linux-kernel - Re: [PATCH v4 2/7] ARM: imx6q: add iomuxc gpr support into syscon

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Date:	Mon, 3 Sep 2012 10:46:06 +0800
From:	Dong Aisheng <b29396@...escale.com>
To:	Shawn Guo <shawn.guo@...aro.org>
CC:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	"linus.walleij@...ricsson.com" <linus.walleij@...ricsson.com>,
	"s.hauer@...gutronix.de" <s.hauer@...gutronix.de>,
	"kernel@...gutronix.de" <kernel@...gutronix.de>,
	"grant.likely@...retlab.ca" <grant.likely@...retlab.ca>,
	"rob.herring@...xeda.com" <rob.herring@...xeda.com>,
	"sameo@...ux.intel.com" <sameo@...ux.intel.com>,
	"lrg@...com" <lrg@...com>,
	"broonie@...nsource.wolfsonmicro.com" 
	<broonie@...nsource.wolfsonmicro.com>,
	Zhao Richard-B20223 <B20223@...escale.com>,
	"devicetree-discuss@...ts.ozlabs.org" 
	<devicetree-discuss@...ts.ozlabs.org>,
	"swarren@...dotorg.org" <swarren@...dotorg.org>
Subject: Re: [PATCH v4 2/7] ARM: imx6q: add iomuxc gpr support into syscon

On Fri, Aug 31, 2012 at 10:02:48AM +0800, Shawn Guo wrote:
> On Wed, Aug 29, 2012 at 06:56:53PM +0800, Dong Aisheng wrote:
> > From: Dong Aisheng <dong.aisheng@...aro.org>
> > 
> > Include headfile for easy using.
> > 
> > Acked-by: Stephen Warren <swarren@...dotorg.org>
> > Signed-off-by: Dong Aisheng <dong.aisheng@...aro.org>
> > ---
> >  arch/arm/boot/dts/imx6q.dtsi         |    5 +
> >  include/linux/fsl/imx6q-iomuxc-gpr.h |  319 ++++++++++++++++++++++++++++++++++
> 
> I assume that all the users of this header file are imx6q syscon
> clients.  In that case, this header belongs to mfd/syscon subsystem.
> 
> I have been told by people that it was a mistake to create
> include/linux/fsl.  Each header in include/linux should go to
> respective subsystem sub-directory.  For this particular case,
> it should be include/linux/mfd or include/linux/mfd/syscon even
> better, IMO.
> 
I like the later one if not put in include/linux/fsl. :)

> > +#define IMX6Q_GPR13_SATA_PHY_1_MED		(0x1 << 0)
> > +#define IMX6Q_GPR13_SATA_PHY_1_SLOW		(0x2 << 0)
> > +
> > +#endif /* !__LINUX_IMX6Q_IOMUXC_GPR_H */
> 
> Nit: why do we have a "!" there?
> 
You're right.
We do not need a '!' for such macro.
Sorry for my mistake.

Regards
Dong Aisheng

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