Re: [PATCH v4 2/9] dt-bindings: mtd: ingenic: Change 'BCH' to 'ECC' in documentation

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Le lun. 4 mars 2019 à 15:58, Miquel Raynal <miquel.raynal@xxxxxxxxxxx> a écrit :
Hi Paul,

Paul Cercueil <paul@xxxxxxxxxxxxxxx> wrote on Mon, 04 Mar 2019 19:23:50
+0100:

On Mon, Mar 4, 2019 at 10:50 AM, Miquel Raynal <miquel.raynal@xxxxxxxxxxx> wrote:
 > Hi Paul,
 >
> Paul Cercueil <paul@xxxxxxxxxxxxxxx <mailto:paul@xxxxxxxxxxxxxxx>> > wrote on Sat, 9 Feb 2019 16:22:58
 > -0300:
 >
>> The JZ4740 ECC hardware is not BCH but Reed-Solomon, so it makes >> more
 >>  sense to use the more generic ECC term.
>> >> Signed-off-by: Paul Cercueil <paul@xxxxxxxxxxxxxxx >> <mailto:paul@xxxxxxxxxxxxxxx>>
 >>  ---
 >> >>  Changes:
 >> >>  v3: New patch
 >> >>  v4: No change
>> >> .../devicetree/bindings/mtd/ingenic,jz4780-nand.txt | 18 >> +++++++++---------
 >>   1 file changed, 9 insertions(+), 9 deletions(-)
>> >> diff --git >> a/Documentation/devicetree/bindings/mtd/ingenic,jz4780-nand.txt >> b/Documentation/devicetree/bindings/mtd/ingenic,jz4780-nand.txt
 >>  index a5b940f18bf6..5a45cc54f46d 100644
>> --- a/Documentation/devicetree/bindings/mtd/ingenic,jz4780-nand.txt >> +++ b/Documentation/devicetree/bindings/mtd/ingenic,jz4780-nand.txt
 >>  @@ -1,4 +1,4 @@
 >>  -* Ingenic JZ4780 NAND/BCH
 >>  +* Ingenic JZ4780 NAND/ECC
>> >> This file documents the device tree bindings for NAND flash >> devices on the >> JZ4780. NAND devices are connected to the NEMC controller >> (described in
 >>  @@ -14,10 +14,10 @@ Required NAND controller device properties:
>> an offset of 0 and a size of 0x1000000 (i.e. the whole NEMC >> bank).
 >> >>   Optional NAND controller device properties:
>> -- ingenic,bch-controller: To make use of the hardware BCH >> controller, this >> - property must contain a phandle for the BCH controller node. The >> required >> +- ingenic,bch-controller: To make use of the hardware ECC >> controller, this >> + property must contain a phandle for the ECC controller node. The >> required
 >
> I think there is already a 'ecc-engine' property used by MTK and Atmel
 > NAND controllers to point to the ECC engine block. Please use this
 > property instead of the ingenic specific one.

ingenic,bch-controller is already in the devicetree ABI. I can't change it now...

Oh, right...

Well, same thing as before, maybe you can change it and keep the driver
backward compatible? I don't want new DT to use this property because
it is not generic and we must have a way from the core to find the ECC
engine handle when the controller does not embed one itself (thus, the
ecc-engine property which is around for quite some time already).

I can do that. Will the new ECC framework work with the "ecc-engine" property?

-Paul





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