[PATCH 0/4] Enable EFI Capsule on Disk on Libre Computer LePotato & LaFrite

[Anand Moon]

Hi  Ferass,

On Thu, 9 Apr 2026 at 02:00, Ferass El Hafidi via groups.io
<funderscore=postmarketos.org at groups.io> wrote:
>
> Mostly everything is already in place to enable EFI capsules and in particular
> EFI capsule on disk.
>
> First, switch all Amlogic boards to use SYSRESET. EFI Capsule on Disk
> functionality expects sysreset to be present. As the current reset_cpu()
> function in board-common.c is basically only doing PSCI reset on U-Boot
> proper, we can replace it with sysreset's PSCI support, which works just
> fine for that purpose provided BL31 is running (SPL stays on an
> SoC-specific reset_cpu() which does for(;;);, as the overhead for
> sysreset is too high and we don't have PSCI yet at that point).
>
> Then we can enable capsule on disk. LaFrite has Capsule updates enabled
> already, so it is simply a matter of enabling CoD. LePotato does not
> have Capsule updates enabled by default, however it can be easily enabled
> and setup to update u-boot on eMMC/SD.
>
> With Capsule on Disk setup, it becomes possible to update U-Boot directly
> from Linux, without having to worry about manually using `flashprog`
> (for SPI flash) or `dd` (for eMMC/SD). Instead, thanks to CoD, updates
> can be handled by `fwupd` and applied upon next EFI boot.
>
> To test:
>
>  * build U-Boot as usual
>
>  * in that running U-Boot, run: `efidebug capsule esrt` to get the GUID
>    -OR-
>    run the following in your tree:
>         tools/mkeficapsule guidgen path_to_devicetree_here U_BOOT_MESON_MMC
>                                            (or U_BOOT_MESON_SPI on LaFrite)
>
>  * proceed with the following guide to create a capsule file:
>    https://docs.u-boot.org/en/latest/develop/uefi/uefi.html#enabling-uefi-capsule-update-feature
>
>  * generate a .cab file suitable for fwupd using `mkcab`:
>    https://gitlab.postmarketos.org/tauchgang/tauchgang-ci/-/tree/main/mkcab
>         mkcab u-boot-libretech-cc.capsule GUID-GOES-HERE libretech-cc "LePotato" 2026.04
>    (as of writing, the README.md suggests this is for Qualcomm only. It
>     actually does nothing that is Qualcomm-specific, and works on any
>     board that supports Capsule on Disk and fwupd)
>
>  * on the board itself, boot to Linux via EFI, install fwupd, copy the resulting
>    .cab file, and run as root:
>         fwupdtool --force install u-boot-libretech-cc.cab
>
>  * reboot, make sure you boot over EFI, else the capsule update will not
>    start
>
> Signed-off-by: Ferass El Hafidi <funderscore at postmarketos.org>
Thanks for your work.

I haven't tested the EFI portion yet, but I have a few questions regarding
the previous commit 17d80a3b326e ("arm: meson: spl: add support for
SPL DRAM init").
Could you please clarify how you generated the Meson DRAM timing parameters?

I’m curious about the boot flow since we can apparently boot U-Boot without
the Amlogic-signed BL1 firmware.

I just wanted to understand how to upstream U-Boot for the Meson8b (Odroid C1+)
platform, as it’s currently stuck on a very old version (v2011). It's
ARM 32-bit.

Thanks
-Anand


> ---
> Ferass El Hafidi (4):
>       arm: mach-meson: move reset_cpu to spl only
>       arm: meson: enable SYSRESET_PSCI
>       configs: libretech-ac_defconfig: enable EFI Capsule on Disk
>       configs: libretech-cc_defconfig: enable EFI Capsule on Disk
>
>  arch/arm/mach-meson/Kconfig        |  2 ++
>  arch/arm/mach-meson/board-common.c | 14 --------------
>  arch/arm/mach-meson/spl.c          | 10 ++++++++++
>  configs/libretech-ac_defconfig     |  1 +
>  configs/libretech-cc_defconfig     |  4 ++++
>  5 files changed, 17 insertions(+), 14 deletions(-)
> ---
> base-commit: 4dc4080805fac1b1ed7606ce3bc8fb44a6d59d5e
> change-id: 20260408-b4-amlogic-sysreset-capsules-8f5962defafb
>
> Best regards,
> --
> Ferass El Hafidi <funderscore at postmarketos.org>
>
>
>
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