linux-kernel - Re: [RFC PATCH v3 02/16] ARM: davinci: move private EDMA API to arm/common

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Message-ID: <20121116164930.GC20006@beef>
Date:	Fri, 16 Nov 2012 11:49:30 -0500
From:	Matt Porter <mporter@...com>
To:	Sekhar Nori <nsekhar@...com>
Cc:	Linux DaVinci Kernel List 
	<davinci-linux-open-source@...ux.davincidsp.com>,
	Linux OMAP List <linux-omap@...r.kernel.org>,
	Russell King <linux@....linux.org.uk>,
	Benoit Cousson <b-cousson@...com>,
	Arnd Bergmann <arnd@...db.de>,
	Linux Documentation List <linux-doc@...r.kernel.org>,
	Tony Lindgren <tony@...mide.com>,
	Devicetree Discuss <devicetree-discuss@...ts.ozlabs.org>,
	Mark Brown <broonie@...nsource.wolfsonmicro.com>,
	Linux MMC List <linux-mmc@...r.kernel.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Rob Herring <rob.herring@...xeda.com>,
	Grant Likely <grant.likely@...retlab.ca>,
	Vinod Koul <vinod.koul@...el.com>,
	Rob Landley <rob@...dley.net>, Dan Williams <djbw@...com>,
	Linux SPI Devel List 
	<spi-devel-general@...ts.sourceforge.net>,
	Chris Ball <cjb@...top.org>,
	Linux ARM Kernel List <linux-arm-kernel@...ts.infradead.org>
Subject: Re: [RFC PATCH v3 02/16] ARM: davinci: move private EDMA API to
 arm/common

On Sun, Oct 28, 2012 at 01:47:09PM +0530, Sekhar Nori wrote:
> On 10/18/2012 6:56 PM, Matt Porter wrote:
> > Move mach-davinci/dma.c to common/edma.c so it can be used
> > by OMAP (specifically AM33xx) as well. This just moves the
> > private EDMA API but does not support OMAP.
> > 
> > Signed-off-by: Matt Porter <mporter@...com>
> > ---
> 
> > diff --git a/arch/arm/mach-davinci/devices.c b/arch/arm/mach-davinci/devices.c
> > index 4c48a36..f45d591 100644
> > --- a/arch/arm/mach-davinci/devices.c
> > +++ b/arch/arm/mach-davinci/devices.c
> > @@ -19,9 +19,10 @@
> >  #include <mach/irqs.h>
> >  #include <mach/cputype.h>
> >  #include <mach/mux.h>
> > -#include <mach/edma.h>
> >  #include <linux/platform_data/mmc-davinci.h>
> >  #include <mach/time.h>
> > +#include <linux/platform_data/edma.h>
> 
> Can you please introduce a patch to clean this mixture of linux/ and
> mach/ includes?

Sure.

> 
> > +
> >  
> >  #include "davinci.h"
> >  #include "clock.h"
> > @@ -141,10 +142,10 @@ static struct resource mmcsd0_resources[] = {
> >  	},
> >  	/* DMA channels: RX, then TX */
> >  	{
> > -		.start = EDMA_CTLR_CHAN(0, DAVINCI_DMA_MMCRXEVT),
> > +		.start = EDMA_CTLR_CHAN(0, 26),
> 
> Instead of just replacing the event #defines with plain numbers, can you
> introduce a mach-davinci local edma.h which can then be included in the
> davinci platform files which refer to edma channel numbers?

Yes.

> > diff --git a/arch/arm/plat-omap/Kconfig b/arch/arm/plat-omap/Kconfig
> > index 7cd56ed..153fab8 100644
> > --- a/arch/arm/plat-omap/Kconfig
> > +++ b/arch/arm/plat-omap/Kconfig
> > @@ -28,6 +28,7 @@ config ARCH_OMAP2PLUS
> >  	select OMAP_DM_TIMER
> >  	select PROC_DEVICETREE if PROC_FS
> >  	select SPARSE_IRQ
> > +	select TI_PRIV_EDMA
> 
> This hunk does not seem to belong to subject of this patch.

Yep, stray hunk..will move to the am335x enablement.

> >  	select USE_OF
> >  	help
> >  	  "Systems based on OMAP2, OMAP3, OMAP4 or OMAP5"
> 
> > diff --git a/include/linux/platform_data/edma.h b/include/linux/platform_data/edma.h
> > new file mode 100644
> > index 0000000..7396f0b3
> > --- /dev/null
> > +++ b/include/linux/platform_data/edma.h
> > @@ -0,0 +1,198 @@
> > +/*
> > + *  TI DAVINCI dma definitions
> > + *
> > + *  Copyright (C) 2006-2009 Texas Instruments.
> > + *
> > + *  This program is free software; you can redistribute  it and/or modify it
> > + *  under  the terms of  the GNU General  Public License as published by the
> > + *  Free Software Foundation;  either version 2 of the  License, or (at your
> > + *  option) any later version.
> > + *
> > + *  THIS  SOFTWARE  IS PROVIDED   ``AS  IS'' AND   ANY  EXPRESS OR IMPLIED
> > + *  WARRANTIES,   INCLUDING, BUT NOT  LIMITED  TO, THE IMPLIED WARRANTIES OF
> > + *  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN
> > + *  NO  EVENT  SHALL   THE AUTHOR  BE    LIABLE FOR ANY   DIRECT, INDIRECT,
> > + *  INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
> > + *  NOT LIMITED   TO, PROCUREMENT OF  SUBSTITUTE GOODS  OR SERVICES; LOSS OF
> > + *  USE, DATA,  OR PROFITS; OR  BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
> > + *  ANY THEORY OF LIABILITY, WHETHER IN  CONTRACT, STRICT LIABILITY, OR TORT
> > + *  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
> > + *  THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
> 
> > + *  You should have received a copy of the  GNU General Public License along
> > + *  with this program; if not, write  to the Free Software Foundation, Inc.,
> > + *  675 Mass Ave, Cambridge, MA 02139, USA.
> 
> This part can be dropped, I suppose ;-)

Ok :)

-Matt
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