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Hi,

(disclaimer: my knowledge about the ath79 SoC is pretty limited)

On Fri, Jan 25, 2019 at 10:09 PM Jeff Kletsky <l...@allycomm.com> wrote:
[...]
> * What is the level of support for QCA9531 and QCA9563 SoCs for NAND?
for SPI NAND chips the SoC has to implement an SPI controller
the NAND controller is inside the SPI NAND chip itself

some SoCs (I believe also some of the ath79 SoCs) integrate a parallel
NAND controller. this has nothing to do with the SPI NAND devices
though

this doesn't answer your question, but the question (and thus the
answer) depends on the hardware you have:
1) SPI NAND: is the SPI controller supported? and: is the SPI NAND
chip supported?
2) parallel NAND: is the SoC's NAND controller supported? and: is the
NAND chip supported?

based on your other question I believe you want to know the status of case 1)

[...]
> * Linux Kernel commit eaa76499711535fd64d747cc4ef0d78ab0fd41c
>
>      Merge tag 'mtd/for-4.21' of git://git.infradead.org/linux-mtd
>
>        SPI-NAND drivers changes:
>         - Remove the depreacated mt29f_spinand driver from staging.
>
>
> (At least that's a while off, but reinforces the unwillingness of
> upstream acceptance of keeping the mt29f_spinand driver alive.)
the mt29f_spinand driver was removed in favor of the MTD SPI NAND
driver, see [0]
(the mt29f_spinand only supported the Micron SPI NAND chips. the new
MTD SPI NAND driver implements vendor agnostic logic and hooks where
NAND manufacturer specific logic can be integrated)
4.19 was the first kernel with the MTD SPI NAND driver (that gives you
context to mkresin's comment)


Regards
Martin


[0] https://github.com/torvalds/linux/tree/master/drivers/mtd/nand/spi


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