Re: [PATCH] mtd: rawnand: Allow selection of ECC byte ordering at runtime

[Miquel Raynal <miquel.raynal@xxxxxxxxxxx>]

Hi Boris,

Boris Brezillon <boris.brezillon@xxxxxxxxxxx> wrote on Tue,  4 Sep 2018
16:23:28 +0200:

> Currently, the selection of ECC byte ordering for software hamming is
> done at compilation time, which doesn't make sense when ECC byte
> calculation is done in hardware and byte ordering is forced by the
> hardware engine.
> In this case, only the correction is done and software and we want to

                                            ^ in

> force the byte-ordering no matter the value of CONFIG_MTD_NAND_ECC_SMC.
> 
> This is typically the case for the FSMC (Smart Media ordering), TMIO and
> TXX9NDFMC (regular byte ordering) blocks.
> 
> For all other use cases (pure software implementation, SM FTL and
> nandecctest), we keep selecting the byte ordering based on the
> CONFIG_MTD_NAND_ECC_SMC value. It might not be ideal for SM FTL (I'd
> expect Smart Media ordering to be employed by the Smart Media FTL), but
> this option doesn't seem to be enabled in the existing _defconfig, so
> I can't tell setting sm_order to true is the right choice.
> 
> Signed-off-by: Boris Brezillon <boris.brezillon@xxxxxxxxxxx>
> ---

Applied to nand/next with the above typo corrected.

Thanks,
Miquèl

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