linux-kernel - RE: [LINUX PATCH v12 3/3] mtd: rawnand: arasan: Add support for Arasan NAND Flash Controller

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Date:   Fri, 28 Jun 2019 04:20:53 +0000
From:   Naga Sureshkumar Relli <nagasure@...inx.com>
To:     Miquel Raynal <miquel.raynal@...tlin.com>,
        Naga Sureshkumar Relli <nagasureshkumarrelli@...il.com>
CC:     "robh@...nel.org" <robh@...nel.org>,
        "martin.lund@...p-it-simple.com" <martin.lund@...p-it-simple.com>,
        "richard@....at" <richard@....at>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Boris Brezillon <boris.brezillon@...tlin.com>,
        "linux-mtd@...ts.infradead.org" <linux-mtd@...ts.infradead.org>,
        "nagasuresh12@...il.com" <nagasuresh12@...il.com>,
        Michal Simek <michals@...inx.com>,
        "computersforpeace@...il.com" <computersforpeace@...il.com>,
        "dwmw2@...radead.org" <dwmw2@...radead.org>,
        "marek.vasut@...il.com" <marek.vasut@...il.com>
Subject: RE: [LINUX PATCH v12 3/3] mtd: rawnand: arasan: Add support for
 Arasan NAND Flash Controller

Hi Miquel,

> -----Original Message-----
> From: Miquel Raynal <miquel.raynal@...tlin.com>
> Sent: Thursday, June 27, 2019 9:58 PM
> To: Naga Sureshkumar Relli <nagasureshkumarrelli@...il.com>
> Cc: Naga Sureshkumar Relli <nagasure@...inx.com>; robh@...nel.org; martin.lund@...p-it-
> simple.com; richard@....at; linux-kernel@...r.kernel.org; Boris Brezillon
> <boris.brezillon@...tlin.com>; linux-mtd@...ts.infradead.org; nagasuresh12@...il.com;
> Michal Simek <michals@...inx.com>; computersforpeace@...il.com; dwmw2@...radead.org;
> marek.vasut@...il.com
> Subject: Re: [LINUX PATCH v12 3/3] mtd: rawnand: arasan: Add support for Arasan NAND
> Flash Controller
> 
> Hi Naga,
> 
> Naga Sureshkumar Relli <nagasureshkumarrelli@...il.com> wrote on Tue,
> 18 Jun 2019 22:44:24 -0600:
> 
> > On Mon, Jan 28, 2019 at 10:27:39AM +0100, Miquel Raynal wrote:
> > Hi Miquel,
> >
> > > Hi Naga,
> > >
> > > Naga Sureshkumar Relli <nagasure@...inx.com> wrote on Mon, 28 Jan
> > > 2019
> > > 06:04:53 +0000:
> > >
> > > > Hi Boris & Miquel,
> > > >
> > > > Could you please provide your thoughts on this driver to support HW-ECC?
> > > > As I said previously, there is no way to detect errors beyond N bit.
> > > > I am ok to update the driver based on your inputs.
> > >
> > > We won't support the ECC engine. It simply cannot be used reliably.
> > >
> > > I am working on a generic ECC engine object. It's gonna take a few
> > > months until it gets merged but after that you could update the
> > > controller driver to drop any ECC-related function. Although the ECC
> >
> > Could you please let me know that, when can we expect generic ECC
> > engine update in mtd NAND?
> > Based on that, i will plan to update the ARASAN NAND driver along with
> > your comments mentioned above under this update, as you know there is
> > a limiation in ARASAN NAND controller to detect ECC errors.
> > i am following this series
> > https://patchwork.kernel.org/patch/10838705/
> 
> It is gonna take more time than expected. You can stick to the software engines for now.
Ok. I will update the driver accordingly.

Thanks,
Naga Sureshkumar Relli

>
 
> Thanks,
> Miquèl