Unify the 64MiB flash layout

[Joel Stanley]

On Thu, 27 May 2021 at 07:14, Lei Yu <yulei.sh at bytedance.com> wrote:
>
> This email is to share some information about the OpenBMC 64MiB flash layout.
>
> In current Linux kernel, there is openbmc-flash-layout-64.dtsi that is
> being used on meta-bytedance/meta-g220a system, there is on-going
> change[1] for aspeed-bmc-ampere-mtjade.dts to use the layout as well.
>
> However, according to ast2600's change[2], the layout does not fit
> ast2600's u-boot, so it updates the layout by changing the existing
> one.
>
> On g220a system, we have tested the new layout and verifies that it
> works fine, with below changes
> 1. Pick the ast2600's change[2] in kernel;
> 2. Pick the `image_types_phosphor.bbclass` change[3];
> 3. Update the u-boot env to boot from the new location, or use the new
> u-boot-aspeed-sdk_2019.04.bb[4]
>    On g220a, we use the new u-boot.
>
> With the above changes, g220a system works fine with the new u-boot
> and the updated flash layout.
>
> To make it consistent for both ast2500 and ast2600, it's better to use
> the same flash layout (and u-boot).
> So I would suggest merge the changes of [1] and [3], for now g220a and
> meta-ampere/meta-jade could be impacted.

Thanks for the summary Lei. I will merge [2] for v5.14 and backport it
to dev-5.10.

Cheers,

Joel

>
> [1]: https://lore.kernel.org/openbmc/20210517040036.13667-4-quan@os.amperecomputing.com/
> [2]: https://lore.kernel.org/linux-arm-kernel/20210316085932.2601-1-troy_lee@aspeedtech.com/
> [3]: https://gerrit.openbmc-project.xyz/c/openbmc/meta-phosphor/+/39343
> [4]: https://github.com/openbmc/openbmc/blob/master/meta-aspeed/recipes-bsp/u-boot/u-boot-aspeed-sdk_2019.04.bb
>
> --
> BRs,
> Lei YU