linux-kernel - Re: [PATCH 2/5] regulator: act8865: set correct number of regulators in pdata

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Message-ID: <20140629094642.GA13485@gmail.com>
Date:	Sun, 29 Jun 2014 11:46:43 +0200
From:	Beniamino Galvani <b.galvani@...il.com>
To:	Mark Brown <broonie@...nel.org>
Cc:	Liam Girdwood <lgirdwood@...il.com>,
	Wenyou Yang <wenyou.yang@...el.com>,
	Rob Herring <robh+dt@...nel.org>,
	Pawel Moll <pawel.moll@....com>,
	Mark Rutland <mark.rutland@....com>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	Kumar Gala <galak@...eaurora.org>,
	Heiko Stuebner <heiko@...ech.de>, devicetree@...r.kernel.org,
	linux-doc@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH 2/5] regulator: act8865: set correct number of regulators
 in pdata

On Fri, Jun 27, 2014 at 05:07:25PM +0100, Mark Brown wrote:
> On Sun, Jun 22, 2014 at 05:31:42PM +0200, Beniamino Galvani wrote:
> > When platform data is populated from DT all the regulators are
> > instantiated and the value of num_regulators should be the number of
> > all available regulators rather than the number of matched ones.
> 
> Could you go into more detail on your logic on this one please?  The
> platform data (and DT configuration) for regulators should be completely
> optional.

pdata contains an array of struct act8865_regulator_data and a
num_regulators field which should hold the number of elements in the
array, if I understand correctly.

So in the current code, when populating platform data from DT, there
is a mismatch between the number of elements that are put in the array
(ARRAY_SIZE(act8865_matches)) and the value of num_regulators, which
is set to the number of regulators found in the DT.

In case of missing regulator nodes in DT, pdata->regulators will be
populated with all the regulators but their init_data will be NULL.

Beniamino
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