[U-Boot] U-boot NAND boot on IMX31 3stack(ARM)

[alfred steele]

Hi Magnus,

Thanks!
Do you remember, off the head, what kind of hardware differences
between MX31 and Phycore.  I am kind of trying to identify the
differences between the two in order to be able to map the patch to
the differences.
Was the nand_spl directory created for imx31(PDK) NAND specific
changes. The reason i am asking is because in the
"uboot-imx-imx_v2009.01" tarball Freescale has supplied us with, the
directory already exists. I am yet to try apply your PDK patch to the
same or compare the differences yet.

I am also wondering if there is a include file which builds up a table
of working NAND devices and thier attributes which tells the U-boot on
the parameters about a particular NAND device on the board like
Block_size , page_size, device size, pages per block, device id etc.
Or This information needs to be kind of hardcoded every time.

We have been working on Redboot all this while and what's driving us
to move to U-boot is the available ability to be able to boot Linux
off the SD card on the MX31 platform.

Regards,
Alfred.


On Fri, Mar 27, 2009 at 3:01 PM, Magnus Lilja <lilja.magnus at gmail.com> wrote:
> 2009/3/27 alfred steele <alfred.jaquez at gmail.com>:
>> Thanks Magnus,
>> How difficult or rather much an effort would it need to add NAND boot
>> support and make it work on MX35 or MX31 3stack board.
>> Are there any existing guidelines for accelerating the development or
>> is the generic uboot porting guidelines .
>
>
> For i.MX31 3stack (a.k.a. PDK) there's really not that much porting
> that needs to be done. mx31 is supported in U-boot so the following is
> needed:
> * Update my basic i.MX31 PDK patch to apply on top of the current
> U-boot git (it's been a while since I updated it)
> * Add the NAND SPL patch I mentioned in my previous reply (update it
> with the review comments)
> * Test and submit the patches
>
> The above could be done in a couple of days if your're familiar with
> i.MX31 and U-boot. Add more time if you're a newcomer to U-boot and/or
> i.MX31.
>
> Since Freescale hasn't published much info on i.MX35 or the 3stack for
> that I can only guess that it would probably be pretty straight
> forward to do a NAND SPL for i.MX35 based on the one for i.MX31 (the
> NAND controller and possibly the SDRAM controller on i.MX35 seems to
> be different from i.MX31).
>
>
> Regards, Magnus
>