linux-kernel - Re: [PATCH 2/4] mfd: max77686: Use module_i2c

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Message-ID: <20160215082102.GB3455@x1>
Date:	Mon, 15 Feb 2016 08:21:02 +0000
From:	Lee Jones <lee.jones@...aro.org>
To:	Krzysztof Kozlowski <k.kozlowski@...sung.com>
Cc:	Javier Martinez Canillas <javier@....samsung.com>,
	linux-kernel@...r.kernel.org, Andi Shyti <andi.shyti@...sung.com>,
	linux-samsung-soc@...r.kernel.org,
	Laxman Dewangan <ldewangan@...dia.com>
Subject: Re: [PATCH 2/4] mfd: max77686: Use module_i2c_driver() instead of
 subsys initcall

On Mon, 15 Feb 2016, Krzysztof Kozlowski wrote:

> On 12.02.2016 13:30, Javier Martinez Canillas wrote:
> > The driver's init and exit function don't do anything besides adding and
> > deleting the I2C driver so the module_i2c_driver() macro could be used.
> > 
> > Currently is not being used because the driver is initialized at subsys
> > initcall level, claiming that this is done to allow consumers devices to
> > use the resources provided by this driver. But dependencies should be in
> > the DT and consumers drivers should not rely in the registration order.
> > 
> > Signed-off-by: Javier Martinez Canillas <javier@....samsung.com>
> > ---
> > 
> >  drivers/mfd/max77686.c | 13 +------------
> >  1 file changed, 1 insertion(+), 12 deletions(-)
> > 
> 
> In the past not all dependencies supported deferred probing so such
> ordering was required.
> 
> I don't like the "dependencies should be in DT" reason for the change...
> because it is kind of wishful thinking. Yeah, the dependencies should be
> in DT, but are they?
> 
> Instead *please check it* and write:
> "Dependencies are in DT so manual ordering of init calls is not
> necessary any more".
> 
> My fast tests of this patch shown that it works good... but some more
> thorough tests should be done.

See to all of this, collect the Acks you've received and re-submit
please.

-- 
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org │ Open source software for ARM SoCs
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