[U-Boot] [PATCH v7 1/5] mtd: nand: omap: enable BCH ECC scheme using ELM for generic platform

[Tom Rini]

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On 10/07/2013 09:06 PM, Scott Wood wrote:
> On Sat, 2013-10-05 at 06:11 +0000, Gupta, Pekon wrote:
>> Hi,
>> Please see the replies inline..
>>
>>> From: Scott Wood [mailto:scottwood at freescale.com]
>>>> On Mon, 2013-09-30 at 19:43 +0530, Pekon Gupta wrote:
>>>> +Platform specific options
>>>> +=========================
>>>> +
>>>> +   CONFIG_NAND_OMAP_ECCSCHEME
>>>> +	On OMAP platforms, this specifies NAND ECC scheme.
>>>> +	1 - HAM1_SW	1-bit Hamming code using software library
>>>> +			(for legacy devices only)
>>>> +	2 - HAM1_HW	1-bit Hamming code using GPMC hardware engine
>>>> +			(for legacy devices only)
>>>> +	3 - BCH4_SW	4-bit BCH code (unsupported)
>>>> +	4 - BCH4_HW	4-bit BCH code (unsupported)
>>>> +	5 - BCH8_SW	8-bit BCH code with
>>>> +			- ecc calculation using GPMC hardware engine,
>>>> +			- error detection using software library.
>>>> +			- requires CONFIG_BCH to enable software BCH
>>> library
>>>> +			(For legacy device which do not have ELM h/w
>>> engine)
>>>> +	6 - BCH8_HW	8-bit BCH code with
>>>> +			- ecc calculation using GPMC hardware engine,
>>>> +			- error detection using ELM hardware engine.
>>>
>>> You should document the symbols, not the numbers that happen to be
>>> assigned to them.
>>>
>> Sorry din't get you. This is based on your below feedback
>> http://lists.denx.de/pipermail/u-boot/2013-September/162773.html
>>
>> Example: "6 - BCH8_HW" means 8-bit BCH ECC scheme using h/w engine.
>> It is this number is what user needs to specify in include/configs/*.h
>> Any other internal symbol like "OMAP_ECC_BCH8_CODE_SW" should
>> not be exposed to user, user-interface should remain constant.
> 
> I disagree.  The user should specify OMAP_ECC_BCH8_CODE_SW.  It's more
> greppable, and it's more likely that the number will change than that
> the name will.

I agree with Scott, enum (if it's not already one) and use the name so
it's clear what you're picking.

- -- 
Tom
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