linux-kernel - Re: [PATCH] regulator: palmas: set supply

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Message-ID: <20210629155922.GD4613@sirena.org.uk>
Date:   Tue, 29 Jun 2021 16:59:22 +0100
From:   Mark Brown <broonie@...nel.org>
To:     "H. Nikolaus Schaller" <hns@...delico.com>
Cc:     Tony Lindgren <tony@...mide.com>,
        Liam Girdwood <lgirdwood@...il.com>,
        Nishanth Menon <nm@...com>,
        Peter Ujfalusi <peter.ujfalusi@...com>,
        linux-omap@...r.kernel.org, linux-kernel@...r.kernel.org,
        letux-kernel@...nphoenux.org, kernel@...a-handheld.com
Subject: Re: [PATCH] regulator: palmas: set supply_name after registering the
 regulator

On Tue, Jun 29, 2021 at 05:24:03PM +0200, H. Nikolaus Schaller wrote:
> Commit 98e48cd9283d ("regulator: core: resolve supply for boot-on/always-on regulators")
> 
> introduced a new rule which makes Palmas regulator registration fail:
> 
> [    5.407712] ldo1: supplied by vsys_cobra
> [    5.412748] ldo2: supplied by vsys_cobra
> [    5.417603] palmas-pmic 48070000.i2c:palmas@48:palmas_pmic: failed to register 48070000.i2c:palmas@48:palmas_pmic regulator
> 
> This seems to block additions initializations and finally the
> Pyra-Handheld hangs when trying to access MMC because there is
> no mmc-supply available.

What is that rule and how is this patch intended to ensure that Palmas
meets it?  As covered in submitting-patches.rst your changelog should
explain this so that in review we can verify that this is a good fix.
The change itself looks worrying like it just shuts the error up and
could cause problems for other systems.

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