[Bug 1838064] Re: [FFe] Support Nitrogen6x board

[Łukasz Zemczak]

The livecd-rootfs changes look correct, and since there's no real better
way of verifying this right now - I'm setting this as verification-done.
All autopkgtest regressions have been cleared. This should be good to
go.

** Tags removed: verification-needed verification-needed-bionic
** Tags added: verification-done verification-done-bionic

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Title:
  [FFe] Support Nitrogen6x board

Status in livecd-rootfs package in Ubuntu:
  Fix Released
Status in u-boot package in Ubuntu:
  Fix Released
Status in livecd-rootfs source package in Bionic:
  Fix Committed
Status in u-boot source package in Bionic:
  Confirmed

Bug description:
  [Impact] The existing u-boot package doesn't build the binary u-boot-
  imx for Nitrogen6x 2G version. Also, we need to support the new
  subarch in livecd-rootfs for future image builds.

  [Test Case] Since essentially these changes are related to hardware enablement (and no official images are yet being produced), the only possible test case is asking the HWE team to verify if the packages in -proposed work as expected on the target device.
  For the livecd-rootfs changes - since all the other bits and pieces are still not available (gadget tree for instance), it is not really possible to test this at this point. That being said, addition of a new platform should be safe and the only acceptance criteria would be to make sure the new changes did not regress any existing builds.

  [Regression Potential] None. The patches add config changes for a new target (nitrogen6x2g) to generate u-boot-imx.
  The changes are tested on the Nitrogen6x board.
  As for livecd-rootfs - there is also no possible regression potential. We are only adding new case conditionals for a new platform.

  [Feature Freeze Exception]
  Even though the required u-boot changes for Nitrogen6x support do not introduce any behavior change in existing packages per-se, the changes do enable a new, not-built previously target by default. All the Ubuntu-specific changes do not affect any existing users, since the nitrogen6q2g target was never officially built for both Ubuntu and Debian.
  To reach as many users as possible and become a well-known distribution for IoT and embedded devices, it is important to support as many different devices as possible. Which is why I would like to request a Feature Freeze exception for any hardware-enablement work required for adding Nitrogen6x support.

  Test builds of the u-boot package: https://launchpad.net/~ci-train-
  ppa-service/+archive/ubuntu/3796/+packages

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