public inbox for linux-mtd@lists.infradead.org
 help / color / mirror / Atom feed
From: Miquel Raynal <miquel.raynal@bootlin.com>
To: Chuanhong Guo <gch981213@gmail.com>
Cc: Felix Matouschek <felix@matouschek.org>, linux-mtd@lists.infradead.org
Subject: Re: [PATCH] mtd: spinand: Add support for XTX XT26G0xA
Date: Thu, 7 Apr 2022 09:50:34 +0200	[thread overview]
Message-ID: <20220407095034.2f0e623f@xps13> (raw)
In-Reply-To: <CAJsYDVJ7e4zagG9Yvu5r8dQn++ta9TpetC6YHzq4S-GBFEBABQ@mail.gmail.com>


gch981213@gmail.com wrote on Thu, 7 Apr 2022 15:09:43 +0800:

> Hi!
> 
> On Thu, Apr 7, 2022 at 12:20 AM Felix Matouschek <felix@matouschek.org> wrote:
> > The data-sheet says that only offsets 801H to 807H can be used for user
> > data and are not covered by ECC (offset 800H is reserved for the bad
> > block mark).
> >
> > The remaining 16 bytes from offset 830H to 83FH are read-only when ECC
> > is enabled, so they are of no use? Can you please advise if there is
> > something I can change?  
> 
> According to page 30 of the datasheet[0], the 64Byte OOB layout is:
> 8 bytes: OOB not protected by ECC
> 40 bytes: OOB protected by ECC
> 16 bytes: ECC parity data
> 
> so your OOB layout should be:
> ECC:
> region->offset = 48;
> region->length = 16;
> 
> Free:
> /* Reserve 1 byte for the BBM. */
> region->offset = 1;
> region->length = 47;
> 
> [0]: https://pese.oss-cn-shenzhen.aliyuncs.com/pdfs/2005251034_XTX-XT26G01AWSEGA_C558841.pdf

Agreed!

Thanks,
Miquèl

______________________________________________________
Linux MTD discussion mailing list
http://lists.infradead.org/mailman/listinfo/linux-mtd/

  reply	other threads:[~2022-04-07  7:51 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-04-01 21:29 [PATCH] mtd: spinand: Add support for XTX XT26G0xA Felix Matouschek
2022-04-04  8:41 ` Miquel Raynal
2022-04-06 16:16   ` Felix Matouschek
2022-04-07  7:09     ` Chuanhong Guo
2022-04-07  7:50       ` Miquel Raynal [this message]
2022-04-08 16:22       ` Felix Matouschek
  -- strict thread matches above, loose matches on Subject: below --
2021-07-02 19:52 Felix Matouschek
2021-12-22 11:27 ` Felix Matouschek

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20220407095034.2f0e623f@xps13 \
    --to=miquel.raynal@bootlin.com \
    --cc=felix@matouschek.org \
    --cc=gch981213@gmail.com \
    --cc=linux-mtd@lists.infradead.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox