[PATCH v2] docs: dt: writing-schema: add example for multiple DT_SCHEMA_FILES

[Hugo Villeneuve]

From: Hugo Villeneuve <hvilleneuve@xxxxxxxxxxxx>

Variable DT_SCHEMA_FILES can specify multiple files or patterns, but the
documentation does not indicate how to do it. Each entry needs to be
separated by a column symbol ':'.

Add an example to make it more obvious how to specify multiple
DT_SCHEMA_FILES.

Signed-off-by: Hugo Villeneuve <hvilleneuve@xxxxxxxxxxxx>
---
Link: [v1] https://lore.kernel.org/all/20230928190259.3497563-1-hugo@xxxxxxxxxxx/

Changes for V2:
- Change description to indicate that multiple patterns can also be specified

 Documentation/devicetree/bindings/writing-schema.rst | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/Documentation/devicetree/bindings/writing-schema.rst b/Documentation/devicetree/bindings/writing-schema.rst
index 4a381d20f2b4..0a6cf19a1459 100644
--- a/Documentation/devicetree/bindings/writing-schema.rst
+++ b/Documentation/devicetree/bindings/writing-schema.rst
@@ -159,11 +159,14 @@ 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
 

base-commit: 8a749fd1a8720d4619c91c8b6e7528c0a355c0aa
-- 
2.39.2