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From: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Date: Mon, 29 Jul 2019 19:41:04 +0200
Message-ID: <CAFBinCCKwCaC9h5eB8bXeFxV85RCtqC_weozF-wFVrMymBgTFQ@mail.gmail.com>
Subject: Re: [OpenWrt-Devel] Problem reading flash zones in ath79
To: Enrico Mioso <mrkiko.rs@gmail.com>
Cc: openwrt-devel@lists.openwrt.org
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Hi Enrico,

On Mon, Jul 29, 2019 at 3:40 PM Enrico Mioso <mrkiko.rs@gmail.com> wrote:
>
> Hello guys!
>
> I experienced an issue where I wasn't able to read all of a flash region on an ATH79 device, the Archer C60 V2.
> Taking a look, it seems the MTD layer will return only 512-bytes when reading an mtd device via the mtdblock layer.
I believe that this is related to the erase/write size of the flash on
your device (see /sys/class/mtd/*/{erase,write}size).

> So, in the case of my Archer C60 V2:
> - the first partition, "factory-boot" won't be completely readable (256 bytes will be missing)
> - sameholds for "mac" partition
> - same holds for the "u-boot" partition
>
> This will prevent users from making proper backups of their devices.
> Should this be fixed on the mtd layer or on thedevicetrees we're using?
> Of course I don't think this is ath79 specific...
I suggest to also ask on the linux-mtd mailing list if you don't get
an answer here or before you spend time coding: [0]


Martin


[0] http://lists.infradead.org/mailman/listinfo/linux-mtd

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