linux-kernel - [PATCH] docs: dt: writing-schema: Describe validating one DTB

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Message-ID: <20250123145009.546923-1-krzysztof.kozlowski@linaro.org>
Date: Thu, 23 Jan 2025 15:50:09 +0100
From: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To: Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org
Cc: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
Subject: [PATCH] docs: dt: writing-schema: Describe validating one DTB

Running DT schema validation with `dtbs_check` is time consuming thus we
also have ability to check only one DTB target like:

  make -j8 DT_SCHEMA_FILES=gpio CHECK_DTBS=y qcom/sm8450-hdk.dtb

Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
---
 Documentation/devicetree/bindings/writing-schema.rst | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/Documentation/devicetree/bindings/writing-schema.rst b/Documentation/devicetree/bindings/writing-schema.rst
index eb8ced400c7e..6dea741c5962 100644
--- a/Documentation/devicetree/bindings/writing-schema.rst
+++ b/Documentation/devicetree/bindings/writing-schema.rst
@@ -222,6 +222,10 @@ separated by ':'.
     make dt_binding_check DT_SCHEMA_FILES=/gpio/
     make dtbs_check DT_SCHEMA_FILES=trivial-devices.yaml
 
+Validation of one DT source by providing Makefile target::
+
+    make CHECK_DTBS=y target.dtb
+    make DT_SCHEMA_FILES=xxx.yaml CHECK_DTBS=y target.dtb
 
 json-schema Resources
 ---------------------
-- 
2.43.0