[U-Boot] [PATCH v2] mxs: spl_mem_init: Align DDR2 init with FSL bootlets source

[Otavio Salvador]

On Wed, Mar 6, 2013 at 11:31 AM, Marek Vasut <marex at denx.de> wrote:
> Dear Otavio Salvador,
>
>> On Thu, Feb 28, 2013 at 7:59 PM, Fabio Estevam <festevam at gmail.com> wrote:
>> > From: Fabio Estevam <fabio.estevam at freescale.com>
>> >
>> > Currently the following kernel hang happens when loading a 2.6.35 kernel
>> > from Freeescale on a mx28evk board:
>> >
>> > RPC: Registered tcp transport module.
>> > RPC: Registered tcp NFSv4.1 backchannel transport module.
>> > Bus freq driver module loaded
>> > IMX usb wakeup probe
>> > usb h1 wakeup device is registered
>> > mxs_cpu_init: cpufreq init finished
>> > ...
>> >
>> > Loading the same kernel using the bootlets from the
>> > imx-bootlets-src-10.12.01 package, the hang does not occur.
>> >
>> > Comparing the DDR2 initialization from the bootlets code against the
>> > U-boot one, we can notice some mismatches, and after applying the same
>> > initialization into U-boot the 2.6.35 kernel can boot normally.
>> >
>> > Also tested with 'mtest' command, which runs succesfully.
>> >
>> > Signed-off-by: Fabio Estevam <fabio.estevam at freescale.com>
>>
>> Acked-by: Otavio Salvador <otavio at ossystems.com.br>
>
> Otavio, did you review the changes done in this patch ?

This is the setup used in FSL U-Boot and it fixes 2.6.35.3 cpufreq
kernel hang; it is good enough for me to accept it. If you care
enough, go ahead and check every change bit.

-- 
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