[U-Boot] u-boot.dtb is not generated when enabling verified boot

[Davis Roman]

Hi Fabio,

I really appreciate your response.

I've decided to try to move over to u-boot 2017.07.

I saw a bootlin talk(https://bit.ly/2HxxxfK) where they seem to indicate
that they had experienced issues with verified boot prior to this version,

So I guess I'll just bite the bullet and hope for the best.

Thank you for your time.

Davis


On Wed, Apr 25, 2018 at 11:53 AM, Fabio Estevam <festevam at gmail.com> wrote:

> Hi Davis,
>
> On Tue, Apr 24, 2018 at 10:19 PM, Davis Roman <davis.roman84 at gmail.com>
> wrote:
> > Hi Fabio,
> >
> > Thank you so much for responding. It's good to know that I'm not alone in
> > the world. :)
> >
> > Unfortunately, I'm stuck with 2016.03 for the moment.
>
> Ops, not good.
>
> > So I'm still having issues with getting verified boot to work. After
> > compiling and installing the new u-boot image on my board I noticed that
> it
> > bricked my board.
> >
> > After lots of trail and error, I tracked it down to CONFIG_OF_CONTROL.
> When
> > enabled, u-boot refuses to boot. ( no output is shown on the serial debug
> > interface)
> >
> > Since I'm using CONFIG_OF_SEPERATE, I suspect u-boot tries to read my
> > attached dtb blob however it's probably wrong.
> >
> > So my dts file looks like this:
> >
> > /dts-v1/;
> >
> > / {
> > model = "dummy";
> > compatible = "dummy";
> >
> > reset at 0 {
> > compatible = "dummy";
> > };
> > };
>
> I suppose you are able to boot your board with u-boot.imx and now you
> are trying to convert it to device tree.
>
> I have never used verified boot and I don't know if verified boot
> requires device tree. I would think it is not a requirement, but will
> let others comment.
>
> If you really need to use device tree, then you need to use a real
> device tree file that describes your hardware.
>
> > Secondly, I'm doing:
> >
> > $ cat u-boot.imx my-blob.dtb > u-boot.imx.final
>
> Maybe you can take a look at this nice tutorial from Jagan:
> https://openedev.amarulasolutions.com/display/
> ODUBOOT/Boot+Linux+on+Engicam+i.MX6
>