linux-kernel - Re: [PATCH v2 4/4] [media] ad5820: Add support for of-autoload

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Message-ID: <20180920201833.2d2skjn7fkrbdsqx@valkosipuli.retiisi.org.uk>
Date:   Thu, 20 Sep 2018 23:18:34 +0300
From:   Sakari Ailus <sakari.ailus@....fi>
To:     Laurent Pinchart <laurent.pinchart@...asonboard.com>
Cc:     Ricardo Ribalda Delgado <ricardo.ribalda@...il.com>,
        Pavel Machek <pavel@....cz>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        linux-media@...r.kernel.org, linux-kernel@...r.kernel.org,
        Hans Verkuil <hans.verkuil@...co.com>
Subject: Re: [PATCH v2 4/4] [media] ad5820: Add support for of-autoload

Hi Laurent,

On Thu, Sep 20, 2018 at 11:10:23PM +0300, Laurent Pinchart wrote:
> > +MODULE_DEVICE_TABLE(of, ad5820_of_table);
> > +
> >  static SIMPLE_DEV_PM_OPS(ad5820_pm, ad5820_suspend, ad5820_resume);
> > 
> >  static struct i2c_driver ad5820_i2c_driver = {
> >  	.driver		= {
> >  		.name	= AD5820_NAME,
> >  		.pm	= &ad5820_pm,
> > +		.of_match_table = ad5820_of_table,
> 
> As the driver doesn't depend on CONFIG_OF, would it make sense to use 
> of_config_ptr() (and to compile the of table conditionally on CONFIG_OF) ?

You get ACPI support as a bonus if you don't use of_config_ptr(). :-) Other
changes could be needed but this enables probing the driver for a device.

In this case the probability of anyone using this device on an ACPI system
could be pretty low though.

-- 
Regards,

Sakari Ailus
e-mail: sakari.ailus@....fi