linux-kernel - Re: [PATCH v7 0/5] mfd: tps65912: Driver rewrite with DT support

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Message-ID: <CACRpkdZU3RrXmPr1fDzCMumhQ8nWEf126iC1rDu=xiLFj7DU+A@mail.gmail.com>
Date:	Wed, 9 Dec 2015 13:35:00 +0100
From:	Linus Walleij <linus.walleij@...aro.org>
To:	Mark Brown <broonie@...nel.org>
Cc:	"Andrew F. Davis" <afd@...com>, Lee Jones <lee.jones@...aro.org>,
	Rob Herring <robh+dt@...nel.org>,
	Pawel Moll <pawel.moll@....com>,
	Mark Rutland <mark.rutland@....com>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	Kumar Gala <galak@...eaurora.org>,
	Alexandre Courbot <gnurou@...il.com>,
	Samuel Ortiz <sameo@...ux.intel.com>,
	Liam Girdwood <lgirdwood@...il.com>,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
	"linux-gpio@...r.kernel.org" <linux-gpio@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v7 0/5] mfd: tps65912: Driver rewrite with DT support

On Tue, Dec 8, 2015 at 8:16 PM, Mark Brown <broonie@...nel.org> wrote:
> On Mon, Dec 07, 2015 at 01:58:47PM -0600, Andrew F. Davis wrote:
>
>> As all of this driver should be taken though the MFD tree how
>> can this gpiolib change be handled? If we have gpio.parent it
>> will not build on MFD, with gpio.dev it will fail to build when
>> the changes are merged from the gpio subsystem. As the change
>> has not been merged into linux-next as far a I can tell maybe
>> this should be taken as is, then when the gpiolib change is
>> made this can be changed with all the other drivers?
>
> Do a cross tree merge in one direction or the other between MFD and GPIO.

If Lee makes an immutable branch with this stuff on it I can
pull that in and put a fix on top of it (like I recently did with
the ASoC AC97 codec). I have "only" renamed
the .dev field of struct gpio_chip to .parent but I'm bombing
out another 150 or so patches today, ridding all GPIO drivers
in the kernel of container_of().

A bit painful but nothing to what tglx has gone through for
refactoring IRQ chips...

Yours,
Linus Walleij
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