[U-Boot] [PATCH v2 7/7] am335x_evm: Add support to boot from NOR.

[Tom Rini <trini@ti.com>]

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On 07/17/2013 08:58 AM, Mark Jackson wrote:
> On 11/07/13 14:06, Mark Jackson wrote:
>> On 18/06/13 13:11, Mark Jackson wrote:
>>> On 17/06/13 15:43, Mark Jackson wrote:
>>>> On 13/05/13 19:28, Tom Rini wrote:
>>>>> From: Steve Kipisz <s-kipisz2@ti.com>
>>>>> 
>>>>> NOR requires that s_init be within the first 4KiB of the 
>>>>> image so that we can perform the rest of the required 
>>>>> pinmuxing to talk with the rest of NOR that we are found 
>>>>> on.  When NOR_BOOT is set we save our environment in NOR at
>>>>> 512KiB and a redundant copy at 768KiB.  We avoid using SPL
>>>>> for this case and u-boot.bin is written directly to the
>>>>> start of NOR.
>>>> 
>>>> I'm trying to get this up and running our NanoBone platform,
>>>>  but I'm having no success.
>>> 
>>> Just an update ... I now have it working ... yay !!
>>> 
>>> The main (and possibly the *only*) culprit was that SYSBOOT[8]
>>>  (which selects 8/16bit mode) was being incorrectly influenced
>>>  by a hardware fault.
>>> 
>>> I have pulled quite a few patches from various places, some of
>>>  which might not be required.  Now I have a working base, I'll
>>>  work out what is needed on top of Tom's original patch set.
>> 
>> Okay ... I've now got NOR booting rebased to master using the 
>> patch set below. This doesn't include my board code as that's of
>>  no interest until NOR booting is added to the mainline code.
>> 
>> Sorry, Tom, I'm no git expert, so I'm not sure how to compare 
>> this to your previous patches ... I hope this is useful in some 
>> way ??
> 
> Tom ... any idea when NOR booting will be merged into the mainline
>  code ?

I've been working this week on things, and I'm hopeful about
re-posting the series today.  The only minor issue I have is that
calling save_omap_boot_params and the asm() bits for finishing NOR
pinmux seem to conflict and leave me in a bad state.  But, since we
don't make use of the boot_params info yet in full U-Boot, that's not
a blocker to me.

- -- 
Tom
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