linux-kernel - Re: [PATCH v4 4/5] regulator: tps65912: Add regulator driver for the TPS65912 PMIC

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Message-ID: <563B9A10.4020907@ti.com>
Date:	Thu, 5 Nov 2015 12:04:00 -0600
From:	"Andrew F. Davis" <afd@...com>
To:	Mark Brown <broonie@...nel.org>
CC:	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>,
	Lee Jones <lee.jones@...aro.org>,
	Alexandre Courbot <gnurou@...il.com>,
	Grygorii Strashko <grygorii.strashko@...com>,
	<devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v4 4/5] regulator: tps65912: Add regulator driver for the
 TPS65912 PMIC

On 11/05/2015 04:14 AM, Mark Brown wrote:
> On Wed, Nov 04, 2015 at 09:35:26AM -0600, Andrew F. Davis wrote:
>
>> Something I just noticed, when I remove this table, module loading stops
>> working, even with 'MODULE_ALIAS("platform:tps65912-regulator");'. It
>> looks like when DT is enabled platform_uevent (drivers/base/platform.c:787)
>> only sends out the OF MODALIAS event then returns, not sending out the
>> platform event, is this desired behavior? If so then I will need this
>> table even though I still create the device and match it on platform
>> name as you suggested.
>
> That sounds like a bug to me, it'll have broken a bunch of existing
> devices.
>

Most OF drivers have the OF MODALIAS.

'platform_uevent' can only emit one MODALIAS string per device (only
the last emitted one seems to count), so for any device with
'dev->of_node' set it will be the OF MODALIAS string. So I need
that table (to generate the OF MODALIAS) or this sub-device module
will not be loaded.
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