[U-Boot] AM335x : failure to boot SPL from NAND

[Mark Jackson]

On 18/02/13 14:54, Tom Rini wrote:
> On Mon, Feb 18, 2013 at 02:43:47PM +0000, Mark Jackson wrote:
>> On 15/02/13 21:13, Tom Rini wrote:
>>> On Thu, Feb 14, 2013 at 03:54:23PM +0000, Mark Jackson wrote:
>>>
>>>> I'm trying to diagnose why our AM335x based CPU board (based on the
>>>> AM335x Starter Kit) can boot SPL and U-Boot from an MMC card, but is
>>>> unable to boot from NAND (connected to CS0).

Just a quick update (in case anyone else is in the same boat) ...

Looks like the upper data bus (AD[15:8]) needs to have pullups on it, even though
you're booting from an 8bit device.

I guess the AM335x internal boot code assumes everything is 16bit (even though
SYSBOOT[8] is used to configure 8/16bit device).

Mark J.