[U-Boot] [U-Boot, U-boot, 1/2] common: cmd_nand: add nand ecclayout command

Ivan Khoronzhuk ivan.khoronzhuk at ti.com
Fri Jun 20 19:10:19 CEST 2014


On 06/20/2014 07:03 PM, Scott Wood wrote:
> On Fri, 2014-06-20 at 09:10 -0500, Jon Loeliger wrote:
>>>>> --- a/common/cmd_nand.c
>>>>> +++ b/common/cmd_nand.c
>>>>> @@ -462,6 +462,53 @@ static void adjust_size_for_badblocks(loff_t *size,
>>>>> +       for (i = 0; i < p->eccbytes; i++) {
>>>>> +               if (i && !(i % 9))
>>>>> +                       printf("\n    ");
>>>>> +
>>>>> +               printf("%2d ", p->eccpos[i]);
>>>>> +       }
>>>> Why 9?
>>>
>>> It's to print a new line on every 9th character position.
>>> I'll add a comment.
>> OK, Scott, breath...  I got this one.  It'll be OK...
>>
>> Ivan,
>> I am confident Scott understood that a newline would
>> be generated every ninth-character.  We all get that.  I think
>> what Scott was asking was why the value 9 was chosen?
>> Why not 10?  Or 8?  Or 145?  Was it to fit some arbitrary
>> line length or screen size?  Would it make more sense to
>> use something familiar like a base 10 or half of base-16?
> More specifically, it neither avoids a division (as a power of two
> would) nor does it seem to match the ecc size of the layouts used by the
> davinci driver (which is the only user of this so far), nor is it
> anywhere near 80 columns.
>
> Also, why is the field width two characters, when ecc positions can
> exceed 100?
>
> -Scott
>
>

Ok, I'll try to correct as you proposed. I dislike it also ...
Thanks.

-- 
Regards,
Ivan Khoronzhuk



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