linux-kernel - RE: [PATCH] mmc: MMC 4.4 DDR support

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Message-ID: <2A3DCF3DA181AD40BDE86A3150B27B6B0315FAFD01@dbde02.ent.ti.com>
Date:	Wed, 15 Sep 2010 15:02:05 +0530
From:	"Ghorai, Sukumar" <s-ghorai@...com>
To:	Chris Ball <cjb@...top.org>,
	Adrian Hunter <adrian.hunter@...ia.com>
CC:	Andrew Morton <akpm@...ux-foundation.org>,
	Matt Fleming <matt@...sole-pimps.org>,
	Linus Walleij <linus.ml.walleij@...il.com>,
	"linux-mmc@...r.kernel.org" <linux-mmc@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"STEricsson_nomadik_linux@...t.st.com" 
	<STEricsson_nomadik_linux@...t.st.com>,
	Hanumath Prasad <hanumath.prasad@...ricsson.com>,
	Kyungmin Park <kmpark@...radead.org>
Subject: RE: [PATCH] mmc: MMC 4.4 DDR support


> -----Original Message-----
> From: linux-mmc-owner@...r.kernel.org [mailto:linux-mmc-
> owner@...r.kernel.org] On Behalf Of Chris Ball
> Sent: Tuesday, September 14, 2010 4:52 PM
> To: Adrian Hunter
> Cc: Andrew Morton; Matt Fleming; Linus Walleij; linux-mmc@...r.kernel.org;
> linux-kernel@...r.kernel.org; STEricsson_nomadik_linux@...t.st.com;
> Hanumath Prasad; Kyungmin Park
> Subject: Re: [PATCH] mmc: MMC 4.4 DDR support
> 
> Hi Hanumath, Linus,
> 
> On Tue, Aug 24, 2010 at 01:30:45PM +0300, Adrian Hunter wrote:
> > I am not able to test DDR mode but it look to me that the patch
> > should be changed.  Here is a fix:
> >
> > From: Adrian Hunter <adrian.hunter@...ia.com>
> > Date: Tue, 24 Aug 2010 13:20:26 +0300
> > Subject: [PATCH] mmc: Fix Dual Data Rate (DDR) support
> 
> Could someone please test Adrian's patch and report back?  I'd like
> to merge this, but not without testing.
> 
> https://patchwork.kernel.org/patch/177332/

[Ghorai] I was testing this patch (Adrian's) and top of patch[1] from Hanumath; Looks working fine as functionality. Checking throughput in my omap platform.
[1] http://lkml.org/lkml/2010/7/9/35
But there are few comments on this patch from others, I think. And is not applying cleanly in latest codebase. Also following #define is conflicting with Hanumath's patch.
File: include/linux/mmc/host.h
#define MMC_CAP_ERASE           (1 << 10)

> 
> Thanks,
> 
> --
> Chris Ball   <cjb@...top.org>   <http://printf.net/>
> One Laptop Per Child
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