[U-Boot] [PATCH v2 5/5] cgtqmx6eval: Protect the manufacturing information in SPI NOR

[Otavio Salvador]

On Tue, Sep 22, 2015 at 4:11 PM, Jagan Teki <jteki at openedev.com> wrote:
> On 12 September 2015 at 19:27, Otavio Salvador <otavio at ossystems.com.br> wrote:
>> +static void spinor_protect(void)
>> +{
>> +       struct spi_flash *spi;
>> +
>> +       spi = spi_flash_probe(CONFIG_ENV_SPI_BUS, CONFIG_ENV_SPI_CS,
>> +                             CONFIG_ENV_SPI_MAX_HZ, CONFIG_ENV_SPI_MODE);
>> +       /*
>> +        * Set BP2 BP1 BP0 to 001, so that the last 64 sectors
>> +        * can be protected (0x3f0000 to 0x3fffff).
>
> The last sector (64*1024) area is being protected here, why? does this
> specific to your board?
> And also your taking an example of  (0x3f0000 to 0x3fffff) that means
> the flash your using is 4MB is it? then this again becomes your board
> specific? is it?

Yes, the protected range is board specific. Congatec put some data in
this area which are valuable and should not be erased. So we need to
protect it.

-- 
Otavio Salvador                             O.S. Systems
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