Re: [PATCH] mtd: spinand: fmsh: fix FM25G01B/FM25G02B Quad I/O read dummy cycles
Miquel Raynal <[email protected]>
| Newsgroups | org.infradead.lists.linux-mtd,org.kernel.vger.linux-kernel |
|---|---|
| Message-ID | <[email protected]> |
Hi Aleksandr, On 15/07/2026 at 23:36:02 +03, Aleksandr Mineev <[email protected]> wrote: > The FM25G01B/FM25G02B datasheets specify a single dummy byte for the > 0xEB Quad I/O read-from-cache operation, but the generic > read_cache_variants set uses two dummy bytes for the 1S-4S-4S variant. > The extra dummy byte shifts the data phase and returns corrupted data > with no ECC error, breaking boot on boards using these chips. > > Use a dedicated read-from-cache variant set with ndummy=1 for the > 1S-4S-4S (0xEB) operation. > > FM25G01B datasheet: https://www.fmsh.com/nvm/FM25G01B_ds_eng.pdf > FM25G02B datasheet: https://www.fmsh.com/nvm/FM25G02B_ds_eng.pdf > > Fixes: d5a5c9eb2ee9 ("mtd: spinand: fmsh: add support for FM25G{01,02}B") Missing Cc: stable tag. > Signed-off-by: Aleksandr Mineev <[email protected]> Otherwise LGTM. Thanks, Miquèl ______________________________________________________ Linux MTD discussion mailing list http://lists.infradead.org/mailman/listinfo/linux-mtd/