[Buildroot] RPi

[Yann E. MORIN <yann.morin.1998@free.fr>]

Pierre, All,

(He! The same usual suspects! ;-) )

On 2014-05-21 14:05 +0200, Pierre Ficheux spake thusly:
> I did some work on BR around Raspberry Pi platform:
> 
> - adding a post-image script for RP SD-card image generation (adapted
> from Yocto RPi recipe)
> - adding BR support for Adafruit touchscreen ->
> https://www.adafruit.com/products/1601
> 
> I don't know if it could help, but I can build patches.

For the RPi script, I have to admit I'm a bit sceptic. We usually
document, as much as we can, the preparation of media for the boards
(you can see the one for the RPi in boards/raspberrypi/readme) but we
usually do not provide such scripts.

The only board we're currently doing it for, is the cubieboard, and it
IMHO has quite a few shortcomings:
  - requires being root
  - uses host-tools without enabling them in the defconfig
  - makes some heavy assumptions on the layout (generated files and
    medium)
  - does not handle all failure modes
  - is (a bit) convoluted

Also, I'm a bit warry at providing such a root-requiring script, as it
is so easy to bork things on an unsuspecting user's machine. I for one
would not run such a script to begin with.

I highly prefer we provide a good documentation on how to generate basic
media for a board, and redirect the user to the upstream documentation
(if it exists.)

We've tried to have a generic infrastructure that would generate images
for any board, without any hard-coded layout or the likes), but it turns
to not be so easy. Such an infra would have to cover all comon cases,
but also weird corner-cases, where the layout is not simply a collection
of partitions laid out on some media (think initramfs with part of the
VFS mounted from a block device, it's not easy.)

Others may disagree on the above, so please provide your script, so we
can see and decide on actual code. ;-)

As for the touchscreen support, that would be very interesting, indeed!
Please send your patch! :-)

Regards,
Yann E. MORIN.

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