[Bug 1578505] [NEW] Raspberry Pi 3 support

[Ryan Finnie]

Public bug reported:

Debdiff to follow.

Note that this makes a few assumptions:

1) Will not work as-is; updated u-boot and linux-firmware-raspi2 will
also be required.  I'm testing with u-boot HEAD and raspberrypi/firmware
HEAD.  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 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".

** Affects: flash-kernel (Ubuntu)
     Importance: Undecided
         Status: New

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

Title:
  Raspberry Pi 3 support

Status in flash-kernel package in Ubuntu:
  New

Bug description:
  Debdiff to follow.

  Note that this makes a few assumptions:

  1) Will not work as-is; updated u-boot and linux-firmware-raspi2 will
  also be required.  I'm testing with u-boot HEAD and
  raspberrypi/firmware HEAD.  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 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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