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

[Marek Vasut]

Dear Fabio Estevam,

> 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>

On M28EVK:

Tested-by: Marek Vasut <marex at denx.de>

Best regards,
Marek Vasut