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 12:07:24 +0300
From:	Andy Shevchenko <andy.shevchenko@...il.com>
To:	Vinod Koul <vinod.koul@...el.com>
Cc:	Viresh Kumar <viresh.kumar@...aro.org>,
	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>,
	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 11:19 AM, Vinod Koul <vinod.koul@...el.com> wrote:
> On Wed, Jun 12, 2013 at 02:23:39PM +0530, Viresh Kumar wrote:
>> On 12 June 2013 13:42, Vinod Koul <vinod.koul@...el.com> wrote:
>>
>> > Never mind, am applying your patches and below fix, let me if you guys are okay
>>
>> I am not :)

I

>>
>> > 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.
>>
>> This information was useful to understand this config option and must
>> be kept in some way.
> Well now the config option is not selected by users, so they dont need to know.
> It was useful in knowing what to select earlier
>
> For documenting, we can add this in commit log or better in driver code where
> you use this

The driver is better place if you decide to move it (drivers/dma/dw/regs.h).

--
With Best Regards,
Andy Shevchenko
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