Hi, Takahiro!
On 4/15/24 05:33, [email protected] wrote: > From: Takahiro Kuwano <[email protected]> > > Some flashes like the Infineon SEMPER NOR flash family use ECC. Under > this ECC scheme, multi-pass writes to an ECC block is not allowed. > In other words, once data is programmed to an ECC block, it can't be > programmed again without erasing it first. > > Upper layers like file systems need to be given this information so they > do not cause error conditions on the flash by attempting multi-pass > programming. This can be done by setting 'writesize' in 'struct > mtd_info'. > > Set the default to 1 but allow flashes to modify it in fixup hooks. If > more flashes show up with this constraint in the future it might be > worth it to add it to 'struct flash_info', but for now increasing its > size is not worth it. > > Signed-off-by: Takahiro Kuwano <[email protected]> Please specify when a patch follows linux upstream. This follows the following upstream linux commit: afd473e85827 ("mtd: spi-nor: core: Allow flashes to specify MTD writesize") Acked-by: Tudor Ambarus <[email protected]>
