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Date:	Fri, 4 Jul 2008 17:22:35 +0400
From:	Dmitry Baryshkov <dbaryshkov@...il.com>
To:	Takashi Iwai <tiwai@...e.de>
Cc:	Stephen Rothwell <sfr@...b.auug.org.au>,
	David Brownell <david-b@...bell.net>,
	linux-next@...r.kernel.org, LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] fix build error of driver/mfd/tc6393xb.c

On Fri, Jul 04, 2008 at 02:59:18PM +0200, Takashi Iwai wrote:
> At Fri, 4 Jul 2008 16:42:56 +0400,
> Dmitry Baryshkov wrote:
> > 
> > On Fri, Jul 04, 2008 at 02:04:30PM +0200, Takashi Iwai wrote:
> > > At Fri, 4 Jul 2008 15:47:55 +0400,
> > > Dmitry Baryshkov wrote:
> > > > 
> > > > On Fri, Jul 04, 2008 at 01:20:42PM +0200, Takashi Iwai wrote:
> > > > > Fix the build of tc6393xb  due to missing definition of struct
> > > > > gpio_chip.
> > > > > 
> > > > > Signed-off-by: Takashi Iwai <tiwai@...e.de>
> > > > > 
> > > > > ---
> > > > > diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
> > > > > index 9f93c29..2981da4 100644
> > > > > --- a/drivers/mfd/Kconfig
> > > > > +++ b/drivers/mfd/Kconfig
> > > > > @@ -44,7 +44,7 @@ config HTC_PASIC3
> > > > >  
> > > > >  config MFD_TC6393XB
> > > > >  	bool "Support Toshiba TC6393XB"
> > > > > -	depends on HAVE_GPIO_LIB
> > > > > +	depends on HAVE_GPIO_LIB && GENERIC_GPIO
> > > > >  	select MFD_CORE
> > > > >  	help
> > > > >  	  Support for Toshiba Mobile IO Controller TC6393XB
> > > > 
> > > > Which configuration does provide HAVE_GPIO_LIB but not GENERIC_GPIO?
> > > 
> > > The below is the config with which I got the error.
> > 
> > The proper fix probably is to make PPC_MPC5200_GPIO also select
> > GENERIC_GPIO. I don't think that building GPIO_LIB w/o GENERIC_GPIO
> > should be supported.
> 
> [Added David to Cc]
> 
> Then HAVE_GPIO_LIB should depend on GENERIC_GPIO.
> Or, linux/gpio.h should be fixed so that the code can be built
> properly without GENERIC_GPIO.

IIRC selected symbols don't propagate their depends.
Also linux/gpio.h don't have anything in common with HAVE_GPIO_LIB.

-- 
With best wishes
Dmitry

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