Re: [PATCH v6 16/18] mtd: nand: Convert generic NAND bits to use the ECC framework

[Boris Brezillon <boris.brezillon@xxxxxxxxxxxxx>]

On Thu, 28 May 2020 16:49:26 +0200
Miquel Raynal <miquel.raynal@xxxxxxxxxxx> wrote:

> Boris Brezillon <boris.brezillon@xxxxxxxxxxxxx> wrote on Thu, 28 May
> 2020 16:39:07 +0200:
> 
> > On Thu, 28 May 2020 13:31:11 +0200
> > Miquel Raynal <miquel.raynal@xxxxxxxxxxx> wrote:
> >   
> > > Embed a generic NAND ECC high-level object in the nand_device
> > > structure to carry all the ECC engine configuration/data. Adapt the
> > > raw NAND and SPI-NAND cores to fit the change.
> > > 
> > > Signed-off-by: Miquel Raynal <miquel.raynal@xxxxxxxxxxx>
> > > ---
> > >  drivers/mtd/nand/Kconfig                     |  1 +
> > >  drivers/mtd/nand/raw/atmel/nand-controller.c |  9 +++--
> > >  drivers/mtd/nand/raw/brcmnand/brcmnand.c     |  7 ++--
> > >  drivers/mtd/nand/raw/gpmi-nand/gpmi-nand.c   | 12 +++---
> > >  drivers/mtd/nand/raw/marvell_nand.c          |  7 ++--
> > >  drivers/mtd/nand/raw/mtk_nand.c              |  4 +-
> > >  drivers/mtd/nand/raw/nand_base.c             | 25 ++++++------
> > >  drivers/mtd/nand/raw/nand_esmt.c             | 11 +++---
> > >  drivers/mtd/nand/raw/nand_hynix.c            | 41 ++++++++++----------
> > >  drivers/mtd/nand/raw/nand_jedec.c            |  4 +-
> > >  drivers/mtd/nand/raw/nand_micron.c           | 14 ++++---
> > >  drivers/mtd/nand/raw/nand_onfi.c             |  8 ++--
> > >  drivers/mtd/nand/raw/nand_samsung.c          | 19 ++++-----
> > >  drivers/mtd/nand/raw/nand_toshiba.c          | 11 +++---
> > >  drivers/mtd/nand/raw/sunxi_nand.c            |  5 ++-
> > >  drivers/mtd/nand/raw/tegra_nand.c            |  9 +++--
> > >  drivers/mtd/nand/spi/core.c                  |  8 ++--
> > >  drivers/mtd/nand/spi/macronix.c              |  6 +--
> > >  drivers/mtd/nand/spi/toshiba.c               |  6 +--
> > >  include/linux/mtd/nand.h                     |  8 ++--
> > >  20 files changed, 115 insertions(+), 100 deletions(-)
> > > 
> > > diff --git a/drivers/mtd/nand/Kconfig b/drivers/mtd/nand/Kconfig
> > > index a4478ffa279d..3327d8539a73 100644
> > > --- a/drivers/mtd/nand/Kconfig
> > > +++ b/drivers/mtd/nand/Kconfig
> > > @@ -13,6 +13,7 @@ menu "ECC engine support"
> > >  
> > >  config MTD_NAND_ECC
> > >  	bool
> > > +	select MTD_NAND_CORE    
> > 
> > This select looks suspicious. Shouldn't it be a depends on, and more
> > importantly, I think it should be part of patch 15.  
> 
> Wouldn't we break a lot of users by using depends on?
> 
> Or maybe we can turn it on by default?

It's a sub-functionality of the NAND core, so it should be a depends on
in my opinion. Why would that break users. Aren't you selecting
MTD_NAND_CORE in MTD_RAWNAND now? Those options should really remain
hidden, and be selected at the SPI/raw NAND framework level.

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