linux-kernel - Re: [RFC PATCH 0/5] add gpio_chip

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Message-ID: <CABxcv=mb+CXQbrS==hBayMQGsaJCPuLR=xyW_BJpZm2oSNBu-w@mail.gmail.com>
Date:	Tue, 22 Apr 2014 14:28:25 +0200
From:	Javier Martinez Canillas <javier@...hile0.org>
To:	Linus Walleij <linus.walleij@...aro.org>
Cc:	Javier Martinez Canillas <javier.martinez@...labora.co.uk>,
	Alexandre Courbot <acourbot@...dia.com>,
	Mika Westerberg <mika.westerberg@...ux.intel.com>,
	Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
	Arnd Bergmann <arnd@...db.de>,
	Santosh Shilimkar <santosh.shilimkar@...com>,
	Kevin Hilman <khilman@...aro.org>,
	"linux-gpio@...r.kernel.org" <linux-gpio@...r.kernel.org>,
	Linux-OMAP <linux-omap@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [RFC PATCH 0/5] add gpio_chip_ops to hold GPIO operations

Hello Linus,

On Tue, Apr 22, 2014 at 1:36 PM, Linus Walleij <linus.walleij@...aro.org> wrote:
> On Tue, Apr 8, 2014 at 8:20 PM, Javier Martinez Canillas
> <javier.martinez@...labora.co.uk> wrote:
>
>> So this is an RFC patch-set to add a virtual table to be used by
>> GPIO chip controllers and consist of the following patches:
>
> Overall I like this.
>
> However I don't want to see any transitional phase. I prefer a BIG
> fat patch converting everyone and its dog to the new vtable and
> removing the old function pointers. This can be based on the HEAD
> of my GPIO devel branch.
>

Ok, I was adding a commit per GPIO driver but the patch-set would have
been very big (~200 patches).

> It may be a good idea to use coccinelle for this refactoring in order
> not to miss any users.
>

Agreed, I was manually searching for users by using grep but I agree
that is much safer to use coccinelle for this. I don't have previous
experience writing coccinelle semantics patches though so it may take
more time than I thought but it is the perfect excuse to finally learn
how to do it :-)

Thanks a lot and best regards,
Javier

> Yours,
> Linus Walleij
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