Re: [PATCH v4 2/2] mtd: mediatek: driver for MTK Smart Device Gen1 NAND

John Crispin
2016-05-02T06:13:40Z

Hi,

> Your ecc-strength setting is wrong, because your nand device's OOB size
> is not enough to store 24 bit ecc parity data.
> For this nand, its ecc-strength is max 12 bit per 1024B for our
> controller.
> You can get the setting as mtk-nand DT Documentation description.

i tried 12 aswell and it also gives an error. the problem with the
documentation is that FDM is unknown to me.

> Because the ecc-size and ecc-strength settings are optional, so if you
> are not sure how to set them, you can remove the setting from DT file.

tried that just now, the driver defaults to 12 and problem remains

> In addition, can I have a check whether you have run valid nand driver
> on your platform before? Can you do a full device erase operation at
> first, then use this V4 for your test?

the SDK kernel works fine on the board using nand as a primary boot
source. i am confident that this is not a board level issue.

how would i go about doing a full device reset operation ?

John