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doc: migration-guide-4.1: Add mention of deprecated BT_CTLR

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Mention that BT_CTLR has been deprecated, and explain the new option that
replaces it.

Signed-off-by: Johan Hedberg <johan.hedberg@silabs.com>
This commit is contained in:
Johan Hedberg 2024-11-29 09:19:34 +02:00 • committed by Benjamin Cabé
commit fc6911048f
1 changed files with 6 additions and 0 deletions
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doc/releases/migration-guide-4.1.rst
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@ -188,6 +188,12 @@ Bluetooth
Bluetooth HCI
=============
* The :kconfig:option:`BT_CTLR` has been deprecated. A new :kconfig:option:`HAS_BT_CTLR` has been
introduced which should be selected by the respective link layer Kconfig options (e.g. a
HCI driver option, or the one for the upstream controller). It's recommended that all HCI drivers
for local link layers select the new option, since that opens up the possibility of indicating
build-time support for specific features, which e.g. the host stack can take advantage of.
Bluetooth Mesh
==============