linux-kernel - Re: [PATCH v2 2/4] dma: move dw_dmac driver to an own directory

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Date:	Wed, 12 Jun 2013 13:42:02 +0530
From:	Vinod Koul <vinod.koul@...el.com>
To:	Andy Shevchenko <andy.shevchenko@...il.com>
Cc:	Andy Shevchenko <andriy.shevchenko@...ux.jf.intel.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	spear-devel <spear-devel@...t.st.com>,
	Viresh Kumar <viresh.kumar@...aro.org>,
	Arnd Bergmann <arnd@...db.de>, Felipe Balbi <balbi@...com>
Subject: Re: [PATCH v2 2/4] dma: move dw_dmac driver to an own directory

On Wed, Jun 12, 2013 at 11:38:37AM +0300, Andy Shevchenko wrote:
> On Wed, Jun 12, 2013 at 10:52 AM, Vinod Koul <vinod.koul@...el.com> wrote:
> > On Wed, Jun 12, 2013 at 11:27:51AM +0300, Andy Shevchenko wrote:
> >> On Wed, Jun 12, 2013 at 10:39 AM, Vinod Koul <vinod.koul@...el.com> wrote:
> >>
> >> []
> >>
> >> > Something like
> >> > config DW_DMAC_BIG_ENDIAN_IO
> >> >         tristate
> >> >
> >> > config DW_DMAC
> >> >         select DW_DMAC_BIG_ENDIAN_IO
> >> >
> >> > I belive DW_DMAC is for AVR support and the PCI ones is different right.
> >> > The point is that these things should be selected by the required symbols based
> >> > on what ARCH we are on and not be prompted for user to configure via menuconfig
> >>
> >> DW_DMAC is a generic platform driver which supports AVR32, ARM and
> >> Intel (ACPI case) platforms.
> >>
> >> We may do that option invisible to user
> > Yup
> >>
> >> and then use
> >>
> >> config DW_DMAC
> >>          select DW_DMAC_BIG_ENDIAN_IO if ARCH=AVR32
> > Thats would be the right way
> 
> Do you prefer to have this as separate patch or integrated in the split?
> In my humble opinion I better to do separate patch.
Never mind, am applying your patches and below fix, let me if you guys are okay

diff --git a/drivers/dma/dw/Kconfig b/drivers/dma/dw/Kconfig
index db2b41f..7be1cf8 100644
--- a/drivers/dma/dw/Kconfig
+++ b/drivers/dma/dw/Kconfig
@@ -10,6 +10,7 @@ config DW_DMAC_CORE
 config DW_DMAC
 	tristate "Synopsys DesignWare AHB DMA platform driver"
 	select DW_DMAC_CORE
+	select DW_DMAC_BIG_ENDIAN_IO if ARCH=AVR32
 	default y if CPU_AT32AP7000
 	help
 	  Support the Synopsys DesignWare AHB DMA controller. This
@@ -25,12 +26,4 @@ config DW_DMAC_PCI
 	  Intel Medfield has integrated this GPDMA controller.
 
 config DW_DMAC_BIG_ENDIAN_IO
-	bool "Use big endian I/O register access"
-	default y if AVR32
-	depends on DW_DMAC_CORE
-	help
-	  Say yes here to use big endian I/O access when reading and writing
-	  to the DMA controller registers. This is needed on some platforms,
-	  like the Atmel AVR32 architecture.
-
-	  If unsure, use the default setting.
+	bool
-

--
~Vinod
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