[meta-arago][scarthgap][PATCH RFC 0/4] Add support for SWUpdate

[Anshul Dalal <anshuld@ti.com>]

Hi all,

This RFC adds support for SWUpdate[1] to meta-arago, this provides us with OTA
updates with A/B redundancy for the rootfs.

For now the support is enabled for eMMC boot only based on the 'ti-swupdate'
override. The below steps can be used to test this RFC on an AM62x EVM:

 1. Add 'meta-swupdate' layer[2] to the SDK sources directory.

 2. Since the bootloader side changes have not been merged to ti-u-boot yet,
    make use of the 'swupdate' branch from my own U-Boot fork[3].

 3. Enable 'swupdate' support by setting the 'ti-swupdate' override in
    local.conf as follows:

      DISTROOVERRIDES:append = ":ti-swupdate"

 4. Flash the U-Boot binaries to the correct offsets on boot0 partition as
    per the docs[4] and run 'env save' on first boot to save the environment to
    eMMC's hw partition.

Regards,
Anshul

[1]: https://swupdate.org/
[2]: https://github.com/sbabic/meta-swupdate
[3]: https://github.com/ArchUsr64/u-boot/tree/swupdate
[4]: https://software-dl.ti.com/processor-sdk-linux-rt/esd/AM62X/latest/exports/docs/linux/How_to_Guides/Target/How_to_emmc_boot.html#how-to-emmc-boot

Anshul Dalal (4):
  swupdate: add systemd service to rootfs
  swupdate: add creation of update image
  swupdate: add bootloader support
  swupdate: enable authentication for update image

 meta-arago-distro/conf/distro/arago.conf      |  3 ++
 .../images/files/sw-description               | 46 +++++++++++++++++++
 .../recipes-swupdate/images/update-image.bb   | 27 +++++++++++
 .../libubootenv/files/fw_env.config           |  5 ++
 .../libubootenv/libubootenv_%.bbappend        | 10 ++++
 .../recipes-swupdate/swupdate/files/defconfig | 12 +++++
 .../swupdate/files/swupdate.cfg               | 13 ++++++
 .../swupdate/files/swupdate.sh                | 15 ++++++
 .../swupdate/swupdate_%.bbappend              | 35 ++++++++++++++
 .../wic/sdimage-2part-swupdate.wks            |  6 +++
 10 files changed, 172 insertions(+)
 create mode 100644 meta-arago-distro/recipes-swupdate/images/files/sw-description
 create mode 100644 meta-arago-distro/recipes-swupdate/images/update-image.bb
 create mode 100644 meta-arago-distro/recipes-swupdate/libubootenv/files/fw_env.config
 create mode 100644 meta-arago-distro/recipes-swupdate/libubootenv/libubootenv_%.bbappend
 create mode 100644 meta-arago-distro/recipes-swupdate/swupdate/files/defconfig
 create mode 100644 meta-arago-distro/recipes-swupdate/swupdate/files/swupdate.cfg
 create mode 100644 meta-arago-distro/recipes-swupdate/swupdate/files/swupdate.sh
 create mode 100644 meta-arago-distro/recipes-swupdate/swupdate/swupdate_%.bbappend
 create mode 100644 meta-arago-distro/wic/sdimage-2part-swupdate.wks

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