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

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Date:   Mon, 28 Jan 2019 09:35:51 +0000
From:   Naga Sureshkumar Relli <nagasure@...inx.com>
To:     Miquel Raynal <miquel.raynal@...tlin.com>
CC:     "robh@...nel.org" <robh@...nel.org>,
        "marek.vasut@...il.com" <marek.vasut@...il.com>,
        "richard@....at" <richard@....at>,
        "martin.lund@...p-it-simple.com" <martin.lund@...p-it-simple.com>,
        "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>
Subject: RE: [LINUX PATCH v12 3/3] mtd: rawnand: arasan: Add support for
 Arasan NAND Flash Controller

Hi Miquel,


> -----Original Message-----
> From: Miquel Raynal [mailto:miquel.raynal@...tlin.com]
> Sent: Monday, January 28, 2019 2:58 PM
> To: Naga Sureshkumar Relli <nagasure@...inx.com>
> Cc: robh@...nel.org; marek.vasut@...il.com; richard@....at; martin.lund@...p-it-
> simple.com; 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
> Subject: Re: [LINUX PATCH v12 3/3] mtd: rawnand: arasan: Add support for Arasan
> NAND Flash Controller
> 
> 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 engine part is blocking, raw access still look wrong and the
> driver still needs changes.

Thank you for the update.
Yes, currently ECC engine part is blocking.
Also whenever you have time, please provide your comments to the driver v12 patch.
I will update those.

Thanks,
Naga Sureshkumar Relli
> 
> 
> Thanks,
> Miquèl