linux-kernel - Re: [PATCH v3 2/2] media: i2c: Add IMX296 CMOS image sensor driver

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Message-ID: <20191030083544.GG5017@valkosipuli.retiisi.org.uk>
Date:   Wed, 30 Oct 2019 10:35:44 +0200
From:   Sakari Ailus <sakari.ailus@....fi>
To:     Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
Cc:     mchehab@...nel.org, robh+dt@...nel.org,
        linux-media@...r.kernel.org, linux-kernel@...r.kernel.org,
        devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        c.barrett@...mos.com, a.brela@...mos.com, peter.griffin@...aro.org
Subject: Re: [PATCH v3 2/2] media: i2c: Add IMX296 CMOS image sensor driver

On Wed, Oct 30, 2019 at 11:56:34AM +0530, Manivannan Sadhasivam wrote:
> Hi Sakari,
> 
> Thanks for the review!

You're welcome!

> 
> On Tue, Oct 29, 2019 at 02:13:20PM +0200, Sakari Ailus wrote:
> > Hi Manivannan,
> > 
> > On Fri, Oct 25, 2019 at 11:29:08PM +0530, Manivannan Sadhasivam wrote:

...

> > > +static struct i2c_driver imx296_i2c_driver = {
> > > +	.probe_new  = imx296_probe,
> > > +	.remove = imx296_remove,
> > > +	.driver = {
> > > +		.name  = "imx296",
> > > +		.pm = &imx296_pm_ops,
> > > +		.of_match_table = of_match_ptr(imx296_of_match),
> > 
> > No need for of_match_ptr here.
> > 
> 
> AFAIK, of_match_ptr is needed for !OF case. Else we need to manually add
> #ifdef clut to make it NULL. Does the situation changed now?

ACPI based systems can also make use of the compatible string for matching
drivers with devices through of_match_table. This may sometimes be the most
practical approach. I.e. you don't need ifdefs either.

-- 
Regards,

Sakari Ailus