Devicetree/Bindings - Revision history

Knuxify at 07:38, 22 February 2025

2025-02-22T07:38:11Z

← Older revision		Revision as of 07:38, 22 February 2025
Line 4:		Line 4:
	Bindings for most Linux components can be found in <code>Documentation/devicetree/bindings</code>; there is also a [https://github.com/devicetree-org/dt-schema core DT schema] defining the most basic components and syntax.		Bindings for most Linux components can be found in <code>Documentation/devicetree/bindings</code>; there is also a [https://github.com/devicetree-org/dt-schema core DT schema] defining the most basic components and syntax.

	==~~= Verifying~~ DT bindings ===		== Validating DT bindings ==

	The Linux kernel has tools for validating devicetree schema bindings. Getting the DT binding check to pass is required for upstreaming the binding.		The Linux kernel has tools for validating devicetree schema bindings. Getting the DT binding check to pass is required for upstreaming the binding.

Knuxify: add devicetree navbox

2025-02-19T19:15:25Z

add devicetree navbox

← Older revision		Revision as of 19:15, 19 February 2025
Line 1:		Line 1:
			{{Navbox devicetree}}
	Devicetrees are validated using '''devicetree schema'''; this schema specifies allowed properties for nodes based on their <code>compatible</code> string. Devicetree schema is defined through '''bindings''', YAML files containing schema information (older bindings use TXT format, but this is deprecated).		Devicetrees are validated using '''devicetree schema'''; this schema specifies allowed properties for nodes based on their <code>compatible</code> string. Devicetree schema is defined through '''bindings''', YAML files containing schema information (older bindings use TXT format, but this is deprecated).

Knuxify: Knuxify moved page User:Knuxify/Draft:Devicetree/Bindings to Devicetree/Bindings: move to main namespace

2025-02-19T18:06:05Z

Knuxify moved page User:Knuxify/Draft:Devicetree/Bindings to Devicetree/Bindings: move to main namespace

← Older revision		Revision as of 18:06, 19 February 2025
(No difference)

Knuxify: /* See also */

2025-02-17T12:23:07Z

Knuxify: split bindings into separate page

2025-02-17T12:22:56Z

split bindings into separate page

New page

Devicetrees are validated using '''devicetree schema'''; this schema specifies allowed properties for nodes based on their <code>compatible</code> string. Devicetree schema is defined through '''bindings''', YAML files containing schema information (older bindings use TXT format, but this is deprecated).

Bindings for most Linux components can be found in <code>Documentation/devicetree/bindings</code>; there is also a [https://github.com/devicetree-org/dt-schema core DT schema] defining the most basic components and syntax.

=== Verifying DT bindings ===

The Linux kernel has tools for validating devicetree schema bindings. Getting the DT binding check to pass is required for upstreaming the binding.

To verify all DT bindings, run:

<syntaxhighlight lang="shell-session">
$ make dt_binding_check
</syntaxhighlight>

You can also verify only a specific binding by providing its filename in the <code>DT_SCHEMA_FILES</code> option. This option takes either a filename or a directory name:

<syntaxhighlight lang="shell-session">
$ make dt_binding_check DT_SCHEMA_FILES=brcm,bcm590xx.yaml # Checks all bindings named brcm,bcm590xx.yaml
$ make dt_binding_check DT_SCHEMA_FILES=qcom # Checks all bindings in any (sub)folder named "qcom"
$ make dt_binding_check DT_SCHEMA_FILES=/gpio/ # Checks all bindings in /gpio folder
</syntaxhighlight>

To verify a DTS file against a DT schema, build the DTB target directly and provide the <code>CHECK_DTBS=y</code> option alongside <code>DT_SCHEMA_FILES</code>:

<syntaxhighlight lang="shell-session">
$ make CHECK_DTBS=y DT_SCHEMA_FILES=trivial-devices.yaml qcom/sm8450-hdk.dtb
</syntaxhighlight>

== See also ==

* From Linux kernel documentation:
** [https://docs.kernel.org/devicetree/bindings/writing-schema.html Writing Devicetree Bindings in json-schema]
** [https://docs.kernel.org/devicetree/bindings/writing-bindings.html DOs and DON’Ts for designing and writing Devicetree bindings]
** [https://docs.kernel.org/devicetree/bindings/submitting-patches.html
Submitting Devicetree (DT) binding patches]

← Older revision		Revision as of 12:23, 17 February 2025
Line 32:		Line 32:
	** [https://docs.kernel.org/devicetree/bindings/writing-schema.html Writing Devicetree Bindings in json-schema]		** [https://docs.kernel.org/devicetree/bindings/writing-schema.html Writing Devicetree Bindings in json-schema]
	** [https://docs.kernel.org/devicetree/bindings/writing-bindings.html DOs and DON’Ts for designing and writing Devicetree bindings]		** [https://docs.kernel.org/devicetree/bindings/writing-bindings.html DOs and DON’Ts for designing and writing Devicetree bindings]
	** [https://docs.kernel.org/devicetree/bindings/submitting-patches.html		** [https://docs.kernel.org/devicetree/bindings/submitting-patches.html Submitting Devicetree (DT) binding patches]
	Submitting Devicetree (DT) binding patches]