linux-kernel - Re: [V2 1/2] powerpc: mpc512x_dma: add support for data transfers between memory and i/o memory

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Message-ID: <20130712153205.GI2615@book.gsilab.sittig.org>
Date:	Fri, 12 Jul 2013 17:32:05 +0200
From:	Gerhard Sittig <gsi@...x.de>
To:	Alexander Popov <a13xp0p0v88@...il.com>,
	Vinod Koul <vinod.koul@...el.com>, Dan Williams <djbw@...com>,
	linuxppc-dev@...ts.ozlabs.org, linux-kernel@...r.kernel.org,
	lars@...afoo.de
Subject: Re: [V2 1/2] powerpc: mpc512x_dma: add support for data transfers
 between memory and i/o memory

On Fri, Jul 12, 2013 at 14:14 +0200, Gerhard Sittig wrote:
> 
> We shall combine the parts which currently are floating around.
> So that others aren't supposed to pick up pieces but instead can
> use a series and get something consistent.
> 
> Here are the parts that I'm aware of:
> - Anatolij's work that was motivated by SD card support, the
>   mxcmmc(4) part went mainline, the DMA part did not (patchwork
>   2368581, 2368591)
> - Lars' work on OF support that was motivated by a different
>   platform but is useful for the MPC512x as well (2331091)
> - your Alex' work that is motivated by SCLPC support is currently
>   under review (while the DMA part appears to re-use Anatolij's
>   approach?)
> - my local work that's picking up Anatolij's previous work and
>   includes items which are unrelated to DMA yet are helpful here
>   (MPC512x common clock support, preprocessor use in DTS builds)
> 
> So I suggest that I create an RFC series which combines those
> parts that I consider "DMA related", which you can in turn put
> your SCLPC support onto, or pick it up and fold it into yours.
> The latter may be more appropriate since announcing something via
> OF is only useful after implementing the support (here: slave
> S/G in the DMA engine).

for the record: the series was just sent out

  From: Gerhard Sittig <gsi@...x.de>
  To: linuxppc-dev@...ts.ozlabs.org,
	  devicetree-discuss@...ts.ozlabs.org,
	  Alexander Popov <a13xp0p0v88@...il.com>
  Cc: Dan Williams <djbw@...com>,
	  Vinod Koul <vinod.koul@...el.com>,
	  Lars-Peter Clausen <lars@...afoo.de>,
	  Arnd Bergmann <arnd@...db.de>,
	  Anatolij Gustschin <agust@...x.de>,
	  Gerhard Sittig <gsi@...x.de>
  Subject: [PATCH RFC 0/8] MPC512x DMA slave s/g support, OF DMA lookup
  Date: Fri, 12 Jul 2013 17:26:13 +0200
  Message-Id: <1373642781-32631-1-git-send-email-gsi@...x.de>


virtually yours
Gerhard Sittig
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