the 8mV offset added.

> The documents I have just show sensors attached to ldo3, ldo4 and ldo6 fixed
> at 1.808.

> I don't think there's any better or different information than a +200000uV
> increment TBH.

This seems like a very surprising and unusual hardware design, the
1.808V voltage is already unusual.  Note that this may break systems
that are trying to set a range of say 1.8-2.0V if they actually need to
set 2V.

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