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Date:   Thu, 15 Dec 2022 16:09:50 +0000
From:   Mark Brown <broonie@kernel.org>
To:     jerome Neanne <jneanne@baylibre.com>
Cc:     Wadim Egorov <W.Egorov@phytec.de>,
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Subject: Re: [PATCH v7 1/6] DONOTMERGE: arm64: dts: ti: Add TI TPS65219 PMIC
 support for AM642 SK board.
Message-ID: <Y5tGzjgcAWPqdFNE@sirena.org.uk>
References: <20221104152311.1098603-1-jneanne@baylibre.com>
 <20221104152311.1098603-2-jneanne@baylibre.com>
 <d0d7e315-ce86-0420-8ef5-fe2e4aefd5b4@phytec.de>
 <e2bc53fe-3a0c-cf24-8b29-ca377aba3721@baylibre.com>
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On Thu, Dec 15, 2022 at 04:51:40PM +0100, jerome Neanne wrote:
> On 15/12/2022 16:09, Wadim Egorov wrote:

> > I am testing your PMIC patches on a AM62 based board with a similar set=
up and
> > running into the following error

> >   =A0=A0 VDDSHV5_SDIO: bypassed regulator has no supply!
> >   =A0=A0 VDDSHV5_SDIO: will resolve supply early: ldo1
> >   =A0=A0 VDDSHV5_SDIO: supplied by regulator-dummy
> >   =A0=A0 VDDSHV5_SDIO: failed to get the current voltage: -EINVAL

> > Have you noticed problems with LDO1 and bypass mode?

> I did not noticed this on am642 board but IIRC this rail was not used. I
> heard about similar issue reported to me by Nishanth M with a fix proposal
> here:
> https://gist.github.com/nmenon/e4dd6ef6afe31bc9750fa6cbee8d3e25

That proposal looks really non-idiomatic and quite unusual, if there's a
fixed voltage supply to the LDO I'd expect to see it modeled as a fixed
voltage regulator.  I'm not sure what the use of bypass here is trying
to accomplish TBH.

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