From: Alexander Dahl <ada@thorsis.com>
To: linux-mtd@lists.infradead.org
Cc: Jupiter <jupiter.hce@gmail.com>
Subject: Re: Any UBIFS volume image installation command with selective ECC (DTB) in Linux?
Date: Wed, 20 May 2020 13:22:59 +0200 [thread overview]
Message-ID: <1861744.E9oVbb6G30@ada> (raw)
In-Reply-To: <CAA=hcWT-Noe3hk-YYs2K+WYA9b2dLtT6A5boYyf3x-3YOKr-Dg@mail.gmail.com>
Hei hei,
Am Freitag, 15. Mai 2020, 08:59:53 CEST schrieb Jupiter:
> I am baffled when ubiformat flashed ubi.img to NAND, who wrote the ECC
> to the flash?, Does ubiformat write ECC to NAND? If so, how can select
> the ECC for ubiformat to write correct ECC to NAND?
IIRC those are set in DT for Linux. You can find some information on that in
Documentation/devicetree/bindings/mtd/nand-controller.yaml – look out for
"nand-ecc", e.g.:
nand-ecc-strength = <8>;
Those settings should match the settings from your bootloader. In U-Boot those
are not necessarily set through DT however. I just checked with U-Boot 2019.10
for a sama5d2 based board, and there I find in the kconfig something like
this:
CONFIG_PMECC_CAP=8
However I do not remember, how I came up with the actual values for that
board, but I do remember I had to make sure these settings should match.
HTH & Greets
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prev parent reply other threads:[~2020-05-20 11:31 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-05-14 11:37 Any UBIFS volume image installation command with selective ECC (DTB) in Linux? Jupiter
2020-05-15 1:16 ` Jupiter
2020-05-15 6:59 ` Jupiter
2020-05-20 11:22 ` Alexander Dahl [this message]
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