[U-Boot] how to configure u-boot to tell me more about NAND flash?

[Robert P. J. Day]

Quoting Scott Wood <scottwood at freescale.com>:

> On 02/05/2013 07:37:20 AM, Robert P. J. Day wrote:
>>   a few basic questions about a board i don't have access to right
>> this minute but did yesterday and will later today.  it's an AM1808
>> experimenter kit lookalike except that it has (allegedly) had its NOR
>> flash replaced with 2G of NAND flash, and i want to figure out what i
>> can add to the current u-boot da850evm configuration to let me poke
>> around and get all the info i can on that flash because there seems
>> to be something strange about the current setup.
>>
>>   first, when i let the board boot fully into linux, "dmesg" told me
>> this:
>>
>> "NAND device: Manufacturer ID: 0x2c, Chip ID: 0xdc (Micron NAND
>> 512MiB 3,3V 8-bit)"
>>
>>   that appears to tell me 512M of NAND flash, not 2G.  i asked
>> someone who was initially adamant that there was 2G but promised to
>> check with the H/W folks to make absolutely sure.  is there a
>> possible reason why 2G would show up only as 512M in dmesg?  (not
>> really a u-boot question, just wondering.)
>
> Is it possible you have 4 chips, each of which are 512 MiB?

   false alarm ... i got bad initial info and the board really does have
exactly 512M of NAND.  whew ... wasn't looking forward to trying
to debug that.

rday