[Bug 1578505] Re: Raspberry Pi 3 support

[Timo Jyrinki]

Thank you for the patch! I'll test its buildability and sponsor it.

At some point it would be nice to evaluate the big accumulated delta in
Ubuntu's flash-kernel and rebase on Debian's
https://tracker.debian.org/pkg/flash-kernel

** Changed in: flash-kernel (Ubuntu)
     Assignee: (unassigned) => Timo Jyrinki (timo-jyrinki)

** Changed in: flash-kernel (Ubuntu)
       Status: Triaged => In Progress

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https://bugs.launchpad.net/bugs/1578505

Title:
  Raspberry Pi 3 support

Status in flash-kernel package in Ubuntu:
  In Progress

Bug description:
  Note that this makes a few assumptions:

  1) Will not work as-is (but is safe to apply); updated u-boot (Debian:
  #823524) and linux-firmware-raspi2 (LP: #1578745) will also be
  required to take advantage of booting on the RPi3.  Details at
  https://wiki.ubuntu.com/ARM/RaspberryPi/RaspberryPi3

  2) For some reason, u-boot mkenvimage creates a uboot.env using the
  RPi2 config which u-boot HEAD just doesn't read, citing a CRC error.
  This occurs even when using mkenvimage from HEAD.  I'm still trying to
  determine if it's a bug with u-boot, but boot.scr works fine.  I've
  translated the uboot.env to its equivalent boot.scr script and it
  works fine, so I don't see why we can't just use boot.scr on the RPi3.
  (saveenv within the u-boot shell writes a uboot.env which it can
  subsequently re-read, interestingly.)

  3) The all.db entry, minus the move to boot.scr, is based on the RPi2
  entry above, right down to the "XXX".

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