From mboxrd@z Thu Jan  1 00:00:00 1970
From: Marek Vasut <marek.vasut@gmail.com>
Date: Tue, 31 Jan 2012 13:45:02 +0100
Subject: [U-Boot] [PATCH] i.MX28: Fix VDDIO and VDDA setup
In-Reply-To: <CAOMZO5B98nSdeq6a5gZP4Risf6S8SEQpdtyE5DyTj862DNe6zQ@mail.gmail.com>
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	<CAOMZO5B98nSdeq6a5gZP4Risf6S8SEQpdtyE5DyTj862DNe6zQ@mail.gmail.com>
Message-ID: <201201311345.02661.marek.vasut@gmail.com>
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> On 1/30/12, Marek Vasut <marek.vasut@gmail.com> wrote:
> > Note: Guys, please give this a testrun. I think it might fix the issue
> > Robert
> > was observing. I dug into the imx-bootlets and the bootrom X-Files and
> > found this paranormal piece of code. Adding it fixes the boot issue on
> > my crappy board.
> 
> Tried your patch and my mx28evk still hangs after a "reboot" command.
> It reads the scratch registers as 0, report the total RAM size as 0
> and then U-boot hangs.

Right, because RAM size is 0. I see, so DRAM init fails somewhere. I think 
though it doesn't hang in the POWER init code anymore. Can you trace mem_init() 
in the SPL? Simply define CONFIG_SPL_SERIAL_SUPPORT for example and run 
serial_init() before, then run serial_puts() every now and then when fit.

M

> 
> Regards,
> 
> Fabio Estevam