[U-Boot] Help Required [imx35pdk]

[Muhammad Usman]

Dear Stefano,
You really explained well. I have got it now. For now I have left the NAND
flash and instead I'm now using NOR. I have successfully boot Linux with
the latest kernel 3.5.3 from NOR.

Thanks a lot for all your support.

On Thu, Sep 13, 2012 at 2:44 AM, stefano babic <sbabic at denx.de> wrote:

> Am 12/09/2012 23:07, schrieb Marek Vasut:
> > Dear Muhammad Usman,
> >
>
> Hi Muhammad,
>
> > Ccing Stefano.
> >
> >> I am adding support of imx35pdk in yocto.
> >> I have done with my bsp. But the u-boot that build in response of my bsp
> >> only runs over NOR and not on NAND. I spend 2 days on it but failed to
> do
> >> so.
>
> U-Boot for mx35pdk runs from NOR and not from NAND. There is no support
> to run from NAND. Even if I can "convince" the board to boot from NAND,
> this was not pushed to mainline. I explain why.
>
> You have found nand_spl with support for mx31pdk. This was the method we
> have previously to boot from NAND. We have now a generic framework for
> SPL, and all new boards (or added support for booting from NAND) must
> use it. A board using the old nand_spl will not be merged into mainline.
>
> The mx35pdk was not ported to this generic SPL. We are really merging
> this framework now to make it available for all SOC, because it was
> common only for TI processor.
>
> > I read some where that mx35pdk required some external 4-pins bla bla
> >> something like that.
>
> It does not require external pins. You have to configure the dip
> switches on the mx35pdk.
>
> >>
> >> Also the u-boot running on NOR is not configuring uImage. I am using
> tftp
> >> but when it comes on loading, it keeps on showing "T T T T T..."
> (time-out
> >> response).
>
> I think I have tested it recently, and it worked - which of the two
> interfaces have you used in u-boot ? Both (FEC and SMC) are supported in
> the mx35pdk u-boot, and both should work, as far as I know.
>
>
> >> One thing more, in the above mentioned repository, there is a directory
> >> like spl_nand in which they have already add mx31pdk for u-boot-nand.bin
> >> support but not mx35pdk. What should i do to overcome all this ???
>
> This is what I talked about before. All boards using spl_nand were added
> a lot of time ago. spl_nand requires a separate driver for SPL, and this
> is highly inefficient. The way we decided to go is to use a generic SPL,
> valid for all SOC. And there is not yet a port for mx35pdk to boot
> directly from NAND.
>
> Best regards,
> Stefano Babic
>
>
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