linux-kernel - Re: [PATCH] gpio: em: Add Device Tree support

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Message-ID: <CANqRtoRUqDsspHQQ11d3c2jc+MvoROwfbv3so5=SGhHOs9k7WA@mail.gmail.com>
Date:	Wed, 27 Feb 2013 19:13:46 +0900
From:	Magnus Damm <magnus.damm@...il.com>
To:	Dmitry Torokhov <dmitry.torokhov@...il.com>
Cc:	linux-kernel@...r.kernel.org, grant.likely@...retlab.ca,
	horms@...ge.net.au, linus.walleij@...aro.org,
	linux-sh@...r.kernel.org
Subject: Re: [PATCH] gpio: em: Add Device Tree support

Hi Dmitry,

Thanks for your feedback!

On Wed, Feb 27, 2013 at 7:41 AM, Dmitry Torokhov
<dmitry.torokhov@...il.com> wrote:
> Hi Magnus,
>
> On Tue, Feb 26, 2013 at 10:26:23PM +0900, Magnus Damm wrote:
>> From: Magnus Damm <damm@...nsource.se>
>>
>> Update the Emma Mobile GPIO driver to add DT support.
>>
>
> ...
>
>> @@ -366,15 +387,33 @@ static int em_gio_remove(struct platform
>>       return 0;
>>  }
>>
>
> #ifdef CONFIG_OF here? No need to have extra aliases in modules if OF
> support is not enabled (or is entire ARM arch now enables device tree?).
>
>> +static const struct of_device_id em_gio_dt_ids[] = {
>> +     { .compatible = "renesas,em-gio", },
>> +     {},
>> +};
>> +MODULE_DEVICE_TABLE(of, em_gio_dt_ids);
>> +

I suppose we could sprinkle a couple of #ifdefs across the code, but I
have to say that I'm not that fond of #ifdefs in general. So if it was
up to me only then I would aim at having exactly zero #ifdefs in my
drivers at the expense of slightly larger binaries in some cases.

Are you interested in hacking on EMEV2 in general? I assume you're
busy, but I could try to locate a developer board for you if you'd
like.

Cheers,

/ magnus
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