[U-Boot] Adding support for red pitaya zynq board; is zynq working?

[Jeremy Herbert]

Hi Michal,

Yes, it's a shame that the software is lagging so far behind, as it is an
interesting board for DSP experiments.

I will work on this next week. Could you please tell me what you mean by
"revup"? Do you mean I should use vivado to generate an updated DTS for the
board?

Thanks,
Jeremy

On Fri, 27 Mar 2015 at 18:15 Michal Simek <monstr at monstr.eu> wrote:

> Hi Jeremy,
>
> First of all please send the patch via git send-email command.
>
> On 03/26/2015 10:08 AM, Jeremy Herbert wrote:
> > Hi all,
> >
> > I just tried to build the latest master mainline u-boot for a xilinx zynq
> > 7010 board called the red pitaya. I'm not affiliated at all with the
> board,
> > just trying to use it with a recent version of u-boot (and linux).
> > Unfortunately it gets stuck in a reset loop (I wasn't able to nail down
> > why, but it was definitely something in u-boot). However, I was able to
> > successfully build u-boot using the xilinx fork here:
> > https://github.com/Xilinx/u-boot-xlnx and have it work fine.
>
> Interesting board - have to get a sample to be able to play with.
>
> > I've attached the patch I made to add minimal support for the red pitaya
> > (SD boot only, no ethernet as it uses an unsupported lantiq chipset). It
> is
> > the policy of the xilinx u-boot fork that board support should be pushed
> > straight upstream, but I'm not sure if this is the right place seeing as
> > the upstream version doesn't currently work. Could someone please give me
> > some advice on what to do with this patch?
>
> The reason why upstream version is not working for you is that you are
> probably running version without DTB that's why it is not initialized
> properly. It means you should load u-boot-dtb.bin instead.
>
> XMD script for example
> connect arm hw -debugdevice cpunr 1
> dow -data u-boot-dtb.bin 0x4000000
> rwr pc 0x4000000
> con
> exit
>
> Then everything should just run correctly.
>
> I have briefly looked at the code and the whole red pitaya code needs
> to be updated because it is pretty ancient old.
>
> For pushing this to mainline you should revup DTB which targets 14.6
> version
> which is pretty old too. That's why update to the latest&greatest needs
> to be done.
>
> Thanks,
> Michal
>
> --
> Michal Simek, Ing. (M.Eng), OpenPGP -> KeyID: FE3D1F91
> w: www.monstr.eu p: +42-0-721842854
> Maintainer of Linux kernel - Microblaze cpu - http://www.monstr.eu/fdt/
> Maintainer of Linux kernel - Xilinx Zynq ARM architecture
> Microblaze U-BOOT custodian and responsible for u-boot arm zynq platform
>
>
>