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Update devicetree macros BNF for child index macros #42

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Update devicetree macros BNF for child index macros #42

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doc: update macros BNF for child index macros
soburi Oct 4, 2025
7fe6a15
Allow child index macros beyond single digits
soburi Oct 4, 2025
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5 changes: 3 additions & 2 deletions doc/build/dts/macros.bnf
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Original file line number Diff line number Diff line change
@@ -1,4 +1,4 @@
; An RFC 7405 ABNF grammar for devicetree macros.

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;
; This does *not* cover macros pulled out of DT via Kconfig,
; like CONFIG_SRAM_BASE_ADDRESS, etc. It only describes the
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node-macro =/ %s"DT_N" path-id %s"_FOREACH_NODELABEL" [ %s"_VARGS" ]
; These are used internally by DT_NUM_NODELABELS
node-macro =/ %s"DT_N" path-id %s"_NODELABEL_NUM"
; The node's zero-based index in the list of it's parent's child nodes.
node-macro =/ %s"DT_N" path-id %s"_CHILD_IDX"
; Macros which expand to the node identifiers for each child by index.
node-macro =/ %s"DT_N" path-id %s"_CHILD_IDX_" DIGIT
node-macro =/ %s"DT_N" path-id %s"_CHILD_IDX_" 2*DIGIT
; The node's status macro; dt-name in this case is something like "okay"
; or "disabled".
node-macro =/ %s"DT_N" path-id %s"_STATUS_" dt-name
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