Instead of
properties:
compatible:
constraint: "foo"
, just have
compatible: "foo"
at the top level of the binding.
For backwards compatibility, the old 'properties: compatible: ...' form
is still accepted for now, and is treated the same as a single-element
'compatible:'.
The old syntax was inspired by dt-schema (though it isn't
dt-schema-compatible), which is in turn a thin wrapper around
json-schema (the idea is to transform .dts files into YAML and then
verify them).
Maybe the idea was to gradually switch the syntax over to dt-schema and
then be able to use unmodified dt-schema bindings, but dt-schema is
really a different kind of tool (a completely standalone linter), and
works very differently from our stuff (see schemas/dt-core.yaml in the
dt-schema repo to get an idea of just how differently).
Better to keep it simple.
This commit also piggybacks some clarifications to the binding template
re. '#cells:'.
Signed-off-by: Ulf Magnusson <Ulf.Magnusson@nordicsemi.no>
Add a new DTS/binding parser to scripts/dts/ for generating
generated_dts_board.conf and generated_dts_board_unfixed.h.
The old code is kept to generate some deprecated defines, using the
--deprecated-only flag. It will be removed later.
The new parser is implemented in three files in scripts/dts/:
dtlib.py:
A low-level .dts parsing library. This is similar to devicetree.py in
the old code, but is a general robust DTS parser that doesn't rely on
preprocessing.
edtlib.py (e for extended):
A library built on top of dtlib.py that brings together data from DTS
files and bindings and creates Device instances with all the data for
a device.
gen_defines.py:
A script that uses edtlib.py to generate generated_dts_board.conf and
generated_dts_board_unfixed.h. Corresponds to extract_dts_includes.py
and the files in extract/ in the old code.
testdtlib.py:
Test suite for dtlib.py. Can be run directly as a script.
testedtlib.py (uses test.dts and test-bindings/):
Test suite for edtlib.py. Can be run directly as a script.
The test suites will be run automatically in CI.
The new code turns some things that were warnings (or not checked) in
the old code into errors, like missing properties that are specified
with 'category: required' in the binding for the node.
The code includes lots of documentation and tries to give helpful error
messages instead of Python errors.
Co-authored-by: Kumar Gala <kumar.gala@linaro.org>
Signed-off-by: Ulf Magnusson <Ulf.Magnusson@nordicsemi.no>
Ulf Magnusson