[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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