[PATCH v2] mtd: spinand: add support for Dosilicon DS35Q1GA/DS35M1GA

[Miquel Raynal]

Hello Ahmed,

On 09/12/2025 at 11:16:02 +04, Ahmed Naseef <naseefkm at gmail.com> wrote:

> Add support for Dosilicon DS35Q1GA (3.3V) and DS35M1GA (1.8V) SPI NAND.
>
> These are 1Gbit (128MB) devices with:
>   - 2048 byte pages + 64 byte OOB
>   - 64 pages per block, 1024 blocks
>   - On-die 4-bit ECC per 512 byte sector
>
> The 64-byte OOB area is divided into 4 segments of 16 bytes, with each
> segment containing 8 bytes of user data (M2+M1) and 8 bytes of ECC
> parity (R1). This provides 30 bytes of usable OOB space after reserving
> 2 bytes for the bad block marker.
>
> Tested on Genexis Platinum 4410 (EcoNet EN751221) by writing known
> patterns to OOB and verifying ECC parity placement in R1 regions.
>
> Datasheet:
>   https://www.dosilicon.com/resources/SPI%20NAND/DS35X1GAXXX_rev08.pdf
>
> Signed-off-by: Ahmed Naseef <naseefkm at gmail.com>
> ---
> Changes in v2:
>   - Rebased on rc1 (updated SPINAND_OP_VARIANTS macros)

Thanks for this v2. It overall looks good to me but we are in the middle
of the merge window, so when I was saying "at -rc1" I meant "the next
one" which will be tagged next Sunday. It is probably fine as-is though,
so I'll try to apply the patch and will tell you if there are any
conflicts.

Thanks,
Miquèl