linux-kernel - Re: [RFC PATCH v2 03/14] of: mtd: add documentation for nand-ecc-level property

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Message-Id: <20140205111500.B19FDC40A89@trevor.secretlab.ca>
Date:	Wed, 05 Feb 2014 11:15:00 +0000
From:	Grant Likely <grant.likely@...aro.org>
To:	Ezequiel Garcia <ezequiel.garcia@...e-electrons.com>,
	Boris BREZILLON <b.brezillon.dev@...il.com>
Cc:	Maxime Ripard <maxime.ripard@...e-electrons.com>,
	Rob Landley <rob@...dley.net>,
	Russell King <linux@....linux.org.uk>,
	David Woodhouse <dwmw2@...radead.org>,
	Brian Norris <computersforpeace@...il.com>,
	Jason Gunthorpe <jgunthorpe@...idianresearch.com>,
	Arnd Bergmann <arnd@...db.de>, devicetree@...r.kernel.org,
	linux-doc@...r.kernel.org, dev@...ux-sunxi.org,
	linux-kernel@...r.kernel.org, linux-mtd@...ts.infradead.org,
	linux-arm-kernel@...ts.infradead.org, Pekon Gupta <pekon@...com>
Subject: Re: [RFC PATCH v2 03/14] of: mtd: add documentation for nand-ecc-level property

On Wed, 29 Jan 2014 14:53:32 -0300, Ezequiel Garcia <ezequiel.garcia@...e-electrons.com> wrote:
> On Wed, Jan 29, 2014 at 03:34:13PM +0100, Boris BREZILLON wrote:
> > nand-ecc-level property statically defines NAND chip's ECC requirements.
> > 
> > Signed-off-by: Boris BREZILLON <b.brezillon.dev@...il.com>
> > ---
> >  Documentation/devicetree/bindings/mtd/nand.txt |    3 +++
> >  1 file changed, 3 insertions(+)
> > 
> > diff --git a/Documentation/devicetree/bindings/mtd/nand.txt b/Documentation/devicetree/bindings/mtd/nand.txt
> > index 03855c8..0c962296 100644
> > --- a/Documentation/devicetree/bindings/mtd/nand.txt
> > +++ b/Documentation/devicetree/bindings/mtd/nand.txt
> > @@ -3,5 +3,8 @@
> >  - nand-ecc-mode : String, operation mode of the NAND ecc mode.
> >    Supported values are: "none", "soft", "hw", "hw_syndrome", "hw_oob_first",
> >    "soft_bch".
> > +- nand-ecc-level : Two cells property defining the ECC level requirements.
> > +  The first cell represent the strength and the second cell the ECC block size.
> > +  E.g. : nand-ecc-level = <4 512>; /* 4 bits / 512 bytes */
> >  - nand-bus-width : 8 or 16 bus width if not present 8
> >  - nand-on-flash-bbt: boolean to enable on flash bbt option if not present false
> 
> Hm.. when was this proposal agreed? It seems I've missed the
> discussion...
> 
> FWIW, we've already proposed an equivalent one, but it received no
> feedback from the devicetree maintainers:

Sorry, binding review has become a huge undertaking.

> 
> http://comments.gmane.org/gmane.linux.drivers.devicetree/58764
> 
> Maybe we can discuss about it now?
> 
>   nand-ecc-strength : integer ECC required strength.
>   nand-ecc-size : integer step size associated to the ECC strength.

I'm okay with either, but the above binding is indeed more readable.

g.
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