[PATCH] mtd: spinand: Add support for XTX XT26G0xA

[Chuanhong Guo]

Hi!

On Thu, Apr 7, 2022 at 12:20 AM Felix Matouschek <felix at 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
-- 
Regards,
Chuanhong Guo