linux-kernel - Re: [PATCH] Add support for Macronix NAND randomizer

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Date:   Mon, 2 Sep 2019 14:53:08 +0800
From:   masonccyang@...c.com.tw
To:     "Miquel Raynal" <miquel.raynal@...tlin.com>
Cc:     bbrezillon@...nel.org, computersforpeace@...il.com,
        dwmw2@...radead.org, frieder.schrempf@...tron.de,
        juliensu@...c.com.tw, kstewart@...uxfoundation.org,
        linux-kernel@...r.kernel.org, linux-mtd@...ts.infradead.org,
        marek.vasut@...il.com, richard@....at, tglx@...utronix.de,
        vigneshr@...com
Subject: Re: [PATCH] Add support for Macronix NAND randomizer

Hi Miquel, 

> > > > 
> > > > If subpage write not available with hardware ECC, for example,
> > > > NAND chip options NAND_NO_SUBPAGE_WRITE be set in driver and
> > > > randomizer function is recommended for high-reliability.
> > > > Driver checks byte 167 of Vendor Blocks in ONFI parameter page 
table
> > > > to see if this high-reliability function is supported.
> > > > 
> > > 
> > > You did not flagged this patch as a v2 and forgot about the 
changelog.
> > > You did not listen to our comments in the last version neither. I 
was
> > > open to a solution with a specific DT property for warned users but 
I
> > > don't see it coming.
> > > 
> > 
> > Based on your comments by specific DT property for randomizer support.
> > to add a new property in children nodes:
> > 
> > i.e,.
> > 
> > nand: nand-controller@...30000 {
> > 
> >                 nand@0 {
> >                         reg = <0>;
> >                         nand-reliability = "randomizer";
> 
>                           mxic,enable-randomizer-otp;
> 
> Would be better (with the proper documentation in the bindings).
> 

okay, thanks for your opinions.

best regards,
Mason

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This e-mail and any attachments may contain confidential information and/or personal data, which is protected by applicable laws. Please be reminded that duplication, disclosure, distribution, or use of this e-mail (and/or its attachments) or any part thereof is prohibited. If you receive this e-mail in error, please notify us immediately and delete this mail as well as its attachment(s) from your system. In addition, please be informed that collection, processing, and/or use of personal data is prohibited unless expressly permitted by personal data protection laws. Thank you for your attention and cooperation.

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