linux-kernel - Re: [PATCHv1 1/2] rx51_battery: convert to iio consumer

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Message-ID: <CAAfyv36jJoMxZQ5e43pEC2rzNBHHW9Jt_4dg5O-fS8e+Aim7jA@mail.gmail.com>
Date:	Fri, 28 Feb 2014 21:32:12 +0100
From:	Belisko Marek <marek.belisko@...il.com>
To:	Sebastian Reichel <sre@...ian.org>
Cc:	Dmitry Eremin-Solenikov <dbaryshkov@...il.com>,
	David Woodhouse <dwmw2@...radead.org>,
	Jonathan Cameron <jic23@...nel.org>,
	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>,
	Grant Likely <grant.likely@...aro.org>,
	LKML <linux-kernel@...r.kernel.org>,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
	linux-iio@...r.kernel.org,
	Pali Rohár <pali.rohar@...il.com>
Subject: Re: [PATCHv1 1/2] rx51_battery: convert to iio consumer

Hi Sebastian,

On Fri, Feb 28, 2014 at 3:05 AM, Sebastian Reichel <sre@...ian.org> wrote:
> On Thu, Feb 27, 2014 at 10:34:35PM +0100, Belisko Marek wrote:
>> Well I've tried and it's worse :). I got during booting:
>> [    2.218383] ERROR: could not get IIO channel /battery:temp(0)
>> [    2.224639] platform battery.4: Driver twl4030_madc_battery
>> requests probe deferral
>> Not sure if it's just error or warning but temp is always reported as
>> 0 (and also other values in sysfs).
>
> This is an error, which basically means, that twl4030-madc has not
> yet been loaded. Do you get proper values when you use the old madc
> API with the patchset applied?
It works without converting to iio consumer (at least I get some
reasonable values).
With conversion it fails with above error. I recheck (add printk to
iio twl4030-madc) that
madc driver is loaded. Could this be that twl4030_madc_battery is
loaded earlier then
twl4030_madc and than it fails to get iio channels?
>
> -- Sebastian

BR,

marek

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