[U-Boot] [PATCH 03/10] mx23evk: Adjust DRAM control register to use full 128MB of RAM

Otavio Salvador
2013-01-30T15:46:44Z

On Wed, Jan 30, 2013 at 1:38 PM, Marek Vasut <marex@denx.de> wrote:
> Dear Otavio Salvador,
>
>> On Wed, Jan 30, 2013 at 12:12 PM, Marek Vasut <marex@denx.de> wrote:
>> > Dear Otavio Salvador,
>> >
>> >> Adjust HW_DRAM_CTL14 to enable the chip selects to allow usage of full
>> >> 128MB of RAM.
>> >>
>> >> Signed-off-by: Otavio Salvador <otavio@ossystems.com.br>
>> >
>> > Just enable the full set for all in the generic memory register set
>> > (dram_vals)?
>>
>> Per datasheet description it shouldn't be done for LQFP;
>
> LQFP package is missing pinmux for the other pins, so that's ok.
>
>> so the safest
>> setting is to the default we're using as it will work for new boards
>> and the chip select can be adjusted when need.
>
> And since the block inside the CPU is the same, just missing the pinmux, it is
> also safe to enable all CS lines for default operation.

If this is the case why they added the CS selector? The datasheet is
clear about the different setting in BGA and LQFP. I'd prefer if
someone from Freescale could check if it would be safe to enable them
all or not. Fabio? :-)

--
Otavio Salvador O.S. Systems
E-mail: otavio at ossystems.com.br http://www.ossystems.com.br
Mobile: +55 53 9981-7854 http://projetos.ossystems.com.br