[U-Boot] [PATCH 0/5] uboot overlays and FIT image

Tom Rini
2017-07-28T19:20:05Z

On Fri, Jul 28, 2017 at 12:48:22PM -0600, Simon Glass wrote:
> Hi Pantelis,
>
> On 30 June 2017 at 10:22, Pantelis Antoniou
> <pantelis.antoniou@konsulko.com> wrote:
> > This patch allows uboot to handle overlays in a manner that uses
> > a base DT blob and an arbitrary number of DT overlays blobs.
> >
> > It is intended to be used with FIT images since handling a multitude
> > of device tree blobs manually is a chore.
> >
> > The first 3 patches have already been submitted to DTC for review, and
> > provide the plumbing in libfdt.
> >
> > The next patch adds a unit test for a stacked overlay (in which an
> > overlay refers to a symbol contained in a previously applied overlay).
> >
> > The last patch contains the FIT FDT blob generation logic as well
> > as documentation about how it all works.
> >
> > The patchset is available at
> >
> > https://github.com/pantoniou/u-boot/tree/uboot-overlays
> >
> > and is against mainline u-boot as pulled today, 30/6/2017.
> >
> > Pantelis Antoniou (5):
> > libfdt.h: Introduce FDT_PATH_MAX
> > libfdt_env.h: Add <malloc.h> in libfdt environment
> > fdt: Allow stacked overlays phandle references
> > test: overlay: Add unit test for stacked overlay
> > fit: Introduce methods for applying overlays on fit-load
> >
> > common/image-fdt.c | 7 +-
> > common/image-fit.c | 215 ++++++++++++++++++++++++--
> > doc/uImage.FIT/command_syntax_extensions.txt | 12 +-
> > doc/uImage.FIT/overlay-fdt-boot.txt | 221 +++++++++++++++++++++++++++
> > doc/uImage.FIT/source_file_format.txt | 6 +-
> > include/image.h | 10 ++
> > include/libfdt_env.h | 1 +
> > lib/libfdt/fdt_overlay.c | 148 +++++++++++++++++-
> > lib/libfdt/libfdt.h | 3 +
> > test/overlay/Makefile | 1 +
> > test/overlay/cmd_ut_overlay.c | 34 ++++-
> > test/overlay/test-fdt-overlay-stacked.dts | 21 +++
> > 12 files changed, 659 insertions(+), 20 deletions(-)
> > create mode 100644 doc/uImage.FIT/overlay-fdt-boot.txt
> > create mode 100644 test/overlay/test-fdt-overlay-stacked.dts
>
> Will there be a v2 of this series? I'm not sure whether the plan is to
> apply it in the current merge window or not?

There's a certain level of churn and then what will be accepted in
upstream libfdt that's happening before another iteration of this
happens, unfortunately.

--
Tom
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