default or selected kernelversion does not have config value CONFIG_BT_L2CAP.
Result is shown for kernelversion 6.2.5
L2CAP protocol support
configname: CONFIG_BT_L2CAP
Linux Kernel Configuration
└─>Networking support
└─>Bluetooth subsystem support
└─>L2CAP protocol support
In linux kernel since version 2.6.12
L2CAP (Logical Link Control and Adaptation Protocol) provides
connection oriented and connection-less data transport. L2CAP
support is required for most Bluetooth applications.
Also included is support for SMP (Security Manager Protocol) which
is the security layer on top of LE (Low Energy) links.
connection oriented and connection-less data transport. L2CAP
support is required for most Bluetooth applications.
Also included is support for SMP (Security Manager Protocol) which
is the security layer on top of LE (Low Energy) links.