linux-kernel - RE: [RFC PATCH 07/10] OMAP: GPMC: Introduce APIs for Configuring ECC Engine

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Date:	Fri, 11 Jul 2014 07:54:04 +0000
From:	"Gupta, Pekon" <pekon@...com>
To:	"Quadros, Roger" <rogerq@...com>,
	"tony@...mide.com" <tony@...mide.com>,
	"computersforpeace@...il.com" <computersforpeace@...il.com>
CC:	"javier@...hile0.org" <javier@...hile0.org>,
	"ezequiel.garcia@...e-electrons.com" 
	<ezequiel.garcia@...e-electrons.com>,
	"dwmw2@...radead.org" <dwmw2@...radead.org>,
	"jg1.han@...sung.com" <jg1.han@...sung.com>,
	"Nori, Sekhar" <nsekhar@...com>,
	"linux-mtd@...ts.infradead.org" <linux-mtd@...ts.infradead.org>,
	"linux-omap@...r.kernel.org" <linux-omap@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: RE: [RFC PATCH 07/10] OMAP: GPMC: Introduce APIs for Configuring
 ECC Engine

Hi Roger,

>From: Quadros, Roger
>
>Even though the ECC/BCH engine is meant for exclusive use by
>the OMAP NAND controller, the ECC/BCH registers belong
>to the GPMC controller's register space
>
>Add omap_gpmc_ecc_configure_enable() and omap_gpmc_ecc_disable()
>to manage the ECC engine. OMAP NAND driver must use these APIs
>instead of directly accessing the ECC Engine registers.
>
>Signed-off-by: Roger Quadros <rogerq@...com>
>---
As suggested in 
http://lists.infradead.org/pipermail/linux-mtd/2014-July/054595.html

Please try to move chip->ecc.calculate() implementations like
- omap_calculate_ecc_bch()
- omap_calculate_ecc()

>From NAND driver To GPMC driver, as that should be easy, And solve
most of your work (no need to export GPMC registers).
- You may rename them appropriately and change the argument list
   if needed.
- And NAND driver can just have some wrapper functions to match
  the MTD interface arguments.


with regards, pekon



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