From mboxrd@z Thu Jan  1 00:00:00 1970
From: Arnd Bergmann <arnd@arndb.de>
To: "Gupta, Pekon" <pekon@ti.com>
Subject: Re: [PATCH 21/21] mtd: omap2: allow bulding as a module
Date: Mon, 29 Apr 2013 15:34:10 +0200
References: <1366734653-488286-1-git-send-email-arnd@arndb.de>
 <20130423180320.GJ10155@atomide.com>
 <20980858CB6D3A4BAE95CA194937D5E73E9BCFAE@DBDE04.ent.ti.com>
In-Reply-To: <20980858CB6D3A4BAE95CA194937D5E73E9BCFAE@DBDE04.ent.ti.com>
MIME-Version: 1.0
Content-Type: Text/Plain;
  charset="iso-8859-1"
Content-Transfer-Encoding: 7bit
Message-Id: <201304291534.10539.arnd@arndb.de>
Cc: "Mohammed, Afzal" <afzal@ti.com>, Tony Lindgren <tony@atomide.com>,
 Artem Bityutskiy <artem.bityutskiy@linux.intel.com>,
 "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
 "linux-mtd@lists.infradead.org" <linux-mtd@lists.infradead.org>,
 Russell King <rmk+kernel@arm.linux.org.uk>,
 David Woodhouse <dwmw2@infradead.org>,
 "linux-arm-kernel@lists.infradead.org" <linux-arm-kernel@lists.infradead.org>
List-Id: Linux MTD discussion mailing list <linux-mtd.lists.infradead.org>
List-Unsubscribe: <http://lists.infradead.org/mailman/options/linux-mtd>,
 <mailto:linux-mtd-request@lists.infradead.org?subject=unsubscribe>
List-Archive: <http://lists.infradead.org/pipermail/linux-mtd/>
List-Post: <mailto:linux-mtd@lists.infradead.org>
List-Help: <mailto:linux-mtd-request@lists.infradead.org?subject=help>
List-Subscribe: <http://lists.infradead.org/mailman/listinfo/linux-mtd>,
 <mailto:linux-mtd-request@lists.infradead.org?subject=subscribe>

On Wednesday 24 April 2013, Gupta, Pekon wrote:
> [Pekon]: 
> ELM module is required in for Hardware based ECC correction for 
> NAND devices. And this driver has a very small foot-print.
> 
> The only cases this drives would not be used are:
> (a) Using S/W based ECC scheme, which have vey high CPU utilization
> (b) Using single bit ECC scheme, which are becoming obsolete due to
>  increasing NAND densities.
> For most of the cases ELM module will be used with nand-driver. So
> there should be no harm in having this module as built-in, if not used
> in 10% of the use-cases.
> 
> Thus I think it's better to keep this module tied to GPMC module, 
> rather than independent control via KConfig.
> And user should just selects which ECC scheme he would like to
> use via DT, without worrying about KConfig options.

Sorry, I'm lost here and have no idea what you are actually suggesting
we do. Can you phrase that as a patch?

Unless you come up with a better solution, I would still like to queue
up my patch since it fixes an annoying bug and seems to have no downsides.
 
> I'm working in cleaning up omap2-nand driver to remove some 
> redundancies. So would like to know your feedback on same..

Sure, just Cc me on your patches.

	Arnd