On Mon, 09 Dec 2024 16:18:19 +0100, Herve Codina wrote:
> An export-symbols node allows to export symbols for symbols resolution
> performed when applying a device tree overlay.
>
> When a device tree overlay is applied on a node having an export-symbols
> node, symbols listed in the export-symbols node are used to resolve
> undefined symbols referenced from the overlay.
>
> This allows:
> - Referencing symbols from an device tree overlay without the need to
> know the full base board. Only the connector definition is needed.
>
> - Using the exact same overlay on several connectors available on a given
> board.
>
> For instance, the following description is supported with the
> export-symbols node:
> - Base device tree board A:
> ...
> foo_connector: connector1 {
> export-symbols {
> connector = <&foo_connector>;
> };
> };
>
> bar_connector: connector2 {
> export-symbols {
> connector = <&bar_connector>;
> };
> };
> ...
>
> - Base device tree board B:
> ...
> front_connector: addon-connector {
> export-symbols {
> connector = <&front_connector>;
> };
> };
> ...
>
> - Overlay describing an addon board the can be connected on connectors:
> ...
> node {
> ...
> connector = <&connector>;
> ...
> };
> ...
>
> Thanks to the export-symbols node, the overlay can be applied on
> connector1 or connector2 available on board A but also on
> addon-connector available on board B.
>
> Signed-off-by: Herve Codina <herve.codina@xxxxxxxxxxx>
> ---
> .../devicetree/bindings/export-symbols.yaml | 43 +++++++++++++++++++
> 1 file changed, 43 insertions(+)
> create mode 100644 Documentation/devicetree/bindings/export-symbols.yaml
>
My bot found errors running 'make dt_binding_check' on your patch:
yamllint warnings/errors:
dtschema/dtc warnings/errors:
compress: size (5) error for type phandle
/builds/robherring/dt-review-ci/linux/Documentation/devicetree/bindings/mtd/partitions/fixed-partitions.example.dtb: uimage@100000: compress: b'lzma\x00' is not of type 'object', 'integer', 'array', 'boolean', 'null'
from schema $id: http://devicetree.org/schemas/dt-core.yaml#
doc reference errors (make refcheckdocs):
See https://patchwork.ozlabs.org/project/devicetree-bindings/patch/20241209151830.95723-2-herve.codina@xxxxxxxxxxx
The base for the series is generally the latest rc1. A different dependency
should be noted in *this* patch.
If you already ran 'make dt_binding_check' and didn't see the above
error(s), then make sure 'yamllint' is installed and dt-schema is up to
date:
pip3 install dtschema --upgrade
Please check and re-submit after running the above command yourself. Note
that DT_SCHEMA_FILES can be set to your schema file to speed up checking
your schema. However, it must be unset to test all examples with your schema.
