Building U-Boot for Compulab's imx8mm-cl-iot-gate board

[Paul Liu]

Hi Fabio,

We have dfu_alt_info set. So that we can capsule update from UEFI.
First, "setenv -e -nv -bs -rt -v OsIndications =0x04"
And then we can "efidebug capsule update -v ${loadaddr}".

To make the capsule binary, we need to create a capsule1.itb with the
following content:
/dts-v1/;

/ {
       description = "Automatic U-Boot environment update";
       #address-cells = <2>;

       images {
               flash-bin {
                       description = "U-Boot binary on SPI Flash";
                       data = /incbin/("flash.bin");
                       compression = "none";
                       type = "firmware";
                       arch = "arm64";
                       load = <0>;
                       hash-1 {
                               algo = "sha1";
                       };
               };
               u-boot-itb {
                       description = "U-Boot binary";
                       data = /incbin/("u-boot.itb");
                       compression = "none";
                       type = "firmware";
                        arch = "arm64";
                       load = <0>;
                       hash-1 {
                               algo = "sha1";
                       };
               };
       };
};

And then "./tools/mkimage -f capsule1.its capsule1.itb"
"./tools/mkeficapsule --fit capsule1.itb --index 1 capsule1.bin"

And we can tftp the capsule1.bin to ${loadaddr} and then use the capsule
update.

Yours,
Paul


On Fri, 2 Jul 2021 at 00:39, Fabio Estevam <festevam at gmail.com> wrote:

> Hi Paul,
>
> On Thu, Jul 1, 2021 at 12:45 PM Paul Liu <paul.liu at linaro.org> wrote:
>
> > Hi Fabio,
> >
> > Yes. It is able to not provide the fip,bin.
> > If you use bl31.bin as bl31.bin then fip.bin can be empty.
> > If you use bl2.bin as bl31.bin then you have to have the fip.
> >
> > This depends on how TF-A are being built.
> > If you build TF-A without NEED_BL2=yes. Then you don't need the fip.bin.
> > If you build TF-A with NEED_BL2=yes. Then FIP is needed. And you have to
> use bl2.bin generated by TF-A and rename it to bl31.bin. I think maybe I
> can fix the README. If you can do that then that's perfect because my
> English is always not very good. So that means I sometimes need more review
> on my English sentences.
>
> Thanks for the clarification.
>
> I can work on creating a README file for this board after I manage to boot
> it.
>
> What is the process of flashing the flash.bin and u-boot.itb binaries
> to the eMMC?
>
> Do you use the uuu tool? If so, what is the  uuu_script script that you
> use?
>
> Thanks,
>
> Fabio Estevam
>