chapter2: reference dt-schema in a note

Mention in a footnote the dt-schema tools and schemas, which can be used
for automated DTB verification. Add a reference to dt-schema v2024.02.

Signed-off-by: Vincent Stehlé <[email protected]>

source/chapter2-uefi.rst

@@ -339,7 +339,7 @@ in Flattened Devicetree Blob (DTB) format version 17 or higher as described in
 [DTSPEC]_ § 5.
 The DTB Nodes and Properties must be compliant with the requirements listed in
 [DTSPEC]_ § 3 & 4 and with the requirements listed in the following table, which
-take precedence.
+take precedence. [#DTSchNote]_
 
 .. list-table:: DTB Nodes and Properties requirements
    :widths: 50 50
@@ -359,6 +359,9 @@ take precedence.
 The DTB must be contained in memory of type `EfiACPIReclaimMemory`.
 [#ACPIMemNote]_
 
+.. [#DTSchNote] The validity of the DTB and its conformance to [DTSPEC]_ can be
+   verified automatically with the tools and schemas in [DTSCHEMA]_.
+
 .. [#ACPIMemNote] `EfiACPIReclaimMemory` was chosen to match the recommendation
    for ACPI tables which fulfill the same task as the DTB.
 

source/references.rst

@@ -17,6 +17,10 @@ Bibliography
    <https://uefi.org/sites/default/files/resources/ACPI_Spec_6_5_Aug29.pdf>`_,
    August 2022, `UEFI Forum <https://uefi.org/>`_
 
+.. [DTSCHEMA] `Devicetree schema tools v2024.02
+   <https://github.com/devicetree-org/dt-schema/releases/tag/v2024.02>`_,
+   `Devicetree.org <https://www.devicetree.org/>`_
+
 .. [DTSPEC] `Devicetree specification v0.4
    <https://github.com/devicetree-org/devicetree-specification/releases/tag/v0.4>`_,
    `Devicetree.org <https://www.devicetree.org/>`_