diff options
Diffstat (limited to 'dts/Bindings/writing-schema.rst')
| -rw-r--r-- | dts/Bindings/writing-schema.rst | 35 |
1 files changed, 30 insertions, 5 deletions
diff --git a/dts/Bindings/writing-schema.rst b/dts/Bindings/writing-schema.rst index 4a381d20f2..7e71cdd1d6 100644 --- a/dts/Bindings/writing-schema.rst +++ b/dts/Bindings/writing-schema.rst @@ -31,7 +31,7 @@ $schema Indicates the meta-schema the schema file adheres to. title - A one-line description on the contents of the binding schema. + A one-line description of the hardware being described in the binding schema. maintainers A DT specific property. Contains a list of email address(es) @@ -39,7 +39,7 @@ maintainers description Optional. A multi-line text block containing any detailed - information about this binding. It should contain things such as what the block + information about this hardware. It should contain things such as what the block or device does, standards the device conforms to, and links to datasheets for more information. @@ -71,9 +71,31 @@ required A list of DT properties from the 'properties' section that must always be present. +additionalProperties / unevaluatedProperties + Keywords controlling how schema will validate properties not matched by this + schema's 'properties' or 'patternProperties'. Each schema is supposed to + have exactly one of these keywords in top-level part, so either + additionalProperties or unevaluatedProperties. Nested nodes, so properties + being objects, are supposed to have one as well. + + * additionalProperties: false + Most common case, where no additional schema is referenced or if this + binding allows subset of properties from other referenced schemas. + + * unevaluatedProperties: false + Used when this binding references other schema whose all properties + should be allowed. + + * additionalProperties: true + Rare case, used for schemas implementing common set of properties. Such + schemas are supposed to be referenced by other schemas, which then use + 'unevaluatedProperties: false'. Typically bus or common-part schemas. + examples - Optional. A list of one or more DTS hunks implementing the - binding. Note: YAML doesn't allow leading tabs, so spaces must be used instead. + Optional. A list of one or more DTS hunks implementing this binding only. + Example should not contain unrelated device nodes, e.g. consumer nodes in a + provider binding, other nodes referenced by phandle. + Note: YAML doesn't allow leading tabs, so spaces must be used instead. Unless noted otherwise, all properties are required. @@ -159,11 +181,14 @@ It is possible to run both in a single command:: make dt_binding_check dtbs_check It is also possible to run checks with a subset of matching schema files by -setting the ``DT_SCHEMA_FILES`` variable to a specific schema file or pattern. +setting the ``DT_SCHEMA_FILES`` variable to 1 or more specific schema files or +patterns (partial match of a fixed string). Each file or pattern should be +separated by ':'. :: make dt_binding_check DT_SCHEMA_FILES=trivial-devices.yaml + make dt_binding_check DT_SCHEMA_FILES=trivial-devices.yaml:rtc.yaml make dt_binding_check DT_SCHEMA_FILES=/gpio/ make dtbs_check DT_SCHEMA_FILES=trivial-devices.yaml |