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applications: nrf_desktop: Allow Bluetooth legacy pairing
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Legacy pairing support is disabled by default since the recent
Zephyr upmerge. Enable it back to improve interoperability.

Jira: NCSDK-31809

Signed-off-by: Marek Pieta <Marek.Pieta@nordicsemi.no>
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MarekPieta committed Feb 21, 2025
1 parent 96683e2 commit 59aaf3c
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5 changes: 5 additions & 0 deletions applications/nrf_desktop/Kconfig.ble
Original file line number Diff line number Diff line change
Expand Up @@ -305,6 +305,11 @@ config BT_DEVICE_APPEARANCE
keyboard. Other nRF Desktop devices use Bluetooth appearance of
generic human interface device.

config BT_SMP_SC_PAIR_ONLY
default n
help
nRF Desktop devices allow legacy pairing to improve interoperability.

config BT_SETTINGS_CCC_STORE_ON_WRITE
default y
help
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Expand Up @@ -246,6 +246,10 @@ nRF Desktop
* Disabled Bluetooth long workqueue (:kconfig:option:`CONFIG_BT_LONG_WQ`).
* Limited the number of key slots in the PSA Crypto core to 10 (:kconfig:option:`CONFIG_MBEDTLS_PSA_KEY_SLOT_COUNT`).

* The default value of :kconfig:option:`CONFIG_BT_SMP_SC_PAIR_ONLY` Kconfig option to ``n`` if :ref:`CONFIG_DESKTOP_BT <config_desktop_app_options>` Kconfig option is enabled.
nRF Desktop devices allow Bluetooth LE legacy pairing to improve interoperability.
The :kconfig:option:`CONFIG_BT_SMP_SC_PAIR_ONLY` Kconfig option was enabled by default in Zephyr Bluetooth host.

* Disabled the :kconfig:option:`CONFIG_CLOCK_CONTROL_NRF2_GLOBAL_HSFLL_REQ_LOW_FREQ` Kconfig option in the IPC radio image configuration for the nRF54H20 SoC.
This is done to ensure that the radio core requests high Global Domain (GD) frequency.
The option was enabled by default, because the clock control is enabled by the Multiprotocol Service Layer (MPSL).
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