Re: [PATCH v6 14/28] mtd: nand: mxic-ecc: Add Macronix external ECC engine support

[Miquel Raynal <miquel.raynal@bootlin.com>]

Hi Geert,

geert@linux-m68k.org wrote on Tue, 22 Feb 2022 11:39:34 +0100:

> Hi Miquel,
> 
> On Thu, Dec 16, 2021 at 12:48 PM Miquel Raynal
> <miquel.raynal@bootlin.com> wrote:
> > Some SPI-NAND chips do not support on-die ECC. For these chips,
> > correction must apply on the SPI controller end. In order to avoid
> > doing all the calculations by software, Macronix provides a specific
> > engine that can offload the intensive work.
> >
> > Add Macronix ECC engine support, this engine can work in conjunction
> > with a SPI controller and a raw NAND controller, it can be pipelined
> > or external and supports linear and syndrome layouts.
> >
> > Right now the simplest configuration is supported: SPI controller
> > external and linear ECC engine.
> >
> > Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>  
> 
> Thanks for your patch!
> 
> > --- a/drivers/mtd/nand/Kconfig
> > +++ b/drivers/mtd/nand/Kconfig
> > @@ -46,6 +46,12 @@ config MTD_NAND_ECC_SW_BCH
> >           ECC codes. They are used with NAND devices requiring more than 1 bit
> >           of error correction.
> >
> > +config MTD_NAND_ECC_MXIC
> > +       bool "Macronix external hardware ECC engine"
> > +       select MTD_NAND_ECC
> > +       help
> > +         This enables support for the hardware ECC engine from Macronix.  
> 
> I guess this is a licensable IP core, which can appear anywhere, so
> we don't have a proper platform dependency to add here?

Yes, I am not aware of any limitation on that side.

Thanks,
Miquèl